Toyota Prius: Hybrid Battery System (for 2zr-fxe)

Toyota Prius (XW60) 2023-2025 Service Manual / Engine/Hybrid System / Hybrid / Battery Control / Hybrid Battery System (for 2zr-fxe)

Precaution
Definition Of Terms
Parts Location
How To Proceed With Troubleshooting
Utility
Terminals Of Ecu
Diagnosis System
Dtc Check / Clear
Freeze Frame Data
Vehicle Behavior Chart
Data List / Active Test
Registration / Initialization / Learning
VEHICLE CONTROL HISTORY (RoB)
System Voltage (BATT) Circuit Short to Ground or Open (P056014)
Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)
Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground (P0A8111,P0A814B)
Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)
High Voltage Fuse Accumulated Load History (P0A9563)
Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)
Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range (P0A9B1C,P0AC51C,P0ACA1C,P0AE81C,P0BC21C,P0C331C)
Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range (P0A9B2A,P0AC52A,P0ACA2A,P0AE82A,P0BC22A,P0C332A,P306562,P306A62)
Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground (P0AAC11,P0AAC15)
Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P0B0E11,P0B0E15,P1CBB12,P1CBB14)
Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure (P0ABF28)
Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)
Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure (P0B1362)
Hybrid/EV Battery State of Charge High (P0C3000)
Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance (P0E2D00)
Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold (P1A6017,P31AA17)
Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold (P1A6116,P31AB16)
Hybrid/EV Battery Stack 1 Delta SOC High (P1A8000,P1A8500)
Hybrid/EV Battery Stack 1 Delta SOC High (Extreme) (P1A8100,P1A8600)
System Voltage (AM) Circuit Voltage Below Threshold (P1AFC00)
Flying Capacitor Circuit Voltage Out of Range (P1AFD00)
Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range (P1AFD1C)
Hybrid/EV Battery ECU Multiple Reset (P1AFF00)
High Voltage Power Resource Internal Electronic Failure (P1C8549)
Hybrid/EV Battery Stack 1 Voltage Difference Out of Range (P1CC81E,P1CC91E)
Hybrid/EV Battery Discharge Control Malfunction (P300000)
Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)
Hybrid/EV Battery Control System Over Temperature (P30004B)
Hybrid/EV Battery Voltage High (P31B300)
Extreme Hybrid/EV Battery Charging Current (P31B400)
Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)
Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold (P33E01B,P33E11B)
Hybrid/EV Battery Stack 1 Capacity Decline (P33E600,P33E700)
(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold (P33EC16,P33ED16)
Lost Communication with ECM/PCM "A" Missing Message (U010087)
Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message (U115087)
"HAVE TRACTION BATTERY INSPECTED" is displayed
ECU Power Source Circuit

Precaution

PRECAUTION

PRECAUTIONS FOR INSPECTING HYBRID SYSTEM

CAUTION:

Before the following operations are conducted, take precautions to prevent electric shock by turning the ignition switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the Toyota Prius vehicle.
After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

*a

Without waiting for 10 minutes
When trouble shooting high voltage circuit, use either a tool wrapped with vinyl insulation tape or an insulated tool. (It is extremely dangerous when a high-voltage charge passes through a non-insulated tool causing a short.)
When turning the ignition switch ON during an inspection, do not press the ignition switch while depressing the brake pedal.
Pressing the ignition switch with the brake pedal depressed causes the system to enter the READY-on state. This is very dangerous because high voltage may be applied to the inspection area.

NOTICE:

After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) unless instructed by the repair manual.
Turn the ignition switch off before performing any resistance checks.
Turn the ignition switch off before disconnecting or reconnecting any connectors.
When high-voltage connectors are removed, wrap the connectors with insulation tape to prevent them from contacting foreign matter.

HINT:

Removing the service plug grip
Click here
Checking the terminal voltage
Click here
Disconnecting the motor cable
Click here
Disconnecting the floor under wire
Click here

HYBRID CONTROL SYSTEM ACTIVATION

HINT:

When the warning is illuminated, or the auxiliary battery has been disconnected and reconnected, attempting to turn the ignition switch to ON (READY) may not start the system (the system may not enter the READY-on state) on the first attempt. If so, turn the ignition switch off and reattempt to start the hybrid system.

DISPOSING OF HV BATTERY

When disposing of HV battery, make sure to return them through an authorized collection agent who is capable of handling them safely. If they are returned via the manufacturer specified route, they will be returned properly and in a safe manner by an authorized collection agent.

CAUTION:

After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.
Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned.
Therefore, make sure to return HV battery through an authorized collection agent.

*a

Dealer

*b

Battery Collection Agent
To reduce the risk of fire, HV battery must not be stored in an area where they will be exposed to fire or high temperatures.
If the temperature of the HV battery is high, leave the Toyota Prius vehicle until the temperature drops.
Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing them.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

NOTICE:

Before returning the HV battery, make sure to perform a recovery inspection.
Click here

PRECAUTIONS WHEN REPLACING HYBRID Toyota Prius Vehicle CONTROL ECU

NOTICE:

Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here
When the hybrid vehicle control ECU is replaced, perform ECU configuration.
Click here
When the hybrid Toyota Prius vehicle control ECU is replaced, update the ECU security key.
Click here

PRECAUTIONS WHEN REPLACING INVERTER WITH CONVERTER ASSEMBLY

NOTICE:

When the inverter with converter assembly is replaced, perform ECU configuration.

Click here

PRECAUTIONS FOR DISCONNECTING AND RECONNECTING CABLE TO NEGATIVE (-) AUXILIARY BATTERY TERMINAL

NOTICE:

To prevent damage to electronic components, disconnect the cable from the negative (-) auxiliary battery terminal before performing work.
Be sure to turn the ignition switch off before disconnecting the cable from the negative (-) auxiliary battery terminal.
Be careful not to damage the cable or terminal.
When the negative (-) auxiliary battery terminal is disconnected, the clock and radio settings, etc., as well as any stored DTCs, will be cleared.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
- When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
  Click here

PRECAUTIONS FOR DISCONNECTING AMD TERMINAL

The AMD terminal is connected to the positive terminal of the auxiliary battery.

*1	AMD Terminal (Inverter with Converter Assembly Side)
*2	AMD Terminal (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)

NOTICE:

Be sure to disconnect the cable from the negative (-) auxiliary battery terminal before disconnecting the AMD terminal from the No. 1 engine room relay block and No. 1 junction block assembly.
A short circuit to ground may occur if the AMD terminal is disconnected before the cable is disconnected from the negative (-) auxiliary battery terminal. If a short circuit to ground occurs, a fusible link or fuse may break.
Do not disconnect the AMD terminal except when replacing the inverter with converter assembly.
When disconnection is necessary, be careful not to apply excessive force to the terminal.
After disconnecting the AMD terminal, wrap it with vinyl insulating tape.
Be sure to reconnect the AMD terminal to the No. 1 engine room relay block and No. 1 junction block assembly before reconnecting the cable to the negative (-) terminal of the auxiliary battery.

Definition Of Terms

DEFINITION OF TERMS

Term	Definition
Monitor Description	Description of what the battery ECU assembly monitors and how to detects malfunctions (monitoring purpose and its details).
Related DTCs	A group of diagnostic trouble codes that are output by the battery ECU assembly based on the same malfunction detection logic.
Typical Enabling Conditions	Preconditions that allow the battery ECU assembly to detect malfunctions. With all preconditions satisfied, the battery ECU assembly stores DTCs when the monitored value(s) exceeds malfunction threshold(s).
Sequence of Operation	Order of monitor priority, applied if multiple sensors and components are involved in a single malfunction detection process. Each sensor and component are monitored in turn and subsequent items are not monitored until the previous detection operation completes.
Required Sensors/Components	Sensors and components used by the battery ECU assembly to detect each malfunction.
Frequency of Operation	Number of times the battery ECU assembly checks for each malfunction during each driving cycle. "Once per driving cycle" means that the battery ECU assembly only checks for malfunctions once during a single driving cycle. "Continuous" means that the battery ECU assembly checks for malfunctions whenever enabling conditions are met.
Duration	Minimum time for which the battery ECU assembly must detect continuous deviation in monitored value(s) in order to store a DTC. Timing begins when typical enabling conditions are met.
Malfunction Thresholds	Value beyond which the battery ECU assembly determines malfunctions exist and stores DTCs.
MIL Operation	Timing of MIL illumination after a malfunction is detected. "Immediate" means that the battery ECU assembly illuminates the MIL as soon as a malfunction is detected. "2 driving cycles" means that the battery ECU assembly illuminates the MIL if the same malfunction is detected again during the next driving cycle.

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	INVERTER WITH CONVERTER ASSEMBLY	*2	COMPRESSOR WITH MOTOR ASSEMBLY
*3	INVERTER WATER PUMP ASSEMBLY	*4	HYBRID Toyota Prius Vehicle TRANSAXLE ASSEMBLY
*5	HV FLOOR UNDER WIRE	*6	HV BATTERY
*7	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY	*8	ECM

ILLUSTRATION

*1	INVERTER WITH CONVERTER ASSEMBLY	*2	LOW VOLTAGE CONNECTOR
*3	HV AIR CONDITIONING WIRE CONNECTION	*4	HV FLOOR UNDER WIRE (HV BATTERY) CONNECTION
*5	MOTOR CABLE CONNECTION	*6	INVERTER COVER - INTERLOCK
*7	MOTOR CABLE	*8	HYBRID Toyota Prius Vehicle TRANSAXLE ASSEMBLY
*9	SHIFT CONTROL ACTUATOR	*10	MOTOR TEMPERATURE SENSOR AND GENERATOR TEMPERATURE SENSOR CONNECTOR
*11	MOTOR RESOLVER, GENERATOR RESOLVER AND TRANSMISSION FLUID TEMPERATURE SENSOR CONNECTOR	*12	AMD TERMINAL
*13	LOW VOLTAGE CONNECTOR (DC/DC CONVERTER)	-	-

ILLUSTRATION

*1	SERVICE PLUG GRIP	*2	HV BATTERY JUNCTION BLOCK ASSEMBLY
*3	BATTERY ECU ASSEMBLY	*4	BATTERY COOLING BLOWER ASSEMBLY
*5	BATTERY CURRENT SENSOR	*6	SMRB
*7	SMRG	-	-

ILLUSTRATION

*1	HYBRID Toyota Prius Vehicle CONTROL ECU	*2	AIRBAG SENSOR ASSEMBLY
*3	TRANSMISSION FLOOR SHIFTASSEMBLY	*4	ELECTRIC PARKING BRAKE SWITCH ASSEMBLY (COMBINATION SWITCH) - DRIVE MODE SELECT SWITCH - EV DRIVE MODE SWITCH
*5	ACCELERATOR PEDAL SENSOR ASSEMBLY	*6	DLC3
*7	COMBINATION METER ASSEMBLY	*8	STOP LIGHT SWITCH ASSEMBLY
*9	POWER DISTRIBUTION BOX ASSEMBLY	*10	AIR CONDITIONING AMPLIFIER ASSEMBLY

How To Proceed With Troubleshooting

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

If the malfunction is not reproduced, perform a simulation test.

Click here

For the simulation test, reproduce the driving conditions that were present when the problem occurred. These conditions should be based on the customer's comments and Freeze Frame Data that is recorded with DTCs, such as the opening angle of the accelerator pedal, SOC (stateof charge), engine coolant temperature, engine speed, and generator (MG1) / front motor (MG2) / rear motor (MGR) rpm and torque.
When inspecting electrical circuits, check the connection condition of the connector and the contact pressure of each terminal.
Check the terminals for deformation, and check the connector for water ingress and foreign matter.

Click here

3.	CONDUCT BASIC INSPECTION

(a) Measure the auxiliary battery voltage with the ignition switch off.

Standard Voltage:

11 to 14 V

(b) Check the connection of the negative (-) and positive ( ) auxiliary battery terminals.

OK:

The terminals are connected securely and there is no contact problem.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

4.	READ VALUE USING GTS

(a) Perform the Health Check using the GTS.

(b) Perform the following steps when the data setting screen is displayed.

(1) Select the systems for which to perform Health Check and check for time stamp data.

Selectable items:

Powertrain
Chassis
Body
Store All Data

HINT:

The hybrid system performs control and intercommunication with other systems, so check and record the DTCs for all systems.

HINT:

If "Yes" is not selected, time stamp data will not be stored.

(d) Check for DTC and Toyota Prius Vehicle Control History (RoB) code output.

If an abnormality judgment flag has not been output during the current trip, perform the inspection for simulation method.

If the malfunction symptoms are not reproduced, it can be judged that the condition has returned to normal. GTS Display

Current / Confirmed	Pending	History	Test Failed	5 digits DTC	7 digits DTC
x				Shows the malfunction judgment results during the current trip.	Shows the malfunction judgment results during the current trip.
		x		Shows the malfunction judgment results up to now.	-
	x			Shows the malfunction judgment results up to now.	Shows the malfunction judgment results up to now.
x			x	-	Shows the malfunction judgment results during the current trip.

Result	Proceed to
DTCs are output.	A
Toyota Prius Vehicle Control History (RoB) code is output, but DTC is not output.	B
DTC is not output and Vehicle Control History (RoB) code is not output, but malfunction symptoms are reproduced.	C

GO TO Toyota Prius Vehicle CONTROL HISTORY (RoB)

GO TO PROBLEM SYMPTOMS TABLES

5.	GO TO DTC CHART

Referring to the DTC chart, perform troubleshooting according to the applicable code.

Hybrid control system
Click here
Motor Generator control system
Click here
Hybrid battery system
Click here

6.	ADJUST AND/OR REPAIR

CONDUCT CONFIRMATION TEST

(a) Clear the DTCs.

(b) Then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

For details, refer to the confirmation driving pattern for the relevant DTC diagnostic procedure.

Utility

UTILITY

NOTICE:

If the HV battery has been replaced, make sure to perform the following utilities in the following order: "Battery Status Info Update", "Prediagnostic Battery Charge" then "Battery Diagnosis".
"Have Traction Battery Inspected" is displayed, perform both "Prediagnostic Battery Charge" and "Battery Diagnosis" to diagnose the extent of deterioration of each HV battery cell.
"Have Traction Battery Inspected" is cleared after both "Prediagnostic Battery Charge" and "Battery Diagnosis" are performed and "There is no need to replace HV battery." is displayed.
After the "Have Traction Battery Inspected" is displayed, if the traction battery is used continually without performing "Prediagnostic Battery Charge" and "Battery Diagnosis" for a few weeks*, use of the HV battery (input/output voltage) will be limited. If it is used more, the ignition switch ON (READY) operation will be disabled.
*: Timing may vary depending on Toyota Prius vehicle usage.
If the ignition switch cannot be turned to ON (READY), perform "Temporary Vehicle Start Up", "Prediagnostic Battery Charge" and "Battery Diagnosis".

HINT:

If "Have Traction Battery Inspected" is displayed, .

PURPOSE

Utility Items (GTS Display)	Main Purpose	Control Description
All Readiness	Check whether or not DTC judgment has been completed.	-
Diagnosis Related Information	Confirm the diagnosis related information	-
Prediagnostic Battery Charge	Before performing "Battery Diagnosis", charge the HV battery, as a high SOC of the HV battery is required to start "Battery Diagnosis".	-
Battery Diagnosis	Discharge the HV battery and diagnose the extent of deterioration of each HV supply stack sub-assembly based on the SOC.	-
Battery Status Info Update	Initialize the HV battery age information.	-
Temporary Toyota Prius Vehicle Start Up	Temporarily enable the ignition switch on (Ready) operation which has been disabled due to continual usage of the vehicle without performing battery diagnosis.	-
High Voltage Fuse Accumulated Load History Reset	Initialize the load history of the high voltage fuse.
Toyota Prius Vehicle Control History (RoB)	View vehicle control history.

ALL READINESS

HINT:

With "All Readiness", you can check whether or not the DTC judgment has been completed by using the GTS.
You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

(a) Clear the DTCs even if no DTCs are stored.

Powertrain > HV Battery > Clear DTCs

(b) Turn the ignition switch off and wait for at least 2 minutes.

(d) Perform the DTC judgment driving pattern to run the DTC judgment.

(e) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
All Readiness

(f) Input the DTCs to be confirmed.

(g) Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform the driving pattern

If the judgment result shows Incomplete, perform the DTC confirmation driving pattern again.

DIAGNOSIS RELATED INFORMATION

(a) Check for diagnosis related information.

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Diagnosis Related Information

(2) Check the Diagnosis Related Information, and then write them down.

(b) Clear diagnosis related information.

NOTICE:

Clearing the DTCs will also clear the diagnosis related information.

(1) Enter the following menus.

Powertrain > HV Battery > Clear DTCs

(2) Clear the DTCs.

BATTERY STATUS INFO UPDATE

HINT:

If the HV battery has been replaced, make sure to perform "Battery Status Info Update" to initialize the HV battery age information stored in the battery ECU assembly.

(a) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Battery Status Info Update

PREDIAGNOSTIC BATTERY CHARGE

NOTICE:

If the fuel level warning is illuminated, add enough fuel that the light turns off, and then perform "Prediagnostic Battery Charge".
Perform HV battery charging with appropriate HV battery temperature, between 0°C (32°F) and 47°C (116.6°F).
Do not perform prediagnostic battery charge while the master warning is illuminated.
Perform prediagnostic battery charge with the HV battery installed correctly.
Do not perform "Prediagnostic Battery Charge" while changing from inspection mode to another mode.

HINT:

If the HV battery temperature is low (below 0°C (32°F)), drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more and perform "Prediagnostic Battery Charge" again.
If the HV battery temperature is high (above 47°C (116.6°F)), leave the vehicle with the ignition switch ON (READY) and the shift lever in P. Wait until the HV battery temperature drops to 42°C (107.6°F) or lower, and then perform "Prediagnostic Battery Charge" again.
If the HV battery temperature is low (below 0°C (32°F)) and the ignition switch cannot be turned to ON (READY), place the Toyota Prius vehicle in a warm environment (20°C (68°F) or higher). Wait until the HV battery temperature reaches 0°C (32°F) or higher, and then perform "Prediagnostic Battery Charge" again.

(a) When using the GTS:

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Prediagnostic Battery Charge

(2) Check items on the display and press "Next".

(3) When the prediagnostic battery charge is suspended because the charging conditions are not met anymore, the reasons for suspension are displayed on the GTS. Perform "Prediagnostic Battery Charge" after checking the causes and troubleshoot the suspected area in accordance with instructions in the "Procedure when prediagnostic battery charge is suspended" table.

Procedure when prediagnostic battery charge is suspended

GTS Display	Reason for Charging Suspension (Related Condition)	Procedure
105	Unable to complete the current sensor offset learning	Turn the ignition switch off and then perform "Prediagnostic Battery Charge" again. (If trouble code 105 is output again, inspect the current sensor.)
107	HV battery connection malfunction	Confirm the connection condition of the HV battery.
108	Shift state park (P) is not selected.	Move the shift lever to P.
109	The ignition switch was turned off or a GTS communication error occurred.	After checking that the connector of the GTS is not disconnected from the DLC3, perform "Prediagnostic Battery Charge" again.
110	Current out of the specified range (-60 to 25 A)	If accessories are connected to the Toyota Prius vehicle, turn them on/off or disconnect them from the vehicle.
111	Battery temperature out of the specified range (0°C (32°F) to 47°C (116.6°F))	Read the temperatures listed in "Hybrid/EV Battery Temperature 1 to 6". When the HV battery temperature is below 0°C (32°F): Drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more. When the HV battery temperature is above 47°C (116.6°F): Leave the vehicle with the ignition switch ON (READY) and the shift lever in P and wait until the HV battery temperature drops to 42°C (107.6°F) or lower.
112	Excessive charge	Check "Hybrid/EV Battery SOC" listed in the Data List. When the SOC is below 74%: Turn the ignition switch off and perform "Prediagnostic Battery Charge" again. When the SOC is 74% or more: Cancel "Prediagnostic Battery Charge" and perform "Battery Diagnosis" again.
113	Excessive voltage	Cancel "Prediagnostic Battery Charge" and perform "Battery Diagnosis" again.
115	Time-out	If the ignition switch is turned off by the time-out function, perform "Prediagnostic Battery Charge" again.
116	HV battery malfunction	Check for Hybrid Battery System related DTCs and perform troubleshooting. After checking that the master warning has turned off, perform "Prediagnostic Battery Charge" again.
117	System malfunction
118	Low auxiliary battery voltage	Inspect the auxiliary battery and hybrid Toyota Prius vehicle converter function.

(4) The screen transitions to the next screen and "Turn the ignition switch to ON (READY)" is displayed.

(5) While depressing the brake pedal, turn the ignition switch to ON (READY).

HINT:

The engine starts without the READY indicator illuminated.

(6) The screen transitions to the next screen and "Charging the battery." is displayed.

NOTICE:

If a DTC is stored during "Prediagnostic Battery Charge", the master warning will turn on and stop the charging.

HINT:

Time required for "Prediagnostic Battery Charge" varies by the SOC of the HV battery when the charging is started.
To suspend prediagnostic battery charge, press "Exit" and turn the ignition switch off.

(7) When the prediagnostic battery charge is suspended because the charging conditions are not met anymore, the reasons of suspension are displayed on the GTS. Perform "Battery Diagnosis" after checking the causes and troubleshoot the suspected area in accordance with instructions in the "Procedure when prediagnostic battery charge is suspended" table.

(8) The engine stops when "Prediagnostic Battery Charge" is complete.

(9) The screen transitions to the next screen and "Prediagnostic Battery Charge is complete." is displayed.

(10) Press "Exit" and turn the ignition switch off.

(b) When not using the GTS:

(1) Perform the following procedure within 60 seconds of the ignition switch being turned to ON.

Check that the shift lever is in P. (Do not depress the accelerator pedal.)
While depressing the brake pedal with your left foot, move the shift lever to N and fully depress the accelerator pedal three times with your right foot.
Move the shift lever to P, and then fully depress the accelerator pedal twice.
While depressing the brake pedal with your left foot, move the shift lever to N and fully depress the accelerator pedal three times with your right foot.
Move the shift lever to P, and then fully depress the accelerator pedal twice.

HINT:

Fully depressing the accelerator pedal from the closed position is counted as one operation.

(2) Wait for 5 seconds.

(3) While depressing the brake pedal, turn the ignition switch to ON (READY).

HINT:

The engine starts without the READY indicator illuminated.
If the SOC indicator of the HV battery shows 6 segments or more, charging of the Toyota Prius vehicle is not necessary. Therefore, the engine will not start. In this case, perform "Battery Diagnosis".

(4) Wait until the engine stops.

NOTICE:

If a DTC is stored during "Prediagnostic Battery Charge", the master warning will turn on and stop the charging.

HINT:

Time required for "Prediagnostic Battery Charge" varies by the SOC of the HV battery when the charging is started.
To suspend prediagnostic battery charge, turn the ignition switch off.

(5) The engine stops when "Prediagnostic Battery Charge" is complete.

HINT:

If "Prediagnostic Battery Charge" completes correctly, the SOC indicator of the HV battery will show 6 segments or more.

(6) Turn the ignition switch off.

BATTERY DIAGNOSIS

NOTICE:

Perform this diagnosis with the engine coolant at -10°C (14°F) or more.
Perform battery diagnosis with appropriate HV battery temperature (between 0°C (32°F) and 47°C (116.6°F)).
Do not perform battery diagnosis while the master warning is illuminated.
Perform battery diagnosis with the HV battery installed correctly.
Do not perform battery diagnosis while changing from inspection mode to another mode.
Make sure to turn the ignition switch off after battery diagnosis to prevent the auxiliary battery from being discharged.

HINT:

If the HV battery temperature is low (below 0°C (32°F)), drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more and perform "Battery Diagnosis" again.
If the HV battery temperature is high (above 47°C (116.6°F)), leave the vehicle with the ignition switch ON (READY) and the shift lever in P. Wait until the HV battery temperature drops to 42°C (107.6°F) or lower, and then perform "Battery Diagnosis" again.
If the HV battery temperature is low (below 0°C (32°F)) and the ignition switch cannot be turned to ON (READY), place the Toyota Prius vehicle in a warm environment (20°C (68°F) or higher). Wait until the HV battery temperature reaches 0°C (32°F) or higher, and then perform "Battery Diagnosis" again.

(a) When using the GTS:

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Battery Diagnosis

(2) Check items on the display and press "Next".

(3) When the battery diagnosis is suspended because the diagnosis conditions are not met anymore, the reasons for suspension are displayed on the GTS. Perform "Battery Diagnosis" after checking the causes and troubleshoot the suspected area in accordance with instructions in the "Procedure when battery diagnosis is suspended" table.

Procedure when battery diagnostic is suspended

GTS Display	Reason for Diagnosis Suspension (Related Condition)	Procedure
004	Voltage too low	Turn the ignition switch off and then perform "Prediagnostic Battery Charge" again.
005	Unable to complete the current sensor offset learning	Turn the ignition switch off and then perform "Battery Diagnosis" again. (If trouble code 005 is output again, inspect the current sensor.)
006	The ignition switch was turned off.	After checking that the connector of the GTS is not disconnected from the DLC3, perform "Prediagnostic Battery Charge" again.
007	Shift state park (P) is not selected.	Move the shift lever to P.
008	HV battery connection malfunction	Confirm the connection condition of the HV battery.
009	GTS communication error occurred.	After checking that the connector of the GTS is not disconnected from the DLC3, perform "Prediagnostic Battery Charge" again.
010	Current out of the specified range (2.00 to 10.00 A)	Confirm that the Toyota Prius vehicle satisfies the "Vehicle Condition" specified in the following table. If accessories are connected to the vehicle, turn them on/off or disconnect them from the vehicle.
011	Battery temperature out of the specified range (0°C (32°F) to 47°C (116.6°F))	Read the temperatures listed in "Hybrid/EV Battery Temperature 1 to 6". When the HV battery temperature is below 0°C (32°F): Drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more. When the HV battery temperature is above 47°C (116.6°F): Leave the vehicle with the ignition switch ON (READY) and the shift lever in P and wait until the HV battery temperature drops to 42°C (107.6°F) or lower.
012	Time-out	If the ignition switch is turned off by the time-out function, perform "Prediagnostic Battery Charge" again.
013	Low auxiliary battery voltage	Inspect the auxiliary battery and hybrid Toyota Prius vehicle converter function.
014	HV battery malfunction	Check for Hybrid Battery System related DTCs and perform troubleshooting. After checking that the master warning has turned off, perform "Prediagnostic Battery Charge" again.
015	System malfunction

(4) The screen transitions to the next screen and "Operate the Toyota Prius vehicle as instructed in the repair manual and turn the ignition switch to ON (READY)." is displayed.

(5) Adjust the vehicle condition as specified in the following table.

Vehicle Condition

Item		Condition
(1)	Blower speed	HI
(2)	Air conditioning system set temperature	MAX COLD
(3)	Position of the mode controller damper	FACE
(4)	Position of the air mix controller damper	Recirculate
(5)	A/C switch	OFF
(6)	Position of the headlight dimmer switch	High beam
(7)	Hazard warning signal switch assembly	ON

HINT:

Turn off all switches other than the headlight dimmer switch, air conditioning system and hazard warning signal switch assembly related switches.

(6) While depressing the brake pedal, turn the ignition switch to ON (READY).

HINT:

The READY indicator does not illuminate.

(7) The screen transitions to the next screen and "Now diagnosing" is displayed.

HINT:

"Progress" is displayed as a reference to the estimated time to complete the diagnosis.
To suspend battery diagnosis, press "Exit" and turn the ignition switch off.

(8) The screen changes to the "Battery Diagnosis" screen and "Have Traction Battery Inspected" is cleared simultaneously.

NOTICE:

It takes about 40 to 60 minutes for battery diagnosis to complete. As the diagnosis may be stopped due to an error, make sure to check the diagnosis status every 10 minutes.
If a DTC is stored during "Battery Diagnosis", the master warning will turn on and battery diagnosis.

HINT:

If battery diagnosis is suspended because the diagnosis conditions are not met anymore, the reasons for suspension are displayed on the GTS. Perform "Battery Diagnosis" after checking the causes and troubleshoot the suspected area in accordance with instructions in the "Procedure when battery diagnosis is suspended" table.

(9) When battery diagnosis completes successfully, "Turn the engine/power switch OFF." is displayed.

HINT:

If "Maintenace Requird For Traction Battery AT Your Dealer" is displayed, follow the procedure displayed on the GTS.

(10) Press "Exit", turn the power switch off and wait for 60 seconds or more.

NOTICE:

To prevent the auxiliary battery from being depleted, make sure to turn the air conditioning system related switches, headlight dimmer switch, hazard warning signal switch assembly and ignition switch off as soon as "Battery Diagnosis" is complete.

(11) Check the diagnosis result.

HINT:

If the diagnosis result is "Replace the HV battery", replace the HV battery.
After performing "Battery Diagnosis", the trip will be determined to have ended when 60 seconds have elapsed since the ignition switch was turned off. If the ignition switch is attempted to be turned on (READY) before 60 seconds have elapsed since the ignition switch was turned off, it may not be able to be turned on (READY).

If the diagnosis result states to replace an HV supply stack sub-assembly, replace the listed HV battery.

(12) As the SOC of the HV battery will be low after performing "Battery Diagnosis", charge the HV battery by turning the ignition switch to ON (READY) and allowing the engine to idle until it stops.

HINT:

As "Battery Diagnosis" discharges the HV battery to a low SOC, if the power switch is turned on immediately after the "Battery Diagnosis" is completed, DTC P300000 or P300016 may be stored. For this reason, leave the Toyota Prius vehicle as is for 5 hours to allow the HV battery SOC to recover or charge the HV battery using the THS Charger. Then, clear the DTCs and check that no DTCs are output. If DTC P300000 or P300016 is output again, perform troubleshooting for the DTC.

(b) When manually starting "Battery Diagnosis":

(1) Perform the following procedure within 60 seconds of the ignition switch being turned to ON.

Check that the shift lever is in P. (Do not depress the accelerator pedal.)
While depressing the brake pedal with your left foot, move the shift lever to N and fully depress the accelerator pedal three times with your right foot.
Move the shift lever to P, and then fully depress the accelerator pedal once.
While depressing the brake pedal with your left foot, move the shift lever to N and fully depress the accelerator pedal three times with your right foot.
Move the shift lever to P, and then fully depress the accelerator pedal once.

HINT:

Fully depressing the accelerator pedal from the closed position is counted as one operation.

(2) Wait for 5 seconds.

(3) Adjust the Toyota Prius vehicle condition as specified in the following table.

Vehicle Condition

Item		Condition
(1)	Blower speed	HI
(2)	Air conditioning system set temperature	MAX COLD
(3)	Position of the mode controller damper	FACE
(4)	Position of the air mix controller damper	Recirculate
(5)	A/C switch	OFF
(6)	Position of the headlight dimmer switch	High beam
(7)	Hazard warning signal switch assembly	ON

HINT:

Turn off all switches other than the headlight dimmer switch, air conditioning system and hazard warning signal switch assembly related switches.

(4) While depressing the brake pedal, turn the ignition switch to ON (READY).

HINT:

The READY indicator does not illuminate.

(5) The screen changes to the "Battery Diagnosis" screen and "Have Traction Battery Inspected" is cleared simultaneously.

NOTICE:

It takes about 40 to 60 minutes for battery diagnosis to complete. As the diagnosis may be stopped due to an error, make sure to check the diagnosis status every 10 minutes.
If a DTC is stored during "Battery Diagnosis", the master warning will turn on and stop the charging.

HINT:

To suspend battery diagnosis, turn the ignition switch off.

If the diagnosis conditions are not met, the ignition switch will turn off immediately after it is turned on (READY). In this case, "Voltage too low", "HV battery connection malfunction" or "Battery temperature out of the specified range" will be the reason for diagnosis suspension. Troubleshoot the suspected area in accordance with instructions in the "Procedure when battery diagnosis is suspended" table. Procedure when battery diagnostic is suspended

Reason of Diagnosis Suspension (Related Condition)	Procedure
Voltage too low	Turn the ignition switch off and then perform "Prediagnostic Battery Charge" again.
Unable to complete the current sensor offset learning	Turn the ignition switch off and then perform "Battery Diagnosis" again. (If diagnosis suspension occurs again, inspect the current sensor.)
The ignition switch was turned off.	Turn the ignition switch off and then perform "Prediagnostic Battery Charge" again.
Shift state park (P) is not selected.	Move the shift lever to P.
HV battery connection malfunction	Confirm the connection condition of the HV battery.
Current out of the specified range (2.00 to 10.00 A)	Confirm that the Toyota Prius vehicle satisfies the "Vehicle Condition" specified in the previous table. If accessories are connected to the vehicle, turn them on/off or disconnect them from the vehicle.
Battery temperature out of the specified range (0°C (32°F) to 47°C (116.6°F))	Read the temperatures listed in "Hybrid/EV Battery Temperature 1 to 6". When the HV battery temperature is below 0°C (32°F): Drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more. When the HV battery temperature is above 47°C (116.6°F): Leave the vehicle with the ignition switch ON (READY) and the shift lever in P and wait until the HV battery temperature drops to 42°C (107.6°F) or lower.
Time-out	If the ignition switch is turned off by the time-out function, perform "Prediagnostic Battery Charge" again.
Low auxiliary battery voltage	Inspect the auxiliary battery and hybrid Toyota Prius vehicle converter function.
HV battery malfunction	Check for Hybrid Battery System related DTCs and perform troubleshooting. After checking that the master warning has turned off, perform "Prediagnostic Battery Charge" again.
System malfunction

(6) Approximately 2 hours after "Battery Diagnosis" is started, the ignition switch is automatically turned off. Turn the ignition switch back to ON and check the diagnosis result.

HINT:

The IG off timer function automatically turns the ignition switch off 10 minutes after "Battery Diagnosis" (which takes approximately 40 to 60 minutes) is complete.

After the ignition switch has been automatically turned off, turn the ignition switch to ON.

Check the multi-information display.

Multi-information Display	Diagnosis Result
"Have Traction Battery Inspected" is displayed.	Replace the HV battery or "Battery Diagnosis" suspended due to an error
"Have Traction Battery Inspected" is not displayed.	There is no need to replace HV battery.

HINT:

As "Battery Diagnosis" discharges the HV battery to a low SOC, if the ignition switch is turned to ON immediately after the "Battery Diagnosis" is completed, DTC P300000 or P300016 may be stored. For this reason, leave the Toyota Prius vehicle as is for 5 hours to allow the HV battery SOC to recover or charge the HV battery using the THS Charger. Then, clear the DTCs and check that no DTCs are output. If DTC P300000 or P300016 is output again, perform troubleshooting for the DTC.
If "Have Traction Battery Inspected" is displayed, "Battery Diagnosis" may have been suspended due to a malfunction. Perform "Prediagnostic Battery Charge" and "Battery Diagnosis" using the GTS.

(7) Turn the ignition switch off and wait for 60 seconds or more.

HINT:

If the diagnosis result is "Replace the HV battery", replace the HV battery.
After performing "Battery Diagnosis", the trip will be determined to have ended when 60 seconds have elapsed since the ignition switch was turned off. If the ignition switch is attempted to be turned to ON (READY) before 60 seconds have elapsed since the ignition switch was turned off, it may not be able to be turned to ON (READY).

(8) As the SOC of the HV battery will be low after performing "Battery Diagnosis", charge the HV battery by turning the ignition switch to ON (READY) and allowing the engine to idle until it stops.

TEMPORARY Toyota Prius Vehicle START UP

NOTICE:

Do not perform temporary vehicle start up while the master warning is illuminated.
Perform only when "Vehicle Start Disabled Until Traction Battery Inspected" is displayed on the multi-information display and the vehicle cannot be started.
"Toyota Prius Vehicle Start Disabled Until Traction Battery Inspected" is not cleared even after "Temporary Vehicle Start Up" is performed.

(a) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Temporary Toyota Prius Vehicle Start Up

NOTICE:

If the ignition switch is turned to ON (READY) while depressing the brake pedal, "Temporary Vehicle Start Up" is not possible. Retry after turning the ignition switch off.

(b) Check items on the display and press "Next".

(d) The screen transitions to the next screen and "Now the Toyota Prius vehicle is ready to start." is displayed.

HINT:

If the ignition switch is turned off after "Temporary Vehicle Start Up", the vehicle will not be able to start again.
The GTS can be disconnected after turning the ignition switch to ON (READY).

(e) Perform "Prediagnostic Battery Charge".

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Prediagnostic Battery Charge

HINT:

Refer to Prediagnostic Battery Charge.

(f) Perform "Battery Diagnosis".

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Battery Diagnosis

HINT:

Refer to Battery Diagnosis.

(g) Turn the ignition switch to ON (READY).

(h) When the condition to perform "Temporary Toyota Prius Vehicle Start Up" is not met, the reasons for suspension are displayed on the GTS. Perform "Temporary Vehicle Start Up" again after checking the causes and troubleshooting the suspected area in accordance with instructions in the "Procedure when temporary vehicle start up is suspended" table.

Procedure when "Temporary Toyota Prius Vehicle Start Up" is suspended

GTS Display	Reason for Temporary Vehicle Start Up Suspension (Related Condition)	Procedure
Temporary Toyota Prius Vehicle Start Up has failed. Confirm the following condition.	GTS communication error	After checking that the connector of the GTS is not disconnected and the ignition switch is ON, perform "Temporary Vehicle Start Up" again.

GTS Display

Reason for Temporary Vehicle Start Up Suspension

(Related Condition)

Procedure

Temporary Toyota Prius Vehicle Start Up has failed. Confirm the following condition.

GTS communication error

After checking that the connector of the GTS is not disconnected and the ignition switch is ON, perform "Temporary Vehicle Start Up" again.

Terminals Of Ecu

TERMINALS OF ECU

Battery ECU Assembly

Connector Code	Terminal No.	Symbol	Terminal Description
R40	1	TC0	Intake air temperature sensor signal
	2	GC0	Intake air temperature sensor ground
	3	-	-
	4	-	-
	5	IB0	Battery current sensor 0 signal
	6	IB1	Battery current sensor 1 signal
	7	-	-
	8	CA2L	CAN communication signal
	9	CA2H	CAN communication signal
	10	GND	Ground
	11	-	-
	12	IGCT	Power source
	13	FP0	HV battery cooling blower monitor signal
	14	SI0	HV battery cooling blower operation signal
	15	-	-
	16	-	-
	17	VIB	Power source for battery current sensor
	18	GIB	Battery current sensor ground
	19	C2LB	CAN communication signal
	20	C2HB	CAN communication signal
	21	CA1L	CAN communication signal
	22	CA1H	CAN communication signal
	23	-	-
	24	AM	Constant power source
z12	1	-	-
	2	-	-
	3	VA27	HV Battery Cell Voltage
	4	VA25	HV Battery Cell Voltage
	5	VA23	HV Battery Cell Voltage
	6	VA21	HV Battery Cell Voltage
	7	VA20	HV Battery Cell Voltage
	8	VA18	HV Battery Cell Voltage
	9	VA16	HV Battery Cell Voltage
	10	VA14	HV Battery Cell Voltage
	11	VA12	HV Battery Cell Voltage
	12	VA10	HV Battery Cell Voltage
	13	VA8	HV Battery Cell Voltage
	14	-	-
	15	-	-
	16	VA6	HV Battery Cell Voltage
	17	VA4	HV Battery Cell Voltage
	18	VA2	HV Battery Cell Voltage
	19	GA0	HV Battery Cell Voltage
	20	-	-
	21	TB1	HV battery temperature sensor 1
	22	GB0	HV battery temperature sensor 0 and 2 ground
	23	VA28	HV Battery Cell Voltage
	24	-	-
	25	-	-
	26	VA26	HV Battery Cell Voltage
	27	VA24	HV Battery Cell Voltage
	28	VA22	HV Battery Cell Voltage
	29	GA1	HV Battery Cell Voltage
	30	VA19	HV Battery Cell Voltage
	31	VA17	HV Battery Cell Voltage
	32	VA15	HV Battery Cell Voltage
	33	VA13	HV Battery Cell Voltage
	34	VA11	HV Battery Cell Voltage
	35	VA9	HV Battery Cell Voltage
	36	-	-
	37	-	-
	38	VA7	HV Battery Cell Voltage
	39	VA5	HV Battery Cell Voltage
	40	VA3	HV Battery Cell Voltage
	41	VA1	HV Battery Cell Voltage
	42	GD0	HV battery temperature sensor 1 ground
	43	TB2	HV battery temperature sensor 2
	44	TB0	HV battery temperature sensor 0
z14	1	-	-
	2	-	-
	3	VA54	HV Battery Cell Voltage
	4	VA52	HV Battery Cell Voltage
	5	VA50	HV Battery Cell Voltage
	6	VA48	HV Battery Cell Voltage
	7	VA46	HV Battery Cell Voltage
	8	VA44	HV Battery Cell Voltage
	9	VA42	HV Battery Cell Voltage
	10	VA40	HV Battery Cell Voltage
	11	VA38	HV Battery Cell Voltage
	12	VA36	HV Battery Cell Voltage
	13	GD1	HV battery temperature sensor 4 ground
	14	TB5	HV battery temperature sensor 5
	15	TB3	HV battery temperature sensor 3
	16	VA35	HV Battery Cell Voltage
	17	-	-
	18	-	-
	19	VA34	HV Battery Cell Voltage
	20	VA32	HV Battery Cell Voltage
	21	VA30	HV Battery Cell Voltage
	22	VAD	HV Battery Cell Voltage
	23	VA56	HV Battery Cell Voltage
	24	-	-
	25	VA55	HV Battery Cell Voltage
	26	VA53	HV Battery Cell Voltage
	27	VA51	HV Battery Cell Voltage
	28	VA49	HV Battery Cell Voltage
	29	VA47	HV Battery Cell Voltage
	30	VA45	HV Battery Cell Voltage
	31	VA43	HV Battery Cell Voltage
	32	VA41	HV Battery Cell Voltage
	33	VA39	HV Battery Cell Voltage
	34	VA37	HV Battery Cell Voltage
	35	GA2	HV Battery Cell Voltage
	36	-	-
	37	TB4	HV battery temperature sensor 4
	38	GB1	HV battery temperature sensor 3 and 5 ground
	39	-	-
	40	-	-
	41	-	-
	42	VA33	HV Battery Cell Voltage
	43	VA31	HV Battery Cell Voltage
	44	VA29	HV Battery Cell Voltage

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) The battery ECU assembly has a self-diagnosis system. If the computer, hybrid control system, or a component is not working properly, the ECU records the conditions that relate to the fault. The ECU also illuminates the master warning in the combination meter assembly and provides other appropriate messages on the multi-information display, such as the HV system warning message, HV battery warning message, or discharge warning message.

When troubleshooting OBD II (On-Board Diagnostics) Toyota Prius vehicles, the GTS (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle ECM (Engine Control Module) can then be read.
OBD II regulations require that the vehicle's on-board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in:
1. The emission control system components.
2. The powertrain control components (which affect Toyota Prius vehicle emissions).
3. The computer itself.
  In addition, the applicable DTCs prescribed by SAE J2012 are recorded in the battery ECU assembly memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the battery ECU assembly memory.
To check for DTCs, connect the GTS to the DLC3. The GTS displays DTCs, freeze frame data, and a variety of hybrid control system data. The DTCs and freeze frame data can be cleared with the GTS. In order to enhance the OBD function on Toyota Prius vehicles and develop the off-board diagnosis system, Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a pair of data transmission lines spanning multiple computers and sensors. It allows for high speed communications between the systems and simplification of the wire harness connections.

2 TRIP DETECTION LOGIC

Following is the description for storage of DTC using "2 trip detection logic".

When a malfunction is first detected, the malfunction is temporarily stored in the battery ECU assembly memory (1st trip). If the same malfunction is detected during the next drive cycle, the MIL is illuminated (2nd trip).

FREEZE FRAME DATA

The battery ECU assembly records Toyota Prius vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

AUXILIARY BATTERY VOLTAGE

Standard Voltage:

Switch Condition	Specified Condition
Ignition switch ON	11 to 14 V

If voltage is below 11 V, replace or recharge the auxiliary battery.
NOTICE:
- After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
  Click here
- When disconnecting and reconnecting the auxiliary battery
  HINT:
  
  When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
  
  Click here
- After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) unless instructed by the repair manual.

MIL (Malfunction Indicator Lamp)

(a) The MIL is illuminated when the ignition switch is first turned to ON, before the READY light comes on.

(b) When the READY indicator turns on, the MIL should turn off. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system.

HINT:

If the MIL is not illuminated when the ignition switch is first turned to ON, check the MIL circuit.

for SFI System: Click here

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK FOR DTCS

(a) Enter the following menus.

Powertrain > HV Battery > Trouble Codes

(b) Check the DTCs and freeze frame data, and then write them down.

Display Item	Description
Test Failed	Shows the malfunction judgment results during the current trip.
Pending	Shows the malfunction judgment results up to now. (Indicates the possibility of a malfunction when no DTC is confirmed.)
Confirmed	Shows the DTCs confirmed up to now. (The number of current trips differs for each DTC.)

A pending DTC is a DTC that is stored in the battery ECU assembly during the 1st trip when the 2 trip detection logic is used.
Freeze frame data is stored for each of the latest result DTCs, pending DTCs and confirmed DTCs.

(1) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Check Mode

(2) Check items on the display and press "Next".

NOTICE:

All the stored DTCs and freeze frame data are cleared if the battery ECU assembly is changed from normal mode to check mode. Before changing modes, always check and note any DTCs and freeze frame data.
Changing from normal mode to check mode function is not available when the ignition switch is turned to ON (READY).
If a DTC is stored, check and note the DTC and freeze frame data following the GTS display, then change from normal mode to check mode.

CHECK FREEZE FRAME DATA

(a) If a DTC is present, select it in order to display its freeze frame data.

(b) Read the freeze frame data recorded when the DTC was stored.

CHECK TIME STAMP

HINT:

By checking Time Stamp, the time and order in which DTCs were stored in an ECU can be checked.

(a) Enter the following menus: Health Check.

(b) Perform the following steps when the data setting screen is displayed.

Selectable items:

Powertrain
Chassis
Body
Store All Data

(d) Select "Yes" when "Do you want to store time stamp data?" is displayed.

HINT:

If "Yes" is not selected, time stamp data will not be stored.

(e) After Health Check has completed, select "Time Stamp Data" to display the Time Stamp screen.

(f) Select the desired system from the drop-down list on the bottom of the Time Stamp screen.

(g) Check the order and time which DTCs were stored for the selected system.

CHECK FOR DTCS (SYSTEMS EXCEPT BATTERY ECU ASSEMBLY)

HINT:

The battery ECU assembly maintains communication with other computers, including the motor generator control ECU, the ECM, and hybrid Toyota Prius vehicle control ECU. Therefore, if the battery ECU assembly outputs a warning, it is necessary to check and record the DTCs of all systems.

(a) If DTCs are present, check the relevant systems.

HINT:

If DTCs for the CAN communication system are present in addition to other DTCs, first troubleshoot and repair any malfunctions in the CAN communication system.

CLEAR DTCS

NOTICE:

Clearing the DTCs will also clear the freeze frame data.

(a) Enter the following menus.

Powertrain > HV Battery > Trouble Codes

(b) Clear DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

OUTLINE

After clearing current DTCs using the GTS (or by disconnecting the cable from the negative (-) auxiliary battery terminal), permanent DTCs can be cleared when the universal trip is performed and then the system is determined to be normal for the relevant DTCs. The driving pattern to obtain a normal judgment is described under the "Confirmation Driving Pattern" for the respective DTC.
To clear permanent DTCs, all of the following conditions must be are met:
- There is a history that universal trip driving was performed.
- The Toyota Prius vehicle has been judged as normal for 2 trips. (Normal judgment does not have to be performed in 2 consecutive trip, but normal judgment should occur in the latest trip.)
- No malfunctions are detected.

CLEAR PERMANENT DTC

(a) Enter the following menus.

Powertrain > HV Battery > Trouble Codes

HINT:

If "YES" is displayed for the value of "PERMANENT" at the top right of the GTS screen, permanent DTCs are stored.

(b) Select the "Generic" tab.

HINT:

If permanent DTCs are not output, it is not necessary to continue this procedure.

(d) Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

Powertrain > HV Battery > Clear DTCs

NOTICE:

Do not clear the DTCs or disconnect the cable from the auxiliary battery terminal after performing this step.

(e) Perform the universal trip.

CAUTION:

When performing the driving pattern, obey all speed limits and traffic laws.

HINT:

The universal trip driving pattern and normal judgment procedure can be performed consecutively in the same driving cycle.

(1) Turn the ignition switch to ON (READY) and wait for 30 seconds or more.

(2) Drive the Toyota Prius vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more.

HINT:

It is possible to complete the drive pattern even if the vehicle decelerates to less than 40 km/h (25 mph) during the driving cycle provided that the vehicle is driven at 40 km/h (25 mph) or more for a total of 5 minutes.

(3) Allow 10 minutes or more to elapse from the time the ignition switch turned to ON (READY).

(f) Turn the ignition switch off and wait for 2 minutes or more.

(g) Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC.

HINT:

Do not turn the ignition switch off by mistake during this step.

(h) With ignition switch ON (READY) and wait for 5 seconds or more.

(i) Turn the ignition switch off and wait for 2 minutes or more.

(j) Turn the ignition switch to ON.

(k) Enter the following menus.

Powertrain > HV Battery > Trouble Codes

(l) Check that the permanent DTCs have been cleared.

HINT:

If permanent DTCs are not output, it is not necessary to continue this procedure.

(m) Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC.

HINT:

Do not turn the ignition switch off by mistake during this step.

(n) With ignition switch ON (READY) and wait for 5 seconds or more.

(o) Turn the ignition switch off and wait for 2 minutes or more.

(p) Turn the ignition switch to ON.

(q) Enter the following menus.

Powertrain > HV Battery > Trouble Codes

(r) Check that the permanent DTCs have been cleared.

HINT:

Permanent DTCs will be cleared if a normal judgment is obtained during 3 consecutive driving cycles with the MIL illuminated.
The permanent DTCs are cleared when the universal trip is completed.
If permanent DTCs are still present after the universal trip, turn the ignition switch off and wait for a while. Then, confirm that the permanent DTCs have been cleared.

Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA

HINT:

The battery ECU assembly records vehicle and driving condition information as freeze frame data the moment a DTC is stored. It can be used for estimating or duplicating the vehicle conditions that were present when the malfunction occurred. To confirm the details of the hybrid battery system, check the detailed information for the DTC information code in the Data List (INF code).

(a) Select a DTC in order to display its freeze frame data.

Powertrain > HV Battery > Clear DTCs

(b) Check the freeze frame information recorded with the DTC.

Powertrain > HV Battery

Tester Display
Toyota Prius Vehicle Speed
Target Engine Power
Engine Speed
Calculate Load
Coolant Temperature
Engine Run Time
Accelerator Position
Throttle Position Sensor No.1 Voltage %
Shift Position
Atmospheric Pressure
Ambient Temperature
BATT Voltage
Smoothed Value of BATT Voltage
Warmup Cycle Cleared DTC
Distance from DTC Cleared
Time after DTC Cleared
Running Time from MIL ON
Total Distance Traveled
Total Distance Traveled - Unit
MIL ON Run Distance
IGB Signal Status
IG2 Signal Status
Ready Signal
Ready ON Prevention Status
HV/EV Activate Condition
SMRG Control Status
SMRB Control Status
WIN Control Limit Power
WOUT Control Limit Power
A/C Consumption Power
EV Mode
Stop Light Switch
Airbag Status (Collision)
Airbag Status (Normal)
Generator Revolution
Target Generator Torque
Motor Revolution
Target Motor Torque
Request Motor Regenerative Brake Torque
Motor Regenerate Brake Execution Torque
Generator Carrier Frequency
Motor Carrier Frequency
VL-Voltage before Boosting
VH-Voltage after Boosting
Hybrid/EV Battery SOC
Delta SOC
Hybrid/EV Battery SOC just after IG-ON
Hybrid/EV Battery Maximum SOC
Hybrid/EV Battery Minimum SOC
Hybrid/EV Battery Voltage
Hybrid/EV Battery Current
Hybrid/EV Battery Current for Hybrid/EV Battery Control
Hybrid/EV Battery Current for Hybrid/EV Battery Control (Sub)
Hybrid/EV Battery Current Sensor Voltage for Hybrid/EV Battery Control
Hybrid/EV Battery Current Sensor Voltage for Hybrid/EV Battery Control (Sub)
Hybrid/EV Battery Current Sensor Power Supply Voltage
Hybrid/EV Battery Current Sensor Offset Learning Value
Hybrid/EV Battery Current Sensor Offset (High)
Hybrid/EV Battery Current Sensor Offset Learning Value (Sub)
Hybrid/EV Battery Current Sensor Offset (Sub)
Hybrid/EV Battery Control Mode
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 1
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 2
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 3
Hybrid/EV Battery Stack 1 Cell Average Voltage
Hybrid/EV Battery Stack 2 Cell Average Voltage
Hybrid/EV Battery Block 1 Cell Average Voltage
Hybrid/EV Battery Block 2 Cell Average Voltage
Hybrid/EV Battery Block 3 Cell Average Voltage
Hybrid/EV Battery Cell Maximum Voltage Up to 1 trip before
Hybrid/EV Battery Cell Minimum Voltage Up to 1 trip before
Hybrid/EV Battery Cell 1 Voltage
Hybrid/EV Battery Cell 2 Voltage
Hybrid/EV Battery Cell 3 Voltage
Hybrid/EV Battery Cell 4 Voltage
Hybrid/EV Battery Cell 5 Voltage
Hybrid/EV Battery Cell 6 Voltage
Hybrid/EV Battery Cell 7 Voltage
Hybrid/EV Battery Cell 8 Voltage
Hybrid/EV Battery Cell 9 Voltage
Hybrid/EV Battery Cell 10 Voltage
Hybrid/EV Battery Cell 11 Voltage
Hybrid/EV Battery Cell 12 Voltage
Hybrid/EV Battery Cell 13 Voltage
Hybrid/EV Battery Cell 14 Voltage
Hybrid/EV Battery Cell 15 Voltage
Hybrid/EV Battery Cell 16 Voltage
Hybrid/EV Battery Cell 17 Voltage
Hybrid/EV Battery Cell 18 Voltage
Hybrid/EV Battery Cell 19 Voltage
Hybrid/EV Battery Cell 20 Voltage
Hybrid/EV Battery Cell 21 Voltage
Hybrid/EV Battery Cell 22 Voltage
Hybrid/EV Battery Cell 23 Voltage
Hybrid/EV Battery Cell 24 Voltage
Hybrid/EV Battery Cell 25 Voltage
Hybrid/EV Battery Cell 26 Voltage
Hybrid/EV Battery Cell 27 Voltage
Hybrid/EV Battery Cell 28 Voltage
Hybrid/EV Battery Cell 29 Voltage
Hybrid/EV Battery Cell 30 Voltage
Hybrid/EV Battery Cell 31 Voltage
Hybrid/EV Battery Cell 32 Voltage
Hybrid/EV Battery Cell 33 Voltage
Hybrid/EV Battery Cell 34 Voltage
Hybrid/EV Battery Cell 35 Voltage
Hybrid/EV Battery Cell 36 Voltage
Hybrid/EV Battery Cell 37 Voltage
Hybrid/EV Battery Cell 38 Voltage
Hybrid/EV Battery Cell 39 Voltage
Hybrid/EV Battery Cell 40 Voltage
Hybrid/EV Battery Cell 41 Voltage
Hybrid/EV Battery Cell 42 Voltage
Hybrid/EV Battery Cell 43 Voltage
Hybrid/EV Battery Cell 44 Voltage
Hybrid/EV Battery Cell 45 Voltage
Hybrid/EV Battery Cell 46 Voltage
Hybrid/EV Battery Cell 47 Voltage
Hybrid/EV Battery Cell 48 Voltage
Hybrid/EV Battery Cell 49 Voltage
Hybrid/EV Battery Cell 50 Voltage
Hybrid/EV Battery Cell 51 Voltage
Hybrid/EV Battery Cell 52 Voltage
Hybrid/EV Battery Cell 53 Voltage
Hybrid/EV Battery Cell 54 Voltage
Hybrid/EV Battery Cell 55 Voltage
Hybrid/EV Battery Cell 56 Voltage
Hybrid/EV Battery Temperature 1
Hybrid/EV Battery Temperature 2
Hybrid/EV Battery Temperature 3
Hybrid/EV Battery Temperature 4
Hybrid/EV Battery Temperature 5
Hybrid/EV Battery Temperature 6
Hybrid/EV Battery Temperature Sensor Voltage 1
Hybrid/EV Battery Temperature Sensor Voltage 2
Hybrid/EV Battery Temperature Sensor Voltage 3
Hybrid/EV Battery Temperature Sensor Voltage 4
Hybrid/EV Battery Temperature Sensor Voltage 5
Hybrid/EV Battery Temperature Sensor Voltage 6
Hybrid/EV Battery Cooling Fan 1 Drive Request
Hybrid/EV Battery Cooling Fan 1 Drive Status
Hybrid/EV Battery Cooling Fan 1 Frequency
Hybrid/EV Battery Cooling Fan Low Speed Request
Hybrid/EV Battery Cooling Fan Intake Air Temperature 1
Hybrid/EV Battery Cooling Fan Intake Air Temperature Sensor Voltage 1

Vehicle Behavior Chart

VEHICLE BEHAVIOR CHART

VEHICLE BEHAVIOR CHART

(a) Vehicle behavior categorized by DTC

If a DTC is output, the vehicle behaves as follows.

DTC No.	Detection Item	Toyota Prius Vehicle Behavior when DTC is Output
P056014	System Voltage (BATT) Circuit Short to Ground or Open	Normal driving
P060629	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Signal Invalid	Reduced output power Engine not stopped
P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message	Reduced output power Engine not stopped
P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure	Reduced output power Engine not stopped
P060A87	Hybrid/EV Battery Energy Control Module Processor from Monitoring Processor Missing Message	Reduced output power Engine not stopped
P060B16	Hybrid/EV Battery Energy Control Module A/D Processing Circuit Voltage Below Threshold	Reduced output power Engine not stopped
P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure	Reduced output power Engine not stopped
P062F44	Hybrid/EV Battery Energy Control Module EEPROM Data Memory Failure	Normal driving
P062F46	Hybrid/EV Battery Energy Control Module EEPROM Calibration / Parameter Memory Failure	Normal driving
P0A1D94	Hybrid/EV Powertrain Control Module Unexpected Operation	READY OFF
P0A8100	Hybrid/EV Battery Cooling Fan 1 Control Circuit High	Normal driving
P0A8111	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground	Normal driving
P0A8115	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open	Normal driving
P0A814B	Hybrid/EV Battery Cooling Fan 1 Over Temperature	Normal driving
P0A8196	Hybrid/EV Battery Cooling Fan 1 Component Internal Failure	Normal driving
P0A8198	Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature	Normal driving
P0A9563	High Voltage Fuse Accumulated Load History	Normal driving
P0A9B11	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground	Normal driving
P0A9B15	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	Normal driving
P0A9B1C	Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range	Normal driving
P0A9B2A	Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range	Normal driving
P0AAC11	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground	Normal driving
P0AAC15	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	Normal driving
P0ABF11	Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground	Reduced output power Engine not stopped
P0ABF15	Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open	Reduced output power Engine not stopped
P0ABF28	Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure	Reduced output power Engine not stopped
P0ABF2A	Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range	Reduced output power Engine not stopped
P0AC511	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground	Normal driving
P0AC515	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open	Normal driving
P0AC51C	Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range	Normal driving
P0AC52A	Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range	Normal driving
P0ACA11	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground	Normal driving
P0ACA15	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open	Normal driving
P0ACA1C	Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range	Normal driving
P0ACA2A	Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range	Normal driving
P0AE811	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Ground	Normal driving
P0AE815	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Auxiliary Battery or Open	Normal driving
P0AE81C	Hybrid/EV Battery Temperature Sensor "D" Voltage Out of Range	Normal driving
P0AE82A	Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range	Normal driving
P0B0E11	Hybrid/EV Battery Current Sensor "B" Circuit Short to Ground	Reduced output power Engine not stopped
P0B0E15	Hybrid/EV Battery Current Sensor "B" Circuit Short to Auxiliary Battery or Open	Reduced output power Engine not stopped
P0B1362	Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure	Reduced output power Engine not stopped
P0BC211	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Ground	Normal driving
P0BC215	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Auxiliary Battery or Open	Normal driving
P0BC21C	Hybrid/EV Battery Temperature Sensor "E" Voltage Out of Range	Normal driving
P0BC22A	Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range	Normal driving
P0C3000	Hybrid/EV Battery State of Charge High	Greatly reduced output power Driving range is limited Engine always stopped
P0C3311	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Ground	Normal driving
P0C3315	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Auxiliary Battery or Open	Normal driving
P0C331C	Hybrid/EV Battery Temperature Sensor "F" Voltage Out of Range	Normal driving
P0C332A	Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range	Normal driving
P0E2D00	Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance	Reduced output power Engine not stopped
P1A001C	Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range	Reduced output power Engine not stopped
P1A6017	Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold	Reduced output power Engine not stopped
P1A6116	Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold	Reduced output power Engine not stopped
P1A8000	Hybrid/EV Battery Stack 1 Delta SOC High	Normal driving
P1A8100	Hybrid/EV Battery Stack 1 Delta SOC High (Extreme)	Reduced output power Engine not stopped
P1A8500	Hybrid/EV Battery Stack 2 Delta SOC High	Normal driving
P1A8600	Hybrid/EV Battery Stack 2 Delta SOC High (Extreme)	Reduced output power Engine not stopped
P1AFC00	System Voltage (AM) Circuit Voltage Below Threshold	READY OFF
P1AFD00	Flying Capacitor Circuit Voltage Out of Range	Reduced output power Engine not stopped
P1AFD1C	Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range	Reduced output power Engine not stopped
P1AFF00	Hybrid/EV Battery ECU Multiple Reset	READY OFF
P1C8549	High Voltage Power Resource Internal Electronic Failure	READY OFF
P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery	Reduced output power Engine not stopped
P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open	Reduced output power Engine not stopped
P1CC81E	Hybrid/EV Battery Stack 1 Voltage Difference Out of Range	Reduced output power Engine not stopped
P1CC91E	Hybrid/EV Battery Stack 2 Voltage Difference Out of Range	Reduced output power Engine not stopped
P300000	Hybrid/EV Battery Discharge Control Malfunction	READY OFF
P300016	Hybrid/EV Battery Control System Circuit Voltage Below Threshold	READY OFF
P30004B	Hybrid/EV Battery Control System Over Temperature	READY OFF
P301A1C	Hybrid Battery Stack 1 Cell Voltage Detection Voltage Out of Range	Reduced output power Engine not stopped
P306562	Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure	Normal driving
P306A62	Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure	Normal driving
P31AA17	Hybrid/EV Battery Stack 1 Cell Circuit Voltage Above Threshold	Reduced output power Engine not stopped
P31AB16	Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold	Reduced output power Engine not stopped
P31B300	Hybrid/EV Battery Voltage High	Reduced output power Engine not stopped
P31B400	Extreme Hybrid/EV Battery Charging Current	READY OFF
P31B549	Hybrid/EV Battery Internal Electronic Failure	READY OFF
P33DA1E	Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range	Reduced output power Engine not stopped
P33DB1E	Hybrid/EV Battery Stack 2 Circuit Resistance Out of Range	Reduced output power Engine not stopped
P33E01B	Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold	Reduced output power Engine not stopped
P33E11B	Hybrid/EV Battery Stack 2 Circuit Resistance Above Threshold	Reduced output power Engine not stopped
P33E600	Hybrid/EV Battery Stack 1 Capacity Decline	Normal driving
P33E700	Hybrid/EV Battery Stack 2 Capacity Decline	Normal driving
P33EC16	(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold	Reduced output power Engine not stopped
P33ED16	(Extreme) Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold	Reduced output power Engine not stopped
U010087	Lost Communication with ECM/PCM "A" Missing Message	Normal driving
U029387	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	Normal driving
U115087	Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message	Reduced output power Engine not stopped

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

Some Data List values may vary significantly if there are slight differences in the environment in which the vehicle is operating when measurements are obtained. Variations may also occur due to aging of the Toyota Prius vehicle. Due to these considerations, it is not always possible to provide definite values to be used for judgment of malfunctions. It is possible that a malfunction may be present even if measured values are within the reference range.
In the event of a problem with intricate symptoms, collect sample data from another Toyota Prius vehicle of the same model operating under identical conditions in order to reach an overall judgment by comparing all the items in the Data List.

(a) Check the results by referring to the following table.

HINT:

When reviewing Data List information, try to select only the specific Data List items related to the inspection being performed. If all items are selected when checking the Data List, the interval between updates for each item will be longer, resulting in delayed or incorrect data.
Using a custom list makes it possible to easily select smaller groups of related Data List items.
The following custom lists are available:
- All Data
- Hybrid/EV Battery
- Hybrid/EV Battery (Exc IR)
- Hybrid/EV Battery Temperature

Powertrain > HV Battery > Data List

Tester Display	Measurement Item	Diagnostic Note
Toyota Prius Vehicle Speed	Vehicle speed Vehicle stopped: 0 km/h (0 mph) While driving at a constant speed: No significant fluctuation	-
Target Engine Power	Requested engine power by hybrid Toyota Prius vehicle control ECU to ECM While driving with the engine running: Varies depending on vehicle operating conditions	-
Engine Speed	Engine speed Engine stopped: 0 rpm While engine running at a constant speed: No significant fluctuation	-
Calculate Load	Engine load (value increases in proportion to increase in load)	-
Coolant Temperature	Engine coolant temperature Cold start→Fully warmed up: Gradually rises After warming up: 75 to 100°C (167 to 212°F)	-
Engine Run Time	Elapsed time after starting engine Elapsed time after starting engine	Elapsed time from initial engine start until the ignition switch is turned off.
Accelerator Position	Accelerator pedal depressed angle Accelerator pedal depressed: Changes with accelerator pedal position	-
Throttle Position Sensor No.1 Voltage %	Throttle position sensor	Throttle valve status
Shift Position	Shift position of control Matches currently selected shift position: P, R, N, D or B	-
Atmospheric Pressure	Atmospheric pressure Constant: Atmosphere pressure	-
Ambient Temperature	Ambient air temperature Ignition switch ON: Same as ambient air temperature	-
BATT Voltage	Auxiliary battery voltage (Battery ECU assembly power source voltage) Constant: 11.00 to 15.00 V	-
Smoothed Value of BATT Voltage	Smoothed value of auxiliary battery voltage (Battery ECU assembly power source voltage) Constant: 11.00 to 15.00 V	-
Warmup Cycle Cleared DTC	The number of times the engine is warmed up after clearing DTCs MIL OFF, engine coolant temperature increases from below 22°C (71.6°F) before starting the engine to above 70°C (158°F) after starting the engine: Increases once	-
Distance from DTC Cleared	Drive distance after clearing DTCs	-
Time after DTC Cleared	Elapsed time after clearing DTCs	Time elapsed after DTCs are cleared (Not counted when the ignition switch is off).
MIL	MIL status	-
Running Time from MIL ON	Running time from MIL on	-
Total Distance Traveled	Drive total distance (for km)	-
Total Distance Traveled - Unit	Drive total distance unit	-
MIL ON Run Distance	Drive distance from MIL on	-
Number of Emission DTC	Emissions-related DTCs	-
IGB Signal Status	IGB signal status Ignition switch ON or ON (READY): ON	-
IG2 Signal Status	IG2 signal status Ignition switch ON or ON (READY): ON	-
Ready Signal	Ready signal status Ignition switch ON (READY): ON	-
Ready ON Prevention Status	Ready ON prevention status	-
HV/EV Activate Condition	Hybrid control system power source mode status Hybrid control system started using ignition switch: Normal Hybrid control system started using remote climate control function: Remote Climate Hybrid control system started using remote starter: Remote	-
SMRG Control Status	Commanded state of SMRG Ignition switch ON (READY): ON	-
SMRB Control Status	Commanded state of SMRB Ignition switch ON (READY): ON	-
WIN Control Limit Power	Power flowing to HV battery (Charging) (detected at battery ECU assembly) -27.40 kW or more	-
WOUT Control Limit Power	Power flowing from HV battery (Discharging) (detected at battery ECU assembly) 25.50 kW or less	-
A/C Consumption Power	A/C consumption power While the air conditioning system is operating: 0 to 5 kW	-
EV Mode	EV mode transition availability In EV mode: ON	-
Stop Light Switch	Stop light switch assembly condition Brake pedal depressed: ON	-
Airbag Status (Collision)	Airbag ECU assembly collision detection Collision detection by the airbag ECU assembly: ON	-
Airbag Status (Normal)	Control state of airbag ECU assembly When the airbag ECU assembly is operating normally: ON	-
Generator Revolution	Generator (MG1) speed (detected by resolver sensor) Generator (MG1) speed is set to obtain requested target engine speed During charge or discharge: Varies depending on Toyota Prius vehicle operating conditions	-
Target Generator Torque	Generator (MG1) torque request value During charge or discharge: Varies depending on vehicle operating conditions	-
Motor Revolution	Motor (MG2) speed (detected by resolver sensor) Motor (MG2) speed changes in proportion to Toyota Prius vehicle speed. Motor (MG2) speed is not influenced by accelerator pedal opening angle, engine speed or generator (MG1) speed. While driving: Varies depending on vehicle speed	-
Target Motor Torque	Motor (MG2) torque request value While driving: Varies depending on Toyota Prius vehicle operating conditions	-
Request Motor Regenerative Brake Torque	Requested motor (MG2) regenerative braking torque While braking: Varies depending on Toyota Prius vehicle operation conditions	When regenerative braking is being performed, current flows from the motor (MG2) to charge the HV battery and braking torque is generated. Electronically controlled brake system
Motor Regenerate Brake Execution Torque	Motor (MG2) regenerative braking execution torque While braking: Varies depending on Toyota Prius vehicle operation conditions	-
Generator Carrier Frequency	Generator Carrier Frequency	-
Motor Carrier Frequency	Motor (MG2) carrier frequency	-
VL-Voltage before Boosting	High voltage before it is boosted Ignition switch ON (READY): Practically the same as the HV battery voltage	-
VH-Voltage after Boosting	High voltage after it is boosted Engine revving up with shift lever in P: After boosted voltage to below approximately 600 V	-
Hybrid/EV Battery SOC	HV battery state of charge Primary calculated from charging and discharging amperage Constant: 0.0 to 100.0%	-
Delta SOC	Difference between maximum and minimum values of SOC READY indicator on, engine stopped and no electrical load: 0.0 to 60.0%	-
Hybrid/EV Battery SOC just after IG-ON	HV battery state of charge soon after ignition switch ON	-
Hybrid/EV Battery Maximum SOC	Maximum SOC after ignition switch turned to ON in current trip	-
Hybrid/EV Battery Minimum SOC	Minimum SOC after ignition switch turned to ON in current trip	-
Hybrid/EV Battery Voltage	HV battery voltage Ignition switch ON: 210.00 to 280.00 V	-
Hybrid/EV Battery Current	HV battery current Ignition switch ON: -4.00 to 4.00 A	-
Hybrid/EV Battery Current for Hybrid/EV Battery Control	HV battery current for hybrid battery control	-
Hybrid/EV Battery Current for Hybrid/EV Battery Control (Sub)	HV battery current for hybrid battery control (Sub)	-
Hybrid/EV Battery Current Sensor Voltage for Hybrid/EV Battery Control	HV battery current sensor voltage for hybrid battery control	-
Hybrid/EV Battery Current Sensor Voltage for Hybrid/EV Battery Control (Sub)	HV battery current sensor voltage for hybrid battery control (Sub)	-
Hybrid/EV Battery Current Sensor Power Supply Voltage	HV battery current sensor power supply voltage	-
Hybrid/EV Battery Current Sensor Offset Learning Value	HV battery current sensor offset learning value	-
Hybrid/EV Battery Current Sensor Offset (High)	HV battery current sensor offset (High)	-
Hybrid/EV Battery Current Sensor Offset Learning Value (Sub)	HV battery current sensor offset learning value (Sub)	-
Hybrid/EV Battery Current Sensor Offset (Sub)	HV battery current sensor offset (Sub)	-
Hybrid/EV Battery Control Mode	HV battery control mode	-
Hybrid/EV Battery Determination Signal 1	HV battery signal Normal condition: Hi	If "Lo" is displayed, an incorrect HV supply stack subassembly is installed.
Hybrid/EV Battery Determination Signal 2	HV battery signal Normal condition: Hi	If "Lo" is displayed, an incorrect HV supply stack subassembly is installed.
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 1	HV battery cell circuit open information for monitoring IC 1 Normal condition: 0	-
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 2	HV battery cell circuit open information for monitoring IC 2 Normal condition: 0	-
Hybrid/EV Battery Cell Circuit Open Information for Monitoring IC 3	HV battery cell circuit open information for monitoring IC 3 Normal condition: 0	-
Hybrid/EV Battery Stack 1 Cell Average Voltage	No. 1 HV supply stack sub-assembly cell average voltage Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Stack 2 Cell Average Voltage	No. 2 HV supply stack sub-assembly cell average voltage Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Block 1 Cell Average Voltage	Hybrid/EV battery block 1 cell average voltage Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Block 2 Cell Average Voltage	Hybrid/EV battery block 2 cell average voltage Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Block 3 Cell Average Voltage	Hybrid/EV battery block 3 cell average voltage Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell Maximum Voltage Up to 1 trip before	HV battery cell maximum voltage up to 1 trip before Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell Minimum Voltage Up to 1 trip before	HV battery cell minimum voltage up to 1 trip before Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 1 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 2 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 3 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 4 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 5 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 6 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 7 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 8 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 9 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 10 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 11 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 12 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 13 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 14 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 15 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 16 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 17 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 18 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 19 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 20 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 21 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 22 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 23 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 24 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 25 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 26 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 27 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 28 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 29 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 30 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 31 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 32 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 33 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 34 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 35 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 36 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 37 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 38 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 39 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 40 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 41 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 42 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 43 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 44 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 45 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 46 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 47 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 48 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 49 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 50 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 51 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 52 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 53 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 54 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 55 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 56 Voltage	HV battery cell voltage of each battery cell Ignition switch ON: 3.00 to 4.00 V	-
Hybrid/EV Battery Cell 1 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 2 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 3 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 4 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 5 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 6 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 7 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 8 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 9 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 10 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 11 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 12 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 13 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 14 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 15 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 16 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 17 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 18 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 19 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 20 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 21 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 22 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 23 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 24 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 25 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 26 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 27 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 28 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 29 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 30 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 31 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 32 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 33 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 34 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 35 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 36 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 37 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 38 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 39 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 40 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 41 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 42 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 43 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 44 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 45 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 46 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 47 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 48 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 49 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 50 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 51 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 52 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 53 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 54 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 55 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Cell 56 Internal Resistance	Internal resistance of each battery cell Always: 0.006 Ω or less	-
Hybrid/EV Battery Temperature 1	HV battery module temperature Toyota Prius Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature 2	HV battery module temperature Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature 3	HV battery module temperature Toyota Prius Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature 4	HV battery module temperature Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature 5	HV battery module temperature Toyota Prius Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature 6	HV battery module temperature Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Temperature Sensor Voltage 1	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Temperature Sensor Voltage 2	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Temperature Sensor Voltage 3	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Temperature Sensor Voltage 4	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Temperature Sensor Voltage 5	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Temperature Sensor Voltage 6	HV battery temperature sensor voltage 4.75 (-40°C (-40°F)) to 0.46 V (90°C (194°F))	-
Hybrid/EV Battery Cooling Fan	Battery cooling blower assembly operation mode 0: Ignition switch ON or ON (READY), and Battery cooling blower assembly stopped 1 to 6: Ignition switch ON or ON (READY), and Battery cooling blower assembly low speed to high speed 10: Battery cooling blower assembly in fail-safe mode due to battery cooling blower assembly malfunction (Refer to diagnostic procedure for related output hybrid system DTCs) 20: Battery cooling blower assembly in fail-safe mode due to HV battery malfunction (Refer to diagnostic procedure for related output hybrid system DTCs) 30: Battery cooling blower assembly stopped to protect parts	-
Hybrid/EV Battery Cooling Fan 1 Drive Request	Battery cooling blower assembly operation request	-
Hybrid/EV Battery Cooling Fan 1 Drive Status	Battery cooling blower assembly operation mode	-
Hybrid/EV Battery Cooling Fan 1 Frequency	Battery cooling blower assembly frequency Proportional to Battery cooling blower assembly speed	-
Hybrid/EV Battery Cooling Fan Low Speed Request	Battery cooling blower assembly Lo speed requested Constant: ON or OFF	-
Hybrid/EV Battery Cooling Fan Intake Air Temperature 1	HV battery intake air temperature Toyota Prius Vehicle left for 1 day: Same as ambient air temperature	-
Hybrid/EV Battery Cooling Fan Intake Air Temperature Sensor Voltage 1	HV battery intake air temperature sensor voltage	-

ACTIVE TEST

Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

NOTICE:

It is necessary to use caution, because if the tester DLC connector becomes disconnected or if a communication error occurs during an Active Test, the Toyota Prius vehicle could become inoperative (the READY light may go off).
After performing the Active Test, turn the ignition switch off before proceeding to the next step.

(a) According to the display on the GTS perform the appropriate Active Test.

Powertrain > HV Battery > Active Test

Tester Display	Measurement Item	Control Range	Restrict Condition	Diagnostic Note
Control the Hybrid/EV Battery Cooling Fan	To check operation of the cooling fan, and check if there is sufficient air flow	0 to 6	Ignition switch ON	Test Details Stops the cooling fan or changes air volume mode If the value of a cooling fan drive request from the Toyota Prius vehicle is larger than that used for the Active Test, Active Test is prohibited (remains prohibited during the same trip). Related Data List Hybrid/EV Battery Cooling Fan Hybrid/EV Battery Cooling Fan 1 Drive Request Hybrid/EV Battery Cooling Fan 1 Drive Status Hybrid/EV Battery Cooling Fan 1 Frequency Hybrid/EV Battery Cooling Fan Low Speed Request Hybrid/EV Battery Temperature 1 to 6 Hybrid/EV Battery Cooling Fan Intake Air Temperature 1

Registration / Initialization / Learning

REGISTRATION / INITIALIZATION / LEARNING

HIGH VOLTAGE FUSE ACCUMULATED LOAD HISTORY RESET

HINT:

If the HV battery junction block assembly has been replaced, make sure to perform "High Voltage Fuse Accumulated Load History Reset" and then clear the DTCs.

DTC P0A9563 will be stored again if do not perform "High Voltage Fuse Accumulated Load History Reset".

(a) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
High Voltage Fuse Accumulated Load History Reset

(b) According to the display on the GTS, perform High Voltage Fuse Accumulated Load History Reset and check that "High Voltage Fuse Accumulated Load History Reset is complete." is displayed.

NOTICE:

Performing High Voltage Fuse Accumulated Load History Reset takes approximately 20 to 25 minutes.
Make sure to confirm that "High Voltage Fuse Accumulated Load History Reset is complete." is displayed on GTS.
If "High Voltage Fuse Accumulated Load History Reset has failed. Do you want to try again?" is displayed on the GTS, perform the procedure again.

VEHICLE CONTROL HISTORY (RoB)

VEHICLE CONTROL HISTORY (RoB)

VEHICLE CONTROL HISTORY (RoB) (HYBRID BATTERY SYSTEM)

(a) Enter the following menus.

Powertrain > HV Battery > Utility

Tester Display
Toyota Prius Vehicle Control History (RoB)

HINT:

If any of the conditions in the "Cause" column are met, data related to the Vehicle Control History item "Ready ON Prevention", "Hybrid/EV Battery Cooling Performance Decrement" or "Limit to Charge / Discharge Control Value by Hybrid/EV Battery" will be stored in the battery ECU assembly.
When the Toyota Prius Vehicle Control History item "Ready ON Prevention" is stored, the vehicle condition will be as shown in the Symptom column.
There are unimplemented function codes depending on vehicle specification.

Vehicle Control History

Code	Tester Display	Measurement Item	Diagnostic Note
X0460	Hybrid/EV Battery Cooling Performance Decrement	History of poor HV battery cooling performance Toyota Prius Vehicle Control History Data: Hybrid/EV Battery Temperature 1 to 6 Hybrid/EV Battery Cooling Fan Intake Air Temperature 1 Countermeasures:	-
X0540	Ready ON Prevention	Incorrect HV battery is installed (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: Hybrid/EV Battery Determination Signal 1 Hybrid/EV Battery Determination Signal 2 "Hi" is displayed for both of these items when they are normal. If "Lo" is displayed for either item, the ignition switch cannot be turned to ON (READY) due to an incorrect HV supply stack sub-assembly having been installed. Countermeasures: Replace the HV supply stack sub-assembly with a correct one.	-
		Incorrect ECM is installed (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: Number of Hybrid Battery Mismatch Judgment with Engine ECU "0" is displayed for this item when it is normal. If a value of "3" or higher is displayed for this item, the ignition switch cannot be turned to ON (READY) due to an incorrect ECM having been installed. Countermeasures: Check the part number and replace the ECM with a correct one.	-
		Battery diagnosis request was ignored (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: Hybrid/EV Battery Check Status Light Request If a value of "6" or higher is displayed for this item and no other conditions are preventing the ignition switch from being turned to ON (READY), the ignition switch cannot be turned to ON (READY) due to Battery Diagnosis not being performed and the Toyota Prius vehicle being driven for a certain amount of time after "Have Traction Battery Inspected" was displayed on the multi-information display. Countermeasures: Perform Battery Diagnosis using the GTS.	-
		High voltage wire harness between HV supply stack sub-assemblies is disconnected (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: High Voltage Line between Stack Engaged If "ON" is displayed for this item, the ignition switch cannot be turned to ON (READY) as the high voltage wire harness connecting 2 or more HV supply stack sub-assemblies is disconnected. Countermeasures: Inspect the high voltage wire harnesses connecting the HV supply stack sub-assemblies.	-
		Excessive engine cranking requests when HV battery cannot be used (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: Number of Cranking when No Hybrid/EV Battery If a value higher than "15" is displayed for this item, the ignition switch cannot be turned to ON (READY) as engine cranking operation requests have exceeded a threshold when the HV battery could not be used. Countermeasures: Repair the malfunctions indicated by the output DTCs and clear the DTCs.	-
		Extremely low HV battery temperature judgment (The ignition switch does not turn to ON (READY).) Toyota Prius Vehicle Control History Data: Hybrid Battery Extremely Low Temperature Judgment If "ON" is displayed for this item, the ignition switch cannot be turned to ON (READY) as the temperature of the HV battery is extremely low. The values of "HV Battery Temperature 1 to 6" and "Hybrid/EV Battery Cooling Fan Intake Air Temperature 1" can be used as a reference. Countermeasures: Wait for the HV battery temperature to increase.	-
		High HV battery cell voltage (The ignition switch is slow to turn to ON (READY).) Toyota Prius Vehicle Control History Data: Hybrid/EV Battery Stack 1 Cell Maximum Voltage Hybrid/EV Battery Stack 2 Cell Maximum Voltage Countermeasures: Perform troubleshooting for any DTCs that are output.	-
		Low HV battery cell voltage (The ignition switch is slow to turn to ON (READY).) Toyota Prius Vehicle Control History Data: Hybrid/EV Battery Stack 1 Cell Minimum Voltage Hybrid/EV Battery Stack 2 Cell Minimum Voltage Countermeasures: Perform troubleshooting for any DTCs that are output.	-
X0570	Limit to Charge / Discharge Control Value by Hybrid/EV Battery	History of HV battery charge/discharge being restricted If the temperature of the HV battery becomes approximately 40°C (104°F) or higher due to high ambient temperature, continuous driving under high load, clogged hybrid battery intake duct, etc., the HV battery current will be restricted. In this case the value of WIN/WOUT will decrease and the engine will stop and start less frequently. Toyota Prius Vehicle Control History Data: WIN Control Limit Power WOUT Control Limit Power Hybrid/EV Battery Temperature 1 to 6 (Excessively high HV battery temperature: approximately 40°C (104°F) or higher) Hybrid/EV Battery Cooling Fan Intake Air Temperature 1 (If this value is high (approximately 38°C (100.4°F) or higher), due to high ambient temperature or high cabin temperature, the temperature of the HV battery may become high.) Countermeasures: Check for clogs in the hybrid battery intake duct. This Toyota Prius Vehicle Control History item may be stored if the temperature of the HV battery became high due to certain conditions, such as if the ambient temperature was high or the vehicle was driven continuously under high load. Explain to the customer that this is not a malfunction. If this Toyota Prius Vehicle Control History item is stored, perform the following inspections. Check the Vehicle Control History freeze frame data. Check for clogs in the hybrid battery intake duct. Inspect the HV battery cooling filter. Check the intake port of the HV battery cooling system for blockage, such as luggage, etc. After performing the above inspections, check the temperature of the HV battery in the Data List. If the temperature of the HV battery is high (approximately 40°C (104°F) or higher), stop the Toyota Prius vehicle, turn the air conditioning system on (Temperature: Lo, Blower speed: Max) and perform the Active Test "Control the Hybrid/EV Battery Cooling Fan". Check that the temperature of the HV battery decreases. This Vehicle Control History item may be stored if the temperature of the HV battery became high due to certain conditions, such as if the ambient temperature was high, cabin temperature was high or the Toyota Prius vehicle was driven continuously under high load (such as mountain driving or frequent acceleration/deceleration). Explain to the customer that this is not a malfunction.	-

System Voltage (BATT) Circuit Short to Ground or Open (P056014)

DESCRIPTION

Auxiliary battery power is supplied to the AM terminal of the battery ECU assembly in order to store DTCs and freeze frame data. Even if the ignition switch is turned off, back-up power is supplied.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P056014

System Voltage (BATT) Circuit Short to Ground or Open

Malfunction in the battery ECU assembly back-up power source circuit

(1 trip detection logic)

Wire harness or connector
Battery ECU assembly
Fuse

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0562

MONITOR DESCRIPTION

If a period of time has elapsed with a low voltage at the AM terminal of the battery ECU assembly, the battery ECU assembly will determine that a malfunction has occurred in the back-up power supply system, and it will set a DTC. The MIL will illuminate the next time the engine is started.

MONITOR STRATEGY

Related DTCs	P0562 (INF P056014): System voltage (battery energy control module)
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0562 (INF P056014) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 5 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

Be sure to check that the applicable DTC is output from the hybrid battery system.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK FUSE (ECU-B NO. 2)

Pre-procedure1

(a) Remove the ECU-B NO. 2 fuse from the power distribution box assembly.

Procedure1

(b) Check if there is an open circuit in the ECU-B NO. 2 fuse in the power distribution box assembly.

OK:

There is no open circuit in the ECU-B NO. 2 fuse.

Post-procedure1

REPLACE FUSE (ECU-B NO. 2)

2.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

HINT:

Click here

OK:

The connector is connected securely and there are no contact pressure problems.

Post-procedure1

CONNECT SECURELY

3.	CHECK HARNESS AND CONNECTOR (AM VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition	Result
R40-24 (AM) - R40-10 (GND)	Ignition switch off	11 to 14 V	V

Post-procedure1

(e) Disconnect the cable from the negative (-) auxiliary battery terminal.

(f) Reconnect the battery ECU assembly connector.

HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

Installation condition of fuse(s) (before removing fuse(s)) (power source circuit)
Fuse condition (before and after removing fuse(s)) (power source circuit)
Connection condition of connectors (power source circuit)
Wire harness condition (power source circuit)
Wire harness condition (GND circuit)

REPLACE BATTERY ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0A8100

Hybrid/EV Battery Cooling Fan 1 Control Circuit High

Both of the following conditions are met:

The HV battery temperature is high and the hybrid battery cooling fan speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
The HV battery temperature is high and the battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(1 trip detection logic)

Battery cooling blower assembly
Battery ECU assembly

Comes on

Master warning:

Comes on

HV Battery

SAE Code: P0A85

P0A8115

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

Both of the following conditions are met:

The speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
The battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(2 trip detection logic)

Battery cooling blower assembly
Battery ECU assembly

Comes on

Master warning:

Comes on

HV Battery

SAE Code: P0A85

HINT:

"Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly speed.
If the battery cooling blower assembly speed is excessively high, this DTC is stored.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the speed of the battery cooling blower assembly is higher than the target speed, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0A85 (INF P0A8100): Hybrid/EV Battery Cooling Fan 1 Control Circuit High P0A85 (INF P0A8115): Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open
Required sensors/components	Battery cooling blower assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle / 2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A85 (INF P0A8100) is not detected

DTC P0A85 (INF P0A8115) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Enter the following menus: Powertrain / HV Battery / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
Select fan mode 6 and operate the battery cooling blower assembly and wait for 60 seconds or more.[*2]
HINT:
- Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct or by operation sounds.
- [*1] to [*2]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A8111.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
P0A8100 or P0A8115 only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK BATTERY ECU ASSEMBLY (FREQUENCY)

Click here

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground (P0A8111,P0A814B)

DESCRIPTION

The battery cooling blower assembly speed is controlled by the battery ECU assembly. Power is supplied to the battery cooling blower assembly when the MREL terminal of the hybrid vehicle control ECU turns on the IGCT relay. The battery ECU assembly sends command signals (SI0) to the battery cooling blower assembly to adjust the fan speed to an appropriate speed for the HV battery temperature. The frequency (FP0) of the battery cooling blower assembly is sent to the battery ECU assembly as a monitor signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0A8111

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground

Both of the following conditions are met:

The speed calculated based on the battery cooling blower assembly output frequency is not within the target control speed range.
The battery cooling blower assembly speed is excessively low when a certain level of speed is requested (possibility of an open or short to ground in connected circuits, or motor locking).

(2 trip detection logic)

Battery cooling blower assembly
Battery ECU assembly
BATT FAN fuse
Wire harness or connector

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0A84

P0A814B

Hybrid/EV Battery Cooling Fan 1 Over Temperature

Both of the following conditions are met:

The HV battery temperature is high and the speed calculated based on the battery cooling blower assembly output frequency is not within the target control speed range.
The HV battery temperature is high and the battery cooling blower assembly speed is excessively low when a certain level of speed is requested (possibility of an open or short to ground in connected circuits, or motor locking).

(1 trip detection logic)

Battery cooling blower assembly
Battery ECU assembly
BATT FAN fuse
Wire harness or connector

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0A84

HINT:

"Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly speed.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the speed of the battery cooling blower assembly is lower than the target speed, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0A84 (INF P0A8111): Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground P0A84 (INF P0A814B): Hybrid/EV Battery Cooling Fan 1 Over Temperature
Required sensors/components	Battery cooling blower assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle / 2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A84 (INF P0A8111) is not detected

DTC P0A84 (INF P0A814B) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Enter the following menus: Powertrain / HV Battery / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
Select fan mode 1 and operate the battery cooling blower assembly and wait for 60 seconds or more.[*2]
HINT:
- Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct.
- [*1] to [*2]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

HINT:

As the battery cooling blower assembly speed is excessively low, there is a possibility of an open or short to ground in connected circuits, or motor locking.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
P0A8111 or P0A814B only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	PERFORM ACTIVE TEST USING GTS (CONTROL THE HYBRID/EV BATTERY COOLING FAN)

Pre-procedure1

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

(b) Select fan mode 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

Powertrain > HV Battery > Active Test

Tester Display
Control the Hybrid/EV Battery Cooling Fan

NOTICE:

If the Active Test cannot be performed, skip it and proceed to the next step to check if the fan operates and air is sucked. In accordance with fail-safe system operation, the battery ECU assembly sends a command to operate the battery cooling blower assembly.

Procedure1

(c) Check that the battery cooling blower assembly operates, air is sucked into the inlet duct and the operation sound is normal.

HINT:

The battery cooling blower assembly may not stop even when turning the cooling fan off in the "Control the Hybrid/EV Battery Cooling Fan" Active Test. This is due to HV system control and is not a malfunction.

OK:

The battery cooling blower assembly operates.

Post-procedure1

(d) Turn the ignition switch off.

GO TO STEP 7

3.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BATTERY COOLING BLOWER ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R43,R40) Click Connector(R43) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R43-4 (FP0) - R40-13 (FP0)	Ignition switch off	Below 1 Ω
R43-4 (FP0) or R40-13 (FP0) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

(e) Connect the cable to the negative (-) auxiliary battery terminal.

(f) Turn the ignition switch to ON.

(g) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R43,R40) Click Connector(R43) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R43-4 (FP0) or R40-13 (FP0) - Body ground	Ignition switch ON	Below 1 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

Check the condition of each wire harness and each connector between the battery ECU assembly connector and battery cooling blower assembly.

Post-procedure1

(h) Turn the ignition switch off.

(i) Disconnect the cable from the negative (-) auxiliary battery terminal.

(j) Reconnect the battery cooling blower assembly connector.

(k) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	READ VALUE USING GTS (HYBRID/EV BATTERY COOLING FAN 1 FREQUENCY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Powertrain > HV Battery > Clear DTCs

(d) Select each fan mode 1 to 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

Powertrain > HV Battery > Active Test

Active Test Display
Control the Hybrid/EV Battery Cooling Fan

Data List Display
Hybrid/EV Battery Cooling Fan 1 Frequency

NOTICE:

If the Active Test cannot turn off the battery cooling blower assembly, skip it and proceed to the next step to check the frequency value. In accordance with fail-safe system operation, the battery ECU assembly sends a command to operate the battery cooling fan assembly.

Procedure1

(e) While the cooling fan is operating, compare the value in the Data List (Hybrid/EV Battery Cooling Fan 1 Frequency) with the frequency value that was actually measured at the battery ECU assembly connector.

Specified Condition:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition
R43-4 (FP0) - R43-5 (GND0)	Battery cooling blower assembly operating (Active Test of cooling fan being performed)

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Result	Proceed to
Both of the value in the Data List (Hybrid/EV Battery Cooling Fan 1 Frequency) and the actual measured value at the battery ECU assembly connector are 0 Hz.	A
Other than above	B

*a	Component with harness connected (Battery Cooling Blower Assembly)

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

GO TO STEP 6

5.	CHECK BATTERY ECU ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery cooling blower assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-4 (FP0) - R43-5 (GND0)	Ignition switch ON	4.5 to 5.5 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery cooling blower assembly connector.

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

6.	CHECK BATTERY ECU ASSEMBLY (FREQUENCY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Powertrain > HV Battery > Clear DTCs

(d) Select each fan mode 1 to 6 in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

Powertrain > HV Battery > Active Test

Active Test Display
Control the Hybrid/EV Battery Cooling Fan

Data List Display
Hybrid/EV Battery Cooling Fan 1 Frequency

NOTICE:

Procedure1

Specified Condition:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-4 (FP0) - R43-5 (GND0)	Battery cooling blower assembly operating (Active Test of cooling fan being performed)	Difference between the value in the Data List (Hybrid/EV Battery Cooling Fan 1 Frequency) and the actual measured value at the battery ECU assembly connector is 10% or less.

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

HINT:

Compare the values in each fan mode 1 to 6. If the Active Test cannot be performed, compare the values only in the current fan mode.

Result:

Proceed to
OK
NG

*a	Component with harness connected (Battery Cooling Blower Assembly)

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

7.	CHECK FUSE (BATT FAN)

Pre-procedure1

(a) Remove the BATT FAN fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

Procedure1

(b) Measure the resistance of the BATT FAN fuse.

Standard Resistance:

Tester Connection	Condition	Specified Condition
BATT FAN fuse	Ignition switch off	Below 1 Ω

Post-procedure1

GO TO STEP 16

8.	CHECK HARNESS AND CONNECTOR (IGCT-MAIN NO. 2 RELAY - BATTERY COOLING BLOWER ASSEMBLY) (VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery cooling blower assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Clear the DTCs and freeze frame data.

Powertrain > Hybrid Control > Clear DTCs

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-1 (IG0) - R43-5 (GND0)	Ignition switch ON	11 to 14 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

Installation condition of fuse(s) (before removing fuse(s)) (IG circuit)
Fuse condition (before and after removing fuse(s)) (IG circuit)
Connection condition of connectors (IG circuit)
Wire harness condition (IG circuit)
Wire harness condition (GND circuit)

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery cooling blower assembly connector.

GO TO STEP 13

9.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BATTERY COOLING BLOWER ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.
Check that each connector between the battery ECU assembly and battery cooling blower assembly is not loose or disconnected.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.
Check the terminals of the connector for deformation and corrosion.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40,R43) Click Connector(R40) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R40-14 (SI0) - R43-2 (SI0)	Ignition switch off	Below 1 Ω
R40-14 (SI0) or R43-2 (SI0) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

NOTICE:

Make sure that each connector between the battery ECU assembly and battery cooling blower assembly is not loose or disconnected and its terminals are not deformed or corroded.

(e) Connect the cable to the negative (-) auxiliary battery terminal.

(f) Turn the ignition switch to ON.

(g) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R40,R43) Click Connector(R40) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R40-14 (SI0) or R43-2 (SI0) - Body ground	Ignition switch ON	Below 1 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

Check the condition of each wire harness and each connector between the battery ECU assembly connector and battery cooling blower assembly.

Post-procedure1

(h) Turn the ignition switch off.

(i) Disconnect the cable from the negative (-) auxiliary battery terminal.

(j) Reconnect the battery ECU assembly connector.

(k) Reconnect the battery cooling blower assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	CHECK BATTERY ECU ASSEMBLY

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-14 (SI0) - R40-10 (GND)	Ignition switch off	10 kΩ or higher

Result:

Proceed to
OK
NG

*a	Component without harness connected (Battery ECU Assembly)

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

11.	CHECK BATTERY ECU ASSEMBLY (SI0 VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-2 (SI0) - R43-5 (GND0)	Ignition switch ON	4.5 to 5.5 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Proceed to
OK
NG

*a	Component with harness connected (Battery Cooling Blower Assembly)

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE BATTERY COOLING BLOWER ASSEMBLY

12.	CHECK BATTERY COOLING BLOWER ASSEMBLY

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Powertrain > HV Battery > Clear DTCs

(d) Select each fan mode (1 to 6) in the "Control the Hybrid/EV Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

Powertrain > HV Battery > Active Test

Tester Display
Control the Hybrid/EV Battery Cooling Fan

NOTICE:

If the Active Test cannot turn off the battery cooling blower assembly, skip it and proceed to the next step to check the waveform. In accordance with fail-safe system operation, the battery ECU assembly sends a command to operate the battery cooling blower assembly.

Procedure1

(e) Connect an oscilloscope to the battery ECU assembly connector and check the waveform.

Item	Content
Tester Connection	R43-2 (SI0) - R43-5 (GND0)
Equipment Setting	10 V/DIV., 1 ms./DIV.
Condition	Battery cooling blower assembly operating (Active Test of cooling fan being performed)

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

HINT:

Perform this inspection with the battery ECU assembly connector connected.
The wave length will vary with the operating speed of the battery cooling blower assembly.

*a	Component with harness connected (Battery Cooling Blower Assembly)

*a	Waveform 1

Result	Proceed to
Normal (The pulse output of waveform 1)	A
No pulse generation	B

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

13.	CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BODY GROUND)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery cooling blower assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-5 (GND0) - Body ground	Ignition switch off	Below 1 Ω

Post-procedure1

(d) Connect the battery cooling blower assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BODY GROUND)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-10 (GND) - Body ground	Ignition switch off	Below 1 Ω

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.	CHECK HARNESS AND CONNECTOR (IGCT-MAIN NO. 2 RELAY - BATTERY COOLING BLOWER ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the IGCT-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

NOTICE:

Check the terminals of the relay for deformation and corrosion.

NOTICE:

Check that each connector between the IGCT-MAIN NO. 2 relay and battery cooling blower assembly is not loose or disconnected.
Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
5 (IGCT-MAIN NO. 2 relay holder) - R43-1 (IG0)	Ignition switch off	Below 1 Ω

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.
Check that each connector between the IGCT-MAIN NO. 2 relay and battery cooling blower assembly is not loose or disconnected.

Post-procedure1

(e) Reconnect the battery cooling blower assembly connector.

(f) Install the IGCT-MAIN NO. 2 relay.

REPLACE BATTERY ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.	CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BATTERY COOLING BLOWER ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the BATT FAN fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-1 (IG0) or 2 (BATT FAN fuse holder) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

Post-procedure1

(e) Reconnect the battery cooling blower assembly connector.

(f) Install the BATT FAN fuse.

GO TO STEP 19

17.	CHECK BATTERY COOLING BLOWER ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery cooling blower assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R43) Click Connector(R43)

Tester Connection	Condition	Specified Condition
R43-1 (IG0) - R43-5 (GND0) and Body ground	Ignition switch off	10 kΩ or higher

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

Result:

Proceed to
OK
NG

*a	Component without harness connected (Battery Cooling Blower Assembly)

Post-procedure1

(d) Reconnect the battery cooling blower assembly connector.

REPLACE FUSE (BATT FAN)

18.	REPLACE BATTERY COOLING BLOWER ASSEMBLY

HINT:

Click here

REPLACE FUSE (BATT FAN)

19.	REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE FUSE (BATT FAN)

Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0A8196

Hybrid/EV Battery Cooling Fan 1 Component Internal Failure

The battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*

*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.

(2 trip detection logic)

Wire harness or connector
Battery cooling blower assembly
Battery ECU assembly
No. 1 HV battery intake filter
No. 1 hybrid battery intake duct

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0A82

P0A8198

Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature

The HV battery temperature is high and the battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*

*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.

(1 trip detection logic)

Wire harness or connector
Battery cooling blower assembly
Battery ECU assembly
No. 1 HV battery intake filter
No. 1 hybrid battery intake duct

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0A82

HINT:

"Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly rotation speed.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the speed of the battery cooling blower assembly is outside the normal operating range, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0A82 (INF P0A8196): Hybrid/EV Battery Cooling Fan 1 Component Internal Failure P0A82 (INF P0A8198): Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature
Required sensors/components	Battery cooling blower assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle / 2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A82 (INF P0A8196) is not detected

DTC P0A82 (INF P0A8198) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Enter the following menus: Powertrain / HV Battery / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
Operate the battery cooling blower assembly in each fan mode, 1 through 6, for 60 seconds or more.[*2]
HINT:
- Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct.
- [*1] to [*2]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A8111.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
P0A8196 or P0A8198 only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK DUCT AND BLOWER

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check that the No. 1 HV battery intake filter, No. 1 hybrid battery intake duct and battery cooling blower assembly blower are not disconnected, damaged, or clogged with foreign matter.

OK:

The No. 1 HV battery intake filter, No. 1 hybrid battery intake duct and battery cooling blower assembly blower are not disconnected, damaged, or clogged with foreign matter.

*1	No. 1 HV Battery Intake Filter
*2	Battery Cooling Blower Assembly
*3	No. 1 Hybrid Battery Intake Duct

Post-procedure1

CORRECT THE PROBLEM

3.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BATTERY COOLING BLOWER ASSEMBLY)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BATTERY COOLING BLOWER ASSEMBLY)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK BATTERY ECU ASSEMBLY (GROUND SHORT CHECK)

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-14 (SI0) - R40-10 (GND)	Ignition switch off	10 kΩ or higher

Result:

Proceed to
OK
NG

*a	Component without harness connected (Battery ECU Assembly)

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

6.	READ VALUE USING GTS (HYBRID/EV BATTERY COOLING FAN 1 FREQUENCY)

Click here

Result	Proceed to
Both of the value in the Data List (Hybrid/EV Battery Cooling Fan 1 Frequency) and the actual measured value at the battery ECU assembly connector are 0 Hz.	A
Other than above	B

GO TO STEP 8

7.	CHECK BATTERY ECU ASSEMBLY

Click here

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

8.	CHECK BATTERY ECU ASSEMBLY (FREQUENCY)

Click here

REPLACE BATTERY COOLING BLOWER ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

High Voltage Fuse Accumulated Load History (P0A9563)

DESCRIPTION

The battery ECU assembly estimates the thermal load of the high voltage fuse. If the accumulated thermal load exceeds the threshold, the battery ECU assembly will store this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0A9563

High Voltage Fuse Accumulated Load History

Accumulated thermal load of the high voltage fuse estimated by the battery ECU assembly exceeds the threshold.

(1 trip detection logic)

HV battery junction block assembly

Does not come on

Master Warning:

Does not come on

HV Battery

SAE Code: P0A95

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 5 seconds or more.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

HINT:

If the HV battery junction block assembly has been replaced, make sure to perform "High Voltage Fuse Accumulated Load History Reset" and then clear the DTCs.

PROCEDURE

1.	REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

HINT:

Click here

2.	PERFORM UTILITY (HIGH VOLTAGE FUSE ACCUMULATED LOAD HISTORY RESET)

HINT:

Click here

3.	CLEAR DTC (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Post-procedure1

END

Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)

DESCRIPTION

The battery temperature sensors are provided at 6 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery ECU assembly uses the battery temperature sensors to detect the HV battery temperature. Based on the results of this detection, the battery ECU assembly controls the blower fan. (The blower fan starts when the HV battery temperature rises above a predetermined level.)

Temperature Sensor Identification Cross Reference Table:

DTC Title Sensor	Battery Temperature Sensor	GTS Display
A	0	1
B	1	2
C	2	3
D	3	4
E	4	5
F	5	6

HINT:

Use the reference table above to determine which battery temperature sensor corresponds to each DTC. For example, sensor A in the DTC title column is battery temperature sensor 0. This sensor is displayed as Hybrid/EV Battery Temperature 1 in the Data List.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P0A9B11	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0A9D
P0A9B15	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0A9E
P0AC511	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC7
P0AC515	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC8
P0ACA11	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0ACC
P0ACA15	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0ACD
P0AE811	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AEA
P0AE815	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AEB
P0BC211	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0BC4
P0BC215	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0BC5
P0C3311	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Ground	The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0C35
P0C3315	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Auxiliary Battery or Open	The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to B or open) and the detected temperature is lower than the specified value. (1 trip detection logic)	HV battery Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0C36

HINT:

After checking for the above DTCs, check the hybrid system Data List item "Hybrid/EV Battery Temperature" using the GTS.

Temperature Displayed

Malfunction

Below -45°C (-49°F)

Open or B short circuit

95°C (203°F) or more

GND short circuit
If the Toyota Prius vehicle as is left as is for 24 hours, the value of "Hybrid/EV Battery Temperature" will be almost the same as the ambient temperature.

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in a HV battery temperature sensor, the battery ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0A9D (INF P0A9B11), P0AC7 (INF P0AC511), P0ACC (INF P0ACA11), P0AEA (INF P0AE811), P0BC4 (INF P0BC211), P0C35 (INF P0C3311): Battery temperature sensor circuit malfunction (GND short) P0A9E (INF P0A9B15), P0AC8 (INF P0AC515), P0ACD (INF P0ACA15), P0AEB (INF P0AE815), P0BC5 (INF P0BC215), P0C36 (INF P0C3315): Battery temperature sensor circuit malfunction (open)
Required sensors/components	Battery temperature sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A9D (INF P0A9B11) is not detected

DTC P0AC7 (INF P0AC511) is not detected

DTC P0ACC (INF P0ACA11) is not detected

DTC P0BC4 (INF P0BC211) is not detected

DTC P0C35 (INF P0C3311) is not detected

DTC P0A9E (INF P0A9B15) is not detected

DTC P0AC8 (INF P0AC515) is not detected

DTC P0ACD (INF P0ACA15) is not detected

DTC P0AEB (INF P0AE815) is not detected

DTC P0BC5 (INF P0BC215) is not detected

DTC P0C36 (INF P0C3315) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 10 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0A9B11, P0A9B15, P0AC511, P0AC515, P0ACA11, P0ACA15, P0AE811, P0AE815, P0BC211, P0BC215, P0C3311 or P0C3315" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	READ VALUE USING GTS (HYBRID/EV BATTERY TEMPERATURE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the Data List.

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Temperature 1
Hybrid/EV Battery Temperature 2
Hybrid/EV Battery Temperature 3
Hybrid/EV Battery Temperature 4
Hybrid/EV Battery Temperature 5
Hybrid/EV Battery Temperature 6

HINT:

A malfunctioning sensor (battery temperature sensor 0, 1, 2, 3, or 5) can be determined by comparing the output temperature of the 6 battery temperature sensors.

Post-procedure1

3.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

HINT:

Click here

OK:

The connector is connected securely and there are no contact pressure problems.

Result:

Proceed to
OK
NG

Post-procedure1

CONNECT SECURELY

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P0A9B11, P0A9B15, P0AC511, P0AC515, P0ACA11 or P0ACA15" is also output.	A
"P0AE811, P0AE815, P0BC211, P0BC215, P0C3311 or P0C3315" is also output.	B

GO TO STEP 6

5.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Tester Connection:

Click Location & Routing(z12) Click Connector(z12)

Tester Connection	Battery Temperature Sensor
z12-44 (TB0) - z12-22 (GB0)	0
z12-21 (TB1) - z12-42 (GD0)	1
z12-43 (TB2) - z12-22 (GB0)	2

Standard Resistance:

Thermistor Temperature	Condition	Specified Condition
0 to 10°C (32 to 50°F)	Ignition switch off	17.68 to 27.83 kΩ
10 to 20°C (50 to 68°F)	Ignition switch off	11.94 to 18.25 kΩ
20 to 30°C (68 to 86°F)	Ignition switch off	8.21 to 12.24 kΩ
30 to 40°C (86 to 104°F)	Ignition switch off	5.73 to 8.41 kΩ
40 to 50°C (104 to 122°F)	Ignition switch off	4.08 to 5.91 kΩ

(d) Measure the resistance according to the value (s) in the table below.

Standard Resistance:

Click Location & Routing(z12) Click Connector(z12)

Tester Connection	Condition	Specified Condition
z12-44 (TB0) - Body ground and other terminals (except z12-22 (GB0) and z12-43 (TB2))	Ignition switch off	10 kΩ or higher
z12-22 (GB0) - Body ground and other terminals (except z12-44 (TB0) and z12-43 (TB2))	Ignition switch off	10 kΩ or higher
z12-21 (TB1) - Body ground and other terminals (except z12-42 (GD0))	Ignition switch off	10 kΩ or higher
z12-42 (GD0) - Body ground and other terminals (except z12-21 (TB1))	Ignition switch off	10 kΩ or higher
z12-43 (TB2) - Body ground and other terminals (except z12-44 (TB0) and z12-22 (GB0))	Ignition switch off	10 kΩ or higher

Post-procedure1

(e) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

6.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Tester Connection:

Click Location & Routing(z14) Click Connector(z14)

Tester Connection	Battery Temperature Sensor
z14-15 (TB3) - z14-38 (GB1)	3
z14-37 (TB4) - z14-13 (GD1)	4
z14-14 (TB5) - z14-38 (GB1)	5

Standard Resistance:

Thermistor Temperature	Condition	Specified Condition
0 to 10°C (32 to 50°F)	Ignition switch off	17.68 to 27.83 kΩ
10 to 20°C (50 to 68°F)	Ignition switch off	11.94 to 18.25 kΩ
20 to 30°C (68 to 86°F)	Ignition switch off	8.21 to 12.24 kΩ
30 to 40°C (86 to 104°F)	Ignition switch off	5.73 to 8.41 kΩ
40 to 50°C (104 to 122°F)	Ignition switch off	4.08 to 5.91 kΩ

(d) Measure the resistance according to the value (s) in the table below.

Standard Resistance:

Click Location & Routing(z14) Click Connector(z14)

Tester Connection	Condition	Specified Condition
z14-15 (TB3) - Body ground and other terminals (except z14-38 (GB1) and z14-14 (TB5))	Ignition switch off	10 kΩ or higher
z14-38 (GB1) - Body ground and other terminals (except z14-15 (TB3) and z14-14 (TB5))	Ignition switch off	10 kΩ or higher
z14-37 (TB4) - Body ground and other terminals (except z14-13 (GD1))	Ignition switch off	10 kΩ or higher
z14-13 (GD1) - Body ground and other terminals (except z14-37 (TB4))	Ignition switch off	10 kΩ or higher
z14-14 (TB5) - Body ground and other terminals (except z14-15 (TB3) and z14-38 (GB1))	Ignition switch off	10 kΩ or higher

Post-procedure1

(e) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range (P0A9B1C,P0AC51C,P0ACA1C,P0AE81C,P0BC21C,P0C331C)

DESCRIPTION

Refer to the description for DTC P0A9B11.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P0A9B1C	Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range	The performance of battery temperature sensor 0 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0A9C
P0AC51C	Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range	The performance of battery temperature sensor 1 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC6
P0ACA1C	Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range	The performance of battery temperature sensor 2 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0ACB
P0AE81C	Hybrid/EV Battery Temperature Sensor "D" Voltage Out of Range	The performance of battery temperature sensor 3 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AE9
P0BC21C	Hybrid/EV Battery Temperature Sensor "E" Voltage Out of Range	The performance of battery temperature sensor 4 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0BC3
P0C331C	Hybrid/EV Battery Temperature Sensor "F" Voltage Out of Range	The performance of battery temperature sensor 5 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0C34

HINT:

If the Toyota Prius vehicle as is left as is for 24 hours, the value of "Hybrid/EV Battery Temperature" will be almost the same as the ambient temperature.

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in the HV battery temperature sensor, the battery ECU assembly illuminates the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs	P0A9C (INF P0A9B1C), P0AC6 (INF P0AC51C), P0ACB (INF P0ACA1C), P0AE9 (INF P0AE81C), P0BC3 (INF P0BC21C), P0C34 (INF P0C331C): Battery temperature sensor malfunction (stuck)
Required sensors/components	Battery temperature sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A9C (INF P0A9B1C) is not detected

DTC P0AC6 (INF P0AC51C) is not detected

DTC P0ACB (INF P0ACA1C) is not detected

DTC P0AE9 (INF P0AE81C) is not detected

DTC P0BC3 (INF P0BC21C) is not detected

DTC P0C34 (INF P0C331C) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 10 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9B11.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0A9B1C, P0AC51C, P0ACA1C, P0AE81C, P0BC21C or P0C331C" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P0A9B1C, P0AC51C or P0ACA1C" is also output.	A
"P0AE81C, P0BC21C or P0C331C" is also output.	B

GO TO STEP 4

3.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2)

Click here

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

4.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5)

Click here

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range (P0A9B2A,P0AC52A,P0ACA2A,P0AE82A,P0BC22A,P0C332A,P306562,P306A62)

DESCRIPTION

Refer to the description for DTC P0A9B11.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P0A9B2A	Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range	The performance of battery temperature sensor 0 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0A9C
P0AC52A	Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range	The performance of battery temperature sensor 1 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC6
P0ACA2A	Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range	The performance of battery temperature sensor 2 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0ACB
P0AE82A	Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range	The performance of battery temperature sensor 3 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AE9
P0BC22A	Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range	The performance of battery temperature sensor 4 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0BC3
P0C332A	Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range	The performance of battery temperature sensor 5 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0C34
P306562	Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure	The performance of any battery temperature sensor (0 to 2) is abnormal and the difference in output between it and each other battery temperature sensor is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P3065
P306A62	Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure	The performance of any battery temperature sensor (3 to 5) is abnormal and the difference in output between it and each other battery temperature sensor is excessively large. (1 trip detection logic)	HV battery Battery ECU assembly	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P306A

HINT:

If the Toyota Prius vehicle as is left as is for 24 hours, the value of "Hybrid/EV Battery Temperature" will be almost the same as the ambient temperature.

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in the HV battery temperature sensor, the battery ECU assembly illuminates the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs	P0A9C (INF P0A9B2A), P0AC6 (INF P0AC52A), P0ACB (INF P0ACA2A), P0AE9 (INF P0AE82A), P0BC3 (INF P0BC22A), P0C34 (INF P0C332A): Battery temperature sensor malfunction (stuck) P3065 (INF P306562), P306A (INF P306A62): Battery temperature sensor malfunction (deviation)
Required sensors/components	Battery temperature sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle / 2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A9C (INF P0A9B2A) is not detected

DTC P0AC6 (INF P0AC52A) is not detected

DTC P0ACB (INF P0ACA2A) is not detected

DTC P0AE9 (INF P0AE82A) is not detected

DTC P0BC3 (INF P0BC22A) is not detected

DTC P0C34 (INF P0C332A) is not detected

DTC P3065 (INF P306562) is not detected

DTC P306A (INF P306A62) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

P0A9B2A, P0AC52A, P0ACA2A, P0AE82A, P0BC22A, P0C332A:

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Accelerator Position", "Hybrid/EV Battery Temperature 1 to 6" and "Hybrid/EV Battery Current" when ambient temperature is -10°C (14°F) or higher.[*1]
HINT:
- Check that the output of each battery temperature sensor varies.
- Check that the difference in output between each battery temperature sensor is not excessively large.
- [*1]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

P306562, P306A62:

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 10 seconds or more when the ambient temperature is -10°C (14°F) or higher.[*1]
HINT:
- Check that the difference in output between each battery temperature sensor is not large.
- [*1]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9B11.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0A9B2A, P0AC52A, P0ACA2A, P0AE82A, P0BC22A, P0C332A, P306562 or P306A62" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P0A9B2A, P0AC52A, P0ACA2A or P306562" is also output.	A
"P0AE82A, P0BC22A, P0C332A or P306A62" is also output.	B

GO TO STEP 4

3.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2)

Click here

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

4.	CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5)

Click here

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY

Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground (P0AAC11,P0AAC15)

DESCRIPTION

The inlet air temperature sensor (HV battery) is mounted on the HV battery. The resistance of the sensor varies in accordance with changes in the intake air temperature. The characteristics of the inlet air temperature sensor are the same as those of the battery temperature sensors (Click here ). The battery ECU assembly uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0AAC11

Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground

The inlet air temperature sensor output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value.

(1 trip detection logic)

No. 3 HV battery pack wire
Battery ECU assembly
Wire harness or connector

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P0AAE

P0AAC15

Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open

The inlet air temperature sensor output voltage is higher than the standard value (short to B or open) and the detected temperature is lower than the specified value.

(1 trip detection logic)

No. 3 HV battery pack wire
Battery ECU assembly
Wire harness or connector

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P0AAF

HINT:

After checking for the above DTCs, check the hybrid system Data List item "Hybrid/EV Battery Cooling Fan Intake Air Temperature 1" using the GTS.

Displayed Temperature	Malfunction
-45°C (-49°F) or less	Open or B short circuit
95°C (203°F) or more	GND short

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 5 seconds or more.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0AAC11 or P0AAC15" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

HINT:

Click here

OK:

The connector is connected securely and there are no contact problems.

Result:

Proceed to
OK
NG

Post-procedure1

CONNECT SECURELY

3.	CHECK INSTALLATION OF INLET AIR TEMPERATURE SENSOR

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Visually check the installation condition of the inlet air temperature sensor.

Result:

Result	Proceed to
The inlet air temperature sensor is installed in the correct location and its claws are engaged securely.	A
The claws of the inlet air temperature sensor are damaged.	B
The inlet air temperature sensor is not installed correctly, but its claws are not damaged.	C

Post-procedure1

REPLACE NO. 3 HV BATTERY PACK WIRE

INSTALL PARTS CORRECTLY

4.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value (s) in the table below.

Standard Voltage:

Click Location & Routing(R114) Click Connector(R114)

Tester Connection	Condition	Specified Condition
R114-2 - R114-1	Ignition switch ON	4.5 to 5.5 V

NOTICE:

Be sure not to damage or deform the terminal being inspected.

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connectors.

GO TO STEP 6

5.	CHECK NO. 3 HV BATTERY PACK WIRE (INLET AIR TEMPERATURE SENSOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R114) Click Connector(R114)

Tester Connection	Condition	Specified Condition
R114-1 - R114-2	Ignition switch off 0 to 10°C (32 to 50°F)	17.67 to 27.83 kΩ
	Ignition switch off 10 to 20°C (50 to 68°F)	11.94 to 18.25 kΩ
	Ignition switch off 20 to 30°C (68 to 86°F)	8.21 to 12.24 kΩ
	Ignition switch off 30 to 40°C (86 to 104°F)	5.73 to 8.41 kΩ
	Ignition switch off 40 to 50°C (104 to 122°F)	4.08 to 5.91 kΩ

Post-procedure1

(d) Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

REPLACE HV BATTERY

REPLACE NO. 3 HV BATTERY PACK WIRE

6.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 3 HV BATTERY PACK WIRE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

Procedure1

(d) Measure the resistance according to the value (s) in the table below.

Standard Resistance (Check for Open):

Click Location & Routing(R40,R114) Click Connector(R40) Click Connector(R114)

Tester Connection	Condition	Specified Condition
R40-1 (TC0) - R114-2	Ignition switch off	Below 1 Ω
R40-2 (GC0) - R114-1	Ignition switch off	Below 1 Ω

Standard Resistance (Check for Short):

Click Location & Routing(R40,R114) Click Connector(R40) Click Connector(R114)

Tester Connection	Condition	Specified Condition
R40-1 (TC0) or R114-2 - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-2 (GC0) or R114-1 - Body ground and other terminals	Ignition switch off	10 kΩ or higher

Post-procedure1

(e) Reconnect the battery ECU assembly connector.

(f) Reconnect the No. 3 HV battery pack wire (inlet air temperature sensor) connector.

REPLACE BATTERY ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P0B0E11,P0B0E15,P1CBB12,P1CBB14)

DESCRIPTION

A battery current sensor, which is mounted on the positive cable side of each HV battery junction block assembly, detects the current flowing to or from the battery pack. The battery current sensor sends a voltage, which varies between 0 and 5 V in proportion to the amperage, to the IB0 terminal of the battery ECU assembly. Similarly, it sends a voltage, which varies between 0 and 5 V in inverse proportion to the amperage, to the IB1 terminal of the battery ECU assembly. When the voltage at the IB0 terminal is below 2.92 V and the voltage at the IB1 terminal is above 2.08 V, this indicates that the HV battery is being discharged. Additionally, Meanwhile, when the voltage at of the IB0 terminal is above 2.92 V and the voltage at of the IB1 terminal is below 2.08 V, this indicates that the HV battery is being charged. The battery ECU assembly determines the charging and discharging amount of the HV battery based on the voltages input to the IB0 terminal and IB1 terminal and calculates the SOC of the HV battery through the accumulated amperage.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P0ABF11	Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground	The battery current sensor output voltage (IB0) is excessively low. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC1
P0ABF15	Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open	The battery current sensor output voltage (IB0) is excessively high. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0AC2
P0B0E11	Hybrid/EV Battery Current Sensor "B" Circuit Short to Ground	The battery current sensor output voltage (IB1) is excessively low. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0B10
P0B0E15	Hybrid/EV Battery Current Sensor "B" Circuit Short to Auxiliary Battery or Open	The battery current sensor output voltage (IB1) is excessively high. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P0B11
P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery	Power source voltage (VIB) of the battery current sensor is excessively high. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P1CBD
P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open	Power source voltage (VIB) of the battery current sensor is excessively low. (1 trip detection logic)	HV battery junction block assembly Battery ECU assembly Wire harness or connector	Comes on	Master warning: Comes on	HV Battery	A	SAE Code: P1CBC

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in the battery current sensor, the battery ECU assembly illuminates the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs	P0AC1 (INF P0ABF11): Hybrid Battery Pack Current Sensor "A" Circuit Low P0AC2 (INF P0ABF15): Hybrid Battery Pack Current Sensor "A" Circuit High P0B10 (INF P0B0E11): Hybrid Battery Pack Current Sensor "B" Circuit Low P0B11 (INF P0B0E15): Hybrid Battery Pack Current Sensor "B" Circuit High P1CBD (INF P1CBB12): Hybrid/EV Battery Pack Current Sensor "A" Power Supply Circuit High P1CBC (INF P1CBB14): Hybrid/EV Battery Pack Current Sensor "A" Power Supply Circuit Low
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0AC1 (INF P0ABF11) is not detected

DTC P0AC2 (INF P0ABF15) is not detected

DTC P0B10 (INF P0B0E11) is not detected

DTC P0B11 (INF P0B0E15) is not detected

DTC P1CBD (INF P1CBB12) is not detected

DTC P1CBC (INF P1CBB14) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 5 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0ABF11, P0ABF15, P0B0E11, P0B0E15, P1CBB12 or P1CBB14" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK BATTERY ECU ASSEMBLY (IGCT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-12 (IGCT) - R40-10 (GND)	Ignition switch ON	11 to 14 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

HINT:

As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

Installation condition of fuse(s) (before removing fuse(s)) (IG circuit)
Fuse condition (before and after removing fuse(s)) (IG circuit)
Connection condition of connectors (IG circuit)
Wire harness condition (IG circuit)
Wire harness condition (GND circuit)

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

3.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the resistance according to the value (s) in the tables below.

Standard Resistance (Check for Open):

Click Location & Routing(R40,R47) Click Connector(R40) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R40-6 (IB1) - R47-2 (IB1)	Ignition switch off	Below 1 Ω
R40-18 (GIB) - R47-3 (GIB)	Ignition switch off	Below 1 Ω
R40-5 (IB0) - R47-4 (IB0)	Ignition switch off	Below 1 Ω
R40-17 (VIB) - R47-1 (VIB)	Ignition switch off	Below 1 Ω

Standard Resistance (Check for Short):

Click Location & Routing(R40,R47) Click Connector(R40) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R40-6 (IB1) or R47-2 (IB1) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-18 (GIB) or R47-3 (GIB) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-5 (IB0) or R47-4 (IB0) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-17 (VIB) or R47-1 (VIB) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

Post-procedure1

(e) Reconnect the HV battery junction block assembly connector.

(f) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

4.	CHECK BATTERY ECU ASSEMBLY (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-1 (VIB) - R47-3 (GIB)	Ignition switch ON	4.5 to 5.5 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Proceed to
OK
NG

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

GO TO STEP 13

5.	CHECK BATTERY ECU ASSEMBLY (GIB - GND)

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value (s) in the tables below.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-10 (GND) - R40-18 (GIB)	Ignition switch off	Below 1 Ω

Result:

Proceed to
OK
NG

*a	Component without harness connected (Battery ECU Assembly)

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

6.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB1))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-2 (IB1) - R47-3 (GIB)	Ignition switch ON	2.02 to 2.14 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Proceed to
OK
NG

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

GO TO STEP 11

7.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB0))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-4 (IB0) - R47-3 (GIB)	Ignition switch ON	2.86 to 2.98 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Proceed to
OK
NG

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE BATTERY ECU ASSEMBLY

8.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB0))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition
R47-4 (IB0) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Result	Proceed to
0.3 to 4.7 V	A
Below 0.3 V	B
More than 4.7 V	C

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

GO TO STEP 10

9.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB0))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-4 (IB0) - R47-3 (GIB)	Ignition switch ON	4.5 to 5.5 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery current sensor connector to the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

10.	CHECK BATTERY ECU ASSEMBLY (VIB - IB0)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-1 (VIB) - R47-4 (IB0)	Ignition switch off	10 kΩ or higher

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

Post-procedure1

(d) Reconnect the battery current sensor connector to the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

11.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB1))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition
R47-2 (IB1) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Result:

Result	Proceed to
0.3 to 4.7 V	A
Below 0.3 V	B
More than 4.7 V	C

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

Post-procedure1

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

GO TO STEP 14

12.	CHECK BATTERY ECU ASSEMBLY (BATTERY CURRENT SENSOR OUTPUT VOLTAGE (IB1))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-2 (IB1) - R47-3 (GIB)	Ignition switch ON	4.6 to 5.4 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery current sensor connector to the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

13.	CHECK BATTERY ECU ASSEMBLY (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

Procedure1

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-1 (VIB) - R47-3 (GIB)	Ignition switch ON	4.6 to 5.4 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

Post-procedure1

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery current sensor connector to the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

14.	CHECK BATTERY ECU ASSEMBLY (VIB - IB1)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery current sensor connector from the HV battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R47-1 (VIB) - R47-2 (IB1)	Ignition switch off	10 kΩ or higher

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

Post-procedure1

(d) Reconnect the battery current sensor connector from the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure (P0ABF28)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0ABF28

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure

The offset value of the battery current sensor is excessively large.

(1 trip detection logic)

HV battery junction block assembly
Battery ECU assembly
Wire harness or connector

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0AC0

HINT:

Make sure to perform Current Sensor Offset Learning after replacing a battery current sensor.
This DTC may be output if Current Sensor Offset Learning has not been completed.

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in a battery current sensor, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0AC0 (INF P0ABF28): Current sensor malfunction
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0AC0 (INF P0ABF28) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
Turn the ignition switch off and wait for 2 minutes or more.[*2]
Turn the ignition switch to ON.[*3]
With ignition switch ON and wait for 10 seconds or more.[*4]
HINT:

[*1] to [*4]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0ABF11.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0ABF28" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P062F46	Hybrid/EV Battery Energy Control Module EEPROM Calibration / Parameter Memory Failure
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

(d) Measure the resistance according to the value(s) in the tables below.

Standard Resistance (Check for Open):

Click Location & Routing(R40,R47) Click Connector(R40) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R40-6 (IB1) - R47-2 (IB1)	Ignition switch off	Below 1 Ω
R40-18 (GIB) - R47-3 (GIB)	Ignition switch off	Below 1 Ω
R40-5 (IB0) - R47-4 (IB0)	Ignition switch off	Below 1 Ω
R40-17 (VIB) - R47-1 (VIB)	Ignition switch off	Below 1 Ω

Standard Resistance (Check for Short):

Click Location & Routing(R40,R47) Click Connector(R40) Click Connector(R47)

Tester Connection	Condition	Specified Condition
R40-6 (IB1) or R47-2 (IB1) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-18 (GIB) or R47-3 (GIB) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-5 (IB0) or R47-4 (IB0) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
R40-17 (VIB) or R47-1 (VIB) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

Post-procedure1

(e) Reconnect the battery current sensor connector to the HV battery junction block assembly.

(f) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB0))

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Using a toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Tester Connection
R47-1 (VIB) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Be sure to set the toyota electrical tester to 40 V when performing this test.

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

(e) Using a toyota electrical tester set to 4 V, measure the IB0 voltage according to the value(s) in the table below.

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Tester Connection
R47-4 (IB0) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Be sure to set the toyota electrical tester to 4 V when performing this test.

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

(f) Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:

IB0 voltage - 0.584 X VIB Voltage = less than 0.060 V

IB0 voltage - 0.584 X VIB Voltage = -0.060 V or higher

Result	Proceed to
Within the specified range above	A
Other than above	B

Post-procedure1

(g) Turn the ignition switch off.

(h) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

4.	CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB1))

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

Procedure1

(d) Using a toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Tester Connection
R47-1 (VIB) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Be sure to set the toyota electrical tester to 40 V when performing this test.

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

(e) Using a toyota electrical tester set to 4 V, measure the IB1 voltage according to the value(s) in the table below.

Click Location & Routing(R47) Click Connector(R47)

Tester Connection	Tester Connection
R47-2 (IB1) - R47-3 (GIB)	Ignition switch ON

NOTICE:

Be sure to set the toyota electrical tester to 4 V when performing this test.

*a	Component with harness connected (HV Battery Junction Block Assembly (Battery Current Sensor))

(f) Compare the measured values of the IB1 terminal voltage and VIB terminal voltage using the following formula:

Condition
IB1 voltage - 0.416 X VIB Voltage = less than 0.060 V
IB1 voltage - 0.416 X VIB Voltage = -0.060 V or higher

Result	Proceed to
Within the specified range above.	A
Other than above	B

Post-procedure1

(g) Turn the ignition switch off.

(h) Disconnect the cable from the negative (-) auxiliary battery terminal.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

5.	REPLACE BATTERY ECU ASSEMBLY

HINT:

Click here

CLEAR DTC

(a) Clear the DTCs.

Powertrain > HV Battery > Clear DTCs

7.	SIMULATION TEST

(a) Perform the simulation test.

(1) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

(2) Turn the ignition switch off and wait for 2 minutes or more.

(3) Turn the ignition switch to ON and wait for 10 seconds or more.

8.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
DTCs are not output.	A
P0ABF28 is also output.	B

Post-procedure1

END

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0ABF2A

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range

The hybrid battery voltage is changing but the hybrid battery current and battery current sensor output do not change.

(1 trip detection logic)

HV battery junction block assembly
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0AC0

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in a battery current sensor, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0AC0 (INF P0ABF2A): Current sensor malfunction
Required sensors/components	Battery current sensor / Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0AC0 (INF P0ABF2A) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 5 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0ABF2A" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P0ABF11	Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground
	P0ABF15	Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open
	P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery
	P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	READ VALUE USING GTS (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) Turn the ignition switch to ON.

NOTICE:

Do not turn the ignition switch to ON (READY).

Procedure1

(b) Check the voltage of each "Battery Cell Vol" of "Hybrid/EV Battery Cell 1 to 56 Voltage" in the Data List with the ignition switch ON.

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Cell 1 Voltage
Hybrid/EV Battery Cell 2 Voltage
Hybrid/EV Battery Cell 3 Voltage
Hybrid/EV Battery Cell 4 Voltage
Hybrid/EV Battery Cell 5 Voltage
Hybrid/EV Battery Cell 6 Voltage
Hybrid/EV Battery Cell 7 Voltage
Hybrid/EV Battery Cell 8 Voltage
Hybrid/EV Battery Cell 9 Voltage
Hybrid/EV Battery Cell 10 Voltage
Hybrid/EV Battery Cell 11 Voltage
Hybrid/EV Battery Cell 12 Voltage
Hybrid/EV Battery Cell 13 Voltage
Hybrid/EV Battery Cell 14 Voltage
Hybrid/EV Battery Cell 15 Voltage
Hybrid/EV Battery Cell 16 Voltage
Hybrid/EV Battery Cell 17 Voltage
Hybrid/EV Battery Cell 18 Voltage
Hybrid/EV Battery Cell 19 Voltage
Hybrid/EV Battery Cell 20 Voltage
Hybrid/EV Battery Cell 21 Voltage
Hybrid/EV Battery Cell 22 Voltage
Hybrid/EV Battery Cell 23 Voltage
Hybrid/EV Battery Cell 24 Voltage
Hybrid/EV Battery Cell 25 Voltage
Hybrid/EV Battery Cell 26 Voltage
Hybrid/EV Battery Cell 27 Voltage
Hybrid/EV Battery Cell 28 Voltage
Hybrid/EV Battery Cell 29 Voltage
Hybrid/EV Battery Cell 30 Voltage
Hybrid/EV Battery Cell 31 Voltage
Hybrid/EV Battery Cell 32 Voltage
Hybrid/EV Battery Cell 33 Voltage
Hybrid/EV Battery Cell 34 Voltage
Hybrid/EV Battery Cell 35 Voltage
Hybrid/EV Battery Cell 36 Voltage
Hybrid/EV Battery Cell 37 Voltage
Hybrid/EV Battery Cell 38 Voltage
Hybrid/EV Battery Cell 39 Voltage
Hybrid/EV Battery Cell 40 Voltage
Hybrid/EV Battery Cell 41 Voltage
Hybrid/EV Battery Cell 42 Voltage
Hybrid/EV Battery Cell 43 Voltage
Hybrid/EV Battery Cell 44 Voltage
Hybrid/EV Battery Cell 45 Voltage
Hybrid/EV Battery Cell 46 Voltage
Hybrid/EV Battery Cell 47 Voltage
Hybrid/EV Battery Cell 48 Voltage
Hybrid/EV Battery Cell 49 Voltage
Hybrid/EV Battery Cell 50 Voltage
Hybrid/EV Battery Cell 51 Voltage
Hybrid/EV Battery Cell 52 Voltage
Hybrid/EV Battery Cell 53 Voltage
Hybrid/EV Battery Cell 54 Voltage
Hybrid/EV Battery Cell 55 Voltage
Hybrid/EV Battery Cell 56 Voltage

NOTICE:

Select "Hybrid/EV Battery Cell 1 to 56 Voltage" only. (Do not select any other Data List items.)

Specified Condition:

Any "Hybrid/EV Battery Cell Voltage" changes by 0.05 V or more, 60 seconds after the ignition switch is turned to ON. (The difference between the maximum and minimum voltage is 0.05 V or more.)

Result	Proceed to
The change in voltage of any "Hybrid/EV Battery Cell Voltage" is 0.05 V or more.	A
Other than above	B

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure (P0B1362)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0B1362

Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure

A battery current sensor is malfunctioning.*

(1 trip detection logic)

HV battery junction block assembly
Battery ECU assembly
Wire harness or connector

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0B13

*: The difference in output of the main and sub battery current sensors is large.

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in a battery current sensor, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0B13 (INF P0B1362): Current sensor malfunction
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0B13 (INF P0B1362) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0B1362" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

HINT:

Click here

4.	CLEAR DTC (HV BATTERY)

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

(b) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

5.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
DTCs are not output.	A
P0B1362 is also output.	B

Post-procedure1

END

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery State of Charge High (P0C3000)

DESCRIPTION

The battery ECU assembly monitors the operation of the hybrid battery system and will store this DTC if it detects a malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0C3000

Hybrid/EV Battery State of Charge High

Even though charging of the HV battery is prohibited due to the SOC reaching the upper limit, charging continues to be performed due to a hybrid control system malfunction.

(1 trip detection logic)

Hybrid Toyota Prius vehicle control ECU
HV battery junction block assembly

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P0C30

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Apply the parking brake and secure the wheels using chocks.
Turn the ignition switch to ON (READY), move the shift lever to D and the Toyota Prius vehicle stopped, firmly depress the brake pedal and accelerator pedal. The engine rpm will increase as well as the value of Data List item "Hybrid/EV Battery SOC". If the value drops, release the accelerator pedal and then depress it again to continue charging.
Check that charging stops when the Data List item "Hybrid/EV Battery SOC" reaches the upper limit.
Enter the following menus: Powertrain / HV battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AA649.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0C3000" only is output.	A
DTCs except "P0C3000" of hybrid battery system are output.	B
DTCs except "P0C3000" of hybrid control system are output.	C

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK FREEZE FRAME DATA (READY SIGNAL, SMR CONTROL STATUS, HYBRID/EV BATTERY CURRENT)

Pre-procedure1

(a) None.

Procedure1

(b) Read the freeze frame data of DTC P0C3000.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
OFF is displayed for "Ready Signal", "SMRB Control Status" and "SMRG Control Status" and -0.5 A or less is displayed for "Hybrid/EV Battery Current".	A
Other than above	B

HINT:

As the ignition switch ON state may cause the DTC to be stored, freeze frame data is used to judge the cause of the DTC output.

Post-procedure1

REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

3.	INSPECT HV BATTERY JUNCTION BLOCK ASSEMBLY (SMRB, SMRG)

CAUTION:

Be sure to wear insulated gloves.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the high voltage cable connectors from the HV battery junction block assembly.

NOTICE:

Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.

Component without harness connected

(HV Battery Junction Block Assembly)

Standard Resistance (SMRB):

Click Location & Routing(e13,z15) Click Connector(e13) Click Connector(z15)

Tester Connection	Condition	Specified Condition	Result
e13-1 (CBI) - z15-1 ( )	Ignition switch off	10 kΩ or higher	kΩ

Procedure1

(d) Measure the resistance according to the value(s) in the table below.

Component without harness connected

(HV Battery Junction Block Assembly)

Standard Resistance (SMRG):

Click Location & Routing(e12,z16) Click Connector(e12) Click Connector(z16)

Tester Connection	Condition	Specified Condition	Result
e12-1 (CEI) - z16-1 (-)	Ignition switch off	10 kΩ or higher	kΩ

Post-procedure1

(e) Reconnect the high voltage cable connectors to the HV battery junction block assembly.

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

4.	PERFORM INITIALIZATION (CURRENT SENSOR OFFSET LEARNING)

Pre-procedure1

(a) Turn the ignition switch to ON (READY).

Procedure1

(b) Perform a road test.

NOTICE:

Accelerate/decelerate gently. Avoid rapid acceleration/deceleration.

(1) Drive the Toyota Prius vehicle with the value of Data List item "Hybrid/EV Battery Current" between -50 A to 50 A.

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Current

HINT:

Distance and driving time are not specified.

(d) Turn the ignition switch to ON.

(e) Check that the value of "Hybrid/EV Battery Current" is between - 0.5 A and 0.5 A with the ignition switch ON.

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Current

NOTICE:

If the value is outside the specified range, perform the road test again.
This DTC may be output if Current Sensor Offset Learning has not been completed.

HINT:

If the ignition switch is ON and value of "Hybrid/EV Battery Current" is between - 0.5 A and 0.5 A, current sensor offset learning has been completed.
Even if the current sensor offset learning is not complete, the current sensor value will be corrected by repeating the road test a maximum of 7 times.

Post-procedure1

(f) Turn the ignition switch off.

END

Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance (P0E2D00)

DESCRIPTION

The battery ECU assembly detects the voltage of each HV battery cell. The battery ECU assembly monitors its internal HV battery cell voltage detection circuits to detect malfunctions. If the battery ECU assembly detects a malfunction it will store this DTC.

HINT:

If this DTC is output, it will be necessary to replace the battery ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P0E2D00

Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance

The battery ECU assembly detects a malfunction of its internal HV battery cell voltage detection circuits.

(1 trip detection logic)

Battery ECU assembly
HV battery

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P0E2D

MONITOR DESCRIPTION

The battery ECU assembly monitors its internal HV battery cell voltage detection circuits to detect malfunctions. If the battery ECU assembly detects a malfunction, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0E2D (INF P0E2D00): Internal control module hybrid/EV battery monitor performance
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0E2D (INF P0E2D00) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With the Toyota Prius vehicle stopped and the shift position in P, turn the ignition switch to ON and wait for at least 70 seconds. [*1]
Turn the ignition switch to ON (READY) and without depressing the accelerator pedal, and while depressing the brake pedal, change the shift position to D and wait for 1 minute. (Step A)[*2]
Drive the Toyota Prius vehicle 0.5 m (1.6 ft.) forward and perform step A.[*3]
Drive the vehicle another 0.5 m (1.6 ft.) forward and perform step A. Repeat this procedure 5 times (minimum total driving distance: 2 m (6.6 ft.)).[*4]
HINT:

[*1] to [*4]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P0E2D00" only is output, or DTCs except the ones in the table below are also output.	A
"P0E2D00" and "P1C8449" are output.	B
DTCs of hybrid battery system in the table below are output.	C
DTCs of hybrid control system in the table below are output.	D

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P1A001C	Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range
	P301A1C	Hybrid Battery Stack 1 Cell Voltage Detection Voltage Out of Range
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

HINT:

Click here

OK:

The connectors are connected securely and there are no contact problems.

Result:

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Either connector z12 and z14 was not connected securely	The terminals are damaged or corroded	C

Post-procedure1

CONNECT SECURELY

REPLACE HV BATTERY

3.	READ VALUE USING GTS (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the Data List.

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Cell 1 Voltage
Hybrid/EV Battery Cell 2 Voltage
Hybrid/EV Battery Cell 3 Voltage
Hybrid/EV Battery Cell 4 Voltage
Hybrid/EV Battery Cell 5 Voltage
Hybrid/EV Battery Cell 6 Voltage
Hybrid/EV Battery Cell 7 Voltage
Hybrid/EV Battery Cell 8 Voltage
Hybrid/EV Battery Cell 9 Voltage
Hybrid/EV Battery Cell 10 Voltage
Hybrid/EV Battery Cell 11 Voltage
Hybrid/EV Battery Cell 12 Voltage
Hybrid/EV Battery Cell 13 Voltage
Hybrid/EV Battery Cell 14 Voltage
Hybrid/EV Battery Cell 15 Voltage
Hybrid/EV Battery Cell 16 Voltage
Hybrid/EV Battery Cell 17 Voltage
Hybrid/EV Battery Cell 18 Voltage
Hybrid/EV Battery Cell 19 Voltage
Hybrid/EV Battery Cell 20 Voltage
Hybrid/EV Battery Cell 21 Voltage
Hybrid/EV Battery Cell 22 Voltage
Hybrid/EV Battery Cell 23 Voltage
Hybrid/EV Battery Cell 24 Voltage
Hybrid/EV Battery Cell 25 Voltage
Hybrid/EV Battery Cell 26 Voltage
Hybrid/EV Battery Cell 27 Voltage
Hybrid/EV Battery Cell 28 Voltage
Hybrid/EV Battery Cell 29 Voltage
Hybrid/EV Battery Cell 30 Voltage
Hybrid/EV Battery Cell 31 Voltage
Hybrid/EV Battery Cell 32 Voltage
Hybrid/EV Battery Cell 33 Voltage
Hybrid/EV Battery Cell 34 Voltage
Hybrid/EV Battery Cell 35 Voltage
Hybrid/EV Battery Cell 36 Voltage
Hybrid/EV Battery Cell 37 Voltage
Hybrid/EV Battery Cell 38 Voltage
Hybrid/EV Battery Cell 39 Voltage
Hybrid/EV Battery Cell 40 Voltage
Hybrid/EV Battery Cell 41 Voltage
Hybrid/EV Battery Cell 42 Voltage
Hybrid/EV Battery Cell 43 Voltage
Hybrid/EV Battery Cell 44 Voltage
Hybrid/EV Battery Cell 45 Voltage
Hybrid/EV Battery Cell 46 Voltage
Hybrid/EV Battery Cell 47 Voltage
Hybrid/EV Battery Cell 48 Voltage
Hybrid/EV Battery Cell 49 Voltage
Hybrid/EV Battery Cell 50 Voltage
Hybrid/EV Battery Cell 51 Voltage
Hybrid/EV Battery Cell 52 Voltage
Hybrid/EV Battery Cell 53 Voltage
Hybrid/EV Battery Cell 54 Voltage
Hybrid/EV Battery Cell 55 Voltage
Hybrid/EV Battery Cell 56 Voltage

Result	Proceed to
There are two or more HV battery cell of 1.6 V or less in the data list item "Hybrid/EV Battery Cell 1 to 56 Voltage"	A
Other than above	B

Post-procedure1

GO TO STEP 5

4.	REPLACE BATTERY ECU ASSEMBLY

HINT:

Click here

REPLACE HV BATTERY

5.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P0E2D00 and make a note if the value of any is 1.6 V or less.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
The value of any of the freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 28 Voltage" is 1.6 V or less.	A
The value of any of the freeze frame data items "Hybrid/EV Battery Cell 29 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" is 1.6 V or less.	B
Other than above	C

Post-procedure1

GO TO STEP 9

REPLACE BATTERY ECU ASSEMBLY

6.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 1 - 28)

CAUTION:

Be sure to wear insulated gloves and protective goggles.
Disconnect only the connector corresponding to the HV battery cell to be checked. Do not disconnect the other connectors.

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of each HV battery cell.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

Procedure1

HINT:

Measure the voltage of the HV battery cells whose value in the freeze frame data was 1.6 V or less only.

HV Battery Cell	Tester Connection	Condition
1	z12-19 (GA0) - z12-41 (VA1)	Always
2	z12-41 (VA1) - z12-18 (VA2)	Always
3	z12-18 (VA2) - z12-40 (VA3)	Always
4	z12-40 (VA3) - z12-17 (VA4)	Always
5	z12-17 (VA4) - z12-39 (VA5)	Always
6	z12-39 (VA5) - z12-16 (VA6)	Always
7	z12-16 (VA6) - z12-38 (VA7)	Always
8	z12-38 (VA7) - z12-13 (VA8)	Always
9	z12-13 (VA8) - z12-35 (VA9)	Always
10	z12-35 (VA9) - z12-12 (VA10)	Always
11	z12-12 (VA10) - z12-34 (VA11)	Always
12	z12-34 (VA11) - z12-11 (VA12)	Always
13	z12-11 (VA12) - z12-33 (VA13)	Always
14	z12-33 (VA13) - z12-10 (VA14)	Always
15	z12-10 (VA14) - z12-32 (VA15)	Always
16	z12-32 (VA15) - z12-9 (VA16)	Always
17	z12-9 (VA16) - z12-31 (VA17)	Always
18	z12-31 (VA17) - z12-8 (VA18)	Always
19	z12-8 (VA18) - z12-30 (VA19)	Always
20	z12-30 (VA19) - z12-7 (VA20)	Always
21	z12-29 (GA1) - z12-6 (VA21)	Always
22	z12-6 (VA21) - z12-28 (VA22)	Always
23	z12-28 (VA22) - z12-5 (VA23)	Always
24	z12-5 (VA23) - z12-27 (VA24)	Always
25	z12-27 (VA24) - z12-4 (VA25)	Always
26	z12-4 (VA25) - z12-26 (VA26)	Always
27	z12-26 (VA26) - z12-3 (VA27)	Always
28	z12-3 (VA27) - z12-23 (VA28)	Always

CAUTION:

Make sure not to cross the electrodes of an electrical tester measurement terminals.

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.

Result	Proceed to
The voltage between the terminals is 1.6 V or less.	A
Other than above	B

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

7.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance.

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Only inspect the terminals of the battery ECU assembly which correspond to the HV battery cells which measured 1.6 V or less in the previous step.

Component without harness connected

(Battery ECU Assembly)

Standard Resistance:

HV Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
1	z12-19 (GA0) (-) - z12-41 (VA1) ( )	Always	50 kΩ or more
2	z12-41 (VA1) (-) - z12-18 (VA2) ( )	Always	50 kΩ or more
3	z12-18 (VA2) (-) - z12-40 (VA3) ( )	Always	50 kΩ or more
4	z12-40 (VA3) (-) - z12-17 (VA4) ( )	Always	50 kΩ or more
5	z12-17 (VA4) (-) - z12-39 (VA5) ( )	Always	50 kΩ or more
6	z12-39 (VA5) (-) - z12-16 (VA6) ( )	Always	50 kΩ or more
7	z12-16 (VA6) (-) - z12-38 (VA7) ( )	Always	50 kΩ or more
8	z12-38 (VA7) (-) - z12-13 (VA8) ( )	Always	50 kΩ or more
9	z12-13 (VA8) (-) - z12-35 (VA9) ( )	Always	50 kΩ or more
10	z12-35 (VA9) (-) - z12-12 (VA10) ( )	Always	50 kΩ or more
11	z12-12 (VA10) (-) - z12-34 (VA11) ( )	Always	50 kΩ or more
12	z12-34 (VA11) (-) - z12-11 (VA12) ( )	Always	50 kΩ or more
13	z12-11 (VA12) (-) - z12-33 (VA13) ( )	Always	50 kΩ or more
14	z12-33 (VA13) (-) - z12-10 (VA14) ( )	Always	50 kΩ or more
15	z12-10 (VA14) (-) - z12-32 (VA15) ( )	Always	50 kΩ or more
16	z12-32 (VA15) (-) - z12-9 (VA16) ( )	Always	50 kΩ or more
17	z12-9 (VA16) (-) - z12-31 (VA17) ( )	Always	50 kΩ or more
18	z12-31 (VA17) (-) - z12-8 (VA18) ( )	Always	50 kΩ or more
19	z12-8 (VA18) (-) - z12-30 (VA19) ( )	Always	50 kΩ or more
20	z12-30 (VA19) (-) - z12-7 (VA20) ( )	Always	50 kΩ or more
21	z12-29 (GA1) (-) - z12-6 (VA21) ( )	Always	50 kΩ or more
22	z12-6 (VA21) (-) - z12-28 (VA22) ( )	Always	50 kΩ or more
23	z12-28 (VA22) (-) - z12-5 (VA23) ( )	Always	50 kΩ or more
24	z12-5 (VA23) (-) - z12-27 (VA24) ( )	Always	50 kΩ or more
25	z12-27 (VA24) (-) - z12-4 (VA25) ( )	Always	50 kΩ or more
26	z12-4 (VA25) (-) - z12-26 (VA26) ( )	Always	50 kΩ or more
27	z12-26 (VA26) (-) - z12-3 (VA27) ( )	Always	50 kΩ or more
28	z12-3 (VA27) (-) - z12-23 (VA28) ( )	Always	50 kΩ or more

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.
Read the resistance after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance of the battery ECU assembly.

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

Post-procedure1

REPLACE HV BATTERY

8.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

9.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 29 - 56)

CAUTION:

Be sure to wear insulated gloves and protective goggles.
Disconnect only the connector corresponding to the HV battery cell to be checked. Do not disconnect the other connectors.

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of each HV battery cell.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

Procedure1

HINT:

Measure the voltage of the HV battery cells whose value in the freeze frame data was 1.6 V or less only.

HV Battery Cell	Tester Connection	Condition
29	z14-22 (VAD) - z14-44 (VA29)	Always
30	z14-44 (VA29) - z14-21 (VA30)	Always
31	z14-21 (VA30) - z14-43 (VA31)	Always
32	z14-43 (VA31) - z14-20 (VA32)	Always
33	z14-20 (VA32) - z14-42 (VA33)	Always
34	z14-42 (VA33) - z14-19 (VA34)	Always
35	z14-19 (VA34) - z14-16 (VA35)	Always
36	z14-35 (GA2) - z14-12 (VA36)	Always
37	z14-12 (VA36) - z14-34 (VA37)	Always
38	z14-34 (VA37) - z14-11 (VA38)	Always
39	z14-11 (VA38) - z14-33 (VA39)	Always
40	z14-33 (VA39) - z14-10 (VA40)	Always
41	z14-10 (VA40) - z14-32 (VA41)	Always
42	z14-32 (VA41) - z14-9 (VA42)	Always
43	z14-9 (VA42) - z14-31 (VA43)	Always
44	z14-31 (VA43) - z14-8 (VA44)	Always
45	z14-8 (VA44) - z14-30 (VA45)	Always
46	z14-30 (VA45) - z14-7 (VA46)	Always
47	z14-7 (VA46) - z14-29 (VA47)	Always
48	z14-29 (VA47) - z14-6 (VA48)	Always
49	z14-6 (VA48) - z14-28 (VA49)	Always
50	z14-28 (VA49) - z14-5 (VA50)	Always
51	z14-5 (VA50) - z14-27 (VA51)	Always
52	z14-27 (VA51) - z14-4 (VA52)	Always
53	z14-4 (VA52) - z14-26 (VA53)	Always
54	z14-26 (VA53) - z14-3 (VA54)	Always
55	z14-3 (VA54) - z14-25 (VA55)	Always
56	z14-25 (VA55) - z14-23 (VA56)	Always

CAUTION:

Make sure not to cross the electrodes of an electrical tester measurement terminals.

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.

Result	Proceed to
The voltage between the terminals is 1.6 V or less.	A
Other than above	B

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

10.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance.

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Only inspect the terminals of the battery ECU assembly which correspond to the HV battery cells which measured 1.6 V or less in the previous step.

Component without harness connected

(Battery ECU Assembly)

Standard Resistance:

HV Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
29	z14-22 (VAD) (-) - z14-44 (VA29) ( )	Always	50 kΩ or more
30	z14-44 (VA29) (-) - z14-21 (VA30) ( )	Always	50 kΩ or more
31	z14-21 (VA30) (-) - z14-43 (VA31) ( )	Always	50 kΩ or more
32	z14-43 (VA31) (-) - z14-20 (VA32) ( )	Always	50 kΩ or more
33	z14-20 (VA32) (-) - z14-42 (VA33) ( )	Always	50 kΩ or more
34	z14-42 (VA33) (-) - z14-19 (VA34) ( )	Always	50 kΩ or more
35	z14-19 (VA34) (-) - z14-16 (VA35) ( )	Always	50 kΩ or more
36	z14-35 (GA2) (-) - z14-12 (VA36) ( )	Always	50 kΩ or more
37	z14-12 (VA36) (-) - z14-34 (VA37) ( )	Always	50 kΩ or more
38	z14-34 (VA37) (-) - z14-11 (VA38) ( )	Always	50 kΩ or more
39	z14-11 (VA38) (-) - z14-33 (VA39) ( )	Always	50 kΩ or more
40	z14-33 (VA39) (-) - z14-10 (VA40) ( )	Always	50 kΩ or more
41	z14-10 (VA40) (-) - z14-32 (VA41) ( )	Always	50 kΩ or more
42	z14-32 (VA41) (-) - z14-9 (VA42) ( )	Always	50 kΩ or more
43	z14-9 (VA42) (-) - z14-31 (VA43) ( )	Always	50 kΩ or more
44	z14-31 (VA43) (-) - z14-8 (VA44) ( )	Always	50 kΩ or more
45	z14-8 (VA44) (-) - z14-30 (VA45) ( )	Always	50 kΩ or more
46	z14-30 (VA45) (-) - z14-7 (VA46) ( )	Always	50 kΩ or more
47	z14-7 (VA46) (-) - z14-29 (VA47) ( )	Always	50 kΩ or more
48	z14-29 (VA47) (-) - z14-6 (VA48) ( )	Always	50 kΩ or more
49	z14-6 (VA48) (-) - z14-28 (VA49) ( )	Always	50 kΩ or more
50	z14-28 (VA49) (-) - z14-5 (VA50) ( )	Always	50 kΩ or more
51	z14-5 (VA50) (-) - z14-27 (VA51) ( )	Always	50 kΩ or more
52	z14-27 (VA51) (-) - z14-4 (VA52) ( )	Always	50 kΩ or more
53	z14-4 (VA52) (-) - z14-26 (VA53) ( )	Always	50 kΩ or more
54	z14-26 (VA53) (-) - z14-3 (VA54) ( )	Always	50 kΩ or more
55	z14-3 (VA54) (-) - z14-25 (VA55) ( )	Always	50 kΩ or more
56	z14-25 (VA55) (-) - z14-23 (VA56) ( )	Always	50 kΩ or more

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.
Read the resistance after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance of the battery ECU assembly.

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

Post-procedure1

REPLACE HV BATTERY

11.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold (P1A6017,P31AA17)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the voltage of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1A6017

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold

The voltage of any cell of the No. 2 HV supply stack sub-assembly has exceeded the threshold.

(1 trip detection logic)

HV battery
Hybrid Toyota Prius vehicle control ECU

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A60

P31AA17

Hybrid/EV Battery Stack 1 Cell Circuit Voltage Above Threshold

The voltage of any cell of the No. 1 HV supply stack sub-assembly has exceeded the threshold.

(1 trip detection logic)

HV battery
Hybrid Toyota Prius vehicle control ECU

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P31AA

MONITOR DESCRIPTION

If the battery ECU assembly detects that the voltage of a HV battery cell is excessively high, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P1A60 (INF P1A6017), P31AA (INF P31AA17): Cell voltage high
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1A60 (INF P1A6017) is not detected

DTC P31AA (INF P31AA17) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
P0C3000 or P31B300 is not output	A
P0C3000 or P31B300 is output	B

Post-procedure1

REPLACE HV BATTERY

2.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold (P1A6116,P31AB16)

DESCRIPTION

If the voltage of an HV battery cell is lower than the threshold for a certain amount of time, the battery ECU assembly will interpret this as a malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1A6116

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold

The voltage of any cell of the No. 2 HV supply stack sub-assembly has decreased excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A61

P31AB16

Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold

The voltage of any cell of the No. 1 HV supply stack sub-assembly has decreased excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P31AB

CAUTION:

Do not charge the HV battery using the THS charger if DTC P1A6116 or P31AB16 is output.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the voltage of any HV battery cell has decreased excessively, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P1A61 (INF P1A6116), P31AB (INF P31AB16): Cell voltage low
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1A61 (INF P1A6116) is not detected

DTC P31AB (INF P31AB16) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1A6116 or P31AB16" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P1A6116" is also output.	A
"P31AB16" is also output.	B

GO TO STEP 7

3.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

4.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 29 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P1A6116 and make a note if the value of any is 1.6 V or less.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

5.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 29 - 56)

Click here

Result	Proceed to
The voltage between the terminals is 1.6 V or less.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

6.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE HV BATTERY

REPLACE BATTERY ECU ASSEMBLY

7.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

8.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 28 Voltage" for DTC P31AB16 and make a note if the value of any is 1.6 V or less.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

9.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 1 - 28)

Click here

Result	Proceed to
The voltage between the terminals is 1.6 V or less.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

10.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE HV BATTERY

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery Stack 1 Delta SOC High (P1A8000,P1A8500)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the difference in capacity of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1A8000

Hybrid/EV Battery Stack 1 Delta SOC High

The difference in capacity of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value.

(2 trip detection logic)

HV battery
HV battery junction block assembly
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A80

P1A8500

Hybrid/EV Battery Stack 2 Delta SOC High

The difference in capacity of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value.

(2 trip detection logic)

HV battery
HV battery junction block assembly
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A85

HINT:

These DTCs can be stored after clearing the DTCs and driving the Toyota Prius vehicle for approximately 12 minutes.
In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
- Make sure the air intake port for HV battery is not blocked.
- Make sure there are no gaps between the connecting parts of the ducts.
- Clean the No. 1 HV battery intake filter.
- Clear the DTCs to reset the learning values even if no DTCs are stored.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the difference in capacity of each HV battery cell exceeds the specified value, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P1A80 (INF P1A8000), P1A85 (INF P1A8500): Battery cell malfunction
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1A80 (INF P1A8000) is not detected

DTC P1A85 (INF P1A8500) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 12 minutes.[*1]
(As 2 trip detection logic is used, check for DTCs including pending DTCs.)

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1A8000 or P1A8500" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P0ABF28	Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure
	P0ABF2A	Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range
	P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery
	P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open
	P1CC81E	Hybrid/EV Battery Stack 1 Voltage Difference Out of Range
	P1CC91E	Hybrid/EV Battery Stack 2 Voltage Difference Out of Range
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation
	P0B231C	Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range
	P1C2D62	Hybrid/EV Battery "A" Voltage Sensor/ Boosting Converter Voltage Sensor "A" Signal Compare Failure

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P1A8000" is also output.	A
"P1A8500" is also output.	B

GO TO STEP 7

3.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 28 Voltage" for DTC P1A8000 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

4.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

5.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

6.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

7.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 29 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P1A8500 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

8.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

9.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

10.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Stack 1 Delta SOC High (Extreme) (P1A8100,P1A8600)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the difference in capacity of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1A8100

Hybrid/EV Battery Stack 1 Delta SOC High (Extreme)

The difference in capacity of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A81

P1A8600

Hybrid/EV Battery Stack 2 Delta SOC High (Extreme)

The difference in capacity of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1A86

HINT:

These DTCs can be stored after clearing the DTCs and driving the Toyota Prius vehicle for approximately 10 minutes.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the difference in capacity of each HV battery cell exceeds the specified value (excessively), the battery ECU assembly illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P1A81 (INF P1A8100), P1A86 (INF P1A8600): Battery cell malfunction
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1A81 (INF P1A8100) is not detected

DTC P1A86 (INF P1A8600) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1A8100 or P1A8600" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P0ABF28	Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure
	P0ABF2A	Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range
	P1CBB12	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery
	P1CBB14	Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open
	P1CC81E	Hybrid/EV Battery Stack 1 Voltage Difference Out of Range
	P1CC91E	Hybrid/EV Battery Stack 2 Voltage Difference Out of Range
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation
	P0B231C	Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range
	P1C2D62	Hybrid/EV Battery "A" Voltage Sensor/ Boosting Converter Voltage Sensor "A" Signal Compare Failure

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P1A8100" is also output.	A
"P1A8600" is also output.	B

GO TO STEP 7

3.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 28 Voltage" for DTC P1A8100 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

4.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

5.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

6.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

7.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV Battery Cell 29 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P1A8600 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

8.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

REPLACE BATTERY ECU ASSEMBLY

9.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

10.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

System Voltage (AM) Circuit Voltage Below Threshold (P1AFC00)

DESCRIPTION

The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1AFC00

System Voltage (AM) Circuit Voltage Below Threshold

The battery ECU assembly shutdown memory procedure did not complete normally in consecutive 40 trips.

(1 trip detection logic)

Wire harness or connector
Battery ECU assembly
Fuse

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P1AFC

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and wait for 11 seconds or more. *1
Turn the ignition switch off and wait for 2 minutes or more. *2
Perform the procedures *1 and *2 41 times or more.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P056014.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK FUSE (ECU-B NO. 2)

Click here

REPLACE FUSE (ECU-B NO. 2)

2.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

Click here

CONNECT SECURELY

3.	CHECK HARNESS AND CONNECTOR (AM VOLTAGE)

Click here

REPLACE BATTERY ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

Flying Capacitor Circuit Voltage Out of Range (P1AFD00)

DESCRIPTION

The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1AFD00

Flying Capacitor Circuit Voltage Out of Range

ECU internal malfunction

(1 trip detection logic)

Battery ECU assembly
HV battery

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1AFD

MONITOR DESCRIPTION

The battery ECU assembly monitors its internal operation. If the internal operation is malfunctioning, the battery ECU assembly illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	P1AFD (INF P1AFD00): Battery stack voltage sense circuit
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1AFD (INF P1AFD00) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 30 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
Only P1AFD00 is output	A
P1AFD00 and other DTCs are output	B

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

2.	CHECK CONNECTOR CONNECTION CONDITION (HV BATTERY HIGH VOLTAGE CONNECTOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

Procedure1

(b) Check the connector connections and contact pressure of the relevant terminals for the HV supply stack sub-assembly.

HINT:

Click here

OK:

The connector is connected securely and there are no contact problems.

Result:

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

CONNECT SECURELY

REPLACE HV BATTERY

Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range (P1AFD1C)

DESCRIPTION

The battery ECU assembly monitors the HV battery voltage. If the battery ECU assembly detects a malfunction of its internal voltage detection circuits, it will store this DTC.

HINT:

If this DTC is output, it will be necessary to replace the battery ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1AFD1C

Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range

Both of the following conditions are met:

The battery ECU assembly detects a malfunction of its internal voltage detection circuits.

The difference between the total voltage of all battery cells and the stack voltage is large.

(1 trip detection logic)

Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P1AFD

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in its internal voltage detection circuits, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P1AFD (INF P1AFD1C): Battery Voltage Sensor Circuit Range/Performance
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P1AFD (INF P1AFD1C) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 10 seconds or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

PROCEDURE

1.	REPLACE BATTERY ECU ASSEMBLY

HINT:

Click here

END

Hybrid/EV Battery ECU Multiple Reset (P1AFF00)

DESCRIPTION

The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1AFF00

Hybrid/EV Battery ECU Multiple Reset

ECU internal malfunction

(1 trip detection logic)

Battery ECU assembly

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P1AFF

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 3 hours or more.
With ignition switch ON and wait for 3 seconds or more.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

PROCEDURE

1.	REPLACE BATTERY ECU ASSEMBLY

HINT:

Click here

END

High Voltage Power Resource Internal Electronic Failure (P1C8549)

DESCRIPTION

The battery ECU assembly monitors an internal operation of the hybrid vehicle control ECU. If it detects a malfunction, it will be output this DTC and performs fail-safe control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1C8549

High Voltage Power Resource Internal Electronic Failure

An abnormal signal is detected by the battery ECU assembly (excessive discharging current).

(1 trip detection logic)

Hybrid Toyota Prius vehicle control ECU

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P3004

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Accelerator Position" and "Hybrid/EV Battery Current".
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1C8549" only is output.	A
DTCs except "P1C8549" of hybrid battery system are output.	B
DTCs except "P1C8549" of hybrid control system are output.	C

Post-procedure1

REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Hybrid/EV Battery Stack 1 Voltage Difference Out of Range (P1CC81E,P1CC91E)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors difference in voltage of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P1CC81E

Hybrid/EV Battery Stack 1 Voltage Difference Out of Range

The difference in voltage of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value.

(1 trip detection logic)

HV battery
HV battery junction block assembly
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33DA

P1CC91E

Hybrid/EV Battery Stack 2 Voltage Difference Out of Range

The difference in voltage of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value.

(1 trip detection logic)

HV battery
HV battery junction block assembly
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33DB

MONITOR DESCRIPTION

If the difference in voltage between each HV battery cell exceeds the specified value, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P33DA (INF P1CC81E), P33DB (INF P1CC91E): Battery cell malfunction
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P33DA (INF P1CC81E) is not detected

DTC P33DB (INF P1CC91E) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 1 hour or more.[*1]
Turn the ignition switch to ON.[*2]
With ignition switch ON and wait for 10 seconds or more.[*3]
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*4]
HINT:
- [*1] to [*4]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P1CC81E or P1CC91E" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P1CC81E" is also output.	A
"P1CC91E" is also output.	B

GO TO STEP 15

3.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

4.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV battery cell 1 voltage" through "Hybrid/EV battery cell 28 voltage" for DTC P1CC81E and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

5.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

GO TO STEP 14

6.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

GO TO STEP 10

7.	REPLACE HV BATTERY

HINT:

Click here

8.	SIMULATION TEST

Pre-procedure1

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Procedure1

(b) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

Post-procedure1

9.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check if DTCs are output.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
"P1CC81E" is output.	A
"P1CC81E" is not output.	B

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

END

10.	REPLACE HV BATTERY

HINT:

Click here

11.	REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

HINT:

Click here

12.	SIMULATION TEST

Pre-procedure1

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Procedure1

(b) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

Post-procedure1

13.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check if DTCs are output.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
"P1CC81E" is output.	A
"P1CC81E" is not output.	B

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

END

14.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

15.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

16.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV battery cell 29 voltage" through "Hybrid/EV battery cell 56 voltage" for DTC P1CC91E and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

17.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

Click here

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

GO TO STEP 26

18.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

GO TO STEP 22

19.	REPLACE HV BATTERY

HINT:

Click here

20.	SIMULATION TEST

Pre-procedure1

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Procedure1

(b) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

Post-procedure1

21.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check if DTCs are output.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
"P1CC91E" is output.	A
"P1CC91E" is not output.	B

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

END

22.	REPLACE HV BATTERY

HINT:

Click here

23.	REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

HINT:

Click here

24.	SIMULATION TEST

Pre-procedure1

(a) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Procedure1

(b) Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.

Post-procedure1

25.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check if DTCs are output.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
"P1CC91E" is output.	A
"P1CC91E" is not output.	B

Post-procedure1

REPLACE BATTERY ECU ASSEMBLY

END

26.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

Hybrid/EV Battery Discharge Control Malfunction (P300000)

DESCRIPTION

The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals. If the SOC drops due to running out of fuel, the vehicle being left with the shift lever in N for a long time or a hybrid control system malfunction, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P300000

Hybrid/EV Battery Discharge Control Malfunction

Discharging of the HV battery continues even after discharging is prohibited when the "SOC" has reached the lower limit.

(1 trip detection logic)

SFI system
Fuel level
HV battery state of charge

Does not come on

Master Warning:

Does not come on

HV Battery

SAE Code: P3000

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON (READY) with the shift lever in P and cause the "Hybrid/EV Battery SOC" to decrease. Check that the engine is started to charge the HV battery, and the value of Data List item "Hybrid/EV Battery SOC" increases and then remains within an appropriate range.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

HINT:

If the Toyota Prius vehicle is left with the shift lever in N (parked or stopped) for a long time, the battery cannot be charged. In this case, the SOC may drop below the lower limit and DTC P300000 may be stored. (This is not a system malfunction.)
When the engine cannot be started, DTC P300000 may be stored because the HV battery cannot be charged.
Repeated engine start checks may cause the SOC to drop, resulting in DTC P300000 being stored. In this case, charge the HV battery using the THS charger.
Cranking the engine once causes the SOC to drop approximately 1%.
Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.
Charging the HV battery using the THS charger takes approximately 10 minutes when the battery temperature is 25°C (77°F) or approximately 30 minutes when the battery temperature is 0°C (32°F).
The THS charger is a supplemental charging device that enables the hybrid system to start (READY-on state).
If the result of this inspection is to charge the HV battery, clear the DTCs and then charge the HV battery using the THS charger.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P300000 or P300016" only is output.	A
DTCs except "P300000 or P300016" of hybrid battery system are output.	B
DTCs except "P300000 or P300016" of hybrid control system are output.	C

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK DTC OUTPUT (ENGINE)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Post-procedure1

GO TO DTC CHART (SFI SYSTEM)

3.	CHECK AMOUNT OF FUEL

Pre-procedure1

(a) Turn the ignition switch to ON.

Procedure1

(b) Check the amount of fuel by referring to the fuel gauge in the meter.

Result	Proceed to
Proper amount of fuel is in the tank.	A
There is no fuel in the tank.	B

HINT:

Add fuel until the low fuel level warning light turns off.

Post-procedure1

REFUEL Toyota Prius Vehicle

4.	CHECK FREEZE FRAME DATA (SHIFT POSITION)

Pre-procedure1

(a) None.

Procedure1

(b) Read the freeze frame data item "Shift Position" of DTC P300000.

Powertrain > HV Battery > Trouble Codes Powertrain > HV Battery

Tester Display
Shift Position

NOTICE:

When the freeze frame data "Shift Position" was N, DTC P300000 may be stored due to the Toyota Prius vehicle was left with the shift lever in N and the HV battery could not be charged.
If DTC "P300000" only is output, charge the HV battery without replacing the HV battery if necessary.

Post-procedure1

5.	CHECK ENGINE START

Pre-procedure1

(a) Turn the ignition switch to ON (READY).

Procedure1

(b) Check if the engine starts.

HINT:

Depressing the accelerator pedal with the shift lever in P will cause the engine to start.
Turning the ignition switch to ON (READY) and off repeatedly while the SOC is low may cause the SOC to drop further, resulting in DTC P300016 being stored. Charge the HV battery using the THS charger as necessary.
Cranking the engine once causes the SOC to drop approximately 1%.
Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.

Result	Proceed to
The engine starts.	A
The engine does not start.	B

Post-procedure1

LEAVE Toyota Prius Vehicle WITH THE SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS

6.	CLEAR DTC (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Clear the DTCs and freeze frame data.

Powertrain > HV Battery > Clear DTCs

Post-procedure1

(d) None.

CHARGE HV BATTERY

(a) Charge the HV battery using the THS charger, then check that engine starts.

Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)

DESCRIPTION

The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals.

If the HV battery is discharged excessively or the hybrid battery system is malfunctioning, this DTC will be stored.

HINT:

If the HV battery voltage has dropped due to a malfunction in other components, such as the inverter with converter assembly or the hybrid Toyota Prius vehicle transaxle assembly, recharging the HV battery will be able to restore the voltage. If the HV battery voltage has dropped excessively after the vehicle was left for a long time, the HV battery will need to be replaced.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P300016

Hybrid/EV Battery Control System Circuit Voltage Below Threshold

Either of the following conditions is met:

A malfunction signal is received from the battery ECU assembly.

The voltage of any HV battery cell has decreased excessively.

(1 trip detection logic)

SFI system
Engine
Hybrid Toyota Prius vehicle transaxle assembly
HV battery state of charge

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P3000

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON (READY) with the shift lever in P.
Wait until the engine starts and then stops.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

HINT:

Thoroughly interview the customer as DTC P300016 may be stored if the SOC drops due to the Toyota Prius vehicle being left with the shift lever in N for a long time or running out of fuel.
When the engine cannot be started, DTC P300016 may be stored because the HV battery cannot be charged.
If differences among SOCs of HV battery exceed the specifications, the master warning may illuminate when "Battery Diagnosis" is complete. In this case, check for hybrid system related DTCs. If DTC P300016 is output, leave the Toyota Prius vehicle with the ignition switch ON (READY) for 10 minutes or more allowing the vehicle to charge the HV battery. Then clear the DTCs.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P300000 or P300016" only is output.	A
DTCs except "P300000 or P300016" of hybrid battery system are output.	B
DTCs except "P300000 or P300016" of hybrid control system are output.	C

(b) Turn the ignition switch off.

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK DTC OUTPUT (ENGINE)

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

(b) Turn the ignition switch off.

GO TO DTC CHART (SFI SYSTEM)

3.	CHECK ENGINE START

(a) Turn the ignition switch to ON (READY).

(b) Check if the engine starts.

NOTICE:

Do not turn the ignition switch to ON (READY) repeatedly after duplicating the problem symptom indicated by DTC P300016 and clearing the DTCs. This may cause another problem to occur.

HINT:

Depressing the accelerator pedal with the shift lever in P will cause the engine to start.

Result	Proceed to
The engine does not start.	A
The engine starts.	B

LEAVE Toyota Prius Vehicle WITH THE SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS

4.	CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

(a) Make sure that the shift lever is in P position.

(b) Lift up the Toyota Prius vehicle.

CAUTION:

Do not turn the ignition switch to ON (READY) while performing this inspection. Be sure to turn the ignition switch off before performing this inspection, to prevent the engine from starting.

NOTICE:

Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good Toyota Prius vehicle of the same type.

Result	Proceed to
The crankshaft rotates smoothly.	A
The crankshaft does not rotate smoothly.	B

(d) Lower the Toyota Prius vehicle.

CHARGE HV BATTERY

HINT:

As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

5.	CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)

(a) Lift up the Toyota Prius vehicle.

(b) Move the shift lever to N.

CAUTION:

Do not turn the ignition switch to ON (READY) while performing this inspection. Be sure to turn the ignition switch off before performing this inspection, to prevent the engine from starting.

NOTICE:

Result	Proceed to
The crankshaft does not rotate smoothly.	A
The crankshaft rotates smoothly.	B

(d) Move the shift lever to P.

(e) Lower the Toyota Prius vehicle.

GO TO STEP 8

6.	REPAIR OR REPLACE ENGINE

7.	CHECK ENGINE START

(a) Turn the ignition switch to ON (READY).

(b) Check if the engine starts.

NOTICE:

Do not turn the ignition switch to ON (READY) repeatedly after duplicating the problem symptom indicated by DTC P300016 and clearing the DTCs. This may cause another problem to occur.

HINT:

Depressing the accelerator pedal with the shift lever in P will cause the engine to start.

Result	Proceed to
The engine does not start.	A
The engine starts.	B

CHARGE HV BATTERY

HINT:

As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

LEAVE Toyota Prius Vehicle WITH THE SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS

8.	REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

HINT:

Click here

9.	CHECK ENGINE START

(a) Turn the ignition switch to ON (READY).

(b) Check if the engine starts.

NOTICE:

Do not turn the ignition switch to ON (READY) repeatedly after duplicating the problem symptom indicated by DTC P300016 and clearing the DTCs. This may cause another problem to occur.

HINT:

Depressing the accelerator pedal with the shift lever in P will cause the engine to start.

Result	Proceed to
The engine does not start.	A
The engine starts.	B

CHARGE HV BATTERY

HINT:

As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

LEAVE Toyota Prius Vehicle WITH THE SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS

Hybrid/EV Battery Control System Over Temperature (P30004B)

DESCRIPTION

The battery ECU assembly monitors the temperature of the HV battery to detect if it becomes excessively high.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P30004B

Hybrid/EV Battery Control System Over Temperature

The battery ECU assembly detects a HV battery cooling system error signal.

(1 trip detection logic)

Hybrid Toyota Prius vehicle control ECU
HV battery

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P3000

HINT:

The normal HV battery temperature is 60°C (140°F) or less.

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Hybrid/EV Battery Temperature 1 to 6", "Hybrid/EV Battery Cooling Fan Intake Air Temperature 1", "Ambient Temperature" and "Hybrid/EV Battery Current".
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
"P30004B" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P0A8111	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground
	P0A8115	Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open
	P0A8196	Hybrid/EV Battery Cooling Fan 1 Component Internal Failure
	P0A9B11	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground
	P0A9B15	Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open
	P0A9B1C	Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range
	P0A9B2A	Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range
	P0AAC11	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground
	P0AAC15	Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open
	P0AC511	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground
	P0AC515	Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open
	P0AC51C	Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range
	P0AC52A	Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range
	P0ACA11	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground
	P0ACA15	Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open
	P0ACA1C	Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range
	P0ACA2A	Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range
	P0AE811	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Ground
	P0AE815	Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Auxiliary Battery or Open
	P0AE81C	Hybrid/EV Battery Temperature Sensor "D" Voltage Out of Range
	P0AE82A	Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range
	P0BC211	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Ground
	P0BC215	Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Auxiliary Battery or Open
	P0BC21C	Hybrid/EV Battery Temperature Sensor "E" Voltage Out of Range
	P0BC22A	Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range
	P0C3311	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Ground
	P0C3315	Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Auxiliary Battery or Open
	P0C331C	Hybrid/EV Battery Temperature Sensor "F" Voltage Out of Range
	P0C332A	Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range
	P306562	Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure
	P306A62	Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

HINT:

Click here

REPLACE HV BATTERY

Hybrid/EV Battery Voltage High (P31B300)

DESCRIPTION

If the voltage of any HV battery cell exceeds the threshold, charging will be prohibited. If charging cannot be prohibited due to a hybrid battery system malfunction, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P31B300

Hybrid/EV Battery Voltage High

Charging cannot be prohibited when the voltage of any HV battery cell has exceeded the specified threshold.

(1 trip detection logic)

Hybrid Toyota Prius vehicle control ECU
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P31B3

MONITOR DESCRIPTION

If the maximum voltage of any HV battery cell exceeds the threshold but charging continues to be performed, the battery ECU assembly will determine that there is a malfunction, illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs	P31B3 (INF P31B300): Battery cell Voltage high
Required sensors/components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P31B3 (INF P31B300) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AA649.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P31B300" only is output.	A
DTCs except "P31B300" of hybrid battery system are output.	B
DTCs except "P31B300" of hybrid control system are output.	C

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK FREEZE FRAME DATA (READY SIGNAL, SMR CONTROL STATUS, HYBRID/EV BATTERY CURRENT)

Pre-procedure1

(a) None.

Procedure1

(b) Read the freeze frame data of DTC P31B300.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
OFF is displayed for "Ready Signal", "SMRB Control Status" and "SMRG Control Status" and -0.5 A or less is displayed for "Hybrid/EV Battery Current".	A
Other than above	B

HINT:

As the ignition switch ON state may cause the DTC to be stored, freeze frame data is used to judge the cause of the DTC output.

Post-procedure1

REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

3.	INSPECT HV BATTERY JUNCTION BLOCK ASSEMBLY (SMRB, SMRG)

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

4.	PERFORM INITIALIZATION (CURRENT SENSOR OFFSET LEARNING)

Click here

END

Extreme Hybrid/EV Battery Charging Current (P31B400)

DESCRIPTION

The battery ECU assembly monitors its internal operation, it will set DTCs and perform fail-safe control when it detects the following malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P31B400

Extreme Hybrid/EV Battery Charging Current

An abnormal signal is detected by the battery ECU assembly (excessive charging current).

(1 trip detection logic)

Hybrid Toyota Prius vehicle control ECU

Does not come on

Master Warning:

Comes on

HV Battery

SAE Code: P31B4

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Accelerator Position", "Hybrid/EV Battery Temperature 1 to 6" and "Hybrid/EV Battery Current".
Enter the following menus: Powertrain / HV battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P31B400" only is output.	A
DTCs except "P31B400" of hybrid battery system are output.	B
DTCs except "P31B400" of hybrid control system are output.	C

Post-procedure1

REPLACE HYBRID Toyota Prius Vehicle CONTROL ECU

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the internal resistance of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P33DA1E

Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range

The difference in internal resistance of each cell of the No. 1 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

HV battery
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33DA

P33DB1E

Hybrid/EV Battery Stack 2 Circuit Resistance Out of Range

The difference in internal resistance of each cell of the No. 2 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

HV battery
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33DB

HINT:

These DTCs can be stored after clearing DTCs and driving the Toyota Prius vehicle for approximately 10 minutes.
In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
- Make sure the air intake port for HV battery is not blocked.
- Make sure there are no gaps between the connecting parts of the ducts.
- Clean the No. 1 HV battery intake filter.
  - Clear the DTCs to reset the learning values even if no DTCs are stored.

MONITOR DESCRIPTION

If there is an abnormal internal resistance in the battery cells, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P33DA (INF P33DA1E), P33DB (INF P33DB1E): Battery cell malfunction
Required sensors/components	Battery ECU assembly / Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P33DA (INF P33DA1E) is not detected

DTC P33DB (INF P33DB1E) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
(This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

2.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold (P33E01B,P33E11B)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the internal resistance of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P33E01B

Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold

The internal resistance of any cell of the No. 1 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

HV battery
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33E0

P33E11B

Hybrid/EV Battery Stack 2 Circuit Resistance Above Threshold

The internal resistance of any cell of the No. 2 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

HV battery
HV battery junction block assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33E1

HINT:

These DTCs can be stored after clearing DTCs and driving the Toyota Prius vehicle for approximately 10 minutes.

MONITOR DESCRIPTION

MONITOR STRATEGY

Related DTCs	P33E0 (INF P33E01B), P33E1 (INF P33E11B): Battery cell malfunction
Required sensors/components	Battery ECU assembly / Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	1 driving cycle
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P33E0 (INF P33E01B) is not detected

DTC P33E1 (INF P33E11B) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
(This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P33E01B or P33E11B" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the Toyota Prius vehicle has been driven.

Result		Proceed to
Total distance driven is less than 200000 km (124280 mile)		A
Total distance driven is 200000 km (124280 mile) or more	Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1	A
Total distance driven is 200000 km (124280 mile) or more	Other than above	B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

REPLACE HV BATTERY

3.	REPLACE HV BATTERY

HINT:

Click here

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Stack 1 Capacity Decline (P33E600,P33E700)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the capacity of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P33E600

Hybrid/EV Battery Stack 1 Capacity Decline

Full charge capacity of the No. 1 HV supply stack sub-assembly is less than the specified value.

(1 trip detection logic)

HV battery

Does not come on

Master Warning Light:

Comes on

HV Battery

SAE Code: P33E6

P33E700

Hybrid/EV Battery Stack 2 Capacity Decline

Full charge capacity of the No. 2 HV supply stack sub-assembly is less than the specified value.

(1 trip detection logic)

HV battery

Does not come on

Master Warning Light:

Comes on

HV Battery

SAE Code: P33E7

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.
(This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P33E600 or P33E700" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

REPLACE HV BATTERY

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold (P33EC16,P33ED16)

DESCRIPTION

If the voltage of an HV battery cell is lower than the threshold for a certain amount of time, the battery ECU assembly will interpret this as a malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

P33EC16

(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold

The voltage of any cell of the No. 1 HV supply stack sub-assembly has decreased excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33EC

P33ED16

(Extreme) Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold

The voltage of any cell of the No. 2 HV supply stack sub-assembly has decreased excessively.

(1 trip detection logic)

HV battery
Battery ECU assembly

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: P33ED

CAUTION:

Do not charge the HV battery using the THS charger if DTC P33EC16 or P33ED16 is output.

MONITOR DESCRIPTION

If the battery ECU assembly detects voltage drop in the battery cells, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P33EC (INF P33EC16), P33ED (INF P33ED16): Cell voltage too low
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P33EC (INF P33EC16) is not detected

DTC P33ED (INF P33ED16) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Drive the Toyota Prius vehicle on urban roads for approximately 10 minutes.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Post-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
"P33EC16 or P33ED16" only is output, or DTCs except the ones in the table below are also output.	A
DTCs of hybrid battery system in the table below are output.	B
DTCs of hybrid control system in the table below are output.	C

System	Relevant DTC
Hybrid battery system	P060A47	Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
	P060B49	Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
	P060687	Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
	P0E2D00	Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance
Hybrid control system	P0A1F94	Hybrid/EV Battery Energy Control Module Unexpected Operation

Post-procedure1

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

CHECK DTC

(a) Check the DTCs that were output when the Toyota Prius vehicle was brought to the workshop.

Result	Proceed to
"P33EC16" is also output.	A
"P33ED16" is also output.	B

GO TO STEP 8

3.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

4.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Post-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV battery cell 1 voltage" through "Hybrid/EV battery cell 28 voltage" for DTC P33EC16 and make a note if the value of any is 1.2 V or less.

Powertrain > HV Battery > Trouble Codes

Procedure1

5.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 1 - 28)

CAUTION:

Be sure to wear insulated gloves and protective goggles.
Disconnect only the connector corresponding to the HV battery cell to be checked. Do not disconnect the other connectors.

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of each HV battery cell.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

Procedure1

HINT:

Measure the voltage of the HV battery cells whose value in the freeze frame data was 1.2 V or less only.

HV Battery Cell	Tester Connection	Condition
1	z12-19 (GA0) - z12-41 (VA1)	Always
2	z12-41 (VA1) - z12-18 (VA2)	Always
3	z12-18 (VA2) - z12-40 (VA3)	Always
4	z12-40 (VA3) - z12-17 (VA4)	Always
5	z12-17 (VA4) - z12-39 (VA5)	Always
6	z12-39 (VA5) - z12-16 (VA6)	Always
7	z12-16 (VA6) - z12-38 (VA7)	Always
8	z12-38 (VA7) - z12-13 (VA8)	Always
9	z12-13 (VA8) - z12-35 (VA9)	Always
10	z12-35 (VA9) - z12-12 (VA10)	Always
11	z12-12 (VA10) - z12-34 (VA11)	Always
12	z12-34 (VA11) - z12-11 (VA12)	Always
13	z12-11 (VA12) - z12-33 (VA13)	Always
14	z12-33 (VA13) - z12-10 (VA14)	Always
15	z12-10 (VA14) - z12-32 (VA15)	Always
16	z12-32 (VA15) - z12-9 (VA16)	Always
17	z12-9 (VA16) - z12-31 (VA17)	Always
18	z12-31 (VA17) - z12-8 (VA18)	Always
19	z12-8 (VA18) - z12-30 (VA19)	Always
20	z12-30 (VA19) - z12-7 (VA20)	Always
21	z12-29 (GA1) - z12-6 (VA21)	Always
22	z12-6 (VA21) - z12-28 (VA22)	Always
23	z12-28 (VA22) - z12-5 (VA23)	Always
24	z12-5 (VA23) - z12-27 (VA24)	Always
25	z12-27 (VA24) - z12-4 (VA25)	Always
26	z12-4 (VA25) - z12-26 (VA26)	Always
27	z12-26 (VA26) - z12-3 (VA27)	Always
28	z12-3 (VA27) - z12-23 (VA28)	Always

CAUTION:

Make sure not to cross the electrodes of an electrical tester measurement terminals.

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.

Result	Proceed to
The voltage between the terminals is 1.2 V or less.	A
Other than above	B

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

6.	CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance.

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Only inspect the terminals of the battery ECU assembly which correspond to the HV battery cells which measured 1.2 V or less in the previous step.

Component without harness connected

(Battery ECU Assembly)

Standard Resistance:

HV Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
1	z12-19 (GA0) (-) - z12-41 (VA1) ( )	Always	50 kΩ or more
2	z12-41 (VA1) (-) - z12-18 (VA2) ( )	Always	50 kΩ or more
3	z12-18 (VA2) (-) - z12-40 (VA3) ( )	Always	50 kΩ or more
4	z12-40 (VA3) (-) - z12-17 (VA4) ( )	Always	50 kΩ or more
5	z12-17 (VA4) (-) - z12-39 (VA5) ( )	Always	50 kΩ or more
6	z12-39 (VA5) (-) - z12-16 (VA6) ( )	Always	50 kΩ or more
7	z12-16 (VA6) (-) - z12-38 (VA7) ( )	Always	50 kΩ or more
8	z12-38 (VA7) (-) - z12-13 (VA8) ( )	Always	50 kΩ or more
9	z12-13 (VA8) (-) - z12-35 (VA9) ( )	Always	50 kΩ or more
10	z12-35 (VA9) (-) - z12-12 (VA10) ( )	Always	50 kΩ or more
11	z12-12 (VA10) (-) - z12-34 (VA11) ( )	Always	50 kΩ or more
12	z12-34 (VA11) (-) - z12-11 (VA12) ( )	Always	50 kΩ or more
13	z12-11 (VA12) (-) - z12-33 (VA13) ( )	Always	50 kΩ or more
14	z12-33 (VA13) (-) - z12-10 (VA14) ( )	Always	50 kΩ or more
15	z12-10 (VA14) (-) - z12-32 (VA15) ( )	Always	50 kΩ or more
16	z12-32 (VA15) (-) - z12-9 (VA16) ( )	Always	50 kΩ or more
17	z12-9 (VA16) (-) - z12-31 (VA17) ( )	Always	50 kΩ or more
18	z12-31 (VA17) (-) - z12-8 (VA18) ( )	Always	50 kΩ or more
19	z12-8 (VA18) (-) - z12-30 (VA19) ( )	Always	50 kΩ or more
20	z12-30 (VA19) (-) - z12-7 (VA20) ( )	Always	50 kΩ or more
21	z12-29 (GA1) (-) - z12-6 (VA21) ( )	Always	50 kΩ or more
22	z12-6 (VA21) (-) - z12-28 (VA22) ( )	Always	50 kΩ or more
23	z12-28 (VA22) (-) - z12-5 (VA23) ( )	Always	50 kΩ or more
24	z12-5 (VA23) (-) - z12-27 (VA24) ( )	Always	50 kΩ or more
25	z12-27 (VA24) (-) - z12-4 (VA25) ( )	Always	50 kΩ or more
26	z12-4 (VA25) (-) - z12-26 (VA26) ( )	Always	50 kΩ or more
27	z12-26 (VA26) (-) - z12-3 (VA27) ( )	Always	50 kΩ or more
28	z12-3 (VA27) (-) - z12-23 (VA28) ( )	Always	50 kΩ or more

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.
Read the resistance after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance of the battery ECU assembly.

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

Post-procedure1

REPLACE HV BATTERY

7.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

8.	CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)

Click here

Result		Proceed to
OK		A
Not connected securely	The terminals are not damaged or corroded	B
Not connected securely	The terminals are damaged or corroded	C

CONNECT SECURELY

REPLACE HV BATTERY

9.	CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

Pre-procedure1

(a) None.

Procedure1

(b) Read the value of freeze frame data items "Hybrid/EV battery cell 29 voltage" through "Hybrid/EV battery cell 56 voltage" for DTC P33ED16 and make a note if the value of any is 1.2 V or less.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

10.	CHECK HV BATTERY (HV BATTERY CELL VOLTAGE 29 - 56)

CAUTION:

Be sure to wear insulated gloves and protective goggles.
Disconnect only the connector corresponding to the HV battery cell to be checked. Do not disconnect the other connectors.

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the voltage of each HV battery cell.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

Procedure1

HINT:

Measure the voltage of the HV battery cells whose value in the freeze frame data was 1.2 V or less only.

HV Battery Cell	Tester Connection	Condition
29	z14-22 (VAD) - z14-44 (VA29)	Always
30	z14-44 (VA29) - z14-21 (VA30)	Always
31	z14-21 (VA30) - z14-43 (VA31)	Always
32	z14-43 (VA31) - z14-20 (VA32)	Always
33	z14-20 (VA32) - z14-42 (VA33)	Always
34	z14-42 (VA33) - z14-19 (VA34)	Always
35	z14-19 (VA34) - z14-16 (VA35)	Always
36	z14-35 (GA2) - z14-12 (VA36)	Always
37	z14-12 (VA36) - z14-34 (VA37)	Always
38	z14-34 (VA37) - z14-11 (VA38)	Always
39	z14-11 (VA38) - z14-33 (VA39)	Always
40	z14-33 (VA39) - z14-10 (VA40)	Always
41	z14-10 (VA40) - z14-32 (VA41)	Always
42	z14-32 (VA41) - z14-9 (VA42)	Always
43	z14-9 (VA42) - z14-31 (VA43)	Always
44	z14-31 (VA43) - z14-8 (VA44)	Always
45	z14-8 (VA44) - z14-30 (VA45)	Always
46	z14-30 (VA45) - z14-7 (VA46)	Always
47	z14-7 (VA46) - z14-29 (VA47)	Always
48	z14-29 (VA47) - z14-6 (VA48)	Always
49	z14-6 (VA48) - z14-28 (VA49)	Always
50	z14-28 (VA49) - z14-5 (VA50)	Always
51	z14-5 (VA50) - z14-27 (VA51)	Always
52	z14-27 (VA51) - z14-4 (VA52)	Always
53	z14-4 (VA52) - z14-26 (VA53)	Always
54	z14-26 (VA53) - z14-3 (VA54)	Always
55	z14-3 (VA54) - z14-25 (VA55)	Always
56	z14-25 (VA55) - z14-23 (VA56)	Always

CAUTION:

Make sure not to cross the electrodes of an electrical tester measurement terminals.

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.

Result	Proceed to
The voltage between the terminals is 1.2 V or less.	A
Other than above	B

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

11.	CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

NOTICE:

Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance.

Pre-procedure1

(a) Remove the battery ECU assembly.

HINT:

Click here

Procedure1

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Only inspect the terminals of the battery ECU assembly which correspond to the HV battery cells which measured 1.2 V or less in the previous step.

Component without harness connected

(Battery ECU Assembly)

Standard Resistance:

HV Battery Cell	Tester Connection (Tester Probe Polarity)	Condition	Specified Condition
29	z14-22 (VAD) (-) - z14-44 (VA29) ( )	Always	50 kΩ or more
30	z14-44 (VA29) (-) - z14-21 (VA30) ( )	Always	50 kΩ or more
31	z14-21 (VA30) (-) - z14-43 (VA31) ( )	Always	50 kΩ or more
32	z14-43 (VA31) (-) - z14-20 (VA32) ( )	Always	50 kΩ or more
33	z14-20 (VA32) (-) - z14-42 (VA33) ( )	Always	50 kΩ or more
34	z14-42 (VA33) (-) - z14-19 (VA34) ( )	Always	50 kΩ or more
35	z14-19 (VA34) (-) - z14-16 (VA35) ( )	Always	50 kΩ or more
36	z14-35 (GA2) (-) - z14-12 (VA36) ( )	Always	50 kΩ or more
37	z14-12 (VA36) (-) - z14-34 (VA37) ( )	Always	50 kΩ or more
38	z14-34 (VA37) (-) - z14-11 (VA38) ( )	Always	50 kΩ or more
39	z14-11 (VA38) (-) - z14-33 (VA39) ( )	Always	50 kΩ or more
40	z14-33 (VA39) (-) - z14-10 (VA40) ( )	Always	50 kΩ or more
41	z14-10 (VA40) (-) - z14-32 (VA41) ( )	Always	50 kΩ or more
42	z14-32 (VA41) (-) - z14-9 (VA42) ( )	Always	50 kΩ or more
43	z14-9 (VA42) (-) - z14-31 (VA43) ( )	Always	50 kΩ or more
44	z14-31 (VA43) (-) - z14-8 (VA44) ( )	Always	50 kΩ or more
45	z14-8 (VA44) (-) - z14-30 (VA45) ( )	Always	50 kΩ or more
46	z14-30 (VA45) (-) - z14-7 (VA46) ( )	Always	50 kΩ or more
47	z14-7 (VA46) (-) - z14-29 (VA47) ( )	Always	50 kΩ or more
48	z14-29 (VA47) (-) - z14-6 (VA48) ( )	Always	50 kΩ or more
49	z14-6 (VA48) (-) - z14-28 (VA49) ( )	Always	50 kΩ or more
50	z14-28 (VA49) (-) - z14-5 (VA50) ( )	Always	50 kΩ or more
51	z14-5 (VA50) (-) - z14-27 (VA51) ( )	Always	50 kΩ or more
52	z14-27 (VA51) (-) - z14-4 (VA52) ( )	Always	50 kΩ or more
53	z14-4 (VA52) (-) - z14-26 (VA53) ( )	Always	50 kΩ or more
54	z14-26 (VA53) (-) - z14-3 (VA54) ( )	Always	50 kΩ or more
55	z14-3 (VA54) (-) - z14-25 (VA55) ( )	Always	50 kΩ or more
56	z14-25 (VA55) (-) - z14-23 (VA56) ( )	Always	50 kΩ or more

NOTICE:

Make sure to check the polarity of each terminal (positive ( ) or negative (-)) before connecting a tester.
Read the resistance after the value has stabilized.
In order to avoid damaging the terminals of the battery ECU assembly, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance of the battery ECU assembly.

Result	Proceed to
The voltage between the terminals is 50 kΩ or more.	A
Other than above	B

Post-procedure1

REPLACE HV BATTERY

12.	REPLACE HV BATTERY

HINT:

Click here

REPLACE BATTERY ECU ASSEMBLY

Lost Communication with ECM/PCM "A" Missing Message (U010087)

DESCRIPTION

The battery ECU assembly transmits and receives signals via CAN communication to and from the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

U010087

Lost Communication with ECM/PCM "A" Missing Message

A CAN communication error between the battery ECU assembly and ECM (CAN communication system malfunction) occurs

(1 trip detection logic)

CAN communication system

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: U0100

MONITOR DESCRIPTION

If the battery ECU assembly detects a problem with CAN communication with the ECU, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	U0100 (INF U010087): Lost communication with ECM/PCM
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC U0100 (INF U010087) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 2 minutes or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

PROCEDURE

1.	CHECK DTC OUTPUT (HV BATTERY)

Pre-procedure1

(a) None.

Procedure1

(b) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Post-procedure1

GO TO CAN COMMUNICATION SYSTEM

Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message (U115087)

DESCRIPTION

The battery ECU assembly transmits and receives signals via CAN communication to and from the hybrid vehicle control ECU.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

DTC Output from

Priority

Note

U115087

Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message

The battery ECU assembly does not receive any signals from the hybrid Toyota Prius vehicle control ECU for 1 second or more.

(1 trip detection logic)

CAN communication system

Comes on

Master Warning:

Comes on

HV Battery

SAE Code: U1150

MONITOR DESCRIPTION

If the battery ECU assembly cannot communicate with the hybrid Toyota Prius vehicle control ECU via CAN communication, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	U1150 (INF U115087): Lost communication with hybrid control module (battery bus)
Required sensors/components	Battery ECU assembly
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC U1150 (INF U115087) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the Toyota Prius vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
With ignition switch ON and wait for 2 minutes or more.[*1]
HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK DTC OUTPUT (HYBRID CONTROL)

Pre-procedure1

(a) None

Procedure1

(b) Check and record any Hybrid Control DTCs and freeze frame data. Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
DTCs related to Hybrid Control System are not output.	A
DTCs related to Hybrid Control System are output.	B

Post-procedure1

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

2.	CHECK HYBRID Toyota Prius Vehicle CONTROL ECU (VOLTAGE)

Pre-procedure1

(a) Turn the ignition switch to ON.

Procedure1

(b) Measure the voltage according to the value(s) in the table below.

Component with harness connected

(Hybrid Toyota Prius Vehicle Control ECU)

Standard Voltage:

Click Location & Routing(K11) Click Connector(K11)

Tester Connection	Condition	Specified Condition	Result
K11-8 ( B1) - Body ground	Ignition switch ON	11 to 14 V	V

Post-procedure1

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

3.	CHECK HYBRID Toyota Prius Vehicle CONTROL ECU

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Procedure1

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition	Result
R40-22 (CA1H) - R40-21 (CA1L)	Ignition switch off	108 to 132 Ω	Ω

Post-procedure1

(d) Reconnect the battery ECU assembly connector.

REPLACE BATTERY ECU ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (HYBRID Toyota Prius Vehicle CONTROL ECU - BATTERY ECU ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

Pre-procedure1

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the hybrid Toyota Prius vehicle control ECU connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Disconnect the K53 transmission floor shift assembly (shift control ECU) connector.

(e) Disconnect the C49 shift control actuator assembly (shift actuator ECU) connector.

(f) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.
Check the terminals of the connector for deformation and corrosion.

Procedure1

(g) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40,K11) Click Connector(R40) Click Connector(K11)

Tester Connection	Condition	Specified Condition	Result
R40-22 (CA1H) - K11-9 (CA4H)	Ignition switch off	Below 1 Ω	Ω
R40-21 (CA1L) - K11-22 (CA4L)	Ignition switch off	Below 1 Ω	Ω
R40-22 (CA1H) or K11-9 (CA4H) - Other terminals and body ground	Ignition switch off	10 kΩ or higher	kΩ
R40-21 (CA1L) or K11-22 (CA4L) - Other terminals and body ground	Ignition switch off	10 kΩ or higher	kΩ

Post-procedure1

(h) Reconnect the battery ECU assembly connector.

(i) Reconnect the shift control actuator assembly (shift actuator ECU) connector.

(j) Reconnect the transmission floor shift assembly (shift control ECU) connector.

(k) Reconnect the inverter with converter assembly connector.

(l) Reconnect the hybrid Toyota Prius vehicle control ECU connector.

REPLACE HYBRID VEHICLE CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

"HAVE TRACTION BATTERY INSPECTED" is displayed

DESCRIPTION

The battery ECU assembly monitors the SOC (State Of Charge) of the HV battery. When it finds the HV battery has deteriorated excessively, it will display "Have Traction Battery Inspected" on the multi-information display. If "Have Traction Battery Inspected" is displayed, perform "Battery Diagnosis" and replace the HV battery as necessary.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

If "Have Traction Battery Inspected" is displayed on the multi-information display, the message will not be cleared until one of the following conditions is met. If the traction battery is used continually without performing battery diagnosis for a few weeks*, "Toyota Prius Vehicle START WILL SOON BE DISABLED" and "Have Traction Battery Inspected" are displayed and the use of the HV battery is limited. If it is used more, the power on (READY) operation will be disabled.
*: The timing may vary depending on vehicle usage.
"Have Traction Battery Inspected" is cleared when both of the following conditions are met:
1. "Prediagnostic Battery Charge" and "Battery Diagnosis" have been performed.
2. "003" (There is no need to replace HV battery) is displayed on the GTS.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	READ VALUE USING GTS (HYBRID/EV BATTERY CELL 1 TO 56 INTERNAL RESISTANCE)

(a) Read the value of Data List items "Hybrid/EV Battery Cell 1 Internal Resistance" through "Hybrid/EV Battery Cell 56 Internal Resistance".

Powertrain > HV Battery > Data List

Tester Display
Hybrid/EV Battery Cell 1 Internal Resistance
Hybrid/EV Battery Cell 2 Internal Resistance
Hybrid/EV Battery Cell 3 Internal Resistance
Hybrid/EV Battery Cell 4 Internal Resistance
Hybrid/EV Battery Cell 5 Internal Resistance
Hybrid/EV Battery Cell 6 Internal Resistance
Hybrid/EV Battery Cell 7 Internal Resistance
Hybrid/EV Battery Cell 8 Internal Resistance
Hybrid/EV Battery Cell 9 Internal Resistance
Hybrid/EV Battery Cell 10 Internal Resistance
Hybrid/EV Battery Cell 11 Internal Resistance
Hybrid/EV Battery Cell 12 Internal Resistance
Hybrid/EV Battery Cell 13 Internal Resistance
Hybrid/EV Battery Cell 14 Internal Resistance
Hybrid/EV Battery Cell 15 Internal Resistance
Hybrid/EV Battery Cell 16 Internal Resistance
Hybrid/EV Battery Cell 17 Internal Resistance
Hybrid/EV Battery Cell 18 Internal Resistance
Hybrid/EV Battery Cell 19 Internal Resistance
Hybrid/EV Battery Cell 20 Internal Resistance
Hybrid/EV Battery Cell 21 Internal Resistance
Hybrid/EV Battery Cell 22 Internal Resistance
Hybrid/EV Battery Cell 23 Internal Resistance
Hybrid/EV Battery Cell 24 Internal Resistance
Hybrid/EV Battery Cell 25 Internal Resistance
Hybrid/EV Battery Cell 26 Internal Resistance
Hybrid/EV Battery Cell 27 Internal Resistance
Hybrid/EV Battery Cell 28 Internal Resistance
Hybrid/EV Battery Cell 29 Internal Resistance
Hybrid/EV Battery Cell 30 Internal Resistance
Hybrid/EV Battery Cell 31 Internal Resistance
Hybrid/EV Battery Cell 32 Internal Resistance
Hybrid/EV Battery Cell 33 Internal Resistance
Hybrid/EV Battery Cell 34 Internal Resistance
Hybrid/EV Battery Cell 35 Internal Resistance
Hybrid/EV Battery Cell 36 Internal Resistance
Hybrid/EV Battery Cell 37 Internal Resistance
Hybrid/EV Battery Cell 38 Internal Resistance
Hybrid/EV Battery Cell 39 Internal Resistance
Hybrid/EV Battery Cell 40 Internal Resistance
Hybrid/EV Battery Cell 41 Internal Resistance
Hybrid/EV Battery Cell 42 Internal Resistance
Hybrid/EV Battery Cell 43 Internal Resistance
Hybrid/EV Battery Cell 44 Internal Resistance
Hybrid/EV Battery Cell 45 Internal Resistance
Hybrid/EV Battery Cell 46 Internal Resistance
Hybrid/EV Battery Cell 47 Internal Resistance
Hybrid/EV Battery Cell 48 Internal Resistance
Hybrid/EV Battery Cell 49 Internal Resistance
Hybrid/EV Battery Cell 50 Internal Resistance
Hybrid/EV Battery Cell 51 Internal Resistance
Hybrid/EV Battery Cell 52 Internal Resistance
Hybrid/EV Battery Cell 53 Internal Resistance
Hybrid/EV Battery Cell 54 Internal Resistance
Hybrid/EV Battery Cell 55 Internal Resistance
Hybrid/EV Battery Cell 56 Internal Resistance

Result	Proceed to
"Hybrid/EV Battery Cell 1 to 56 Internal Resistance" is out of the specified range.	A
All values are not within the specified range.	B

(b) Turn the ignition switch off.

REPLACE HV BATTERY

DIAGNOSIS

(a) Confirm with the owner whether or not to perform "Prediagnostic Battery Charge" and "Battery Diagnosis".

HINT:

It takes about 2 hours to perform "Prediagnostic Battery Charge" and "Battery Diagnosis".
Depending on the Toyota Prius vehicle usage, it is possible to reuse the HV battery. However, if it is judged not possible to be reused, replace the HV battery.

Result	Proceed to
"Prediagnostic Battery Charge" and "Battery Diagnosis" is performed.	A
"Prediagnostic Battery Charge" and "Battery Diagnosis" is not performed.	B

REPLACE HV BATTERY

3.	PERFORM UTILITY (PREDIAGNOSTIC BATTERY CHARGE)

(a) Apply the parking brake and secure the wheels using chocks.

(b) Perform the "Prediagnostic Battery Charge".

Click here

NOTICE:

If the fuel level warning light is illuminated, add enough fuel that the light turns off, and then perform "Prediagnostic Battery Charge".
Perform HV battery charging with appropriate HV battery temperature, between 0°C (32°F) and 47°C (116.6°F).
Do not perform prediagnostic battery charge while the master warning is illuminated.
Perform prediagnostic battery charge with the HV battery installed correctly.
Do not perform prediagnostic battery charge while changing from inspection mode to another mode.

HINT:

If the HV battery temperature is low (below 0°C (32°F)), drive the Toyota Prius vehicle until the temperature reaches 0°C (32°F) or more and perform "Prediagnostic Battery Charge" again.
If the HV battery temperature is high (above 47°C (116.6°F)), leave the vehicle with the ignition switch ON (READY) and park (P) selected. Wait until the HV battery temperature drops to 43°C (109.4°F) or lower, and then perform "Prediagnostic Battery Charge" again.
If the HV battery temperature is low (below 0°C (32°F)) and the ignition switch cannot be turned to ON (READY), place the Toyota Prius vehicle in a warm environment (20°C (68°F) or higher). Wait until the HV battery temperature reaches 0°C (32°F) or higher, and then perform "Prediagnostic Battery Charge" again.

4.	PERFORM UTILITY (BATTERY DIAGNOSIS)

(a) Perform the "Battery Diagnosis".

Click here

NOTICE:

Perform this diagnosis with the engine coolant at -10°C (14°F) or more.
Perform HV battery diagnosis with appropriate HV battery temperature (between 0°C (32°F) and 47°C (116.6°F)).
Do not perform battery diagnosis while the master warning is illuminated.
Perform battery diagnosis with the HV battery installed correctly.
Do not perform battery diagnosis while changing from inspection mode to another mode.
The IG off timer function automatically turns the ignition switch off 10 minutes after the battery diagnosis completes. Make sure to confirm the diagnosis result as soon as possible.
Make sure to turn the ignition switch off after battery diagnosis to prevent the auxiliary battery from being discharged.
If differences among SOCs of each HV battery exceed the specifications, the master warning may illuminate when "Battery Diagnosis" is complete. In this case, check for hybrid system related DTCs. If DTC P300016 is output, leave the Toyota Prius vehicle with the ignition switch ON (READY) for 10 minutes or more allowing the vehicle to charge the HV battery. Then clear the DTCs.
If the vehicle is left with the ignition switch ON after battery diagnosis, the master warning may illuminate. If DTC P300000 is output, perform troubleshooting by following the inspection procedure for the DTC.
Wait 1 hours or more before turning the ignition switch to ON after the ignition switch is turned off. If the ignition switch is turned to ON shortly after battery diagnosis, the master warning may illuminate.

HINT:

As the "Battery Diagnosis" discharges the HV battery to a low SOC, if the ignition switch is turned to ON immediately after the "Battery Diagnosis" is completed, DTC P31AB16 (Hybrid Battery Cell Low Voltage) may be stored. For this reason, leave the Toyota Prius vehicle as is for 1 hours to allow the HV battery SOC to recover.

(b) Check the battery diagnosis result.

Result	Proceed to
OK ("There is no need to replace HV battery.")	A
NG (Replace the listed No. 1 or No. 2 HV supply stack sub-assembly)	B

REPLACE HV BATTERY

5.	CHARGE HV BATTERY

(a) Turn the ignition switch to ON (READY).

HINT:

Charge the HV battery with the ignition switch ON (READY) to recover the SOC after "Battery Diagnosis".
The READY indicator illuminates and the engine starts.

(b) Leave the Toyota Prius vehicle with the shift lever in P until the engine stops.

HINT:

The engine stops when the SOC of the HV battery reaches the specified amount.

END

ECU Power Source Circuit

DESCRIPTION

If the ignition switch is ON, the hybrid vehicle control ECU applies current to the MREL terminal to turn the IGCT relay on. This supplies power to the IGCT terminals.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.	CHECK BATTERY ECU ASSEMBLY (IGCT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Turn the ignition switch to ON.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-12 (IGCT) - Body ground	Ignition switch ON	11 to 14 V

NOTICE:

Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
If the ignition switch is turned to ON with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

(f) Turn the ignition switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Reconnect the battery ECU assembly connector.

GO TO STEP 3

2.	CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - BODY GROUND)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-10 (GND) - Body ground	Always	Below 1 Ω

(d) Reconnect the battery ECU assembly connector.

GO TO PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK FUSE (IGCT NO. 2)

(a) Remove the IGCT NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
IGCT NO. 2 fuse	Always	Below 1 Ω

GO TO STEP 6

4.	CHECK HARNESS AND CONNECTOR (NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - BATTERY ECU ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-12 (IGCT) - 2 (IGCT NO. 2 fuse holder)	Always	Below 1 Ω

(e) Install the IGCT NO. 2 fuse.

(f) Reconnect the battery ECU assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY)

(a) Remove the IGCT-MAIN NO. 1 relay and IGCT NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 (IGCT-MAIN NO. 1 relay holder) - 1 (IGCT NO. 2 fuse holder)	Always	Below 1 Ω

CHECK ECU Power Source Circuit (HYBRID CONTROL SYSTEM)

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - BATTERY ECU ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect the battery ECU assembly connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Click Location & Routing(R40) Click Connector(R40)

Tester Connection	Condition	Specified Condition
R40-12 (IGCT) or 2 (IGCT NO. 2 fuse holder) - Body ground and other terminals	Always	10 kΩ or higher

(e) Install the IGCT NO. 2 fuse.

(f) Reconnect the battery ECU assembly connector.

REPLACE FUSE (IGCT NO. 2)

7.	REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE FUSE (IGCT NO. 2)

Hv Relay Assembly (for Phev Model)Hybrid Battery System (for M20a-fxs)

Toyota Prius (XW60) 2023-2025 Service Manual

Hybrid Battery System (for 2zr-fxe)

Precaution
Definition Of Terms
Parts Location
How To Proceed With Troubleshooting
Utility
Terminals Of Ecu
Diagnosis System
Dtc Check / Clear
Freeze Frame Data
Vehicle Behavior Chart
Data List / Active Test
Registration / Initialization / Learning
VEHICLE CONTROL HISTORY (RoB)
System Voltage (BATT) Circuit Short to Ground or Open (P056014)
Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)
Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground (P0A8111,P0A814B)
Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)
High Voltage Fuse Accumulated Load History (P0A9563)
Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)
Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range (P0A9B1C,P0AC51C,P0ACA1C,P0AE81C,P0BC21C,P0C331C)
Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range (P0A9B2A,P0AC52A,P0ACA2A,P0AE82A,P0BC22A,P0C332A,P306562,P306A62)
Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground (P0AAC11,P0AAC15)
Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P0B0E11,P0B0E15,P1CBB12,P1CBB14)
Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure (P0ABF28)
Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)
Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure (P0B1362)
Hybrid/EV Battery State of Charge High (P0C3000)
Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance (P0E2D00)
Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold (P1A6017,P31AA17)
Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold (P1A6116,P31AB16)
Hybrid/EV Battery Stack 1 Delta SOC High (P1A8000,P1A8500)
Hybrid/EV Battery Stack 1 Delta SOC High (Extreme) (P1A8100,P1A8600)
System Voltage (AM) Circuit Voltage Below Threshold (P1AFC00)
Flying Capacitor Circuit Voltage Out of Range (P1AFD00)
Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range (P1AFD1C)
Hybrid/EV Battery ECU Multiple Reset (P1AFF00)
High Voltage Power Resource Internal Electronic Failure (P1C8549)
Hybrid/EV Battery Stack 1 Voltage Difference Out of Range (P1CC81E,P1CC91E)
Hybrid/EV Battery Discharge Control Malfunction (P300000)
Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)
Hybrid/EV Battery Control System Over Temperature (P30004B)
Hybrid/EV Battery Voltage High (P31B300)
Extreme Hybrid/EV Battery Charging Current (P31B400)
Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)
Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold (P33E01B,P33E11B)
Hybrid/EV Battery Stack 1 Capacity Decline (P33E600,P33E700)
(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold (P33EC16,P33ED16)
Lost Communication with ECM/PCM "A" Missing Message (U010087)
Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message (U115087)
"HAVE TRACTION BATTERY INSPECTED" is displayed
ECU Power Source Circuit

Actual pages

Beginning midst our that fourth appear above of over, set our won’t beast god god dominion our winged fruit image

Temperature Displayed	Malfunction
Below -45°C (-49°F)	Open or B short circuit
95°C (203°F) or more	GND short circuit

*a	Dealer
*b	Battery Collection Agent

Toyota Prius: Hybrid Battery System (for 2zr-fxe)

Precaution

Definition Of Terms

Parts Location

How To Proceed With Troubleshooting

Utility

Terminals Of Ecu

Diagnosis System

Dtc Check / Clear

Freeze Frame Data

Vehicle Behavior Chart

Data List / Active Test

Registration / Initialization / Learning

VEHICLE CONTROL HISTORY (RoB)

System Voltage (BATT) Circuit Short to Ground or Open (P056014)

Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground (P0A8111,P0A814B)

Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)

High Voltage Fuse Accumulated Load History (P0A9563)

Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground (P0A9B11,...,P0C3315)

Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range (P0A9B1C,P0AC51C,P0ACA1C,P0AE81C,P0BC21C,P0C331C)

Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range (P0A9B2A,P0AC52A,P0ACA2A,P0AE82A,P0BC22A,P0C332A,P306562,P306A62)

Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground (P0AAC11,P0AAC15)

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P0B0E11,P0B0E15,P1CBB12,P1CBB14)

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure (P0ABF28)

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)

Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure (P0B1362)

Hybrid/EV Battery State of Charge High (P0C3000)

Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance (P0E2D00)

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold (P1A6017,P31AA17)

Hybrid/EV Battery Stack 2 Cell Circuit Voltage Below Threshold (P1A6116,P31AB16)

Hybrid/EV Battery Stack 1 Delta SOC High (P1A8000,P1A8500)

Hybrid/EV Battery Stack 1 Delta SOC High (Extreme) (P1A8100,P1A8600)

System Voltage (AM) Circuit Voltage Below Threshold (P1AFC00)

Flying Capacitor Circuit Voltage Out of Range (P1AFD00)

Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range (P1AFD1C)

Hybrid/EV Battery ECU Multiple Reset (P1AFF00)

High Voltage Power Resource Internal Electronic Failure (P1C8549)

Hybrid/EV Battery Stack 1 Voltage Difference Out of Range (P1CC81E,P1CC91E)

Hybrid/EV Battery Discharge Control Malfunction (P300000)

Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)

Hybrid/EV Battery Control System Over Temperature (P30004B)

Hybrid/EV Battery Voltage High (P31B300)

Extreme Hybrid/EV Battery Charging Current (P31B400)

Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)

Hybrid/EV Battery Stack 1 Circuit Resistance Above Threshold (P33E01B,P33E11B)

Hybrid/EV Battery Stack 1 Capacity Decline (P33E600,P33E700)

(Extreme) Hybrid/EV Battery Stack 1 Cell Circuit Voltage Below Threshold (P33EC16,P33ED16)

Lost Communication with ECM/PCM "A" Missing Message (U010087)

Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message (U115087)

"HAVE TRACTION BATTERY INSPECTED" is displayed

ECU Power Source Circuit

Toyota Prius (XW60) 2023-2025 Service Manual

Hybrid Battery System (for 2zr-fxe)

Actual pages

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