Toyota Prius: Driver Monitor Camera System

Toyota Prius (XW60) 2023-2025 Service Manual / ADAS/AD / Advanced Driver Assistance System / Driver Monitor Camera System

Precaution
Parts Location
System Diagram
How To Proceed With Troubleshooting
Utility
Problem Symptoms Table
Terminals Of Ecu
Freeze Frame Data
Data List / Active Test
VEHICLE CONTROL HISTORY (RoB)
Driver Monitor Camera Control System Internal Power Supply Failure (C1A3000,C1A3504,C1A3604)
Driver Monitor Camera Control System Bus Signal / Message Failure (C1A3108,C1A3187)
Driver Monitor Camera Component Internal Failure (C1A3196)
LED Controller in Driver Monitor Camera Control System Actuator Stuck (C1A3471)
Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U029387)
Software Incompatibility with Body Control Module Not Programmed (U032251,U032257)

Precaution

PRECAUTION

PRECAUTIONS FOR DISCONNECTING CABLE FROM NEGATIVE (-) AUXILIARY BATTERY TERMINAL

NOTICE:

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

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

PRECAUTIONS FOR DRIVER MONITOR CAMERA SYSTEM

(a) In the following situations, it may not be possible to recognize the driver's face, or to detect the driver's facial direction, line-of-sight, whether their eyes are open or closed, etc.

(1) When sunlight is shining on the driver monitor camera in the cabin.

(2) When sunlight is shining on the driver's face.

(3) When the cabin light level changes between sunlight and shadow repeatedly.

(4) When the eyes, nose, mouth and contours of the face are hidden, and the characteristic points of the face cannot be recognized.

(5) When the driver is wearing eyeglasses.

(6) When the driver is wearing sunglasses that do not allow infrared light to pass through easily.

(7) When the driver is wearing a mask.

(8) When the driver is wearing circle contact lenses (to make the iris appear larger).

(9) When the driver's eyes are hidden by eyeglass frames, hair, etc., and the driver's eyes cannot be detected.

(10) When light reflected on the lenses of a pair of eyeglasses or sunglasses blocks the eyes.

(11) When the driver is wearing an eyepatch.

(12) When the driver is wearing a hat low over the eyes.

(13) When makeup prevents the characteristic points such as the eyes, mouth and contours of the face from being recognized.

(14) When there are 2 or more faces in and around the driver seat, such as when a passenger in the passenger seat or rear seat leans toward the driver seat.

(15) When the driver's hand on the steering wheel covers the face.

(16) When the driver's driving posture is abnormal, such as when leaning forward or sticking their face out the window.

(17) When the driver moves outside the viewing angle of the driver monitor camera, and the characteristic points of the face can no longer be detected.

(18) When the driver narrows their eyes when laughing or because of dazzling bright light.

(19) When the installation position becomes significantly slanted due to unexpected contact or impact to the driver monitor camera.

(20) When the temperature of the driver monitor camera is high.

(21) When the lens cover surface of the driver monitor camera is dirty or damaged.

(22) When there is an obstruction between the driver monitor camera and the driver's face.

(23) When the driver is wearing an eye mask or a mask with eyes drawn on it.

PRECAUTIONS WHEN REPLACING PARTS

(a) When replacing the driver monitor ECU assembly, make sure to replace it with a new one.

HANDLING AND SERVICE PRECAUTIONS

(a) After removing and installing any ECUs or sensors, make sure to check for DTCs and confirm that no DTCs are output.

(b) Observe all the following precautions when handling the driver monitor camera since it is a precision instrument.

(1) Do not subject the driver monitor camera to a strong impact or force.

(2) Do not disassemble the driver monitor camera.

(3) When replacing, etc. the driver monitor camera, never touch the surface of the driver monitor camera.

NOTICE:

If the surface of the driver monitor camera is touched, wipe it with a soft, dry cloth.

(4) Do not use detergent or organic solvent which could corrode resin on the driver monitor camera.

PRECAUTION FOR SURROUNDING PARTS OF DRIVER MONITOR CAMERA

(a) Do not attach stickers or install accessories to the front surface or other surfaces of the driver monitor camera.

HINT:

If installation cannot be avoided, make sure it does not overlap on the front surface of the driver monitor camera.
This may affect the visual field of the driver monitor camera and the driver monitor may not operate normally.

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	FORWARD RECOGNITION CAMERA	*2	ECM
*3	POWER STEERING ECU ASSEMBLY	*4	NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

ILLUSTRATION

*1	DRIVER MONITOR CAMERA	*2	STEERING SENSOR
*3	DRIVER MONITOR ECU ASSEMBLY	*4	COMBINATION METER ASSEMBLY
*5	AIRBAG ECU ASSEMBLY	*6	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*7	HYBRID Toyota Prius Vehicle CONTROL ECU	*8	DLC3

System Diagram

SYSTEM DIAGRAM

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the driver monitor camera system.
*: Use the GTS.

PROCEDURE

1.	Toyota Prius Vehicle BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points for problem analysis:

What	Toyota Prius Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

PRE-CHECK

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

Standard voltage:

11 to 14 V

HINT:

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

(b) Check the fuses and relays.

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

4.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the GTS, check for CAN communication system DTCs.

for HEV Model: Click here

for PHEV Model: Click here

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

for HEV Model: Click here

for PHEV Model: Click here

5.	CHECK DTC*

(a) Check for DTCs and note any codes that are output.

Chassis > Driver Monitor Camera Control > Trouble Codes

(b) Clear the DTCs.

Chassis > Driver Monitor Camera Control > Clear DTCs

Chassis > Driver Monitor Camera Control > Trouble Codes

Result	Proceed to
DTCs are not output (Fault can be simulated)	A
DTCs are not output (Fault cannot be simulated)	B
DTCs are output.	C

USE SIMULATION METHOD TO CHECK

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	CHECK FOR Toyota Prius Vehicle CONTROL HISTORY (RoB)*

(a) Check for vehicle control history (RoB) and note any codes that are output.

Chassis > Driver Monitor Camera Control > Utility

Tester Display
Toyota Prius Vehicle Control History (RoB)

(b) If the vehicle control history (RoB) is output, record it.

Result	Proceed to
Toyota Prius Vehicle control history (RoB) is not output	A
Vehicle control history (RoB) is output	B

GO TO Toyota Prius Vehicle CONTROL HISTORY (RoB)

7.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

8.	PERFORM TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Refer to Terminals of ECU.

Click here

9.	ADJUST, REPAIR OR REPLACE

10.	CONFIRMATION TEST

END

Utility

UTILITY

HINT:

It is possible to use the GTS to check whether or not DTC judgment has been completed.
This procedure may be used to confirm whether DTCs are output after simulating malfunction symptoms or after finishing repairs.

ALL READINESS

(a) Using the GTS, clear the DTCs.

(Even if no DTC is output, perform the clear operation)

Chassis > Driver Monitor Camera Control > Clear DTCs

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

(d) Perform "All Readiness" according to the display on the GTS.

Chassis > Driver Monitor Camera Control > Utility

Tester Display
All Readiness

(e) Input the DTC to be confirmed.

(f) 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
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit Perform the driving pattern

If the judgment result shows Incomplete or N/A, perform the DTC confirmation driving pattern again.

(g) Turn the ignition switch off.

IMAGE INFORMATION CLEAR

HINT:

This deletes stored image data.

(a) Perform "Image Information Clear" according to the display on the GTS.

Chassis > Driver Monitor Camera Control > Utility

Tester Display
Image Information Clear

IMAGE RECORD SETTING

HINT:

This changes the settings for storing image data.

(a) Perform "Image Record Setting" according to the display on the GTS.

Chassis > Driver Monitor Camera Control > Utility

Tester Display
Image Record Setting

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

Driver Monitor Function

Symptom	Suspected Area	Link
The system cannot detect the driver's face correctly	Using the Data List, check that "Face Detection Status" is "Detected".
	Using the Data List, check that the standard for the "Facial Direction" output value when the driver is facing forward is within the normal range.
	Driver monitor camera
	Driver monitor ECU assembly
The system cannot detect the driver's line of sight correctly	Using the Data List, check that "Sunglasses Detection Status" is "Not Detected"
	Using the Data List, check that the standard for the "Eye Direction Angle" output value when the driver is facing forward is within the normal range.
	Driver monitor camera
	Driver monitor ECU assembly

Terminals Of Ecu

TERMINALS OF ECU

DRIVER MONITOR ECU ASSEMBLY

(a) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
K93-3 (LS) - Body ground	LED ground	Always	Below 1 Ω
K93-4 (LP) - Body ground	LED power source	Ignition switch ON	6 to 9 V
K93-5 (CANH) - Body ground	CAN communication signal	Ignition switch off → Ignition switch ON	Below 1 V → Pulse generation
K93-6 (CANL) - Body ground	CAN communication signal	Ignition switch off → Ignition switch ON	Below 1 V → Pulse generation
K93-7 ( B) - Body ground	Auxiliary battery power source	Ignition switch off	11 to 14 V
K93-8 (GND) - Body ground	Ground	Always	Below 1 Ω
K131-1 (GND) - Body ground	Ground	Always	Below 1 Ω
K131-2 ( B) - Body ground	Camera power source	Ignition switch ON	4.75 to 5.25 V
K131-3 (LVDS ) - Body ground	Video signal	Ignition switch ON	Waveform in accordance with video signal
K131-4 (LVDS-) - Body ground	Video signal	Ignition switch ON	Waveform in accordance with video signal
K131-5 (SGND) - Body ground	Shield ground	Always	Below 1 Ω

DRIVER MONITOR CAMERA

(a) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
K92-1 (LP)	LED power source	Ignition switch ON	6 to 9 V
K92-2 (LS)	LED ground	Always	Below 1 Ω
K132-1 (GND)	Ground	Always	Below 1 Ω
K132-2 ( B)	Camera power source	Ignition switch ON	4.75 to 5.25 V
K132-3 (LVDS )	Video signal	Ignition switch ON	Waveform in accordance with video signal
K132-4 (LVDS-)	Video signal	Ignition switch ON	Waveform in accordance with video signal
K132-5 (SGND)	Shield ground	Always	Below 1 Ω

Freeze Frame Data

FREEZE FRAME DATA

DESCRIPTION

(a) When a driver monitor camera system DTC is stored, the driver monitor ECU assembly stores the current vehicle (ECU or sensor) state as Freeze Frame Data.

CHECK FREEZE FRAME DATA

(a) Select a DTC to display the freeze frame data.

Chassis > Driver Monitor Camera Control > Trouble Codes

FREEZE FRAME DATA CHART

(a) Check the freeze frame data for the output DTC.

Chassis > Driver Monitor Camera Control

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Total Distance Traveled	The total distance traveled	0 to 16777215	The total distance traveled	-
Total Distance Traveled - Unit	The units used when displaying the total distance traveled	km or mile	Units for total distance traveled	-
Voltage A/D Converted Value	Internal voltage value	0.00 to 19.99 V	12 to 14 V	-
Camera Module Initialization Failure	Initialization malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Image Sensor Pattern Check Failure	Output pattern malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Camera Communication Failure	Communication malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Vertical Synchronizing signal Failure	Output signal malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
I2C Communication Failure	Communication malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Video Import Failure	Input signal malfunction from driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Camera Communication Initialization Failure	Communication initialization malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
A/D Conversion Failure	Internal voltage malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Communication Failure Between Microcomputers (Monitoring -> Processing)	Internal communication malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
ECU Temperature Monitoring Circuit Failure	Internal temperature malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Data Flash Control Area Corruption	Storage area malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Communication Failure Between Microcomputers (Processing -> Monitoring)	Internal ECU malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Processing Microcomputer Stop Failure	Internal ECU malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Floating Point Register Failure	Internal ECU malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Deserializer Initialization Failure	Communication malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Video Stuck Failure	Internal image stuck malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
LED Failure 1	LED malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 1	Internal power source malfunction for driver monitor (system 1)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 2	Internal power source malfunction for driver monitor (system 2)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 3	Internal power source malfunction for driver monitor (system 3)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 4	Internal power source malfunction for driver monitor (system 4)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 5	Internal power source malfunction for driver monitor (system 5)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 6	Internal power source malfunction for driver monitor (system 6)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-

Data List / Active Test

DATA LIST / ACTIVE TEST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

DATA LIST

(a) Read the Data List according to the display on the GTS.

Chassis > Driver Monitor Camera Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Total Distance Traveled	The total distance traveled	0 to 16777215	The total distance traveled	-
Total Distance Traveled - Unit	The units used when displaying the total distance traveled	km or mile	Units for total distance traveled	-
Face Detection Status	Face detection condition	Not detected or Detected	Not detected: Face is not detected Detected: Face is detected	-
Sunglasses Detection Status	IR-blocking sunglasses detection condition	Not detected or Detected	Not detected: IR-blocking sunglasses not detected Detected: IR-blocking sunglasses detected	-
Face Mask Detection Status	Mask detection condition	Not detected or Detected	Not detected: Mask is not detected Detected: Mask is detected	-
Glasses Detection Status	Eyeglasses detection condition	Not detected or Detected	Not detected: Eyeglasses are not detected Detected: Eyeglasses are detected	-
Face Undetection Factor	Reason why face is not detected	Clean/No Backlight, Unclean/No Backlight, Clean/With Backlight or Unclean/With Backlight	Clean/No Backlight: When there is no dirt and backlight Unclean/No Backlight: When there is dirt but no backlight Clean/With Backlight: When there is no dirt but backlight Unclean/With Backlight: When there is dirt and backlight	-
Voltage A/D Converted Value	Internal voltage value	0.00 to 19.99 V	12 to 14 V	-
Driver Monitor Camera Control Processing Mode	Processing mode for driver monitor camera control	Initial Face Detection, Face in Pursuit, Face in Detection or Face in Re-Pursuit	Initial Face Detection: When performing initial face detection Face in Pursuit: When tracking face Face in Detection: When detecting face Face in Re-Pursuit: When performing facial tracking again	-
Upper Part of the Face Missing Decision	Judgment of upper face cutoff	OFF or ON	OFF: When the driver's upper face is not cutoff ON: When the driver's upper face is cutoff	If "ON", adjust the driver position so that the driver's face is detected correctly
Lower Part of the Face Missing Decision	Judgment of lower face cutoff	OFF or ON	OFF: When the driver's lower face is not cutoff ON: When the driver's lower face is cutoff	If "ON", adjust the driver position so that the driver's face is detected correctly
Face Direction (Vertical)	Direction of the face (vertical)	-128 to 127 deg	Value according to the viewing angle (vertical) is output	The standard for the output value when the driver is facing forward is 5 to 30 deg
Face Direction (Horizontal)	Viewing angle (horizontal)	-128 to 127 deg	Value according to the viewing angle (horizontal) is output	The standard for the output value when the driver is facing forward is -15 to 15 deg
Face Direction (Tilt Head)	Direction of the face (neck inclination)	-128 to 127 deg	Value according to the direction of the face (neck inclination) is output	The standard for the output value when the driver is facing forward is -15 to 15 deg
Eyes Openness	Opening angle (distance between upper and lower lids) of both eyes	0 to 25.5 mm (0 to 1.0 in.)	Value according to the opening angle (distance between upper and lower lids) of both eyes is output	-
Eyes Openness (1 Frame Before)	Opening angle (distance between upper and lower lids) of both eyes 1 frame prior	0 to 25.5 mm (0 to 1.0 in.)	Value according to the opening angle (distance between upper and lower lids) of both eyes 1 frame prior is output	-
Eyes Openness (2 Frames Before)	Opening angle (distance between upper and lower lids) of both eyes 2 frames prior	0 to 25.5 mm (0 to 1.0 in.)	Value according to the opening angle (distance between upper and lower lids) of both eyes 2 frames prior is output	-
Eyes Open Close Judgement	Results of judging whether both eyes are open/closed	Unable to Judge, Open or Close	Unable to Judge: When judgment is impossible Open: When both eyes are open Close: When both eyes are closed	-
Eyes Open Close Judgement (1 Frame Before)	Results of judging whether both eyes are open/closed 1 frame prior	Unable to Judge, Open or Close	Unable to Judge: When judgment is impossible Open: When both eyes are open Close: When both eyes are closed	-
Eyes Open Close Judgement (2 Frames Before)	Results of judging whether both eyes are open/closed 2 frames prior	Unable to Judge, Open or Close	Unable to Judge: When judgment is impossible Open: When both eyes are open Close: When both eyes are closed	-
Eye Direction Angle (Vertical)	Viewing angle (vertical)	-128 to 127 deg	Value according to the viewing angle (vertical) is output	The standard for the output value when the driver is facing forward is 5 to 30 deg
Eye Direction Angle (Horizontal)	Viewing angle (horizontal)	-128 to 127 deg	Value according to the viewing angle (horizontal) is output	The standard for the output value when the driver is facing forward is -15 to 15 deg
Eye Focus Point Position (Horizontal)	Eye focus point position (horizontal direction)	-8 to 7	Value according to the eye focus point position (horizontal) is output	-
Eye Focus Point Position (Vertical)	Eye focus point position (vertical direction)	-8 to 7	Value according to the eye focus point position (vertical) is output	-
Mouth Openness	Opening angle of the driver's mouth	0 to 255 mm (0 to 10.0 in.)	Value according to the mouth opening angle is output	-
Half Opened Eye Condition	Results of detecting eyes half open condition	Not Detected or Detected	Not Detected: When eyes half open is not detected Detected: When eyes half open is detected	-
Half Opened Eye Condition (1 Frame Before)	Results of detecting eyes half open condition 1 frame prior	Not Detected or Detected	Not Detected: When eyes half open is not detected Detected: When eyes half open is detected	-
Half Opened Eye Condition (2 Frames Before)	Results of detecting eyes half open condition 2 frames prior	Not Detected or Detected	Not Detected: When eyes half open is not detected Detected: When eyes half open is detected	-
Face Position (X axis)	Position of the face (X axis)	-128 to 127 cm (-4.20 to 4.17 ft.)	Value according to the position of the face (horizontal) is output	-
Face Position (Y axis)	Position of the face (Y axis)	-128 to 127 cm (-4.20 to 4.17 ft.)	Value according to the position of the face (vertical) is output	-
Face Position (Z axis)	Position of the face (Z axis)	0 to 255 cm (0 to 8.36 ft.)	Value according to the position of the face (neck inclination) is output	-
Face Direction Angle Calculation Reliability	Reliability of calculating the angle of the facial direction	Very Low, Low, Middle or High	Very Low: When the reliability is extremely low Low: When the reliability is low Middle: When the reliability is slightly low High: When the reliability is high	-
Eye Direction Angle Calculation Reliability	Reliability of calculating the viewing angle	Very Low, Low, Middle or High	Very Low: When the reliability is extremely low Low: When the reliability is low Middle: When the reliability is slightly low High: When the reliability is high	If the driver is wearing eyeglasses and reliability drops, LED light from the driver monitor may be reflected on the eyeglasses resulting in incorrect judgment (false warning)
Eye Openness Calculation Reliability	Reliability of calculating the eye opening angle (distance between upper and lower lids)	Very Low, Low, Middle or High	Very Low: When the reliability is extremely low Low: When the reliability is low Middle: When the reliability is slightly low High: When the reliability is high	-
Eye Openness Calculation Reliability (1 Frame Before)	Reliability of calculating the eye opening angle (distance between upper and lower lids) 1 frame prior	Very Low, Low, Middle or High	Very Low: When the reliability is extremely low Low: When the reliability is low Middle: When the reliability is slightly low High: When the reliability is high	-
Eye Openness Calculation Reliability (2 Frames Before)	Reliability of calculating the eye opening angle (distance between upper and lower lids) 2 frames prior	Very Low, Low, Middle or High	Very Low: When the reliability is extremely low Low: When the reliability is low Middle: When the reliability is slightly low High: When the reliability is high	-
Front Gaze Status	Whether the driver is looking frontward	0 to 7	0: Not detected 1: Not Front 1 (When driver is looking somewhere other than the front area) 2: Not Front 2 (When driver is looking somewhere other than the front area) 3: Not Front 3 (When driver is looking somewhere other than the front area) 4: Front 1 (When driver is looking toward front area) 5: Front 2 (When driver is looking toward front area) 6: Front 3 (When driver is looking toward front area) 7: Front 4 (When driver is looking toward front area)	-
Lost Face Warning Level	Determined that driver's face cannot be seen	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Inattentive Driving Warning Level	Judgment that driver is inattentive	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Closed Eyes Warning Level	Judgment that driver's eyes are closed	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Careless Driving Warning Level	Judgment that driver is driving carelessly	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Poor Posture Warning Level	Judgment that driver's posture is poor	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Driver Abnormality Warning Level	Judgment that the driver's condition is abnormal	OFF, ON(Level1), ON(Level2) or ON(Level3)	OFF: Not detected ON (Level1): Status has continued ON (Level2): Status has continued longer than Level 1 ON (Level3): Status has continued longer than Level 2	-
Face Direction Zero Point Learning Value (Vertical)	Face direction zero point learning value (vertical direction)	-128 to 127 deg	Output judgment of driver's straight-ahead position	-
Face Direction Zero Point Learning Value (Horizontal)	Face direction zero point learning value (horizontal direction)	-128 to 127 deg	Output judgment of driver's straight-ahead position	-
Face Direction Zero Point Learning Value (Tilt Head)	Face direction zero point learning value (tilt head direction)	-128 to 127 deg	Output judgment of driver's straight-ahead position	-
Face Position Zero Point Learning Value (X axis)	Face direction zero point learning value (x direction)	-32768 to 32767 cm (-1074.79 to 1074.76 ft.)	Output judgment of driver's straight-ahead position	-
Face Position Zero Point Learning Value (Y axis)	Face direction zero point learning value (y direction)	-32768 to 32767 cm (-1074.79 to 1074.76 ft.)	Output judgment of driver's straight-ahead position	-
Face Position Zero Point Learning Value (Z axis)	Face direction zero point learning value (z direction)	-32768 to 32767 cm (-1074.79 to 1074.76 ft.)	Output judgment of driver's straight-ahead position	-
Camera Module Initialization Failure	Initialization malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Image Sensor Pattern Check Failure	Output pattern malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Camera Communication Failure	Communication malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Vertical Synchronizing signal Failure	Output signal malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
I2C Communication Failure	Communication malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Video Import Failure	Input signal malfunction from driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Camera Communication Initialization Failure	Communication initialization malfunction for driver monitor camera	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
A/D Conversion Failure	Internal voltage malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Communication Failure Between Microcomputers (Monitoring -> Processing)	Internal communication malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
ECU Temperature Monitoring Circuit Failure	Internal temperature malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Data Flash Control Area Corruption	Storage area malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Communication Failure Between Microcomputers (Processing -> Monitoring)	Internal communication malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Processing Microcomputer Stop Failure	Internal ECU malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Floating Point Register Failure	Internal ECU malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Deserializer Initialization Failure	Communication malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Video Stuck Failure	Internal image stuck malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
LED Failure 1	LED malfunction for driver monitor	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 1	Internal power source malfunction for driver monitor (system 1)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 2	Internal power source malfunction for driver monitor (system 2)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 3	Internal power source malfunction for driver monitor (system 3)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 4	Internal power source malfunction for driver monitor (system 4)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 5	Internal power source malfunction for driver monitor (system 5)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Internal Power Supply Failure System 6	Internal power source malfunction for driver monitor (system 6)	No or Yes	No: Malfunction not detected Yes: Malfunction detected	-
Plus Support Driver Classification	Result of Plus Support mode applicability judgment	Normal or Plus Support	Normal: Not a Plus Support user Plus Support: Plus Support user	-
Driver Seat User Number	Which user was detected by personal identification	Nothing, User1, User2, User3 or Guest	Nothing: Not identified User1: Identified as registered user 1 User2: Identified as registered user 2 User3: Identified as registered user 3 Guest: Identified as guest	-

VEHICLE CONTROL HISTORY (RoB)

VEHICLE CONTROL HISTORY (RoB)

NOTICE:

When checking the vehicle control history (RoB), make sure to record the output histories.

CHECK VEHICLE CONTROL HISTORY (RoB)

(a) Read the Vehicle Control History (RoB) according to the display on the GTS.

Chassis > Driver Monitor Camera Control > Utility

Tester Display
Toyota Prius Vehicle Control History (RoB)

Vehicle Control History (RoB)

Multi-information Display	Code	Tester Display	Measurement Item	Diagnostic Note
-	X20B3	Driver Monitor Camera Control System IG Voltage Low	History stored when an IG terminal voltage drop malfunction (10 V or less) is detected	Charge the auxiliary battery. Drive the Toyota Prius vehicle while the auxiliary battery voltage is normal. HINT: Returns to normal when the IG voltage returns to within a normal value (11 to 16 V). If an IG terminal voltage malfunction is detected, the traffic jam assist will be temporarily unavailable.
-	X20B4	Driver Monitor Camera Control System IG Voltage High	History stored when an IG terminal voltage increase malfunction (17 V or higher) is detected
Driver Monitor Out of Temperature Range Wait until Normal Temperature	X20B5	Driver Monitor Camera Control System Outside Guaranteed Operating Temperature	History stored when a driver monitor ECU assembly temperature malfunction (100°C [212°F]) is detected	Avoid leaving the Toyota Prius vehicle in high temperature for a long time. Use air conditioning, etc., to decrease the vehicle interior temperature. HINT: Returns to normal when the temperature returns to within a normal value (90°C [194°F] or less). If there is a temperature malfunction, the traffic jam assist will be temporarily unavailable.
Driver Monitor Out of Temperature Range Wait until Normal Temperature	X20B6	Driver Monitor Camera Outside Guaranteed Operating Temperature	History stored when a driver monitor camera temperature malfunction (90°C [194°F]) is detected	Avoid leaving the Toyota Prius vehicle in high temperature for a long time Use air conditioning, etc., to decrease the vehicle interior temperature HINT: Returns to normal when the temperature returns to within a normal value (80°C [176°F] or less). If there is a temperature malfunction, the traffic jam assist will be temporarily unavailable.
Driver Monitor Unavailable See Owner's Manual	X20B7	Driver Monitor Camera Temporarily Not Face Detection	History of being unable to detect the driver's face continuously for 30 minutes or longer at a Toyota Prius vehicle speed of 5 km/h (3 mph) or higher	If there are any fingerprints or dirt on the camera surface, wipe it clean with a soft cloth. Using the Data List, check that "Face Detection Status" is "Detected". HINT: Returns to normal when the driver's face can be detected. If the driver's face cannot be recognized, the traffic jam assist will be temporarily unavailable.

NOTICE:

By performing this procedure, all stored Toyota Prius Vehicle Control History (RoB) items will be cleared.

CLEAR VEHICLE CONTROL HISTORY (RoB)

(a) According to the display on the GTS, clear the Vehicle Control History (RoB).

Chassis > Driver Monitor Camera Control > Utility

Tester Display
Toyota Prius Vehicle Control History (RoB)

Driver Monitor Camera Control System Internal Power Supply Failure (C1A3000,C1A3504,C1A3604)

DESCRIPTION

This DTC is output if driver monitor ECU assembly self-diagnosis detects an internal malfunction in the driver monitor ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
C1A3000	Driver Monitor Camera Control System Internal Power Supply Failure	When an internal power source malfunction is detected in the driver monitor ECU assembly	Driver monitor ECU assembly	Driver Monitor Camera Control	A
C1A3504	Processing Microcomputer in Driver Monitor Camera Control System System Internal Failure	When a processing microcomputer malfunction occurs in the driver monitor ECU assembly	Driver monitor ECU assembly	Driver Monitor Camera Control	A
C1A3604	Monitoring Microcomputer in Driver Monitor Camera Control System Internal Failure	When a monitoring microcomputer malfunction is detected in the driver monitor ECU assembly	Driver monitor ECU assembly	Driver Monitor Camera Control	A

PROCEDURE

1.	REPLACE DRIVER MONITOR ECU ASSEMBLY

HINT:

Click here

END

Driver Monitor Camera Control System Bus Signal / Message Failure (C1A3108,C1A3187)

DESCRIPTION

This DTC is output if driver monitor ECU assembly self-diagnosis detects an open circuit of the input and output signal lines to the driver monitor camera.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
C1A3108	Driver Monitor Camera Control System Bus Signal / Message Failure	When an LVDS communication lost between the driver monitor camera and driver monitor ECU assembly is detected	Harness or connector Driver monitor camera Driver monitor ECU assembly	Driver Monitor Camera Control	A
C1A3187	Driver Monitor Camera Missing Message	When an LVDS communication lost between the driver monitor camera and driver monitor ECU assembly is detected	Harness or connector Driver monitor camera Driver monitor ECU assembly	Driver Monitor Camera Control	A

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (DRIVER MONITOR ECU ASSEMBLY - DRIVER MONITOR CAMERA)

Pre-procedure1

(a) Disconnect the K131 driver monitor ECU assembly connector.

(b) Disconnect the K132 driver monitor camera connector.

Procedure1

Standard Resistance:

Click Location & Routing(K131,K132) Click Connector(K131) Click Connector(K132)

Tester Connection	Condition	Specified Condition	Result
K131-1 (GND) - K132-1 (GND)	Always	Below 1 Ω	Ω
K131-2 ( B) - K132-2 ( B)	Always	Below 1 Ω	Ω
K131-3 (LVDS ) - K132-3 (LVDS )	Always	Below 1 Ω	Ω
K131-4 (LVDS-) - K132-4 (LVDS-)	Always	Below 1 Ω	Ω
K131-1 (GND) - Body ground	Always	10 kΩ or higher	kΩ
K131-2 ( B) - Body ground	Always	10 kΩ or higher	kΩ
K131-3 (LVDS ) - Body ground	Always	10 kΩ or higher	kΩ
K131-4 (LVDS-) - Body ground	Always	10 kΩ or higher	kΩ
K131-5 (SGND) - Body ground	Always	10 kΩ or higher	kΩ

Post-procedure1

(d) None

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	REPLACE DRIVER MONITOR CAMERA

HINT:

Click here

CLEAR DTC

(a) Clear the DTCs.

Chassis > Driver Monitor Camera Control > Clear DTCs

4.	CHECK FOR DTC

(a) Check for DTCs.

Chassis > Driver Monitor Camera Control > Trouble Codes

Result	Proceed to
DTCs are not output	A
C1A3108 or C1A3187 is output	B

END (DRIVER MONITOR CAMERA IS DEFECTIVE)

REPLACE DRIVER MONITOR ECU ASSEMBLY

Driver Monitor Camera Component Internal Failure (C1A3196)

DESCRIPTION

This DTC is output if driver monitor ECU assembly self-diagnosis detects a malfunction in the driver monitor camera.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
C1A3196	Driver Monitor Camera Component Internal Failure	An internal malfunction in the driver monitor camera parts is detected	Driver monitor camera	Driver Monitor Camera Control	A

PROCEDURE

1.	REPLACE DRIVER MONITOR CAMERA

HINT:

Click here

END

LED Controller in Driver Monitor Camera Control System Actuator Stuck (C1A3471)

DESCRIPTION

This DTC is output if driver monitor ECU assembly self-diagnosis detects an LED circuit malfunction in the driver monitor camera.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
C1A3471	LED Controller in Driver Monitor Camera Control System Actuator Stuck	An LED circuit malfunction in the driver monitor camera is detected	Harness or connector Driver monitor camera Driver monitor ECU assembly	Driver Monitor Camera Control	A

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (DRIVER MONITOR ECU ASSEMBLY - DRIVER MONITOR CAMERA)

Pre-procedure1

(a) Disconnect the K93 driver monitor ECU assembly connector.

(b) Disconnect the K92 driver monitor camera connector.

Procedure1

Standard Resistance:

Click Location & Routing(K93,K92) Click Connector(K93) Click Connector(K92)

Tester Connection	Condition	Specified Condition	Result
K93-4 (LP) - K92-1 (LP)	Always	Below 1 Ω	Ω
K93-3 (LS) - K92-2 (LS)	Always	Below 1 Ω	Ω
K93-4 (LP) - K92-2 (LS)	Always	10 kΩ or higher	kΩ
K93-4 (LP) - Body ground	Always	10 kΩ or higher	kΩ
K93-3 (LS) - Body ground	Always	10 kΩ or higher	kΩ

Post-procedure1

(d) None

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	REPLACE DRIVER MONITOR CAMERA

HINT:

Click here

CLEAR DTC

(a) Clear the DTCs.

Chassis > Driver Monitor Camera Control > Clear DTCs

4.	CHECK FOR DTC

(a) Check for DTCs.

Chassis > Driver Monitor Camera Control > Trouble Codes

Result	Proceed to
DTCs are not output	A
C1A3471 is output	B

END (DRIVER MONITOR CAMERA IS DEFECTIVE)

REPLACE DRIVER MONITOR ECU ASSEMBLY

Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U029387)

DESCRIPTION

These DTCs are output if a malfunction occurs in the CAN communication system connected to the driver monitor ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
U010087	Lost Communication with ECM/PCM "A" Missing Message	When a communication error between the driver monitor ECU assembly and the ECM is detected	CAN communication system	Driver Monitor Camera Control	B
U010187	Lost Communication with TCM Missing Message	When a communication error between the driver monitor ECU assembly and the hybrid Toyota Prius vehicle control ECU is detected	CAN communication system	Driver Monitor Camera Control	B
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	When a communication error between the driver monitor ECU assembly and the steering sensor is detected	CAN communication system	Driver Monitor Camera Control	B
U012987	Lost Communication with Brake System Control Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the No. 2 skid control ECU (brake actuator assembly) is detected	CAN communication system	Driver Monitor Camera Control	B
U013187	Lost Communication with Power Steering Control Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the power steering ECU (rack and pinion power steering gear assembly) is detected	CAN communication system	Driver Monitor Camera Control	B
U014087	Lost Communication with Body Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the main body ECU (multiplex network body ECU) is detected	CAN communication system	Driver Monitor Camera Control	B
U015187	Lost Communication with Restraints Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the airbag ECU assembly is detected	CAN communication system	Driver Monitor Camera Control	B
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the combination meter assembly is detected	CAN communication system	Driver Monitor Camera Control	B
U023A87	Lost Communication with Image Processing Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the forward recognition camera is detected	CAN communication system	Driver Monitor Camera Control	B
U029387	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the hybrid Toyota Prius vehicle control ECU is detected	CAN communication system	Driver Monitor Camera Control	B

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Chassis > Driver Monitor Camera Control > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Chassis > Driver Monitor Camera Control > Trouble Codes

Result	Proceed to
U010087, U010187, U012687, U012987, U013187, U014087, U015187, U015587, U023A87 or U029387 is output	A
DTCs are not output	B

GO TO CAN COMMUNICATION SYSTEM

for HEV Model: Click here

for PHEV Model: Click here

USE SIMULATION METHOD TO CHECK

Software Incompatibility with Body Control Module Not Programmed (U032251,U032257)

DESCRIPTION

The driver monitor ECU assembly receives vehicle information from the main body ECU (multiplex network body ECU) via CAN communication.

DTC U032251 is stored when the driver monitor ECU assembly cannot confirm the vehicle information from the main body ECU (multiplex network body ECU). The driver monitor ECU assembly receives Toyota Prius vehicle information from the main body ECU (multiplex network body ECU) via CAN communication.

DTC U032257 is stored when the vehicle information from the main body ECU (multiplex network body ECU) and that stored in the driver monitor ECU assembly do not match.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
U032251	Software Incompatibility with Body Control Module Not Programmed	The driver monitor ECU assembly cannot confirm the Toyota Prius vehicle information from the main body ECU (multiplex network body ECU).	Main body ECU (Multiplex network body ECU) Driver monitor ECU assembly	Driver Monitor Camera Control	A
U032257	Software Incompatibility with Body Control Module Invalid/Incompatible Software Component	The Toyota Prius vehicle information from the main body ECU (multiplex network body ECU) and that stored in the driver monitor ECU assembly do not match.	Main body ECU (Multiplex network body ECU) Driver monitor ECU assembly	Driver Monitor Camera Control	A

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.	CHECK FOR DTCs (HEALTH CHECK)

(a) Using the GTS, perform a health check.

OK:

DTCs are not output by any system other than the driver monitor camera system (Driver Monitor Camera Control).

Result	Proceed to
U032251 and U032257 are not output by a system other than the driver monitor system	A
U032251 or U032257 is output by a system other than the driver monitor system	B