Toyota Prius: Digital Rear-view Mirror System

Toyota Prius (XW60) 2023-2025 Service Manual / Vehicle Interior / Mirror (int) / Digital Rear-view Mirror System

Parts Location
System Diagram
How To Proceed With Troubleshooting
Operation Check
Problem Symptoms Table
Fail-safe Chart
The Camera Indicator is not Displayed
The Camera Malfunction Indicator Displays and the Screen is Darkened

Parts Location

PARTS LOCATION

ILLUSTRATION

INNER REAR VIEW MIRROR ASSEMBLY

INNER MIRROR CAMERA ASSEMBLY

POWER DISTRIBUTION BOX ASSEMBLY

- ECU-IGR NO.3 FUSE

- ECU-B NO.2 FUSE

System Diagram

SYSTEM DIAGRAM

How To Proceed With Troubleshooting

PROCEDURE

1.	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

3.	INSPECT AUXILIARY BATTERY VOLTAGE

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

Standard Voltage:

11 to 14 V

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

4.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

5.	REPAIR OR REPLACE

END

Operation Check

OPERATION CHECK

HINT:

It is only necessary to perform an inspection when there are dents or distortion in the back door panel sub-assembly as a result of an accident.
Inspections are not required when replacing parts or removing and reinstalling.

Camera image range confirmation procedure

(a) Set the Toyota Prius vehicle in the position shown in the illustration and create a target on the wall.

NOTICE:

Perform on a level surface.
Remove all luggage from the vehicle before starting work.
Adjust the tire pressures to the specified pressure before starting work.

*1	Toyota Prius Vehicle Center	*2	Wall, etc.
*3	Target	*4	Toyota Prius Vehicle Rear End
*5	100 cm (3.28 ft.)	*6	90.3 cm (2.96 ft.)
*7	49.5 cm (1.62 ft.)	*8	2.3 cm (0.08 ft.)

*1	Inner Rear View Mirror Assembly
*a	Target
*b	Switch Lever

(b) With the ignition switch to ON, operate the switch lever and turn the display on (digital mirror mode) and check that the target is recognized on the inner rear view mirror assembly.

HINT:

Set the display settings to the initial settings (position, zoom [enlargement/reduction]).
If the target is properly displayed, there is no problem with the positioning and the digital inner mirror system is normal.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

Digital Rear-view Mirror System

Symptom	Suspected Area	Link
The camera malfunction indicator displays and the screen is darkened	Inner mirror camera assembly
	Inner rear view mirror assembly
	Harness or connector
The camera indicator is not displayed	Harness or connector
The camera indicator is not displayed	Inner rear view mirror assembly
The display does not operate normally	Inner rear view mirror assembly
Switch lever cannot be operated	Inner rear view mirror assembly
The automatic anti-glare function cannot be switched ON or OFF	Inner rear view mirror assembly

Fail-safe Chart

FAIL-SAFE CHART

Protection control

(a) Inner rear view mirror assembly high internal temperature

(1) When the temperature inside the inner rear view mirror assembly reaches a temperature higher than the higher limit for operation, the mirror high temperature indicator is displayed on the inner rear view mirror assembly and changes to protection mode.

HINT:

When the temperature limit for use is exceeded, the display gradually becomes darker, and if the temperature continues to rise, the display turns off.

The Camera Indicator is not Displayed

DESCRIPTION

Power is supplied to the inner rear view mirror assembly through this circuit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (INNER REAR VIEW MIRROR ASSEMBLY - BODY GROUND)

(a) Disconnect the inner rear view mirror assembly connector.

*a	Front view of wire harness connector (to Inner Rear View Mirror Assembly)

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

Standard Voltage:

Click Location & Routing(U12) Click Connector(U12)

Tester Connection	Switch Condition	Specified Condition
U12-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
U12-6 ( B) - Body ground	Ignition switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (INNER REAR VIEW MIRROR ASSEMBLY - BODY GROUND)

(a) Disconnect the inner rear view mirror assembly connector.

*a	Front view of wire harness connector (to Inner Rear View Mirror Assembly)

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

Standard Resistance:

Click Location & Routing(U12) Click Connector(U12)

Tester Connection	Condition	Specified Condition
U12-2 (E) - Body ground	Always	Below 1 Ω

REPLACE INNER REAR VIEW MIRROR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

The Camera Malfunction Indicator Displays and the Screen is Darkened

DESCRIPTION

The image signals sent from the inner mirror camera assembly are input to the inner rear view mirror assembly via the vehicle wire harness and then displayed on the screen.

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (INNER REAR VIEW MIRROR ASSEMBLY - INNER MIRROR CAMERA ASSEMBLY)

(a) Disconnect the U17 inner rear view mirror assembly connector.

(b) Disconnect the V4 inner mirror camera assembly connector.

Standard Resistance:

Click Location & Routing(U17,V4) Click Connector(U17) Click Connector(V4)

Tester Connection	Condition	Specified Condition
U17-3 (LVDS-) - V4-2 (LVDS-)	Always	Below 1 Ω
U17-2 (ECB ) - V4-1 (CEB )	Always	Below 1 Ω
U17-1 (EGND) - V4-3 (CGND)	Always	Below 1 Ω
U17-4 (LVDS ) - V4-4 (LVDS )	Always	Below 1 Ω
U17-5 (SGND) - V4-5 (SGND)	Always	Below 1 Ω
U17-3 (LVDS-) or V4-2 (LVDS-) - Body ground	Always	10 kΩ or higher
U17-2 (ECB ) or V4-1 (CEB ) - Body ground	Always	10 kΩ or higher
U17-1 (EGND) or V4-3 (CGND) - Body ground	Always	10 kΩ or higher
U17-4 (LVDS ) or V4-4 (LVDS )- Body ground	Always	10 kΩ or higher
U17-5 (SGND) or V4-5 (SGND) - Body ground	Always	10 kΩ or higher