Rearview Camera Image Does Not Change When Selecting Different Views

NOTE:

Check the vehicle 12 volt battery condition first - Refer to:

12 Volt Battery Test (With Auto Idle Stop System) or

12 Volt Battery Test (Without Auto Idle Stop System) .

You can select three different rearview camera angles for backing up. If there is no camera image on the display, go to:
Rearview camera image does not come on or work properly
Check the connectors for poor connections or loose terminals.

Problem verification
-1. Turn the vehicle to the ON mode.

- 2. Shift the transmission to R position/mode.

- 3. Operate the audio unit to see if the rearview image changes between the wide view, the normal view, and the top down view in this order.

Does the rearview camera image change properly?

YES

Intermittent failure, the system is OK at this time.

NO

The failure is duplicated, go to step 2.

Shorted wire check (BIT0, BIT1 lines)

-1. Shift the transmission to P position/mode or N position/mode.

- 2. Turn the vehicle to the OFF (LOCK) mode.

- 3. Disconnect the following connectors.

Audio unit connector C (24P)

Rearview camera 6P connector

- 4. Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector C (24P) disconnected
	Rearview camera 6P connector: disconnected
Test circuit 1
Test point 1	Audio unit connector C (24P) No. 5 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Body ground

Test circuit 2
Test point 1	Audio unit connector C (24P) No. 18 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Body ground

Is there continuity?

YES

Repair a short to body ground in the wire(s) between the audio unit and the rearview camera.

The BIT0 wire and BIT1 wire are not shorted. Go to step 3.

Shorted wire check (BIT0 line to BIT1 line)

-1. Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector C (24P) disconnected
	Rearview camera 6P connector: disconnected
Test point 1	Audio unit connector C (24P) No. 5 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Audio unit connector C (24P) No. 18 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .

Is there continuity?

YES

Repair a short in the wires between the audio unit and the rearview camera.

The BIT0 wire to BIT1 wire are not shorted. Go to step 4.

Open wire check (BIT0, BIT1 lines)

-1. Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector C (24P) disconnected
	Rearview camera 6P connector: disconnected
Test circuit 1
Test point 1	Audio unit connector C (24P) No. 5 - : Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Rearview camera 6P connector No. 5 - Refer to: Rearview Camera Connector For Inputs And Outputs (2016 2017 2018) Rearview Camera Connector For Inputs And Outputs (2019 2020 2021)

Test circuit 2
Test point 1	Audio unit connector C (24P) No. 18 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Rearview camera 6P connector No. 6 - Refer to: Rearview Camera Connector For Inputs And Outputs (2016 2017 2018) Rearview Camera Connector For Inputs And Outputs (2019 2020 2021)

Is there continuity?

YES

The BIT0 wire and BIT1 wire are OK. Go to step 5.

Repair an open in the wire(s) between the audio unit and the rearview camera.

Audio unit check 1 (BIT0 line)

-1. Reconnect the following connectors.

Audio unit connector C (24P)

Rearview camera 6P connector

- 2. Turn the vehicle to the ON mode.

- 3. Shift the transmission to R position/mode.

- 4. Measure the voltage between test points 1 and 2 as specified in the table.

Test condition	Vehicle ON mode
Test point 1	Audio unit connector C (24P) No. 5 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Body ground

Selected view mode	Voltage
Wide View	0 V
Normal View	About 5 - 8 V
Top Down View	0 V

Is the voltage OK?

YES

Go to step 6.

Replace the audio unit - Refer to:

Audio Unit Removal and Installation [Display Audio Type (8-inch Screen)] (2016 2017 2018) or

Audio Unit Removal and Installation [Color Audio Type (5-inch Screen)] .

Audio unit check 2 (BIT1 line)

-1. Measure the voltage between test points 1 and 2 as specified in the table.

Test condition	Vehicle ON mode
Test point 1	Audio unit connector C (24P) No. 18 - Refer to: Audio Unit Connector for Inputs and Outputs [Display Audio Type (8-inch Screen)] (2016 2017 2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2016 2017) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2018) or Audio Unit Connector for Inputs and Outputs [Color Audio Type (5-inch Screen)] (2019 2020 2021) .
Test point 2	Body ground

Selected view mode	Voltage
Wide View	0 V
Normal View	0 V
Top Down View	About 5 - 8 V

Is the voltage OK?

YES

Replace the rearview camera Rearview Camera Removal and Installation .

Replace the audio unit - Refer to:

Audio Unit Removal and Installation [Display Audio Type (8-inch Screen)] (2016 2017 2018) or

Audio Unit Removal and Installation [Color Audio Type (5-inch Screen)] .