Navigation System Symptom Troubleshooting - Rearview camera image does not change when selecting different views

NOTE: 

• Check the vehicle 12 volt battery condition first .
• 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 troubleshooting - Refer to: Navigation System Symptom Troubleshooting - Vehicle position icon wanders across the map when driving (does not follow a displayed road) or map vehicle ICON spins,  or Navigation System Symptom Troubleshooting - Voice control does not work/respond,  or Navigation System Symptom Troubleshooting - Audio-navigation unit will not turn on (No information display and no sound),  or Navigation System Symptom Troubleshooting - Rearview camera image does not change when selecting different views,  or Navigation System Symptom Troubleshooting - Audio-navigation unit button illumination does not work,  or Navigation System Symptom Troubleshooting - Rearview camera image does not come on .
• Check the connectors for poor connections or loose terminals.

1. Problem verification:

   - 1. Turn the vehicle to the ON mode.

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

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

   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.

2. Shorted wire check (CAMERA BIT0 line, CAMERA BIT1 line):

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

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

   - 3. Disconnect the following connectors.

   Audio-navigation unit connector C (24P)

   Rearview camera 8P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector C (24P): disconnected
   	Rearview camera 8P connector: disconnected
   Test point 1	Audio-navigation unit connector C (24P) No. 5
   Test point 2	Body ground

   Test point 1	Audio-navigation unit connector C (24P) No. 18
   Test point 2	Body ground

   Is there continuity?

   YES 

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

   NO 

   The CAMERA BIT0 and the CAMERA BIT1 wires are not shorted to ground. Go to step 3.

3. Shorted wire check (CAMERA BIT0 line to CAMERA BIT1 line):

   Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector C (24P): disconnected
   	Rearview camera 8P connector: disconnected
   Test point 1	Audio-navigation unit connector C (24P) No. 5
   Test point 2	Audio-navigation unit connector C (24P) No. 18

   Is there continuity?

   YES 

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

   NO 

   The CAMERA BIT0 and the CAMERA BIT1 wires are not shorted. Go to step 4.

4. Open wire check (CAMERA BIT0 line, CAMERA BIT1 line):

   Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector C (24P): disconnected
   	Rearview camera 8P connector: disconnected
   Test point 1	Audio-navigation unit connector C (24P) No. 5
   Test point 2	Rearview camera 8P connector No. 2

   Test point 1	Audio-navigation unit connector C (24P) No. 18
   Test point 2	Rearview camera 8P connector No. 1

   Is there continuity?

   YES 

   The CAMERA BIT0 and the CAMERA BIT1 wires are OK. Go to step 5.

   NO 

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

5. Voltage check (CAMERA BIT0 line):

   - 1. Reconnect audio-navigation unit connector C (24P).

   - 2. Reconnect the rearview camera 8P connector.

   - 3. Turn the vehicle to the ON mode.

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

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

   Test condition	Vehicle ON mode
   Test point 1	Audio-navigation unit connector C (24P) No. 5
   Test point 2	Body ground

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

   Is the voltage OK?

   YES 

   Go to step 6.

   NO 

   Replace the audio-navigation unit .

6. Voltage check (CAMERA BIT1 line):

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

   Test condition	Vehicle ON mode
   Test point 1	Audio-navigation unit connector C (24P) No. 18
   Test point 2	Body ground

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

   Is the voltage OK?

   YES 

   Replace the rearview camera .

   NO 

   Replace the audio-navigation unit .