Audio System Symptom Troubleshooting - Rearview camera image does not come on
Rearview camera image does not come on
NOTE:
Check the vehicle 12 volt battery condition first.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Make sure the vehicle's parking brake is applied.

?2.
Turn the vehicle to the ON mode.

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

Does the audio display image change when the transmission is shifted to R position/mode?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
DTC check:

DTC check
?1.
Shift the transmission to P or N (Neutral) position/mode.

?2.
Check for hard error codes.

Are there any audio DTCs indicated?

     
YES
     
     
     
Go to indicated DTC's troubleshooting.?
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (BACK LT line, others):

Determine possible failure area (BACK LT line, others)
?1.
Go into the System Diagnostic Mode, and use the Car Status to check the BACK signal.

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

Does the BACK signal change from [0] to [1] when the transmission is shifted from P or N (Neutral) position/mode to R position/mode?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Go to step 4.
4.
Open wire check (BACK LT line):

Open wire check (BACK LT line)
?1.
Shift the transmission to P or N (Neutral) position/mode.

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

?3.
Disconnect the following connector.
Audio unit connector B (32P)

?4.
Turn the vehicle to the ON mode.

?5.
Shift the transmission to R position/mode.

?6.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Audio unit connector B (32P): disconnected
Test point 1
Audio unit connector B (32P) No. 15
Test point 2
Body ground

Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire.?
5.
Shorted wire check (CAMERA V GND, CAMERA V, RC VCC lines):

Shorted wire check (CAMERA V GND, CAMERA V, RC VCC lines)
?1.
Shift the transmission to P or N (Neutral) position/mode.

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

?3.
Disconnect the following connectors.
Audio unit connector B (32P)
Rearview camera 8P connector

?4.
Check for continuity between the following test points and body ground individually.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector B (32P): disconnected
 
Rearview camera 8P connector: disconnected

Connector
Test circuit
Audio unit connector B (32P)
No. 13
No. 14
No. 29

Is there continuity?

     
YES
     
     
     
There is a short to body ground in the wire(s). Replace the affected shielded harness.?
     
NO
     
     
     
The CAMERA V GND, CAMERA V, and RC VCC wires are not shorted to ground. Go to step 6.
6.
Shorted wire check (Shielded CAMERA lines, RC lines):

Shorted wire check (Shielded CAMERA lines, RC lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector B (32P): disconnected
 
Rearview camera 8P connector: disconnected

Test point 1:
Audio unit connector B (32P)
Test point 2:
Audio unit connector B (32P)
No. 13
No. 14, No. 28, No. 29, No. 30
No. 14
No. 28, No. 29
No. 28
No. 29

Is there continuity between any of the terminals?

     
YES
     
     
     
There is a short in the wires. Replace the affected shielded harness.?
     
NO
     
     
     
The shielded CAMERA wires and the shielded RC wires are not shorted in the wires. Go to step 7.
7.
Open wire check (CAMERA V GND, CAMERA V, RC VCC lines):

Open wire check (CAMERA V GND, CAMERA V, RC VCC lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector B (32P): disconnected
 
Rearview camera 8P connector: disconnected

Test point 1:
Audio unit connector B (32P)
Test point 2:
Rearview camera 8P connector
No. 13
No. 3
No. 14
No. 5
No. 29
No. 6

Is there continuity?

     
YES
     
     
     
The CAMERA V GND, CAMERA V, and RC VCC wires are OK. Go to step 8.
     
NO
     
     
     
There is an open in the wire(s). Replace the affected shielded harness.?
8.
Voltage check (RC VCC line):

Voltage check (RC VCC line)
?1.
Reconnect audio unit connector B (32P).

?2.
Reconnect the rearview camera 8P connector.

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Test point 1
Audio unit connector B (32P) No. 13
Test point 2
Body ground

Is there about 8.0 V?

     
YES
     
     
     
Go to step 9.
     
NO
     
     
     
9.
Rearview camera check:

Rearview camera check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Substitute a known-good rearview camera, and recheck.

Does the symptom go away?

     
YES
     
     
     
Replace the original rearview camera.?
     
NO