Audio System Symptom Troubleshooting - Rearview camera image does not come on or work properly(Without Navigation, With Display Audio)

NOTE: 

• Check the vehicle 12 volt battery condition first .
• 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.

  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:

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

  - 2. Check for hard error codes - Refer to: How to Troubleshoot the Audio SystemAudio System Self-Diagnostic Function .

  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):

  - 1. Go into the System Diagnostic Mode, and use the Vehicle Status to check the BACK signal - Refer to: Audio System Sound Quality DiagnosisAudio System Diagnostic Mode .

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

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

  YES 

  Go to step 5.

  NO 

  Go to step 4.

• 4. Open wire check (BACK LT line):

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

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

  - 3. Disconnect the following connector.

  Audio unit connector G (24P)

  - 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 G (24P): disconnected
  Test point 1	Audio unit connector G (24P) No. 7 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .

  NO 

  Repair an open in the wire between the audio unit and the under-dash fuse/relay box.

• 5. Shorted wire check (CAMERA lines, RC lines) 1:

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

  - 2. Disconnect the following connectors.

  Audio unit connector G (24P)

  Rearview camera 12P connector

  - 3. Check for continuity between the following test points and body ground individually.

  Test condition	Vehicle OFF (LOCK) mode
  	Audio unit connector G (24P): disconnected
  	Rearview camera 12P connector: disconnected

  Connector	Terminal
  Audio unit connector G (24P) - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)	No. 3
  	No. 4
  	No. 15
  	No. 16

  Is there continuity?

  YES 

  There is a short to body ground in the wire(s) between the audio unit and the rearview camera. Replace the affected shielded harness.

  NO 

  The CAMERA and the RC wires are not shorted to ground. Go to step 6.

• 6. Shorted wire check (CAMERA lines, RC lines) 2:

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

  Test condition	Vehicle OFF (LOCK) mode
  	Audio unit connector G (24P): disconnected
  	Rearview camera 12P connector: disconnected

  Test point 1:Audio unit connector G (24P) - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)	Test point 2:Audio unit connector G (24P) - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
  No. 2	No. 3, No. 4, No. 15, No. 16
  No. 3	No. 4, No. 15, No. 16
  No. 4	No. 15, No. 16
  No. 15	No. 16

  Is there continuity between any of the terminals?

  YES 

  There is a short in the wires between the audio unit and the rearview camera. Replace the affected shielded harness.

  NO 

  The CAMERA and the RC wires are not shorted in the wires. Go to step 7.

• 7. Open wire check (CAMERA lines, RC VCC lines):

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

  Test condition	Vehicle OFF (LOCK) mode
  	Audio unit connector G (24P): disconnected
  	Rearview camera 12P connector: disconnected

  Test point 1:Audio unit connector G (24P) - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)	Test point 2:Rearview camera 12P connector
  No. 3	No. 7
  No. 4	No. 6
  No. 15	No. 9
  No. 16	No. 4

  Is there continuity?

  YES 

  The CAMERA and the RC wires are OK. Go to step 8.

  NO 

  There is an open in the wire(s) between the audio unit and the rearview camera. Replace the affected shielded harness.

• 8. Voltage check (CAMERA VCC line):

  - 1. Reconnect audio unit connector G (24P).

  - 2. Reconnect the rearview camera 12P 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 G (24P) No. 16 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
  Test point 2	Body ground

  Is there about 8.0 V?

  YES 

  Go to step 9.

  NO 

  Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .

• 9. Rearview camera check (substitution):

  - 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 

  Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .