Audio System Symptom Troubleshooting - Audio panel button illumination does not work
Audio panel button illumination does not work
NOTE:
Check the vehicle battery condition first.
Check for B-CAN DTCs and resolve them before troubleshooting.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Turn the combination light switch to the parking light position.

?3.
Check if the audio unit buttons are illuminated.

Are the buttons illuminated?

     
YES
     
     
     
Intermittent failure, the audio unit is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (interior lights circuit, others):

Determine possible failure area (interior lights circuit, others)
?1.
Check if several other buttons that are not related to the audio system are illuminated.

Are the buttons illuminated?

     
YES: Without navigation
     
     
     
Go to step 3.
     
YES: With navigation
     
     
     
Go to step 4.
     
NO
     
     
     
Troubleshoot the interior lights.?
3.
Open wire check (B CAN-H line, B CAN-L line):

Open wire check (B CAN-H line, B CAN-L line)
?1.
Turn the combination light switch off.

?2.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
 
Audio unit connector A (24P): disconnected
 
Gauge control module connector A (32P): disconnected
Test circuit
B CAN-H
Test point 1
Audio unit connector A (24P) No. 4 (PNK)
Test point 2
Gauge control module connector A (32P) No. 30 (PNK)

Test circuit
B CAN-L
Test point 1
Audio unit connector A (24P) No. 2 (BLU)
Test point 2
Gauge control module connector A (32P) No. 31 (BLU)


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the audio unit and the gauge control module.?
4.
Open wire check (B CAN-H line, B CAN-L line):

Open wire check (B CAN-H line, B CAN-L line)
?1.
Turn the combination light switch off.

?2.
Press the engine start/stop button to select the OFF mode.

?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector A (24P): disconnected
 
Gauge control module connector A (32P): disconnected
Test circuit
B CAN-H
Test point 1
Audio-navigation unit connector A (24P) No. 4 (PNK)
Test point 2
Gauge control module connector A (32P) No. 30 (PNK)

Test circuit
B CAN-L
Test point 1
Audio-navigation unit connector A (24P) No. 2 (BLU)
Test point 2
Gauge control module connector A (32P) No. 31 (BLU)


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the audio-navigation unit and the gauge control module.?