Audio System Symptom Troubleshooting - Audio unit does not exit anti-theft mode
Audio unit does not exit anti-theft mode
NOTE:
Check the vehicle 12 volt battery condition first.
Check for F-CAN and 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 vehicle to the ON mode.

?2.
Press and hold the POWER button to release the anti-theft mode.

Is the anti-theft mode released?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (B-CAN_H, B-CAN_L):

Determine possible failure area (B-CAN_H, B-CAN_L)
?1.
Measure the voltage between test point 1 and 2.
Test condition
Vehicle ON mode
Test point 1
Audio unit connector B (20P) No. 3
Test point 2
Body ground

Test point 1
Audio unit connector B (20P) No. 13
Test point 2
Body ground

Is there about 2.5 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
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 vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Audio unit connector B (20P)
Gauge control module connector A (32P)

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector B (20P): disconnected
 
Gauge control module connector A (32P): disconnected
Test point 1
Audio unit connector B (20P) No. 3
Test point 2
Gauge control module connector A (32P) No. 31

Test point 1
Audio unit connector B (20P) No. 13
Test point 2
Gauge control module connector A (32P) No. 30


Is there continuity?

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