Audio System DTC Troubleshooting: 2703
DTC 2703: Aircon Diag
NOTE:
Check the vehicle 12 volt battery condition first.
This audio DTC sets when Connection NG is indicated in the Aircon diagnosis (the A/C icon is red in the System Links).
Check for B-CAN DTCs and resolve them before troubleshooting.
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Clear the hard error codes.

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

?3.
Check for hard error codes.

Is DTC 2703 indicated?

     
YES
     
     
     
The failure is duplicated, go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
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 C (20P)
Climate control unit 32P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector C (20P): disconnected
 
Climate control unit 32P connector: disconnected
Test point 1
Audio unit connector C (20P) No. 13
Test point 2
Climate control unit 32P connector No. 16


Is there continuity?

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