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 A/C 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.

Problem verification:

Problem verification

?1.	Clear the hard error codes.

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

?3.	Wait for at least 6 seconds.

?4.	Check for hard error codes.

Is DTC 2703 indicated?

The failure is duplicated, go to step 2.

Intermittent failure, the system is OK at this time.?

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 A (24P)

Climate control unit connector A (32P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector A (24P): disconnected
	Climate control unit connector A (32P): disconnected
Test point 1	Audio unit connector A (24P) No. 14
Test point 2	Climate control unit connector A (32P) No. 25

Test point 1	Audio unit connector A (24P) No. 24
Test point 2	Climate control unit connector A (32P) No. 8

Is there continuity?

Repair an open in the wire(s) between the audio unit and the climate control unit.?