Test F: The Auxiliary Audio Control Is Inoperative/Does Not Operate Correctly - Rear Auxiliary Audio Controls

PINPOINT TEST F: THE AUXILIARY AUDIO CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - REAR AUXILIARY AUDIO CONTROLS

F1-F3:

F3-F5:

F5-F7:

F7 Continued:

Normal Operation
The rear audio/climate control module receives voltage through circuit 1499 (PK/LG) and ground through circuit 676 (PK/OG). The rear audio/climate control module receives input from the rear auxiliary audio controls through circuit 595 (LB/RD). It then sends these signals to the audio unit over the audio corporate protocol (ACP) network through circuits 832 (LB/PK) and 833 (TN).

DTC B113A - sets when a rear auxiliary audio control switch is detected active for greater than 120 seconds during normal operation, or for greater than 2 seconds during the self-test.

DTC B113B - sets when a short to ground is detected on the circuitry between the rear audio/climate control module and the rear auxiliary audio switch.

DTC B113C - sets when a short to voltage is detected on the circuitry between the rear audio/climate control module and the rear auxiliary audio switch.

DTC U2005 - sets when communication is lost between the navigation audio unit and the rear audio/climate control module.

Possible Causes
- Circuit 595 (LB/RD) open, short to ground or voltage
- Circuit 676 (PK/OG) open
- Circuit 832 (LB/PK) open, short to ground or voltage
- Circuit 833 (TN) open, short to ground or voltage
- Rear auxiliary audio controls
- Rear audio/climate control module
- Audio unit