Test C: The Subwoofer Is Inoperative/Does Not Operate Correctly - Front Subwoofer

PINPOINT TEST C: THE SUBWOOFER IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - FRONT SUBWOOFER

C1-C3:

C3-C6:

C6-C8:

C8-C10:

C10-C12:

C12-C13:

Normal Operation
The front subwoofers are powered by a separate subwoofer amplifier for each subwoofer speaker. The enable/clip circuit 173 (DG/VT) carries out 2 functions: to turn on the subwoofer amplifiers, and monitor an overload condition to the subwoofer amplifier. In the event of an overload, the audio unit clips the audio output signal to the subwoofer amplifiers (heard as distortion). The front subwoofer amplifiers receive voltage through circuit 829 (WH/VT), and ground through circuit 1204 (BK/OG).

Possible Causes
- Fuse
- Circuit 167 (BN/OG) open, short to ground or voltage
- Circuit 168 (RD/BK) open, short to ground or voltage
- Circuit 173 (DG/VT) open or short to ground
- Circuit 804 (OG/LG) open, short to ground or voltage
- Circuit 805 (WH/LG) open, short to ground or voltage
- Circuit 811 (DG/OG) open, short to ground or voltage
- Circuit 813 (LB/WH) open, short to ground or voltage
- Circuit 815 (LG/OG) open, short to ground or voltage
- Circuit 816 (LG/VT) open, short to ground or voltage
- Circuit 819 (LG/WH) open, short to ground or voltage
- Circuit 820 (DB/YE) open, short to ground or voltage
- Circuit 829 (WH/VT) open
- Circuit 1204 (BK/OG) open
- Subwoofer amplifier
- Subwoofer
- Audio unit