Test F: The Subwoofer is Inoperative/Does Not Operate Correctly

PINPOINT TEST F: THE SUBWOOFER IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

F1-F3:

F3-F5:

F6-F8:

F8-F10:

F10-F12:

F13-F14:

Normal Operation
The subwoofer speaker is powered by a separate subwoofer amplifier. On the Freestyle, the subwoofer speaker is integral to the subwoofer amplifier. On all other vehicles, there are 2 subwoofer speakers connected to the subwoofer amplifier through circuits 824 (WH/VT), 825 (TN/LG), 826 (DB/OG), and 827 (TN/WH). The subwoofer receives audio signals from the audio unit through circuits 176 (PK/LG) and 179 (OG/RD). The subwoofer amplifier receives voltage (at all times) through circuit 1678 (WH/VT), and ground through circuit 1204 (BK/OG).

The enable/clip circuit 174 (GY/BK) carries out 2 functions: to turn on the subwoofer amplifier, and to 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 amplifier (heard as distortion).

Possible Causes
- Fuse
- Circuit 174 (GY/BK) open or short to ground
- Circuit 176 (PK/LG) open, short to ground or voltage
- Circuit 179 (OG/RD) open, short to ground or voltage
- Circuit 824 (WH/VT) open, short to ground or voltage
- Circuit 825 (TN/LG) open, short to ground or voltage
- Circuit 826 (DB/OG) open, short to ground or voltage
- Circuit 827 (TN/WH) open, short to ground or voltage
- Circuit 1204 (BK/OG) open
- Circuit 1678 (WH/VT) open
- Subwoofer amplifier
- Subwoofer speaker
- Audio unit