Test D: The Subwoofer Is Inoperative/Does Not Operate Correctly

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

D1:

D2-D5:

D5-D7:

D7-D9:

D9-D10:

Normal Operation
The subwoofer speaker is powered by a separate subwoofer amplifier. The enable/clip circuit SME23 (VT/RD) carries out 2 functions: to turn the subwoofer amplifier on, 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). The subwoofer amplifier receives voltage through circuit SBB22 (BN/RD), and ground through circuit GD114 (BK/BU).

DTC B2913 - sets when the audio unit does not detect the subwoofer through circuit SME23 (VT/RD) during the subwoofer connection test (part of the audio unit self-test).

Possible Causes
- Fuse
- Circuit GD114 (BK/BU) open
- Circuit RME22 (GN/WH) open, short to ground or voltage
- Circuit SBB22 (BN/RD) open
- Circuit SME23 (VT/RD) open, short to ground or voltage
- Circuit VME22 (VT/GN) open, short to ground or voltage
- Subwoofer
- Audio unit