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

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

Normal Operation
The audio unit sends audio signals to the subwoofer amplifier through circuits VME22 (VT/GN) and RME22 (GN/WH). The enable/clip circuit SME23 (VT/RD) serves 2 functions: to enable the subwoofer amplifier, and to detect an overload condition. When an overload condition is present, the audio unit clips the signal to the subwoofer amplifier (heard as distortion). The subwoofer amplifier receives voltage through circuit SBP12 (GN/RD), and ground through circuit GD103 (BK/BU).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Subwoofer speaker
- Subwoofer amplifier
- Audio unit

D1-D4:

D4-D6:

D6-D9:

D9-D10: