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

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

Normal Operation
The subwoofer amplifier receives voltage through circuit 720 (RD/YE) and ground through circuit 694 (BK/LG). Audio signals are sent to the subwoofer amplifier from the audio unit through circuits 167 (BN/OG) and 168 (RD/BK). The enable/clip circuit 173 (DG/VT) 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).

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

E1-E3:

E3-E5:

E5-E7:

E7-E8: