Pinpoint Test 4: The Subwoofer Is Inoperative/Does Not Operate Correctly

PINPOINT TEST 4: THE SUBWOOFER IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

Normal Operation

The audio unit sends audio signals to the subwoofer amplifier through circuits (V/G) and (G/W). The enable/clip circuit (V/R) 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 (G/R). and ground through circuit (B/L).

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

CAUTION:For the CD6 audio unit, the audio unit must be placed in shipment mode before removal. See Programming and Relearning. Failure to follow this instruction may result in damage to the audio unit.

CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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