Test C: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers)

PINPOINT TEST C: POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS)

Normal Operation
The audio control module (ACM) directs audio signals to the speakers in the form of a fluctuating AC voltage.

- DTC B2965 (Audio System Speaker Circuit Fault) - sets when an open, a short to ground, or a short to voltage is detected on the front or rear speaker circuits. The ACM checks for faults once every 500ms during normal operation, or for any duration during the ACM self-test. On vehicles equipped with Audiophile, the front speakers are not checked for opens.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Speaker
- ACM

C1-C2:

C3-C4:

C4-C5: