Test C: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - THX(R) Audio System

PINPOINT TEST C: POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - THX(R) AUDIO SYSTEM

Normal Operation
The audio control module (ACM) directs the audio signals to the audio digital signal processing (DSP) module, which processes the audio signals and sends them to the speakers. Each speaker has a signal and return circuit.







The following should also be noted:
- The ACM does not set DTC B2965 when the vehicle is equipped with the THX(R) audio system. Only the DSP module can set this DTC.
- This DTC may not set due to a fault in the circuitry to the rear tweeters.
- An open or short to ground in the rear tweeter circuitry may cause both rear tweeters to lose sound.

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

C1:

C1-C2:

C2-C3:

C3 Continued:

C4-C5: