Test D

PINPOINT TEST D: POOR QUALITY/DISTORTED SOUND OR NO SOUND FROM ALL SPEAKERS

Test D1-D2:

Normal Operation
The audio unit directs the audio signals to the speakers through separate positive and negative circuits for each of the four audio channels: LF, RF, LR, and RR. The audio unit provides internal circuit protection for shorts to ground, shorts to B+ battery or shorts between any output circuits.

Possible Cause
- audio unit