Test D

PINPOINT TEST D: POOR QUALITY/DISTORTED SOUND OR NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - EXCEPT NAVIGATION AUDIO UNIT

Test D1-D3:

Test D3-D5:

Test D6-D8:

Test D9-D11:

Test D11-D12:

Test D12 Continued:

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, RR, subwoofer I and subwoofer II. The signals are then amplified by the center imaging amplifier and sent to both of the center imaging speakers. The audio unit provides internal circuit protection for shorts to ground, shorts to B+ battery or shorts between any output circuits.

Possible Causes
- central junction box (CJB) fuse 18 (20A)
- battery junction box (BJB) fuse 25 (40A)
- center imaging amplifier
- speakers
- audio unit
- high resistance or short to ground in speaker circuits