Test F

PINPOINT TEST F: POOR QUALITY/DISTORTED SOUND OR NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - VEHICLE NAVIGATION RADIO (VNR)

Test F1:

Test F2-F3:

Test F4-F5:

Test F6-F7:

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

Possible Causes
- speaker(s)
- audio unit
- audio amplifier
- speaker circuit(s) open or short to ground