Test A
PINPOINT TEST A: NO COMMUNICATION WITH THE AUDIO UNITTest A1:
Test A2:
Normal Operation
When the key is in the RUN position and the audio unit is turned on, communication should be possible between the diagnostic tool and the audio unit. The tool should successfully retrieve codes and data.
Possible Causes
- circuit 4-EG10(GY/BK) open or short to ground
- circuit 5-EG10 (BU/YE) open or short to ground
- circuit 29-MD15 (OG/BK) open or short to ground
- circuit 91-MD15 (BN/GN) open
- circuit 75-MD15 (YE/GN) open or short to ground
- audio unit