Test A

PINPOINT TEST A: NO COMMUNICATION WITH THE AUDIO UNIT - CDX6 AND DM100i ONLY

Test A1:

Test A1-A2:

Test A3:

Test A4:

Normal Operation
When the key is in the ON position and the audio unit is turned on, communication is possible between the diagnostic tool and the audio unit. The diagnostic tool retrieves codes and data.

Possible Causes
- central junction box (CJB) fuse(s):
- 18 (20A)
- 27 (10)
- battery junction box (BJB) fuse(s):
- 22 (20A)
- 25 (40A)
- standard corporate protocol (SCP) communication network
- circuit 4-EG7 (GY/RD) open or short to ground
- circuit 5-EG7 (BU/RD) open or short to ground
- 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 31-MD15A (BK/GN) open
- circuit 31-MD15B (BK/GN) open
- 75-MD15 (YE/GN) open
- audio unit