Test A: No Communication With The Navigation Module

PINPOINT TEST A: NO COMMUNICATION WITH THE NAVIGATION MODULE

A1-A3:

Normal Operation
Battery voltage is supplied to the navigation module through circuit 30-GK8 (RD/BK). The driver door module (DDM) supplies voltage to the navigation module through circuit 10-GK8 (GY/BK) with the ignition switch in the ON or ACC position. Circuit 31-GK8 (BK/RD) provides the navigation module ground.

Possible Causes
- fuse
- circuit 10-GK8 (GY/BK) open
- circuit 30-GK8 (RD/BK) open
- circuit 31-GK8 (BK/RD) open
- navigation module