Test B

PINPOINT TEST B: NO COMMUNICATION WITH THE NAVIGATION SYSTEM MODULE

Test B1:

Test B1-B2:

Normal Operation
Battery voltage is supplied to the navigation system module through circuit 1001 (WH/YE). The accessory/delay relay supplies voltage to the navigation system module through circuit 1002 (BK/PK). Circuit 1205 (BK) provides the navigation system module ground.

Possible Causes
- circuit 1001 (WH/YE) open or shorted to ground
- circuit 1002 (BK/PK) open or shorted to ground
- circuit 1205 (BK) open
- navigation system module