Test A: No Communication With The Navigation Module
PINPOINT TEST A: NO COMMUNICATION WITH THE NAVIGATION MODULEA1-A2:
A2 Continued:
Normal Operation
The navigation module receives battery voltage from the central junction box (CJB) through circuits 194 (PK), and 720 (RD/YE), and is grounded through circuit 694 (BK/LG). The navigation module communicates with the diagnostic tool and with other vehicle modules through the standard corporate protocol (SCP) network circuits.
Possible Causes
- fuse(s)
- circuit 194 (PK) open
- circuit 694 (BK/LG) open
- circuit 720 (RD/YE) open
- navigation module