Test A: No Communication With The Instrument Cluster

PINPOINT TEST A: NO COMMUNICATION WITH THE INSTRUMENT CLUSTER

Test A1-A2:

Test A2 Continued:

Normal Operation
The instrument cluster communicates interactively with other electronic modules using the communication networks. With the ignition switch in the START/RUN position, the instrument cluster receives power from central junction box (CJB) fuse 28 (5A), circuit 640 (RD/YE) and CJB fuse 27 (5A), circuit 1003 (GY/YE). When in the RUN/ACC position, power is received from CJB fuse 1 (10A), circuit 489 (PK/BK). With the ignition switch in the OFF position, the instrument cluster receives its keep-alive power from CJB fuse 21 (15A), circuit 3049 (BK/LG). The instrument cluster grounding is accomplished through circuit 875 (BK/LB) and the bulb grounding is accomplished through circuit 57 (BK).

Possible Causes
- circuit 57 (BK) open
- circuit 489 (PK/BK) open
- circuit 640 (RD/YE) open
- circuit 875 (BK/LB) open
- circuit 1003 (GY/YE) open
- circuit 3049 (BK/LG) open
- instrument cluster