Test A: No Communication With The Instrument Cluster

PINPOINT TEST A: NO COMMUNICATION WITH THE INSTRUMENT CLUSTER

A1-A2:

A2 Continued:

Normal Operation
The instrument cluster communicates interactively with other electronic modules using the standard corporate protocol (SCP) communication network, the controller area network (CAN) and hardwired circuitry.With the ignition switch in the START or RUN position, the instrument cluster receives voltage from the smart junction box (SJB) through circuit 1112 (WH/LB), and circuit 640 (RD/YE). The B+ keep alive memory (KAM) voltage is from the SJB through circuit 1001 (WH/YE). The instrument cluster grounding is accomplished through circuits 1203 (BK/LB) and 1205 (BK).

Possible Causes
- fuse(s)
- circuit 640 (RD/YE) open or short to ground
- circuit 1001 (WH/YE) open or short to ground
- circuit 1112 (WH/LB) open or short to ground
- circuit 1203 (BK/LB) open
- circuit 1205 (BK) open
- instrument cluster