Test G

PINPOINT TEST G: NO COMMUNICATION WITH THE INSTRUMENT CLUSTER

Test G1:

Test G1-G2:

Normal Operation
The instrument cluster communicates interactively with other electronic modules using the standard corporate protocol (SCP) communication network. Communication is accomplished through the use of an unshielded, twisted pair cable data bus line, circuits 914 (TN/OG) and 915 (PK/LB). With the key in the START/RUN position, the instrument cluster receives power from the SJB fuse 19 (5A) on circuit 1112 (WH/LB), and fuse 16 (5A) circuit 640 (RD/YE). The B+ keep alive memory (KAM) power is through the SJB fuse 8 (10A) on circuit 1001 (WH/YE). The instrument cluster grounding is accomplished through circuits 1203 (BK/LB) and 1205 (BK).

Possible Causes
- circuit 640 (RD/YE) open or short to ground
- circuit 914 (TN/OG) open, short to power or ground
- circuit 915 (PK/LB) open, short to power or 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