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 4-EG8 (GY/VT) and 5-EG8 (BU/WH). For additional information on module communication, Refer to MODULE COMMUNICATIONS NETWORK . With the key in the START/RUN position, the instrument cluster receives power from the central junction box (CJB) fuse(s) 4 (5A), circuit 15-GG14 (GN/RD) and 17 (5A), circuit 15-JA14 (GN/BK), while in the RUN/ACC position, power is received from the CJB fuse 13 (5A), circuit 75-GG15 (YE/GN). With the key in the OFF position, the instrument cluster receives its keep-alive power from CJB fuse 20 (10A), circuit 29-GG11 (OG/BU). The instrument cluster grounding is accomplished through circuit 91-GG11 (BN/RD).