Instrument Cluster

The electronic instrument cluster contains a microprocessor which controls cluster functions based on data it receives from the CCD bus. Circuit M1 from fuse 16 in the Power Distribution Center (PDC) supplies power to the cluster microprocessor. When the ignition switch is in the START or RUN position, it connects circuit A1 from fuse 2 in the PDC to circuit A21. Circuit A21 powers circuit F87 through fuse 9 in the junction block. Circuit F87 powers the cluster microprocessor plus the warning lamps in the cluster. The cluster microprocessor switches the warning lamps on and off by controlling the ground path for each lamp.