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Symptom: *ALL GAUGES INOPERATIVE POSSIBLE CAUSES NO RESPONSE - PCI BUS PCI BUS - POWERTRAIN CONTROL MODULE PCI BUS - INSTRUMENT CLUSTER FUSED IGNITION SWITCH OUTPUT CIRCUIT (UNLOCK/RUN) SHORT TO GROUND INSTRUMENT CLUSTER GROUND CIRCUIT OPEN FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT SHORT TO GROUND FUSED IGNITION SWITCH OUTPUT (UNLOCK/RUN) CIRCUIT OPEN INSTRUMENT CLUSTER TEST ACTION APPLICABILITY 1 NOTE: Diagnose and repair any MIC, PCM (ECM if diesel equipped), or t, select System Monitors, then J1850 Module Scan. Does the DRBIII t display MIC PRESENT on the BUS? All Yes → Go To 2 No → Refer to the COMMUNICATION category and perform the appro- priate symptom. 2 Turn the ignition on. t, select Body, MIC, SYSTEM TESTS, PCM Monitor. Does the DRBIII t display PCM INACTIVE on the BUS? All Yes → Refer to the COMMUNICATION category and perform the ap- propriate symptom. No → Go To 3 3 Turn the ignition on. t, select Body, MIC, MODULE DISPLAY. Does the DRBIII t display NO RESPONSE from MIC? All Yes → Refer to the COMMUNICATION category and perform the ap- propriate symptom. No → Go To 4 441 INSTRUMENT CLUSTER |