Symptom:
*ALL GAUGES INOPERATIVE
POSSIBLE CAUSES
NO RESPONSE - PCI BUS
NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
NO RESPONSE - PCI BUS - INSTRUMENT CLUSTER
FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, select System Monitors, then J1850 Module Scan.
Does the DRBIIIt 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.
With the DRBIIIt, select Body, MIC, SYSTEM TESTS, PCM Monitor.
Does the DRBIIIt display PCM INACTIVE ON THE BUS?
All
Yes → Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE POWERTRAIN CONTROL MODULE.
No → Go To 3
3 Turn the ignition on.
With the DRBIIIt, select Body, MIC, MODULE DISPLAY.
Does the DRBIIIt display NO RESPONSE from MIC?
All
Yes → Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE INSTRUMENT CLUSTER.
No → Go To 4
152
INSTRUMENT CLUSTER
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