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Symptom: LOOPBACK FAILURE POSSIBLE CAUSES INSTRUMENT CLUSTER TEST ACTION APPLICABILITY 1 Turn the ignition on. t, record and erase DTC’s. Turn the ignition off, wait 15 seconds, then turn the ignition on. t, read DTCs. Did the DTC reset? All Yes → Replace the Instrument Cluster in accordance with the Service Information. No → Test Complete. 643 INSTRUMENT CLUSTER |