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Symptom: *PCI BUS COMMUNICATION FAILURE POSSIBLE CAUSES WITH THE DRB PERFORM A MODULE SCAN OPEN PCI BUS CIRCUIT AT THE DATA LINK CONNECTOR USING THE DRB, PERFORM THE PCI BUS CONTROL MODE DISCONNECT THE MODULE HARNESS CONNECTOR PCI BUS CIRCUIT SHORTED TO VOLTAGE DISCONNECT THE MODULE HARNESS CONNECTOR PCI BUS CIRCUIT SHORTED TO GROUND WIRING HARNESS INTERMITTENT FAILURE TEST ACTION APPLICABILITY 1 Note: Determine which modules this vehicle is equipped with before begin- All Yes → Refer to the Communication category for the related symptom(s). No → 2 Turn the ignition off. All Yes → No → Repair the PCI Bus circuit for an open between the DLC and the 31 COMMUNICATION |