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Symptom: BCM MESSAGES NOT RECEIVED When Monitored and Set Condition: BCM MESSAGES NOT RECEIVED When Monitored: With the ignition on. Set Condition: This DTC will set if the NAV Module does not receive PCI bus messages from the BCM for 5 seconds. The code will clear after 50 ignition cycles. POSSIBLE CAUSES DTC INTERMITTENT CONDITION COMM FAULT PRESENT NAVIGATION UNIT TEST ACTION APPLICABILITY 1 With the DRBIII t, erase DTCs. Cycle the ignition switch from on to off and then back to on.. t, read DTCs. Does the DRBIII t display BCM MESSAGES NOT RECEIVED? All No → The condition is not present at this time. Monitor DRBIIIt parameters while wiggling the related wire harness. Refer to any Yes → Go To 2 2 Turn the ignition on. t, attempt to communicate with the BCM. With the DRBIII t, read DTCs. NOTE: If there are any BCM DTC’s present, diagnose and repair them t able to communicate with the BCM? All Yes → Replace the Navigation Unit in accordance with the Service Information. No → Refer to COMMUNICATION for the related symptom(s). Perform BODY VERIFICATION TEST - VER 1. 741 NAVIGATION |