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Symptom: NO TCM MESSAGES RECEIVED When Monitored and Set Condition: NO TCM MESSAGES RECEIVED When Monitored: With the ignition on. Set Condition: The PRNDL display or Manual Shift Data message from NGC Transmis- sion is missing. POSSIBLE CAUSES INTERMITTENT CONDITION NO COMMUNICATION WITH TCM PCI BUS CKT OPEN TO PARK ASSIST MODULE PARK ASSIST MODULE TEST ACTION APPLICABILITY 1 With the DRBIII t, Erase DTCs. Cycle the ignition off for at least 1 minute. t under System Tests, perform the Self Test. With the DRBIII t read DTCs. Does this DTC reset? All Yes → Go To 2 No → Go To 5 2 Turn the ignition on. t under Monitors, refer to the Trans Msg Present status under Park Assist BUS INFO. t indicate that 9Yes9 the message is present? All Yes → Replace the Park Assist Module in accordance with the Service Information. No → Go To 3 3 Turn the ignition on. t, attempt to establish communication with the TCM. Can the DRBIII establish communication with the TCM? All Yes → Replace the Park Assist Module in accordance with the Service Information. No → Go To 4 901 PARK ASSIST SYSTEM |