U0402

U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM



- When Monitored:
Continuously while the system is active.

- Set Condition:
Implausible data has been received over the bus from the Transmission Control Module (TCM).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC

NOTE: Diagnose all CAN B and C communication DTCs before continuing.

1. Turn the ignition on.
2. With a scan tool, view DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Checking for an Intermittent DTC.

2. TCM COMMUNICATION RELATED DTCS IN OTHER MODULES
1. With a scan tool check for TCM communication related DTCs in other modules on the CAN Bus.

Are there any TCM communication related DTCs in other modules on the CAN Bus at this time?

Yes

- Replace and program the Transmission Control Module (TCM).
- Perform the PCM Verification Test. PCM Verification Test.

No

- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM Verification Test. PCM Verification Test.