Powertrain Control Module (PCM)

U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Continuously while the system is active.

- Set Condition:
An error message has been received over the BUS from the Transmission Control Module (TCM). If the vehicle is equipped with the stop/start feature, the system will be disabled when this DTC is active.





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

Diagnostic Test

1. ACTIVE DTC

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

1. Ignition on, engine not running.
2. With a scan tool, view DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT DTC diagnostic procedure. Intermittent Condition Test.

2. TCM COMMUNICATION RELATED DTCs IN OTHER MODULES
1. With the scan tool, select Network Diagnostics.

Is there more than one module with active DTCs "Logged Against" the TCM at this time?

Yes

- Replace and program the Transmission Control Module (TCM). Transmission Control Module - Description.
- Perform the NAG1 TRANSMISSION VERIFICATION TEST.

No

- Replace and program the Powertrain Control Module. Powertrain Control Module - Removal.
- Perform the PCM VERIFICATION TEST. Powertrain Verification Test.