U0402

U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM (FDCM)

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on for 4 seconds, no CAN BUS circuit error condition present, no lost communication with TCM condition present, and no system undervoltage or overvoltage condition present.

- Set Condition:
The Final Drive Control Module is receiving implausible data for gear or PRNDL position from the TCM.





Diagnostic Test

1. TRANSMISSION DTCS PRESENT
Ignition on, engine not running.
With the scan tool, read DTCs in the Transmission Control Module.
Are there any DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.

No

- Replace the Final Drive Control Module.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.