Checking the Transmission Control Module (TCM)
- Ignition off.
- Try a new transmission control module (TCM) according to Replacing The Transmission Control Module (TCM)
.NOTE:
Mark the old control module so that it cannot be mistaken for the new one.
- Ignition on.
Erase any diagnostic trouble codes (DTCs) stored in the new control module.
- Continue
Refer to Read off the status of the diagnostic trouble code (DTC)