Diagnostics
* Read fault codes from the automatic transmission control module (TCM).
* Check wiring and connectors for damage or corrosion.
* Check the condition of transmission mechanical components such as solenoids and sensors.
Repair
* Replace faulty solenoids or sensors.
* Repair or replace wiring or connectors as necessary.
* Reset TCM adaptations after replacing components.
Repair steps
1. Remove the automatic transmission oil pan and drain the oil.
2. Remove the TCM from the vehicle.
3. Open the TCM and inspect the board for damage or corrosion.
4. If necessary, replace damaged components on the board.
5. Reinstall the TCM on the vehicle.
6. Refill with new ATF and perform the TCM Adaptation Reset procedure.
Tools and materials
* Tool kit for automatic transmission repair
* New ATF fluid
* Hex keys
* Screwdrivers
* Soldering iron (if necessary)
Precautions
* Disconnect the battery before starting work.
* Observe proper safety precautions when working with electrical components.
* Use quality parts and fluids.
*Follow repair instructions carefully.
Note:
* The complexity of the repair depends on the specific malfunction.
*In some cases, the TCM may need to be reprogrammed by a dealer scan tool.
* It is recommended that you take it to a trained mechanic to perform complex repairs.