Transmission Control Module (TCM), Replacing

Transmission Control Module (TCM), Replacing

Work procedure
Check control module identification of the previous Transmission Control Module (TCM) as follows:
- Connect diagnostic tester.
- Switch ignition on.
- Under address word 33, select "Diagnostic mode 9: Vehicle information".
- Select vehicle information 'Test-ID 04: Calibration Identification".

Control module identification will be displayed, e.g.:
01M927733MH0001

- End diagnosis and switch ignition off.
- Remove inner plenum chamber cover.

Vehicles with 01 M transmission







- Open locking mechanism of connector in direction of arrow and disconnect connector from control module.







- Remove mounting bolt (arrow).
- Remove old control module.
- Insert new control module and bolt firmly.

Vehicles with 09G transmission







- Then open locking mechanism of connector in direction of arrow -1- and disconnect connector from control module -2-.
- Remove securing nuts (arrows -3-).
- Remove old control module.
- Insert new control module and bolt firmly.

Continued for all vehicles
- Connect connector to control module and lock.

Rest of installation is performed in reverse order of removal.
- Check whether new control module identification matches old control module identification.

Vehicles with 09G transmission
When harness connectors are disconnected from Transmission Control Module (TCM) or the battery is disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact however. If the engine is started after this, rough, uneven idle can result for a short time. In this case, the readiness code must be generated again.

Continued for all vehicles
If Transmission Control Module (TCM) -J217-was replaced:
- Code the Transmission Control Module (TCM).
- Generate readiness code.