Engine Control Module: Service and Repair

Motronic Engine Control Module (J220)

• If it is necessary to replace the Engine Control Module (ECM) , connect the vehicle diagnostic tester and perform "Replace control module".

When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:

• Route lines of all types (for example, fuel, hydraulic, Evaporative Emission (EVAP), coolant, refrigerant, brake fluid and vacuum) and electrical wiring so that the original path is followed.

• To prevent damage to the lines, make sure there is sufficient clearance to all moving or hot components.

Removing

- Turn off the ignition.

- Remove the E-box cover inside the engine compartment - arrows -.






Vehicles with Anti-Theft Protection:






- Disconnect the threaded connection - 2 -.

- Remove the locking mechanism - 5 -.

- Disconnect the connectors - 1 and 3 - from the ECM.

Only if the ECM has to be replaced:

- Remove the threaded connections - 6 - and the bracket - 4 -.

Vehicles without Anti-Theft Protection:

- Disconnect the connectors - 1 and 3 - from the ECM.

Continuation for all Vehicles:






- Push the tabs on the side guides - 3 - carefully toward the outside with a screwdriver - 2 -.

- Remove the ECM - 1 - from the guides - 3 -.

Installing

- Install the ECM - 1 - into the guides - 3 - until it locks.






Vehicles with Anti-Theft Protection:






- Attach the bracket - 4 - to the ECM with the shear bolts - 6 -.

- Tighten the shear bolts - 6 - just enough until the bolt head breaks off.

- Connect the connectors - 1 and 3 - to the ECM.

- Install the locking mechanism - 5 - with shear bolts - 2 -.

- Tighten the shear bolts - 2 - just enough until the bolt head breaks off.

Vehicles without Anti-Theft Protection:

- Connect the connectors - 1 and 3 - to the ECM.

Continuation for all Vehicles:






- Install the E-box cover - arrows -.