Engine Control Module, Replacing

Engine Control Module, Replacing

Removing

Special tools, testers and auxiliary items required

• Heat gun.

• When the Engine Control Module (ECM) (J623) electrical harness connectors are disconnected, the adaptation values are erased and the DTC memory content remains intact.

Work procedure

Check the identification of the previous Engine Control Module (ECM) (J623) as follows:

- Connect the scan tool.

- Switch the ignition on.

- Using the scan tool, select "Vehicle information".

- Select " Calibration Identification" in vehicle information.

The electronic control module identification number will be displayed, e.g. 06A906032NA 4983

- Record the electronic control module identification number.

- End diagnosis and switch the ignition off.

Procedure

- Switch the ignition on.

- Actuate the touch-wipe function to allow the wipers to move to the end position.

• The wiper arms will now move into the line of view on the windshield (service position).

- Remove the wiper arms caps.

- Loosen the wiper arm nuts - arrows - several turns.





- Loosen the wiper arms from the wiper axle by rocking slightly.

• Do not force wiper arms off. If the wiper arms cannot be removed, use a standard puller.

- Remove the wiper arms nuts and the wiper arms from the wiper axles.

- Remove the rubber seal - 1 - and the plenum chamber cover - 2 -.





- Remove the retaining screw - arrow - and the Engine Control Module (ECM) (J623).





- Disconnect the Engine Control Module (ECM) (J623) electrical harness connector T81 - 1 -.





To prevent damage (burning) to the wiring and harness connections, insulation and the electronic control module, perform the following work steps exactly! Observe operating instructions for the heat gun.

The heat gun, shear bolts, and parts of the protective housing will become extremely hot. Use extreme caution when working with or handling these parts to avoid personal injury.

• The threads of the shear bolts have been coated with a locking compound and must be heated to be removed.

• Heat only the shear bolts that are not installed in the Engine Control Module (ECM) (J623).

- Using a Heat gun set at its lowest setting, heat the shear bolts- arrows - for approx. 20 to 25 seconds.





- Remove the shear bolts - arrow - with locking pliers. Discard the used shear bolts.





- Remove the protective housing - 1 - from the Engine Control Module (ECM) (J623).





- Disconnect the Engine Control Module (ECM) (J623) electrical harness connector T40 - 2 - from the Engine Control Module (ECM) (J623).

Engine Control Module (ECM) (J623) installation

Installation is performed in reverse order of removal. Note the following:

The Engine Control Module (ECM) (J623) must be installed with the protective housing.

Use New shear bolts when installing the Engine Control Module (ECM) (J623).

Engine Control Module (ECM) (J623) reprogramming

- The new Engine Control Module (ECM) (J623) and immobilizer must be activated. Refer to the => Ebahn website for ECM and immobilizer activation instructions.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Engine.

End of procedure