Electronic Throttle Control Module: Description and Operation

Throttle Valve Control Module (J338), Cleaning

• If a new Engine Control Module (ECM) (J623) is installed, then it must be adapted to the throttle valve control module.

• The throttle valve connections must not be damaged when cleaning.

- Remove the throttle valve control module. Refer to => [ Throttle Valve Control Module (J338) ] Service and Repair.

- Open the throttle valve by hand and hold it in the open position with a suitable object (for example, a plastic or wood wedge) - arrow -.






Acetone is easily flammable. Observe accident prevention measures and safety information when working with easily flammable fluids. Do not used compressed air when cleaning the throttle valve. Always wear safety glasses and protective clothing to prevent injuries and fuel from coming in contact with your skin.

- Clean the throttle valve connections, especially in the area - arrows - of the closed throttle valve, with standard acetone and a brush.






- Wipe throttle valve connections with a lint-free cloth.

- Allow acetone to dry completely and reinstall cleaned throttle valve control module.

- Erase the adaptation values and adapt the ECM to the throttle valve control module. Use vehicle diagnostic tester for this.