Electronic Throttle Control Module: Service and Repair

Throttle Valve Control Module, Cleaning

• If a new engine control module (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 throttle valve control module (J338). Refer to => [ Throttle Valve Control Module ] .

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






Acetone is easily inflammable. Observe accident prevention measures and safety information when working with easily inflammable fluids. Do not used compressed air when cleaning throttle valve. Wear protective goggles and protective clothing to prevent injuries and contact with skin.

- Clean the throttle valve thoroughly, especially around the area of the closed throttle - arrows -, with acetone which conforms to DIN 53247 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 engine control module to the engine control module. Use a vehicle diagnosis tester for this.