Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Throttle Valve Control Module, Cleaning
Special tools and workshop equipment required
- Acetone, commercially available
- Brush
If a new Engine Control Module -J623- is installed, then it must be adapted to the throttle valve control module.
Dirt and coking on the end stop can produce incorrect adaptation values.
The throttle valve connections must not be scratched when cleaning.
-- Remove the Throttle Valve Control Module -J338-. Refer to Throttle Valve Control Module -J338-, REMOVING AND INSTALLING .
-- Open the throttle valve by hand and hold it in this position using a plastic or wood wedge -arrow-.
- Wear protective eyewear.
- Wear safety gloves.
-- Clean the throttle valve connection thoroughly with acetone and a brush especially in the area of -arrows- near the closed throttle valve.
-- Wipe the throttle valve connections with a lint-free cloth.
-- Let the acetone dry completely.
-- Install the Throttle Valve Control Module -J338-. Refer to Throttle Valve Control Module -J338-, REMOVING AND INSTALLING .
-- Erase the adaptation values and then adapt the Engine Control Module -J623- to the Throttle Valve Control Module -J338-. To do this, use a Vehicle Diagnostic Tester.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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