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
Throttle Valve Control Module (TVCM) located on intake manifold contains throttle drive actuator, angle sensor No. 1 and angle sensor No. 2. There are no serviceable parts in TVCM, and housing should not be opened. Throttle drive actuator is an electric stepper motor activated by the ECM. Stepper motor opens throttle against spring pressure. Angle sensors are potentiometers that communicate throttle valve position to ECM independent of each other. Angle sensors cannot be mechanically adjusted. Adjustments are performed using VAS 5051 scan tool in function 04 - BASIC SETTING. See FUNCTION 04 - BASIC SETTING under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article. Mechanical testing of TVCM consists of checking TVCM harness connector for loose or corroded terminals.
To test TVCM, see appropriate DTC under DIAGNOSTIC TROUBLE CODE DEFINITIONS in appropriate SELF-DIAGNOSTICS article.
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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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