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 -J338-, Checking: Function
Throttle valve operation occurs by an electric motor identified as EPC Throttle Drive -G186- located within the Throttle Valve Control Module - J338-. It is controlled by the Engine Control Module - J623- with primary inputs from the Accelerator Pedal Position Sensor -G79- / Accelerator Pedal Position Sensor 2 -G185- as well as other peripheral inputs from Throttle Position Sensor -G69-.
The Throttle Valve Control Module -J338- contains the following components:
- EPC Throttle Drive -G186-
- Throttle Position Sensor -G69-
- EPC Throttle Drive Angle Sensor 2 -G188-
The Throttle Valve Control Module -J338- components cannot be serviced separately, it must be serviced as a unit.
Special Tools And Workshop Equipment Required
- Multimeter
- Wiring Diagram
- Scan Tool
NO RELATED
Use the Manual With the Right Hardware
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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.