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.
Inspection Procedure
HINT:
Read freeze frame data using the hand-held tester or the OBD II. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
- Visually check throttle valve.
PREPARATION:
Remove the intake air resonator
CHECK:
Check whether or not a foreign body exists between the throttle valve and housing. Also, check if the valve can open and close smoothly.
- NG: Remove foreign body and clean throttle body.
- OK: Go to next step.
- Check throttle control motor (See THROTTLE BODY
).
- NG: Replace throttle control motor with magnetic clutch (See REPLACEMENT ).
- OK: Go to next step.
- Check for open and short in harness and connector between ECM and throttle conform motor (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
).
- NG: Repair or replace harness or connector.
- OK: Check for intermittent problems (See PRE-CHECK ).
NO RELATED
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.