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.
On-Vehicle Inspection
- INSPECT THROTTLE BODY
- Listen to the throttle control motor operating sounds.
- Turn the ignition switch to the ON position.
- When pressing the accelerator pedal position sensor lever, listen to the running motor. Make sure that no friction noise comes from the motor.
If friction noise exists, replace the throttle body assembly.
- Inspect the throttle position sensor.
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Check that the MIL turns off.
- Under CURRENT DATA, the throttle valve opening percentage (THROTTLE POS) should be within the standard range below.
Standard throttle valve opening percentage:
60% or more
If the percentage is less than 60%, replace the throttle body assembly.
NOTE: When checking the throttle valve opening percentage, the transmission should be in neutral.
- Listen to the throttle control motor operating sounds.
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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