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
- CHECK THROTTLE BODY
- Check the throttle control motor operating sounds.
- Turn the ignition switch ON.
- When depressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises emit from the motor. If friction noise exists, replace the throttle body.
- Check the throttle position sensor.
- Turn the ignition switch OFF.
- Connect Techstream to the DLC3.
- Turn the ignition switch ON.
- Turn the tester ON.
- Enter the following menus:
Select: Powertrain / Engine and ECT / Data List / Throttle Position.
- Depress the accelerator pedal. When the throttle valve is fully opened, check that the throttle position value is within the specification.
Standard throttle valve opening percentage: 60% or more
If the result is not as specified, check the accelerator pedal position sensor (See ON-VEHICLE INSPECTION ), wiring and ECM.
If the Techstream is not available, measure the voltage between the terminals (VTA1 - E2, VTA2 - E2) of the ECM connector (See TERMINALS OF ECM ).
- Check 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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