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
- INSPECTION THROTTLE BODY
- Inspect the throttle control motor for operating sound.
- Turn the ignition switch ON.
- When turning the accelerator pedal position sensor lever, check the running sound of the motor. Also, check that there is no friction sound.
- Inspect the throttle position sensor.
- Connect the LEXUS hand-held tester or OBD II scan tool to the DLC3.
- Turn the ignition switch ON.
- Check that the check engine warning light does not light up.
- Check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shown the standard value.
Standard throttle valve opening percentage: 60% or more
- Inspect the throttle control motor for operating sound.
- INSPECT ACCELERATOR PEDAL POSITION SENSOR
- When turning ignition switch ON, check that the voltage of the throttle position sensor of the CURRENT DATA shown the standard value.
Standard voltage: 0.6 - 1.0 V
- When turning ignition switch ON, check that the voltage of the throttle position sensor of the CURRENT DATA shown the standard value.
- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY
- Connect the LEXUS hand-held tester or OBD II scan tool to the DLC3.
- Turn the ignition switch ON.
- Start the engine and warmed it up.
- Connect the LEXUS hand-held tester and select the VVT from the ACTIVE TEST menu.
- Check the engine speed when the OCV is operated by the LEXUS hand-held tester.
Standard:
VVT system is OFF (OCV is OFF): Normal engine speed
VVT system is ON (OCV is ON): Rough idle or engine stalled
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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