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 INTAKE AIR CONTROL FUNCTION
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the V-bank cover.
- Connect the hand-held tester (with CAN VIM) to the DLC3.
- Perform the ACTIVE TEST, and then check that the actuator rod operates.
- Start the engine.
- (e) Check that the VSV for IAC valve is ON (seal) under these conditions.
- Depressing the accelerator pedal to a throttle valve opening angle of 60 degrees.
- Racing the engine above 4,700 RPM.
- Check that the VSV for IAC valve is OFF (vent) under these conditions.
- The engine is idling.
- Releasing the accelerator pedal while under the 2 conditions in step ( e).
If the result is not as specified, inspect the IAC valve, vacuum tank and VSV for normal operation. Replace malfunctioning parts as necessary.
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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