Idle Speed/Throttle Actuator - Electronic: Service and Repair

IDLE AIR CONTROL (IAC) VALVE REPLACEMENT

REMOVAL PROCEDURE




1. Disconnect the idle air control (IAC) valve harness connector.
2. Remove the IAC valve attaching screws (1).
3. Remove the IAC valve (2) from the throttle body.
4. Remove the IAC valve O-ring (3).
- Clean IAC valve O-ring sealing surface, pintle valve seat, and air passage.
- The IAC valve may be cleaned, use a shop towel or parts cleaning brush to remove heavy deposits.
- Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
- If heavy deposits are present, remove throttle body for complete cleaning.
- Inspect IAC valve O-ring for cuts, cracks, or distortion. Replace if damaged.

NOTE: If the IAC valve has been in service: DO NOT push or pull on the IAC valve pintle. The force required to move the pintle may damage the threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid cleaner or solvent, as damage may result.

MEASUREMENT PROCEDURE
This procedure is only for installing a new IAC valve

IMPORTANT: If installing a new IAC valve, replace the IAC valve with an identical part. The IAC valve pintle shape and diameter are designed for the specific application.




Measure the distance between tip of IAC valve pintle and mounting flange.

If greater than 28 mm (1.10 in), use finger pressure to slowly retract the pintle. The force required to retract the pintle of a new valve will not cause damage to the valve.

INSTALLATION PROCEDURE




1. Lubricate IAC valve O-ring (3) with clean engine oil and install on the IAC valve (2).
2. Install the IAC valve assembly (2).

NOTE: Refer to Fastener Notice in Service Precautions.

3. Install the IAC valve attaching screws (1).

Tighten
Tighten the IAC valve attaching screws to 3 N.m (27 lb in).

4. Connect the IAC valve harness connector.
5. To reset the IAC valve pintle position:
5.1. Turn ON the ignition, with the engine OFF.
5.2. Turn OFF the ignition for 10 seconds.
5.3. Start the engine and inspect for proper idle operation.