Idle Speed/Throttle Actuator - Electronic: Service and Repair

REMOVAL PROCEDURE




1. Remove the IAC valve electrical connector
2. Remove the IAC valve attaching screws (1).

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.

3. Remove the IAC valve assembly (2).
4. Clean the following areas:
^ The IAC valve - Use a shop towel or parts cleaning brush to remove heavy deposits.
^ The IAC valve O-ring - Inspect for cuts, cracks or distortion. Replace if damaged.
^ The IAC valve O-ring sealing surface.
^ The pintle valve seat - Shiny spots on the pintle or seat are normal and do not indicate misalignment or a bent pintle shaft.
^ The air passage - Whenever air passage have heavy deposits, remove throttle body for complete cleaning.
5. Whenever installing a new IAC valve, be sure to replace it with an identical part. IAC valve pintle shape and diameter are designed for the specific application.

MEASUREMENT PROCEDURE

The following 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.




1. Measure the distance between tip of IAC valve pintle and mounting flange.
2. If the measurement is more than 28 mm, 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.
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 3.0 N.m (27 lb in).

4. Install the electrical connector.
5. To reset the IAC valve pintle position:
5.1. Turn ON the ignition, with the engine OFF.
5.2. Turn the ignition OFF for ten seconds.
5.3. Start the engine and check for proper idle operation.