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 IAC valve O-ring sealing surface; pintle valve seat, and air passage as follows:
^ Clean the IAC valve using a shop towel or a pans 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.
^ Whenever air passage have heavy deposits, remove the throttle body for complete cleaning.
^ Inspect IAC valve O-ring for cuts, cracks, or distortion. Replace if damaged.

INSTALLATION PROCEDURE

IMPORTANT: Wherever 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.




1. Perform the IAC valve measurement procedure as follows:
1.1. Measure the distance between tip of IAC valve pintle and mounting flange.
1.2. If greater 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.




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

NOTE: Refer to Fastener Notice in Service Precautions.

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

Tighten
Tighten the IAC valve attaching screws to 3.0 N.m (27 lb in).

5. Install the electrical connector.
6. Reset the IAC valve pintle position as follows:
6.1. Turn On the ignition, with the engine OFF.
6.2. Turn OFF the ignition for ten seconds.
6.3. Start the engine and test for proper idle operation.