Idle Speed/Throttle Actuator - Electronic: Service and Repair

IAC Valve:

REMOVAL
1. Disconnect the idle air control (IAC) valve electrical connector.
2. Remove the IAC valve attaching screws.
3. Remove the IAC valve assembly.

CAUTION: 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.

4. Clean the IAC valve O-ring sealing surface, pintle valve, seat and air passage.
^ Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. DO NOT use a cleaner that contains Methyl Ethyl Ketone. It is an extremely strong solvent, and not necessary for this type of deposit.
^ Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
^ If the air passage has heavy deposits, remove the throttle body for complete cleaning.
^ Inspect the IAC valve O-ring for cuts, cracks or distortion. Replace if damaged.

NOTE: If installing a new IAC valve, be sure to replace with an identical part. IAC valve pintle shape and diameter are designed for specific application.

INSTALLATION
1. If installing a new IAC valve, measure the distance between the tip of the pintle and the mounting flange.
^ 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 the IAC valve O-ring with clean engine oil.
3. Install the IAC valve assembly.
4. Install the IAC valve attaching screws, and torque to 3.0 Nm (27 lb in).
5. Connect the IAC valve electrical connector.
6. Reset the IAC valve pintle position:
^ Disconnect battery cable for 10 seconds.
^ Reconnect battery cable.
^ Turn ignition "ON," engine "OFF" for five seconds.
^ Turn ignition "OFF' for ten seconds.
^ Start engine and check for proper idle operation.