AIS11 - Check IAC Solenoid For Proper Function

^ Transmission in Park.

^ A/C, heater and all accessories off.

^ Engine at normal operating temperature and cooling fan off, but not unplugged.

WARNING: Do not unplug cooling fan. It may cause engine overheating.

^ Key On, Engine Running.

^ Disconnect IAC solenoid vehicle harness connector.

^ Does the RPM drop or engine stall?

YES -- For Fast Idle Symptom: Go to A1S12. AIS12 - Check IAC Circuit For Short to Ground

For All Other Symptoms: Throttle body is defective, Replace the entire throttle body assembly. Clear Keep Alive Memory.

NOTE: Do not attempt to clean throttle bore or throttle plate area. Do not adjust air flow.

NO -- IAC solenoid is defective, Replace IAC solenoid only. Clear Keep Alive Memory.

NOTE: Do not attempt to clean the IAC solenoid.