AIS10 - Check Idle Control Response

^ 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.

^ Goose throttle and let it return to the idle position.

^ Does the engine stall or does the RPM fluctuate excessively before returning to the base idle rpm?

YES -- Go to AIS11. AIS11 - Check IAC Solenoid For Proper Function

NO -- Air Intake system is OK. Return to Diagnostic Routines to check other possible causes of the drive symptoms.