Century V6-204 3.3L VIN N FI (1990)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Idle Air Control Valve (IAC) Reset Procedure
To reset the Idle Air Control (IAC) valve pintle position, proceed with the following:
ENGINE RUNNING:
Accelerate vehicle to over 30 mph OR run engine to over 2000 rpm. Ground the diagnostic test terminal (ALDL) for ten seconds, then remove the
ground. Turn the ignition "OFF," then restart the engine and check for the proper idle operation.
ENGINE NOT RUNNING:
Turn the ignition switch "ON" with the engine "OFF." Ground the ALDL diagnostic test terminal for 5 seconds to seat the IAC valve pintle. Remove the
ground to retract the IAC valve pintle . Turn ignition "OFF" for 10 seconds. Start engine and check for proper idle.
