Idle Air Control (IAC) Valve Inspection

Idle Air Control Valve
1. Disconnect connector from IAC valve.




2. Check each coil of IAC valve for resistance. If resistances is out of specification, replace.
3. Remove air cleaner outlet hose and remove IAC valve from throttle body.
4. Connect connector to IAC valve.




5. Check that plunger (1) of IAC valve moves once and then stops as soon as ignition switch (2) is turned OFF after cranking engine for 2 sec.
If plunger (1) of IAC valve does not operate at all, check wire harnesses for open and short. If wire harnesses are in good condition, replace IAC valve and recheck.

NOTE: This check should be performed by two people, one person operates ignition switch while the other checks plunger operation.