On-Vehicle Inspection

ON-VEHICLE INSPECTION

1. Inspect IAC valve for operating sound.




Check that there is a clicking sound immediately after stopping the engine.
If the operation is not as specified, check the IAC valve, wiring and ECM.
2. Inspect IAC valve resistance.
(a) Disconnect the AC valve connector.




(b) Using an ohmmeter, measure the resistance between the terminals (B1 - S1 and S3, B2 - S2 and S4).

Resistance:
At Cold: -10 - 50°C (-50 - 122°F): 15 - 25 ohms
At Hot: 50-100°C (122 - 212°F): 20 - 30 ohms

If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.