IDLE AIR CONTROL (IAC) SOLENOID VALVE INSPECTION[AJ (3.0L Duratec)]


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Resistance Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the IAC solenoid valve connector.

3.  Using a tester, measure the resistance between the IAC solenoid valve terminals.

•  If it is within the specification, inspect the related harnesses.
•  If it is not within the specification, replace the IAC solenoid valve.
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IAC solenoid valve resistance
8.8—10.6 ohms [24 °C {75 °F}]


Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

2.  Inspect the following wiring harness for open or short (continuity check).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the harness.
―  IAC solenoid valve terminal A and main relay terminal B
―  IAC solenoid valve terminal B and PCM terminal 83


Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.
―  IAC solenoid valve terminal A and body ground
―  IAC solenoid valve terminal B and power supply