IDLE AIR CONTROL (IAC) VALVE INSPECTION[ZJ, ZY, Z6]

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Without Throttle Valve Actuator Only

Resistance Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the IAC valve connector.

3.  Measure the resistance between IAC valve terminals A and B.

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•  If within the specification, carry out the “Circuit Open/Short Inspection”.

•  If not within the specification, replace the IAC valve.

Circuit Open/Short Inspection

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1.  Inspect the following wiring harnesses for an open or short circuit. (Continuity check)

Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the wiring harness.

―  IAC valve terminal A and PCM terminal 2X

―  IAC valve terminal B and PCM terminal 2AB

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

―  IAC valve terminal A and body ground

―  IAC valve terminal B and power supply