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

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.

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

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

Resistance

8.8-10.6 ohms [24°C {75 °F}]

Circuit Open/Short Inspection

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 GND

- IAC valve terminal B and power supply