Idle Air Control (IAC) Valve Inspection

IDLE AIR CONTROL (IAC) VALVE INSPECTION [BP, BP WITH TC]

NOTE: Perform the following test only when directed.

Simulation Test
1. Carry out the "Idle Air Control (IAC) Inspection". (See Idle Air Control (IAC) Inspection.)
- If not as specified, perform a further inspection of the IAC valve.

Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the IAC valve connector.




3. Measure the resistance between the IAC valve terminals using an ohmmeter.
- If as specified but the Simulation Test is failed, carry out the "Circuit Open/Short Inspection".
- If not as specified, replace the IAC valve. (See IDLE AIR CONTROL (IAC) VALVE REMOVAL/INSTALLATION [BP, BP WITH TC].)

Resistance: 8.7 - 10.5 ohms (24 °C {75 °F})

4. Remove the IAC valve, and inspect it for any damage or clogging.
- If not as specified replace the IAC valve. (See IDLE AIR CONTROL (IAC) VALVE REMOVAL/ INSTALLATION [BP, BP WITH TC].)

Circuit Open/Short Inspection

Open circuit
- Power circuit (IAC valve connector terminal A and PCM connector terminal 2P)
- GND circuit (IAC valve connector terminal B and PCM connector terminal 2Q)

Short circuit
- IAC valve connector terminal A and PCM connector terminal 2P to GND