Off-Vehicle

1. INSPECT VALVE RESISTANCE.





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

Resistance: 34 - 54 0hms (at 20°C)

- If resistance is not as specified, replace the Idle Air Control (IAC) valve.





2. INSPECT IAC VALVE OPERATION.
- Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S1 - S2 - S3 - S4 - S1 in sequence, and check that the valve moves toward the closed position.





- Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S4 - S3 - S2 - S1 - S 4 in sequence. and check that the valve moves toward the open position.
- If operation is not as specified, replace the IAC valve.