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 - S4 in sequence, check that the valve moves toward the open position.
- If operation is not as specified, replace the IAC valve.