Off-Vehicle

1. INSPECT VALVE RESISTANCE

NOTICE: "Cold" and "Hot" in those sentences express the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).





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





Resistance
If resistance is not as specified, replace the IAC valve.

2. INSPECT IAC VALVE OPERATION





(a) Apply battery voltage to terminal B1 and B2 and while repeatedly grounding S1 - S2 - S3 - S4 - S1 in sequence, check that the valve moves toward the closed position.





(b) Apply battery voltage to terminal 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.