Component Inspection

IAC VALVE INSPECTION

1. INSPECT VALVE RESISTANCE

NOTICE: "Cold" and "Hot" in these sentences express the temperature of the coils themselves. Cold is from 100°C (14°F) to 50°C (122°F) and Hot is from 60°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:
Cold: 31 - 61 Ohms
Hot: 38 - 71 Ohms

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.