Off-Vehicle Inspection

1. INSPECT IDLE AIR CONTROL (IAC) VALVE RESISTANCE.

NOTICE: Cold and Hot in these sentences express the temperature of the valve itself. 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 terminal +B and other terminals (RSC, RSO).

Resistance:
Cold: 17.0 - 24.5 0hm; Hot: 21.5 - 28.5 0hms

If resistance is not as specified, replace the IAC valve.
2. INSPECT IAC VALVE OPERATION.





- Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSC, and check that the valve is closed.





- Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSO, and check that the valve is open.