On-Vehicle

IAC Valve On-Vehicle Inspection





1. Inspect IAC valve for operating sound.
- Check that there is a clicking sound immediately after stopping the engine.
- If the operation is not as specified, check the IAC valve, wiring and ECM.
2. Inspect IAC valve resistance.

NOTICE: "Cold" and "Hot" in these 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).

- Disconnect the IAC valve connector.





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

Resistance:
Cold:15-25 Ohms
Hot: 20-30 Ohms

- If resistance is not as specified, replace the IAC valve.
- Reconnect the IAC valve connector.