On-Vehicle

1. INSPECT IAC VALVE FOR OPERATING SOUND.





- Check that there is a clicking sound immediately after stopping the engine.
- If operation is not as specified, check the IAC valve, wiring and ECM.
2. INSPECT AIR ASSIST SYSTEM.
- Warm up engine
- Allow the engine to warm up to normal operating temperature.
- Check idle speed

Idle speed: 700 ± 50 rpm
(Transmission in neutral position)





- Check IAC Valve Operation
- With engine idling, pinch the air hose and check that engine speed drops, and then returns back up to idle speed.
- If operation is not as specified, check the IAC valve, wiring and ECM.





3. INSPECT IAC VALVE RESISTANCE.

NOTICE: Cold and Hot in the following 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 (or B2) to others).

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

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