On-Vehicle Inspection

ON-VEHICLE INSPECTION

1. Inspect IAC valve for operating sound.

IAC Inspection:

- 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.
A. Warm up engine
- Allow the engine to warm up to normal operating temperature.
B. Check idle speed

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

C. Check IAC valve operation

Air Hose:

- 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 100°C (122°F) to 100°C (212°F).

Ohmmeter Connection:

- 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.