SFGE/SFI System 2JZ-GE — Idle Air Control (IAC) Valve On-Vehicle Inspection, page 39

EG-225
ENGINE – SFI SYSTEM (2JZ-GE)

IDLE AIR CONTROL (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 operation is not as specified, check the IAC valve, wiring and ECM.

2. California only:
INSPECT AIR ASSIST SYSTEM

A. Warm up engine
Allow the engine to warm up to normal operating temperature.

B. Check idle speed
Idle speed (Transmission in neutral position):
700 ± 50 rpm

C. 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.

Pinch
Air Hose
P11466

3. INSPECT IAC VALVE RESISTANCE
Using an ohmmeter, measure the resistance between the terminals (B1 (or B2) to others).
Resistance:
At 20°C (68°F) 18–22 Ω
If the resistance is not as specified, replace the IAC valve.

Ohmmeter
S3  S4
B1  B2
S1  S2
P11980

P11465