Idle Speed / Idle Air Control (IAC) Duty Inspection: Notes

Before idle speed/IAC duty check, make sure of the following.

Lead wires and hoses of engine/emission control systems are connected securely.
Accelerator cable is adjusted.
Ignition timing is within specification.
All accessories (wipers, heater, lights, A/C, etc.) are out of service.
Air cleaner has been properly installed and is in good condition.
ECM does not detect any malfunction DTC.

After above items are all confirmed, check idle speed and IAC duty as follows.

NOTE: Before starting engine, place transmission gear shift lever in "Neutral" (shift selector lever to "P" range for A/T vehicle), and set parking brake and block drive wheels.