Using a wrench, remove the IAC valve by turning it counter-clockwise (loosen) and remove the valve. Spray it down with carburetor cleaner until it’s clean and then proceed to spray some WD-40 on it for that little added protection. You can use a soft brush (like a toothbrush) to help with the cleaning.
How do you clean an IAC valve on a Toyota?
What are the symptoms of idle air control valve?
One of the most common symptoms associated with a problematic idle air control valve is irregular idle speed. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls.
How do you test a Toyota IAC valve?
Related Question How do you clean the idle air control valve on a Toyota?
What is the function of idle air control valve?
The idle air control (IAC) valve is located on the throttle body of fuel-injected engines, where it works with the vehicle's ECU to electrically regulate airflow to the engine to ensure smooth idling.