Air Cleaner - Automatic Temperature Control: Description
All throttle body fuel injected models are equipped with an Automatic Temperature Control (ATC) air cleaner assembly. This device maintains temperature of air entering throttle body within a constant range. This provides leaner air/fuel mixture to reduce harmful exhaust emissions.
In addition, the ATC air cleaner improves engine warm-up characteristics and helps prevent throttle body icing. The ATC air cleaner assembly consists of an air cleaner housing, vacuum motor, temperature sensor, air control valve, hot air duct, fresh air duct, and various connecting hoses.