Throttle Body (TB) Assembly

The throttle body assembly controls airflow to the engine through a single butterfly-type valve. The throttle position is controlled by multiple-link, progressive opening, throttle linkage. The body is a one-piece die casting made of aluminum. It has a single bore with an air bypass channel around the throttle plate. This bypass channel controls both cold and warm engine idle airflow control as regulated by an idle air control (IAC) 9F715 valve assembly mounted directly to the throttle body. The valve assembly is an electro-mechanical device controlled by the powertrain control module (PCM). It incorporates a linear actuator which positions a variable area metering valve.