Throttle Body: Description and Operation

PURPOSE
The Throttle body, located at the opening of the Intake Manifold, controls intake air by varying throttle plate opening. Also houses the Idle Air Control Valve and Throttle Position Sensor(s).

OPERATION
When the driver operates the accelerator pedal, the throttle valve is opened via the throttle cable. Idle speed is not adjustable and is controlled by the Idle Air Control Valve.