Throttle Body: Operation
WARNING: This page is about a different car, the 2006 Chrysler Crossfire. However, it is still accessible from the selected car via links, so may be relevant.
Filtered air from the air cleaner enters the intake manifold through the Throttle Body. A throttle valve (plate) is used to supply air for idle and driving conditions.
The Throttle Position Sensor is part the Throttle Body. The Throttle Position Sensor signal is used by the PCM to determine throttle position. The PCM controls the Electronic Throttle Control of the Throttle Body. The PCM monitors the Accelerator Pedal Position Sensor to determine the amount of throttle opening.