Throttle Body: Description and Operation
THROTTLE BODYDESCRIPTION
The Throttle Body is located on the intake manifold. The Throttle Body controls the amount of air that enters the intake manifold. Fuel does not enter the intake manifold through the Throttle Body. Fuel is sprayed into the manifold by the fuel injectors.
OPERATION
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.