Electronic Throttle Control System Description - Control
When the accelerator pedal is operated, accelerator pedal position or APP sensor is driven and the accelerator pedal position is detected. The accelerator pedal position is delivered to the PCM, and the PCM drives the throttle actuator in the throttle body based on the delivered position to open and close the throttle valve.
Throttle position is detected by the throttle position or TP sensor in the throttle body and delivered to the PCM.