Accelerator Pedal Position Sensor: Description and Operation

COMPONENT DESCRIPTION
Electric Throttle Control Actuator consists of throttle control motor, acceleration pedal position sensor, throttle position sensor, etc.

Accelerator pedal position sensor is connected to the accelerator pedal through the throttle drum and accelerator wire, and detects the accelerator pedal position by the throttle drum rotation angle.

Accelerator pedal position sensor has the two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.

Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation such as fuel cut.