Throttle Position Sensor: Description and Operation

THROTTLE POSITION (TP) SENSOR
The TP Sensor is a variable resistor type that rotates with the throttle body throttle shaft to sense the throttle valve angle. As the throttle shaft rotates, the output voltage of the TP Sensor changes. The ECM detects the throttle valve opening based on voltage change.




IDLE POSITION SWITCH
The idle switch senses whether the accelerator pedal is depressed or not, converts it into high/low voltage and input the voltage to the ECM. The TPS includes idle switch.