Throttle Position Sensor: Description and Operation

Throttle Position Sensor:

TPS Output Voltage:

PURPOSE
To give the ECCS Control Module (ECM) a reference voltage to indicate throttle position.

OPERATION
The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This system is called "soft closed throttle position switch". This one controls engine operation such as fuel cut.