This is actually just a potentiometer (variable resistor, sometimes called a rheostat), by turning the throttle body plate it rotates a shaft in the sensor causing different voltages to output. There are 3 wires: ground, +5V, and the sensor output. The different resistances caused by the rotating shaft vary the voltage output on the sensor output wire, the ECM then measures this voltage to determine how far the throttle is open. The sensor is located on the throttle body opposite the throttle lever.
0% throttle is usually about .5V and 100% throttle is around 4.5V
0% throttle is usually about .5V and 100% throttle is around 4.5V
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