Throttle Position Sensor/Switch: Description and Operation

DESCRIPTION
Throttle position sensor
- The throttle position sensor detects the throttle valve position and sends a signal to the TCM.
Throttle position switch
- Consists of a wide open throttle position switch and a closed throttle position switch.
- The wide open throttle position switch sends a signal to the TCM when the throttle valve is open at least 1/2 of the full throttle position. The closed throttle position switch sends a signal to the TCM when the throttle valve is fully closed.