Automatic Transmission

Throttle Sensor:

PURPOSE
Provides ECU with signal related to throttle open angle.

LOCATION
Attached to throttle body.

OPERATION
Sensor is a potentiometer attached to the throttle body and splined to the throttle shaft. The potentiometer rotates with the shaft as the throttle opens and closes. Varying potentiometer resistance alters the reference voltage supplied by the ECU, allowing it to read throttle valve opening angle. This input is used in ECU calculations for fuel injection quantity and timing, idle speed control, purge control, A/C cut-off, ignition timing control.