Escort L4-110 1.8L DOHC (1994)
Throttle Position Sensor: Description and Operation
With Automatic Transaxle
Throttle Sensor
PURPOSE
Provides Powertrain Control Module (PCM) with signal related to throttle open angle.
CONSTRUCTION
Sensor consists of a combination potentiometer and idle switch.
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 PCM, allowing it to read throttle valve opening
angle. This input is used in PCM calculations for fuel injection quantity and timing, idle speed control, purge control, A/C cut-off, ignition timing
control.