Impreza Sedan AWD F4-1820cc 1.8L SOHC (1993)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor
PURPOSE
The throttle position sensor contains a potentiometer (variable resistor). The ECM uses this signal to adjust air/fuel ratio during acceleration,
deceleration and idle.
LOCATION
Mounted to the throttle body in the engine compartment.
OPERATION
The sensor sends the ECM a potentiometer output signal corresponding to throttle valve opening.