Beretta L4-138 2.3L DOHC QUAD 4 HO MFI VIN A (1994)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor (TPS)
Throttle Position Sensor (TPS)
PURPOSE
The Throttle Position Sensor (TPS) is a non-adjustable potentiometer that senses throttle angle and relays the information to the PCM. This input
to the PCM is used to control the fuel system and most of the PCM outputs.
OPERATION
The TPS has internally three circuits. One to ground, the other from the PCM as a 5.0 volt reference source and a third circuit is used by the PCM
to measure the output voltage. As the throttle angle changes (pressing down on accelerator pedal) the TPS voltage output varies from about .5 volt
at idle to about 4.9 volts at wide open throttle (WOT).
LOCATION
Side of throttle body opposite of throttle lever.
