Bonneville V6-3800 3.8L Supercharged (1992)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor (TPS)
The Throttle Position Sensor (TPS) is connected to the throttle valve shaft in the throttle body unit. The TPS is a potentiometer with one connection to
ground, and the other to the computer 5.0 volt reference source. A third wire from the computer is used to measure the output voltage from the TPS. As
the throttle angle changes (pressing down on accelerator pedal) so does the TPS voltage output. The computer monitors TPS voltage, uses this
information, compared with information from other sensors, to calculate engine load and adjust injector pulse width to deliver the correct amount of fuel.
