C 2500 Suburban 2WD V8-350 5.7L (1994)
Throttle Position Sensor: Description and Operation
Throttle Position (TP) Sensor Circuit
Purpose:
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 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. By monitoring TPS voltage
output, the computer can determine fuel delivery rate based on throttle valve angle or driver demand.
