Throttle Position Sensor: Description and Operation

PURPOSE
The Throttle Position (TP) sensor detects throttle plate opening angle and sends the Powertrain Control Module (PCM) an input signal indicating throttle position. The PCM uses this information to modify air/fuel mixture, idle speed, injector timing, ignition timing, fuel pressure, A/C cutoff, and purge flow.

OPERATION
Sensor produces signals for a wide range of throttle plate angles, along with signals for both idle and off idle. Wide range signal is produced by a potentiometer.