Throttle Position Sensor

DESCRIPTION
The Throttle Position Sensor (TPS) is a variable resistor that provides the Jeep/Truck Engine Controller (JTEC) with an input signal (voltage) that represents throttle blade position. The sensor is connected to the throttle blade shaft. As the position of the throttle blade changes, the resistance of the TPS changes.

OPERATION
The JTEC supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the JTEC) represents the throttle blade position. The JTEC receives an input signal voltage from the TPS. This will vary in an approximate range of from 1 volt at minimum throttle opening (idle), to 4 volts at wide open throttle. Along with inputs from other sensors, the JTEC uses the TPS input to determine current engine operating conditions. In response to engine operating conditions, the JTEC will adjust fuel injector pulse width and ignition timing.

Fig. 15 MAP And Throttle Position Sensor Location - Typical:

LOCATION
The TPS is mounted on the throttle body.