Circuit Description

The Throttle Position (TP) sensor is a potentiometer, mounted on side of Air Control Valve assembly (throttle body). TP sensor is actually 2 sensors within one housing.

TP sensor No. 1 signal voltage increases as throttle opens from, less than 1.1 volt at zero percent throttle to greater than 3.7 volts at 100 percent throttle. TP sensor No. 2 signal voltage decreases from greater than 3.9 volts at zero percent throttle to less than 1.2 volt at 100 percent throttle.

Signal circuit for TP sensor No. 1 is pulled up to 5 volts and signal circuit for TP sensor No. 2 is pulled to ground through Throttle Actuator Control (TAC) module.

Conditions for setting DTC are: DTCs P0606, P1517 or P1518 not set, ignition switch in CRANK or RUN position, ignition voltage greater than 5.23 volts, TP sensor No. 1 voltage less than.13 volt or greater than 4.87 volts and conditions met for less than one second.