Circuit Description

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

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

TP sensor No. 1 signal voltage increases as throttle opens from less than one volt at zero percent throttle to greater than 3.8 volts at 100 percent throttle. TP sensor No. 2 signal voltage decreases from greater than 3.8 volts at zero percent throttle to less than one 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 the Throttle Actuator Control (TAC) module. DTC will set when TP sensor No. 2 disagrees with TP sensor No. 1 by greater than 7.5 percent and conditions met for less than one second.