Circuit Description

The Throttle Position (TP) sensor is a potentiometer, mounted on throttle body/TAC assembly. TP sensor is actually 2 sensors within one housing. Two separate signal, ground and reference circuits are used in order to connect the TP assembly and Throttle Actuator Control (TAC) module.

TP sensor No. 1 signal voltage increases as throttle opens. The signal circuit for TP sensor is pulled up to reference voltage. DTC will set when TP sensor No. 2 voltage is less than 0.25 volt or greater than 4.5 volts for less than one second.