Circuit Description

The Throttle Position (TP) sensor is a potentiometer, mounted on side of throttle body assembly. TP sensor provides a voltage signal that changes relative to throttle blade angle. TP sensor has a 5-volt reference, ground and signal circuit. Signal circuit is pulled up to 5 volts within the ECM. DTC will set when ECM senses a signal voltage outside of the normal operating range of the sensor, in which TP sensor No. 1 and No. 2 difference is greater than 7 percent for at least 140 milliseconds.

ECM will illuminate MIL and records the operating conditions in the Freeze Frame on the second consecutive drive trip that the diagnostic runs and fails. ECM informs the Transmission Control Module (TCM) of this condition and TCM enters the default mode. TCM will also request ECM to illuminate MIL and set DTC P1700.