Circuit Description

The Throttle Position (TP) sensor incorporates 2 TP sensors into one housing. TP sensor 1 and TP sensor 2 each have a 5 volt reference circuit supplied by the ECM. The ECM supplies each TP sensor with a low reference circuit. Each TP sensor supplies the ECM with a signal voltage that is proportional to the throttle plate position. The TP signal voltages are opposite from one another. TP sensor 1 is pulled up to reference voltage as the throttle plate is opened.

The TP sensor 2 is pulled down to low reference as the throttle plate is opened.