Circuit/System Description
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
The neutral position sensor is a three wire sensor, connected to a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 V to the neutral position sensor, and also provides a sensor ground path on the low reference circuit. The neutral position sensor sends a voltage signal to the ECM on the signal circuit. The voltage on the signal circuit will vary from a voltage less than or equal to 5 V when the transmission is in the neutral position, to a voltage less than or equal to 1.5 V when the transmission is in gear. The neutral position sensor signal is used as an in gear or neutral input to the ECM for the Autostart/Autostop function.