Theory Of Operation
WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
The primary 5-Volt Supply circuit supplies the Crankshaft Position Sensor (CKP), Oil Pressure Sensor (OPS), Throttle Body Assembly, and Accelerator Pedal Position (APP) Sensor 1. For self protection, if the 5-Volt Supply circuit is shorted to ground or if one of the sensors is internally shorted, the Powertrain Control Module (PCM) will turn off the 5-Volt Supply circuit until the next ignition cycle.