Hood Ajar Operation - Body Control Module

The BCM applies B+ to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. The hood ajar switch contains a multiplexed resistor. This resistor will vary the voltage seen by the BCM by pulling down the applied voltage based on the position of the switch. The body control module uses to hood ajar input as a means to determine if unauthorized access has been gained to the underhood area during a theft attempt. The body control module will also disable remote vehicle starting (if equipped) when the hood is ajar.