Hood Ajar Switch
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The hood ajar switch provides closure status of the hood to the body control module (BCM). The switch is integrated into the hood latch assembly. The hood ajar switch provides two separate inputs to the BCM. These separate inputs allow the BCM to actively monitor for a hood ajar switch fault.
The BCM uses the hood ajar switch as a content theft deterrent alarm trigger.