Rear Compartment Lamp On
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
This input to the BCM is used to determine if the rear compartment lid is open or closed. If the rear compartment lamp is on, the scan tool displays ON. The BCM uses this input for theft deterrent purposes.