Battery Run Down Protection/Inadvertent Power

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

To provide battery run down protection, the interior/exterior lamps will be deactivated automatically under certain conditions. The BCM monitors the state of the turn signal/multifunction switch and interior lamps. If the turn signal/multifunction switch is placed in the park or headlamp positions when the ignition switch is placed in either the CRANK or RUN position and then placed in the OFF position, the BCM initiates a 10 minute timer. At the end of the 10 minutes, the BCM will command all interior lamps OFF and will send a serial data message to the Lighting Control Module. The Lighting Control Module responds to the input by commanding off the control power output to the park lamp controls as well as the headlamp controls, deactivating the exterior lamps. This feature will be cancelled if any power mode other than OFF becomes active. The BCM will disable battery run down protection if any of the following conditions exist. The park or turn signal/multifunction switch is placed in the ON to OFF position, and back to the ON position during battery run down protection. The BCM determined that the park or turn signal/multifunction switch was not active when the ignition was turned OFF.