BCM (vehicles equipped with rear only parking aid camera)
WARNING: This page is about a different car, the 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The BCM serves as a gateway between the rear parking aid camera and other modules on the HS-CAN1. It communicates with the rear camera via the LIN and stores Diagnostic Trouble Codes (DTCs) for the camera and the LIN in the event of a concern.