Door Warning Lamp
WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Door warning lamp is controlled by the BCM.
When one of the doors is opened, ground is supplied to the BCM terminals 10, 11, 14 or 54. The BCM then signals the combination meter (unified meter control unit) via the CAN lines and ground is provided to the door warning lamp.
When power and ground are supplied, the door warning lamp illuminates.