BCM (Body Control Module)
WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
Reads the air pressure signal received by the remote keyless entry receiver, and controls the warning lamp and the buzzer operations as shown below. It also has a judgement function to detect a system malfunction.
Courtesy of NISSAN MOTOR CO., U.S.A.