Component Parts: BCM
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
The BCM reads the air pressure signal received by the remote keyless entry receiver. In addition, the BCM also uses the outside key antennas (driver side, passenger side and rear bumper) to identify the location of the transmitters.
The BCM has a self-diagnosis function used to detect system malfunctions.