Component Parts: HPCM
WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
HPCM controls the vehicle.
When ignition switch is turned ON, BCM starts communication with HPCM and performs the ID verification between BCM and HPCM.
If the verification result is OK, the vehicle can be set to READY. If the verification result is NG, the vehicle can not be set to READY.