IPDM E/R
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.
IPDM E/R has steering lock relay (Models with steering lock unit) and headlamp relays inside. Steering lock relay is used for the steering lock/unlock function. Headlamp relays are used for the vehicle security function. IPDM E/R controls these relays while communicating with BCM.