Description & Operation: Notes

NOTE: The multiplex control system may also be referred to as In-Vehicle Multiplexing System (IVMS).

The multiplex control system uses a Body Control Module (BCM) and 5 Local Control Units (LCUs) to manage the following electrical systems: power window control, power door lock control, automatic drive positioner control, power seat control, time control system, anti-theft system, step light control, illumination control, interior light and ignition key hole illumination and multi-remote control. See Fig 1 . Some electrical systems are directly connected to the BCM, while some switches and electrical loads and switches are connected to the appropriate LCU.

The BCM uses 2 data lines, connected between BCM and LCUs, to establish communication and control with each LCU. System has a sleep/wake-up control mode to turn on/shut off the communication between BCM and LCUs, as necessary, to prevent unnecessary power consumption.

Fig 1: Body Control Module (BCM) & Local Control Unit (LCU) Locations

Courtesy of NISSAN MOTOR CO., U.S.A.