Description & Operation: Notes

NOTE: The multiplex control system may also be referred as Local Area Network (LAN) system or 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: Identifying Body Control Module (BCM) & Local Control Unit (LCU) Locations

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