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Home >> Infiniti >> 1998 >> I30 Base, RE4F04A >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Multiplex Control System >> Self-Diagnostic System >> Mode II (Switch Signal Monitor)

Mode II (Switch Signal Monitor)

NOTE: This procedure is used to test switch signal inputs to BCM and LCUs without using Nissan CONSULT scan tool.
  1. In this mode, BCM and LCUs monitor respective switches in LAN system for input signals. Switch input signals are monitored in the following order.

    Body Control Module (BCM)

    • Hood Switch
    • Trunk Compartment Light Switch
    • Trunk Lid Unlock Switch
    • Door Switches (All)
    • Headlight Switch (First Detent)
    • Wiper Switch (INT Function)
    • Wiper Switch (WASH Function)
    • Seat Belt Switch

    LCU 01 (Driver's Door Control Unit)

    • Driver Power Window Lock Switch
    • Power Window Main Switches (UP/DOWN)
    • Power Window Automatic Switch
    • Door Lock/Unlock Switch (LOCK/UNLOCK)
    • Door Key Cylinder Switch (LOCK/UNLOCK)
    • Door Unlock Sensor

    LCU 02 (Passenger's Door Control Unit)

    • Door Key Cylinder Switch (LOCK/UNLOCK)
    • Door Unlock Sensor
    • Passenger Power Window Sub-Switch (UP/DOWN)

    LCU 03 (Right Rear Door Control Unit)

    • Right Rear Power Window Sub-Switch (UP/DOWN)
    • Door Unlock Sensor

    LCU 04 (Left Rear Door Control Unit)

    • Left Rear Power Window Sub-Switch (UP/DOWN)
    • Door Unlock Sensor

    LCU 05 (Multi-Remote Control Unit). Buttons are operated by multi-remote controller.

    • Door Lock Button
    • Door Unlock Button
    • Panic Alarm Button
    • Trunk Lid Opener Button
  2. To enter on-board diagnostic Mode II, turn ignition switch to LOCK position. Turn headlight switch and rear window defogger switch to OFF position. Ensure all doors are closed. Set interior light switch in center "O" position.
  3. Turn ignition to RUN position, then LOCK position. Repeatedly press rear window defogger switch to ON position more than 10 times in 10 seconds, ending in the ON position. Dome and step lights should illuminate. Turn ignition switch to RUN position within 5 seconds after dome and step lights illuminate.
  4. Dome and step lights should turn off, and within one second, system should enter on-board diagnostic Mode II. Operate the switches listed above. Dome and step lights will illuminate and buzzer will sound each time input signal from a switch is detected. See Fig 1 . To exit diagnostic mode, turn ignition switch to LOCK position.
    Fig 1: Switch Input Signal Patterns
    G96I06341Courtesy of NISSAN MOTOR CO., U.S.A.