Nissan Maxima Service and Repair Manual: Body control system

System Description

OUTLINE

  • ECU DIAGNOSIS INFORMATION controls the various electrical components. It inputs the information required to the control from CAN communication and the signal received from each switch and sensor.
  • BCM has combination switch reading function for reading the operation status of combination switches (light, turn signal, wiper and washer) in addition to a function for controlling the operation of various electrical components.

    It also has the signal transmission function as the passed point of signal and the power saving control function that reduces the power consumption with the ignition switch OFF.

  • BCM is equipped with the diagnosis function that performs the diagnosis with CONSULT and various settings.

CAN communication control

In CAN communication, control units are connected with 2 communication lines (CAN-L, CAN-H) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives the data but selectively reads required information only.

CAN communication signal

BCM control function list

Nissan Maxima. BCM control function list

Nissan Maxima. BCM control function list

Component Parts Location

Nissan Maxima. Component Parts Location

  1. BCM M16, M17, M18, M19, M20, M21 (view with instrument panel removed)
    System description
    ...

    Combination switch reading system
    System Diagram System Description OUTLINE BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the status of each switch. BCM has a co ...

    Other materials:

    P1574 ASCD vehicle speed sensor
    Description The ECM receives two vehicle speed signals via the CAN communication line. One is sent from combination meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control. Refer to EC-68, "System Diagram" for ASCD functions. D ...

    Diagnosis system (bluetooth control unit)
    Diagnosis Description The Bluetooth control unit has two diagnostic checks. The first diagnostic check is performed automatically every ignition cycle during control unit initialization. The second diagnostic check is performed by the technician using the steering wheel audio control switches ...

    Basic inspection
    DIAGNOSIS AND REPAIR WORKFLOW Work Flow DETAILED FLOW 1.COLLECT THE INFORMATION FROM THE CUSTOMER It is also important to clarify customer complaints before inspection. First of all, reproduce symptoms, andunderstand them fully. Ask customer about his/her complaints carefully. In some cases, ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

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