Nissan Altima 2007-2012 Service Manual: Body control system

System Description

OUTLINE

• BCM (body control module) 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-III 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

Refer to the LAN-25, "CAN Communication Signal Chart".

BCM control function list

Component Parts Location

1. BCM M16, M17, M18, M19, M20, M21 (view with instrument panel removed) (coupe shown, sedan similar)

    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 is a c ...

    Other materials:

    Speedometer
    System Diagram System Description The ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN communication lines. Component Parts Location 1. Combination meter M24 2. IPDM E/R E17, E18, E201, F10 3. ECM E10 4. TCM F16 5. BCM ...

    Air conditioner system refrigerant and oil recommendations
    The air conditioner system in your NISSAN vehicle must be charged with the refrigerant HFC-134a (R-134a) and NISSAN A/C system oil Type S or the exact equivalents. CAUTION The use of any other refrigerant or oil will cause severe damage to the air conditioning system and will require the repl ...

    On-vehicle maintenance
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