Nissan Murano: System / Power Consumption Control System

Nissan Murano (Z52) 2015-2024 Service Manual / Electrical & Power Control / Body Control System :: Bcm / System Description / System / Power Consumption Control System

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table:

Component parts	Signal description
IPDM E/R	Each unit transmits the sleep-ready signal (ready) to BCM when all of the CAN sleep conditions are fulfilled. Each unit transmits the wake-up signal to BCM when all of the CAN sleep conditions are fulfilled. Each unit receives the sleep wake up signal (sleep) from BCM via CAN communication. Each unit receives the sleep wake up signal (wake-up) from BCM via CAN communication.
Combination meter
BCM	BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are fulfilled. BCM transmits the sleep wake up signal (wake-up) to each unit when all of the CAN sleep conditions are fulfilled. BCM receives the sleep-ready signal (ready) from each unit via CAN communication. BCM receives the wake-up signal from each unit via CAN communication.

OUTLINE

BCM incorporates a power saving control function that reduces the power consumption according to the Nissan Murano vehicle status.
BCM switches the status (control mode) by itself with the power saving control function. It performs the sleep request to each unit (IPDM E/R and combination meter) that operates with ignition switch OFF.

Normal mode (wake-up)
- CAN communication is normally performed with other units
- Each control with BCM is operating properly
CAN communication sleep mode (CAN sleep)
- CAN transmission is stopped
- Control with BCM only is operating
Low power consumption mode (BCM sleep)
- Low power consumption control is active
- CAN transmission is stopped

LOW POWER CONSUMPTION CONTROL WITH BCM

BCM reduces the power consumption with the following operation in the low power consumption mode:

The reading interval of each switch changes from a 10 ms interval to a 60 ms interval.

Sleep mode activation

BCM receives the sleep-ready signal (ready) from IPDM E/R and combination meter via CAN communication.
BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are fulfilled.
Each unit stops the transmission of CAN communication with the sleep wakeup signal. BCM is in CAN communication sleep mode.
BCM is in the low power consumption mode and performs the low power consumption control when all of the BCM sleep conditions are fulfilled with CAN sleep condition.

Sleep condition
CAN sleep condition	BCM sleep condition
Receiving the sleep-ready signal (ready) from all units Ignition switch: OFF Nissan Murano Vehicle security system alarm and panic alarm: No operation Warning lamp: No operation Intelligent Key warning buzzer: No operation Stop lamp switch: OFF Turn signal indicator lamp: No operation Exterior lamp: OFF Door lock status: No change CONSULT communication status: No communication Meter display signal: Non-transmission Door switch status: No change Rear window defogger: OFF	Interior room lamp battery saver: Time out RAP system: OFF Power window switch LIN communication: No transmission Push-button ignition switch illumination: OFF NATS: No operation Remote keyless entry receiver communication status: No communication TPMS system: Stop

Wake-up operation

BCM transmits the sleep wake up signal (wake up) to each unit when any of the CAN wake-up conditions are fulfilled. It changes from the low power consumption mode or the CAN communication sleep mode to the normal mode.
Each unit starts the transmission of CAN communication with the sleep wake up signal. In addition, the combination meter transmits the wake up signal to BCM via CAN communication to report the CAN communication start.

BCM wake-up condition	CAN wake-up condition
Door unlock sensor: OFF→ON, ON→OFF Front door lock assembly LH: Lock or unlock Door lock switch: OFF→ON Door unlock switch: OFF→ON Back door opener switch: OFF→ON Power window LIN communication: Receiving Remote keyless entry receiver: Receiving valid keyfob	Receiving the sleep-ready signal (Not-ready) from any units Push-button ignition switch: OFF→ON Hazard switch: OFF→ON PASSING switch: OFF→ON, ON→OFF TAIL LAMP switch: OFF→ON Front door switch LH: OFF→ON, ON→OFF Front door switch RH: OFF → ON, ON → OFF Back door opener switch: OFF→ON, ON→OFF Front outside handle assembly LH (request switch): OFF→ON Front outside handle assembly RH (request switch): OFF→ON Back door request switch: OFF→ON Stop lamp switch signal: ON Remote keyless entry receiver: Receiving valid keyfob

BCM wake-up condition

CAN wake-up condition

Door unlock sensor: OFF→ON, ON→OFF
Front door lock assembly LH: Lock or unlock
Door lock switch: OFF→ON
Door unlock switch: OFF→ON
Back door opener switch: OFF→ON
Power window LIN communication: Receiving
Remote keyless entry receiver: Receiving valid keyfob

Receiving the sleep-ready signal (Not-ready) from any units
Push-button ignition switch: OFF→ON
Hazard switch: OFF→ON
PASSING switch: OFF→ON, ON→OFF
TAIL LAMP switch: OFF→ON
Front door switch LH: OFF→ON, ON→OFF
Front door switch RH: OFF → ON, ON → OFF
Back door opener switch: OFF→ON, ON→OFF
Front outside handle assembly LH (request switch): OFF→ON
Front outside handle assembly RH (request switch): OFF→ON
Back door request switch: OFF→ON
Stop lamp switch signal: ON
Remote keyless entry receiver: Receiving valid keyfob

Signal Buffer System

System Description SYSTEM DIAGRAMOUTLINEBCM has the signal transmission function that outputs/transmits each input/received signal to each unit.Signal transmission function list Signal name Input Output Description Push-button ignition switch signal Push-button ignition switch BCM Transmits the push-button ignition switch signal to the BCM...

Shipping Mode Control System

System Description SYSTEM DIAGRAMSignal transmission function list Signal name Input Output Description Shipping mode status signal BCM Combination meter (CAN) Transmits shipping mode status signal to combination meter when condition is established...

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