Nissan Sentra B18 (2020-2025) Service Manual: Power Consumption Control System

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Body Control System :: System Description / System / Power Consumption Control System

System Description

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

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

Component parts	Signal description
IPDM E/R	Each unit transmits the sleep-ready signal (ready) to the BCM when all of the CAN sleep conditions are fulfilled. Each unit transmits the wake up signal to the BCM when all of the CAN sleep conditions are fulfilled. Each unit receives the sleep wake up signal (sleep) from the BCM via CAN communication. Each unit receives the sleep wake up signal (wake up) from the BCM via CAN communication.
Combination meter
Intelligent Key unit
AV control unit
8CH CAN gateway
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.

System Description

OUTLINE

The BCM incorporates a power saving control function that reduces power consumption according to the Nissan Sentra vehicle status.
The 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 the 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

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

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

Sleep mode activation

The BCM receives the sleep-ready signal (ready) from the IPDM E/R and combination meter via CAN communication.
The 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.
The BCM is in low power consumption mode and performs 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 Sentra 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 Push-button ignition switch illumination: OFF NATS: No operation TPMS: Stop

Wake-up operation

The 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 the BCM via CAN communication to report the CAN communication start.

BCM wake-up condition	CAN wake-up condition
Front door lock assembly LH: Lock or unlock Door lock switch: OFF→ON Door unlock switch: OFF→ON Trunk lid opener switch: OFF→ON Intelligent Key unit: Receiving valid keyfob	Receiving the sleep-ready signal (not-ready) from any units 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 Trunk lid opener assembly (ajar switch): OFF→ON, ON→OFF Front door request switch LH: OFF→ON Front door request switch RH: OFF→ON Stop lamp switch signal: ON Intelligent Key unit: Receiving valid keyfob

BCM wake-up condition

CAN wake-up condition

Front door lock assembly LH: Lock or unlock
Door lock switch: OFF→ON
Door unlock switch: OFF→ON
Trunk lid opener switch: OFF→ON
Intelligent Key unit: Receiving valid keyfob

Receiving the sleep-ready signal (not-ready) from any units
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
Trunk lid opener assembly (ajar switch): OFF→ON, ON→OFF
Front door request switch LH: OFF→ON
Front door request switch RH: OFF→ON
Stop lamp switch signal: ON
Intelligent Key unit: Receiving valid keyfob

Signal Buffer System

System Description System Description SYSTEM DIAGRAM OUTLINE The BCM has the signal transmission function that outputs/transmits each input/received signal to each unit. Signal trans ...

Shipping Mode Control System

System Description System Description SYSTEM DIAGRAM OUTLINE The BCM has the shipping mode control system function that reduces the drain on the battery during extended storage. ...

Other materials:

Locking with power door lock switch
Door lock switch To lock all the doors without a key, push the door lock switch (driver’s or front passenger’s side) to the lock position 1 . When locking the door this way, be certain not to leave the key inside the vehicle. To unlock all the doors without a key, push the door lock ...

P0365 Exhaust Valve Timing Control Position Sensor
Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition ...

Work Flow
Work Flow CUSTOMER INTERVIEW Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diagnostic Worksheet during the interview to document the facts and conditions when the noise occurs and any customer's comments; refer to Diagnos ...