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 Sedan Service Manual

Electrical & power control » Body control system (BCS) » System
Power consumption control system

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

POWER CONSUMPTION CONTROL SYSTEM : System Description

OUTLINE

• BCM incorporates a power saving control function that reduces the power consumption according to the 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 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

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

• The reading interval of the switches changes from 10 ms interval to 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 wake up 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                                   

Wake-up operation

• BCM transmits sleep wake up signal (wake up) to each unit when any condition listed below is established, and then goes into normal mode from low power consumption mode.
• Each unit starts transmissions with CAN communication by receiving sleep wake up signals. Each unit transmits wake up signals to BCM with CAN communication to convey the start of CAN communication.

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

DOOR LOCK

DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)

DATA MONITOR                   

ACTIVE TEST                               

WORK SUPPORT                       

* : Initial setting

REAR DEFOGGER

REAR DEFOGGER : CONSULT Function (BCM - REAR DEFOGGER)

DATA MONITOR                                   

ACTIVE TEST                   

BUZZER

BUZZER : CONSULT Function (BCM - BUZZER)

DATA MONITOR                   

ACTIVE TEST                           

INT LAMP

INT LAMP : CONSULT Function (BCM - INT LAMP)

DATA MONITOR                           

ACTIVE TEST               

WORK SUPPORT               

* : Initial setting

MULTI REMOTE ENT

MULTI REMOTE ENT : CONSULT Function (BCM - MULTI REMOTE ENT)

DATA MONITOR                   

ACTIVE TEST               

WORK SUPPORT               

*: Initial setting

HEADLAMP

HEADLAMP : CONSULT Function (BCM - HEAD LAMP)

DATA MONITOR           

ACTIVE TEST               

WORK SUPPORT           

* : Initial setting

WIPER

WIPER : CONSULT Function (BCM - WIPER)

DATA MONITOR                   

ACTIVE TEST                   

WORK SUPPORT                   

* : Initial setting

FLASHER

FLASHER : CONSULT Function (BCM - FLASHER)

DATA MONITOR               

ACTIVE TEST               

AIR CONDITIONER

AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER)

DATA MONITOR                       

COMB SW

COMB SW : CONSULT Function (BCM - COMB SW)

DATA MONITOR               

BCM

BCM : CONSULT Function (BCM - BCM)

ECU IDENTIFICATION

The BCM part number is displayed.

SELF DIAGNOSTIC RESULT

Refer to BCS "DTC Index".

WORK SUPPORT                       

CONFIGURATION

Refer to BCS "CONFIGURATION (BCM) : Description".

CAN DIAG SUPPORT MNTR

Refer to LAN "CAN Diagnostic Support Monitor".

IMMU

IMMU : CONSULT Function (BCM - IMMU)

SELF DIAGNOSTIC RESULT

Refer to BCS "DTC Index".

ACTIVE TEST                               

WORK SUPPORT                           

BATTERY SAVER

BATTERY SAVER : CONSULT Function (BCM - BATTERY SAVER)

DATA MONITOR               

ACTIVE TEST               

WORK SUPPORT               

* : Initial setting

TRUNK

TRUNK : CONSULT Function (BCM - TRUNK)

DATA MONITOR               

THEFT ALM

THEFT ALM : CONSULT Function (BCM - THEFT)

DATA MONITOR               

ACTIVE TEST               

WORK SUPPORT               

*: Initial setting

SIGNAL BUFFER

SIGNAL BUFFER : CONSULT Function (BCM - SIGNAL BUFFER)

DATA MONITOR               

ACTIVE TEST               

AIR PRESSURE MONITOR

AIR PRESSURE MONITOR : CONSULT Function (BCM - AIR PRESSURE MONITOR)

NOTE: The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS transmitter IDs
• Display tire pressure reported by the TPMS transmitter
• Read TPMS DTCs
• Register TPMS transmitter IDs
• Test remote keyless entry keyfob relative signal strength

SELF DIAGNOSTIC RESULT

NOTE: Before performing self diagnostic result, be sure to register the ID, or else the actual malfunction may be different from that displayed on CONSULT.

Refer to BCS "DTC Index".                       

DATA MONITOR                   

ACTIVE TEST                   

PANIC ALARM

PANIC ALARM : CONSULT Function (BCM - PANIC ALARM)

ACTIVE TEST                               

ECU DIAGNOSIS INFORMATION

Body control system

Combination switch reading system

Power consumption control system