Nissan Qashqai (2007-2010). Manual — part 1481

BCS-14

< FUNCTION DIAGNOSIS >

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM

System Diagram

INFOID:0000000000924598

System Description

INFOID:0000000000924599

OUTLINE

• BCM incorporates a power consumption 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, combination meter and Intelligent Key unit) 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 each switches changes from 10 ms interval to 20 ms interval.

Sleep mode activation

• BCM receives the sleep-ready signal (ready) from IPDM E/R, combination meter and Intelligent Key unit via

CAN communication.

• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are ful-

filled.

• Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN com-

munication sleep mode.

• BCM is in the low power consumption mode and perform the low power consumption control when all of the

BCM sleep conditions are fulfilled with CAN sleep condition.

JPMIA0125GB

BCS

POWER CONSUMPTION CONTROL SYSTEM

BCS-15

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

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 trans-

mits wake up signals to BCM with CAN communication to convey the start of CAN communication.

Wake-up condition

Component Parts Location

INFOID:0000000000924600

CAN sleep condition

BCM sleep condition

• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm: Not operation
• Warning lamp: Not operation
• Warning chime: Not operation
• Stop lamp switch: OFF
• Key switch status: No change for 2seconds
• Hazard warning lamp: Not operation
• Exterior lamp: OFF
• Door lock status: No change for 2seconds
• CONSULT-III communication status: Not communication
• Door switch status: No change for 2seconds

The controls only BCM are completed.
(Interior room lamp battery saver: Time out etc.)

BCM wake-up condition

• Ignition switch: OFF

→

ACC or ON

• Stop lamp switch: ON (Depress brake pedal)
• Any door switch: OFF

→

ON

• Lighting switch: OFF

→

1ST or PASS

• Hazard switch: OFF

→

ON

• Back door opener switch OFF

→

ON

• Remote keyless entry receiver: Receiving

BCS-16

< FUNCTION DIAGNOSIS >

POWER CONSUMPTION CONTROL SYSTEM

1.

Combination meter

2.

BCM

3.

IPDM E/R

4.

Intelligent Key unit

A.

Over the glove box

B.

Engine room (left side)

C.

Over the instrument lower panel
(driver side)

JPMIA0239ZZ

BCS

DIAGNOSIS SYSTEM (BCM)

BCS-17

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

INFOID:0000000000924601

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

BCM

BCM : CONSULT-III Function (BCM - BCM)

INFOID:0000000000924608

WORK SUPPORT

Diagnosis mode

Function Description

WORK SUPPORT

Changes the setting for each system function.

SELF-DIAG RESULTS

Displays the diagnosis results judged by BCM. Refer to

BCS-61, "DTC Index"

.

CAN DIAG SUPPORT MNTR

Monitors the reception status of CAN communication viewed from BCM.

DATA MONITOR

The BCM input/output signals are displayed.

ACTIVE TEST

The signals used to activate each device are forcibly supplied from BCM.

ECU IDENTIFICATION

The BCM part number is displayed.

CONFIGURATION

• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

WORK SUPPORT

DATA MONITOR

ACTIVE TEST

—

BCM

×

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

Air conditioner

AIR CONDITONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

Immobilizer

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Trunk open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

PTC heater system

PTC HEATER

×

×