Nissan Quest E52. Manual - part 192

BCS

SYSTEM

BCS-11

< SYSTEM DESCRIPTION >

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• The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the

TURN RH switch and TAIL LAMP switch are turned ON.

• BCM detects the combination switch status signal “5AD” when the signals of OUTPUT 1 and OUTPUT 4 are

input to INPUT 5.

• BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal “5AD” is detected.

WIPER INTERMITTENT DIAL POSITION

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2 and 3 switches.

NOTE:

For details of wiper intermittent dial position, refer to 

WW-8, "FRONT WIPER AND WASHER SYSTEM : System Description"

.

SIGNAL BUFFER SYSTEM

JPMIA1546GB

Wiper intermittent

dial position

Switch status

INT VOLUME 1

INT VOLUME 2

INT VOLUME 3

1

ON

ON

ON

2

ON

ON

OFF

3

ON

OFF

OFF

4

OFF

OFF

OFF

5

OFF

OFF

ON

6

OFF

ON

ON

7

OFF

ON

OFF

BCS-12

< SYSTEM DESCRIPTION >

SYSTEM

SIGNAL BUFFER SYSTEM : System Description

INFOID:0000000009651686

SYSTEM DIAGRAM

OUTLINE

BCM has the signal transmission function that outputs/transmits each input/received signal to each unit.

Signal transmission function list

JMMIA0858GB

Signal name

Input

Output

Description

• Ignition switch ON signal
• ACC signal

Push-button ignition switch 
(Push switch)

• IPDM E/R (CAN)
• Driver seat control unit (CAN)
• Sliding door control unit LH 

(CAN)

• Sliding door control unit RH 

(CAN)

Inputs the push-button ignition 
switch (push switch) signal and 
transmits the ignition switch sta-
tus judged with BCM via CAN 
communication.

Door switch signal

Any door switch

• Combination meter (CAN)
• IPDM E/R (CAN)
• Driver seat control unit (CAN)

Inputs the door switch signal 
and transmits it via CAN com-
munication.

Oil pressure switch signal

IPDM E/R (CAN)

Combination meter (CAN)

Transmits the received oil pres-
sure switch signal via CAN 
communication.

Blower fan ON signal

• A/C auto amp. (Auto A/C)
• A/C amp. (Manual A/C)

ECM (CAN)

Input blower fan ON signal, and 
transmits it via CAN communi-
cation.

A/C ON signal

• A/C auto amp. (Auto A/C)
• A/C amp. (Manual A/C)

ECM (CAN)

Input A/C ON signal, and trans-
mits it via CAN communication.

BCS

SYSTEM

BCS-13

< SYSTEM DESCRIPTION >

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POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM : System Description

INFOID:0000000009651687

SYSTEM DIAGRAM

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, combination meter, driver seat control unit, automatic back door control
module, sliding door control unit LH and sliding door control unit RH) 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

Stop lamp switch signal

Stop lamp relay

TCM (CAN)

Inputs the stop lamp switch 1 
signal and stop lamp switch 2 
signal, and transmits it via CAN 
communication.

Interlock/PNP switch signal

TCM

IPDM E/R (CAN)

Inputs the P/N position signal 
and transmits Interlock/PNP 
switch signal via CAN commu-
nication.

Signal name

Input

Output

Description

JMMIA0859GB

BCS-14

< SYSTEM DESCRIPTION >

SYSTEM

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 60 ms interval.

Sleep mode activation

• BCM receives the sleep-ready signal (ready) from IPDM E/R, combination meter, automatic back door con-

trol module, sliding door control unit LH and sliding door control unit RH 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.

Sleep condition

NOTE:

*: Refer to 

INL-11, "INTERIOR ROOM LAMP BATTERY SAVER SYSTEM : System Description"

 for details of the interior room lamp bat-

tery saver time.

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-

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

CAN sleep condition

BCM sleep condition

• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system: Not operation
• Warning chime: Not operation
• Intelligent Key system buzzer: Not operation
• Stop lamp switch: OFF
• Turn signal indicator lamp: Not operation
• Exterior  lamp:  OFF
• Door lock status: No change
• CONSULT communication status: Not 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
• NVIS: Not operation
• Remote keyless entry receiver communication status: No com-

munication

• LOCK indicator lamp: Not operation
• ACC indicator lamp: Not operation
• ON indicator lamp: Not operation