Infiniti M35/M45 Y50. Manual - part 230

BCM (BODY CONTROL MODULE)

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BCS

Operation Mode

Combination switch reading function has operation modes shown below.

1.

Normal status

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When BCM is not in sleep status, OUTPUT terminals (1-5) send out ON signal every 10 ms.

2.

Sleep status

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When BCM is in sleep status, transistors of OUTPUT 1 stop the output, and BCM enters low power
mode. Mean while OUTPUT 2-5 send out ON signal every 60 ms, and accept only input from lighting
switch (except turn signal switch) system.

CAN COMMUNICATION CONTROL

CAN communication allows a high rate of information transmission through the two communication lines (CAN
L line, CAN H line) connecting the various control units in the system. Each control unit transmits/receives
data but selectively reads required data only. For details of signals that are transmitted/received by BCM via
CAN communication, refer to 

LAN-50, "CAN System Specification Chart"

 .

PKIC0272E

BCS-6

BCM (BODY CONTROL MODULE)

BCM STATUS CONTROL

BCM changes its status depending on the operation status in order to save power consumption.

1.

CAN communication status

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With ignition switch ON, CAN communicates with other control units normally.

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Control by BCM is being operated properly.

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When ignition switch is OFF, switching to sleep mode is possible.

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Even when ignition switch is OFF, if CAN communication with IPDM E/R and combination meter is
active, CAN communication status is active.

2.

Sleep transient status

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This status shuts down CAN communication when ignition switch is turned OFF.

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It transmits sleep request signal to IPDM E/R and combination meter.

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Two seconds after CAN communication of all control units stops, sleep transient status is switches to
CAN communication inactive status.

3.

CAN communication inactive status

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With ignition switch OFF, CAN communication is not active.

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With ignition switch OFF, control performed only by BCM is active.

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Three seconds after CAN communication of all control units stops, CAN communication inactive status
is switches to sleep status.

4.

Sleep status

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BCM is activated with low power mode.

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CAN communication is not active.

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When CAN communication operation is detected, it switches to CAN communication status.

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When a state of the following switches changes, it switches to CAN communication status.

–

Key switch (ACC, ON)

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Key slot

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Intelligent Key (lock/unlock signal)

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Hazard switch

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Door lock/unlock switch

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Front door switch (driver side, passenger side)

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Rear door switch (LH, RH)

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Trunk lid opener switch

–

Combination switch (passing, lighting switch 1ST position, front fog lamp)

–

Key cylinder switch

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When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.

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Status of combination switch reading function is changed.

BCM (BODY CONTROL MODULE)

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SYSTEMS CONTROLLED BY BCM DIRECTLY

NOTE:
Power supply only. No system control.

SYSTEMS CONTROLLED BY BCM AND IPDM E/R

SYSTEMS CONTROLLED BY BCM AND COMBINATION METER

SYSTEMS CONTROLLED BY BCM AND INTELLIGENT KEY UNIT

SYSTEMS CONTROLLED BY BCM, COMBINATION METER AND IPDM E/R 

SYSTEMS CONTROLLED BY BCM, LOW TIRE PRESSURE WARNING CONTROL UNIT AND 
COMBINATION METER

System

Reference

Power door lock

BL-24, "POWER DOOR LOCK SYSTEM"

Power window 

NOTE

GW-14, "POWER WINDOW SYSTEM"

Sunroof 

NOTE

RF-10, "SUNROOF"

Automatic drive positioner 

NOTE

SE-11, "AUTOMATIC DRIVE POSITIONER"

Room lamp timer

LT-266, "INTERIOR ROOM LAMP"

System

Reference

Panic alarm

BL-217, "VEHICLE SECURITY (THEFT WARNING) SYSTEM"

Theft warning system

BL-217, "VEHICLE SECURITY (THEFT WARNING) SYSTEM"

IVIS (NATS)

BL-244, "IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)"

Headlamp

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LT-42, "HEADLAMP (FOR USA) - XENON TYPE -"

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LT-8, "HEADLAMP (FOR USA) - CONVENTIONAL TYPE -"

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LT-78, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -"

Auto light system

LT-115, "AUTO LIGHT SYSTEM"

Parking, license plate and tail lamps

LT-248, "PARKING, LICENSE PLATE AND TAIL LAMPS"

Front fog lamp

LT-194, "FRONT FOG LAMP"

Front wiper and washer system

WW-4, "FRONT WIPER AND WASHER SYSTEM"

Rear window defogger

GW-71, "REAR WINDOW DEFOGGER"

System

Reference

Turn signal and hazard warning lamps

LT-212, "TURN SIGNAL AND HAZARD WARNING LAMPS"

Warning chime

DI-59, "WARNING CHIME"

System

Reference

Intelligent Key

BL-43, "INTELLIGENT KEY SYSTEM"

System

Reference

Oil pressure warning lamp

DI-39, "WARNING LAMPS"

System

Reference

Low tire pressure warning lamp and buzzer

WT-9, "TIRE PRESSURE MONITORING SYSTEM"

BCS-8

BCM (BODY CONTROL MODULE)

MAJOR COMPONENTS AND CONTROL SYSTEM

System

Input

Output

Intelligent Key system

Intelligent Key unit

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All door locking actuator

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Trunk lid opener actuator

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Turn signal lamp (LH, RH)

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Combination meter

Power door lock system

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Power window main switch (door lock and unlock switch)

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Power window sub switch (passenger side) 
(door lock and unlock switch)

All-door locking actuator

Power supply (IGN) to power win-
dow, sunroof

Ignition power supply

Power window and sunroof system

Power supply (BAT) to power win-
dow, sunroof and power seat

Battery power supply

Power window, sunroof system 
and power seat

Panic alarm

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Key slot

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Intelligent Key

IPDM E/R

Theft warning system

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All-door switch

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Hood switch

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Intelligent Key

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Power window main switch (door lock and unlock switch)

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IPDM E/R

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Security indicator lamp

Auto light system

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Optical sensor

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Combination switch

IPDM E/R

Exterior lamp battery saver control

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Ignition switch

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Combination switch

IPDM E/R

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Headlamp

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Tail lamp

Combination switch

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IPDM E/R

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Combination meter

Front fog lamp

Combination switch

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IPDM E/R

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Combination meter

Turn signal lamp

Combination switch

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Turn signal lamp

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Combination meter

Hazard lamp

Hazard switch

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Turn signal lamp

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Combination meter

Interior room lamp timer

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Key switch

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Power window main switch (door lock and unlock switch)

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Front door switch driver side

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All-door switch

Interior room lamp

Key warning chime*

1

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Key switch

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Front door switch driver side

Combination meter 
(warning buzzer)

Light warning chime

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Combination switch

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Front door switch driver side

Combination meter
(warning buzzer)

Tire pressure monitoring system

Low tire pressure warning control unit

Combination meter
(warning buzzer)
(warning lamp)

Seat belt warning chime

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Combination meter [Seat belt buckle (driver side) switch]

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Ignition switch

Combination meter 
(warning buzzer)

Vehicle-speed-sensing intermittent 
wiper

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Combination switch

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Unified meter and A/C amp.

IPDM E/R

Rear window defogger

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Multifunction switch

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NAVI control unit*

2

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AV control unit*

3

IPDM E/R