2011 INFINITI QX56 Factory Service Manual

CD changer wiring display check oil cooling ground clearance

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INFINITI QX56 2011 Factory Service Manual
BCS
COMPONENT PARTSBCS-5
< SYSTEM DESCRIPTION >
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4. Combination meter 5. Driver seat control unit
Refer to ADP-6, "
Component Parts
Location". 6. Pre-crash seat belt cont

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INFINITI QX56 2011 Factory Service Manual
BCS-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
BODY CONTROL SYSTEM
BODY CONTROL SYSTEM : System DescriptionINFOID:0000000006274789
OUTLINE
BCM (Body Control Module) controls the various electrical comp

BCS-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
BODY CONTROL SYSTEM
BODY CONTROL SYSTEM : System DescriptionINFOID:0000000006274789
OUTLINE
BCM (Body Control Module) controls the various electrical components. It inputs the information required to
the control from CAN communication and the signal received from each switch and sensor.
BCM has combination switch reading function for reading the operation status of combination switches (light,
turn signal, wiper and washer) in addition to a function fo r controlling the operation of various electrical com-
ponents. It also has the signal transmission function as the passed point of signal and the power saving con-
trol function that reduces the power c onsumption with the ignition switch OFF.
BCM is equipped with the diagnosis function that perfo rms the diagnosis with CONSULT-III and various set-
tings.
BCM CONTROL FUNCTION LIST
System Reference
Combination switch reading system BCS-7, "
COMBINATION SWITCH READING SYSTEM : System
Diagram"
Signal buffer system
BCS-10, "SIGNAL BUFFER SYSTEM : System Diagram"
Power consumption control systemBCS-11, "POWER CONSUMPTION CONTROL SYSTEM : Sys-
tem Diagram"
Auto light system
EXL-11, "AUTO LIGHT SYSTEM : System Diagram"
Turn signal and hazard warning lamp systemEXL-18, "TURN SIGNAL AND HAZARD WARNING LAMP SYS-
TEM : System Diagram"
Headlamp system
EXL-10, "HEADLAMP SYSTEM : System Diagram"
Daytime running light systemEXL-14, "DAYTIME RUNNING LIGHT SYSTEM : System Dia-
gram"
Parking, license plate, side maker and tail lamps system
EXL-18, "PARKING, LICENSE PLATE, SIDE MARKER AND
TAIL LAMP SYSTEM : System Diagram"
Front fog lamp system
EXL-20, "FRONT FOG LAMP SYSTEM : System Diagram"
Exterior lamp battery saver systemEXL-20, "EXTERIOR LAMP BATTERY SAVER SYSTEM : Sys-
tem Diagram"
Interior room la
mp control system INL-6, "INTERIOR ROOM LAMP CONTROL SYSTEM : System
Diagram"
Interior room lamp battery saver system
INL-9, "INTERIOR ROOM LAMP BATTERY SAVER SYSTEM :
System Diagram"
Front wiper and washer systemWW-7, "FRONT WIPER AND WASHER SYSTEM : System Dia-
gram"
Rear wiper and washer systemWW-10, "REAR WIPER AND WASHER SYSTEM : System Dia-
gram"
Headlamp washer system
WW-13, "HEADLAMP WASHER SYSTEM : System Diagram"
Warning chime systemWCS-6, "WARNING CHIME SYSTEM : System Diagram"
Power door lock systemDLK-16, "System Diagram"
Infiniti Vehicle immobilizer System (IVIS)SEC-15, "INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS :
System Diagram"
Vehicle security systemTheft warning alarm
SEC-17, "VEHICLE SECURITY SYSTEM : System Diagram"Panic alarm
Rear window defogger system DEF-6, "
System Diagram"
Intelligent Key system/engine start systemDLK-18, "INTELLIGENT KEY SYSTEM : System Diagram"
Power window system PWC-8, "SystemDiagram"
Retained accessory power (RAP) systemPWC-8, "System Description"
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
BCS
SYSTEMBCS-7
< SYSTEM DESCRIPTION >
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COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING SYSTEM : System DiagramINFOID:0000000006274790
NOTE:
*: TAIL LAMP swit

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INFINITI QX56 2011 Factory Service Manual
BCS-8
< SYSTEM DESCRIPTION >
SYSTEM
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH READING FUNCTION
Description
BCM reads the status of the combination switch at 10 ms interval normall

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INFINITI QX56 2011 Factory Service Manual
BCS
SYSTEMBCS-9
< SYSTEM DESCRIPTION >
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The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP switch is turned ON.
BCM detects the combination switch s

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INFINITI QX56 2011 Factory Service Manual
BCS-10
< SYSTEM DESCRIPTION >
SYSTEM
NOTE:
For details of wiper volume dial position, refer to WW-7, "
FRONT WIPER AND WASHER SYSTEM : System Description".
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM :

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INFINITI QX56 2011 Factory Service Manual
BCS
SYSTEMBCS-11
< SYSTEM DESCRIPTION >
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POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTRO
L SYSTEM : System DiagramINFOID:0000000006274794
POWER CONSUMPTION CONTR

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INFINITI QX56 2011 Factory Service Manual
BCS-12
< SYSTEM DESCRIPTION >
SYSTEM
Low power consumption mode (BCM sleep)- Low power consumption control is active
- CAN transmission is stopped
LOW POWER CONSUMPTION CONTROL WITH BCM
BCM reduces t

BCS-12
< SYSTEM DESCRIPTION >
SYSTEM
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 60 ms interval.
Sleep mode activation
BCM receives the sleep-ready signal (ready) from IPDM E/R, combination meter and automatic back door
control module 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
Wake-up operation
BCM transmits sleep wake up signal (wake up) to eac h 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-III communication status: Not communication
Meter display signal: Non-transmission
Door switch status: No change
Rear window defogger: OFF
Driver door lock status: No change Interior room lamp battery saver: Time out
RAP system: OFF
IVIS: 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
Revision: 2010 May2011 QX56

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