2009 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2009 Factory Service Manual
BCS
INSPECTION AND ADJUSTMENTBCS-3
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BASIC INSPECTION
INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN
REPLACING CONTROL UNIT
ADDITIONAL SERVI

BCS
INSPECTION AND ADJUSTMENTBCS-3
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BASIC INSPECTION
INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN
REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000003776373
When replacing BCM, save or print current vehicle specification with CONSULT-III configuration before
replacement.
Configuration has three functions as follows
• READ CONFIGURATION is the function to read (e xtract) vehicle configuration of current BCM.
WRITE CONFIGURATION - Manual sele ction is the function to select and write vehicle configuration on
BCM manually.
WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted
from current BCM.
CAUTION:
• When replacing BCM, you must perform WRITE CONFIGURATION with CONSULT-III.
Complete the procedure of WRITE CONFIGURATION in order.
If you set incorrect WRITE CONF IGURATION, incidents will occur.
Configuration is different for each vehicle model. Confirm conf iguration of each vehicle model.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000003776374
1. SAVING VEHICLE SPECIFICATION
Perform “READ CONFIGURATION” with CONSULT-III to save or print current vehicle specification.
>> GO TO 2
2. REPLACE BCM
Replace BCM. Refer to BCS-56, "Removal and Installation"
.
>> GO TO 3
3. WRITING VEHICLE SPECIFICATION
Perform “WRITE CONFIGURATION - Config file” or “WRITE CONFIGURATION - Manual selection” with
CONSULT-III to write vehicl e specification. Refer to BCS-4, "CONFIGURATION : Special Repair Require-
ment".
>> GO TO 4
4. INITIALIZE BCM (NATS)
Perform BCM initialization. (NATS)
>> WORK END
CONFIGURATION
CONFIGURATION : DescriptionINFOID:0000000003776375
Vehicle specification needs to be written with CONSULT- III because it is not written after replacing BCM.
Configuration has three functions as follows
READ CONFIGURATION is the function to read (e xtract) vehicle configuration of current BCM.
WRITE CONFIGURATION - Manual sele ction is the function to select and write vehicle configuration on
BCM manually.
WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted
from current BCM.
CAUTION:
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
BCS-4
< BASIC INSPECTION >[BCM]
INSPECTION AND ADJUSTMENT
When replacing BCM, you must perform
WRITE CONFIGURATION with CONSULT-III.
Complete the procedure of WRITE CONFIGURATION in order.
If

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INFINITI QX56 2009 Factory Service Manual
BCS
BODY CONTROL SYSTEMBCS-5
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FUNCTION DIAGNOSIS
BODY CONTROL SYSTEM
System DescriptionINFOID:0000000003776377
OUTLINE
BCM (Body Control Mo

BCS
BODY CONTROL SYSTEMBCS-5
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FUNCTION DIAGNOSIS
BODY CONTROL SYSTEM
System DescriptionINFOID:0000000003776377
OUTLINE
BCM (Body Control Module) controls
the various electrical components. It inputs the information required to
the control from CAN communication and the si gnal 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 consump-
tion control function that reduces the power consumption 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 Refer to
Combination switch reading system BCS-7, "System Diagram"
Signal buffer systemBCS-12, "System Diagram"
Power consumption control systemBCS-13, "System Diagram"
Auto light systemEXL-11, "System Diagram"
Turn signal and hazard warning lamp systemEXL-15, "System Diagram"
Headlamp systemEXL-7, "System Diagram"
Front fog lamp systemEXL-14, "System Diagram"
Daytime running light systemEXL-9, "System Diagram"
Interior room lamp control systemINL-6, "System Diagram"
Step lamp systemINL-6, "System Diagram"
Interior room lamp battery saver systemINL-6, "System Diagram"
Front wiper and washer systemWW-4, "System Diagram"
Rear wiper and washer systemWW-8, "System Diagram"
Warning chime systemWCS-4, "WARNING CHIME SYSTEM : System Diagram"
Door lock systemDLK-14, "DOOR LOCK AND UNLOCK SWITCH : System Diagram"
(NATS) Nissan anti-theft system SEC-11, "System Diagram"
Vehicle security systemSEC-15, "System Diagram"
Rear window defogger systemDEF-4, "System Diagram"
Intelligent Key systemSEC-7, "System Diagram"
Power window systemPWC-5, "System Diagram"
RAP (retained accessory power) systemBCS-26, "RETAINED PWR : CONSULT-
III Function (BCM - RETAINED PWR)"
TPMS (tire pressure monitoring system) BCS-28, "AIR PRESSURE MONITOR : CONSULT-III Function"
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
BCS-6
< FUNCTION DIAGNOSIS >[BCM]
BODY CONTROL SYSTEM
Component Parts Location
INFOID:0000000003776378
BCM M18, M19, M20 (view wit h instrument panel removed)
LEIA0068E
Revision: December 20092009

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INFINITI QX56 2009 Factory Service Manual
BCS
COMBINATION SWITCH READING SYSTEMBCS-7
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COMBINATION SWITCH READING SYSTEM
System DiagramINFOID:0000000003776379
System DescriptionINFOID:

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INFINITI QX56 2009 Factory Service Manual
BCS-8
< FUNCTION DIAGNOSIS >[BCM]
COMBINATION SWITCH READING SYSTEM
Combination switch circuit
Combination switch INPUT-OUTPUT system list
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH

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INFINITI QX56 2009 Factory Service Manual
BCS
COMBINATION SWITCH READING SYSTEMBCS-9
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- The voltage waveform of INPUT corresponding to the
formed circuit changes according to the ope

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INFINITI QX56 2009 Factory Service Manual
BCS-10
< FUNCTION DIAGNOSIS >[BCM]
COMBINATION SWITCH READING SYSTEM
The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the
TURN RH switch and FR WIPER LOW s

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