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COMBINATION SWITCH READING SYSTEMBCS-11
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1. BCM M18, M19, M20 (view with in-
strument panel removed) 2. Combination switch (lighting and
turn signal switch) M28 3. Combination switch (wiper and
washer switch) M28
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BCS-12
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SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM
System DiagramINFOID:0000000003776382
System DescriptionINFOID:0000000003776383
OUTLINE
BCM has the signal transmission function that output
s/transmits each input/received signal to each unit.
Signal transmission function list
ALMIA0263GB
Signal name Input Output Description
Oil pressure switch signal IPDM E/R (CAN) Combination meter (CAN) Transmits the received oil pres-
sure switch signal via CAN
communication.
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BCS
POWER CONSUMPTION CONTROL SYSTEMBCS-13
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POWER CONSUMPTION CONTROL SYSTEM
System DiagramINFOID:0000000003776384
System DescriptionINFOID:0 INFINITI QX56 2009 Factory Service Manual
BCS
POWER CONSUMPTION CONTROL SYSTEMBCS-13
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POWER CONSUMPTION CONTROL SYSTEM
System DiagramINFOID:0000000003776384
System DescriptionINFOID:0](/manual-img/42/57031/w960_57031-386.png)
BCS
POWER CONSUMPTION CONTROL SYSTEMBCS-13
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POWER CONSUMPTION CONTROL SYSTEM
System DiagramINFOID:0000000003776384
System DescriptionINFOID:0000000003776385
OUTLINE
BCM incorporates a power consumpt
ion control function that reduces the power consumption according to
the vehicle status.
BCM switches the status (control m ode) by itself with the power saving control function. It performs the sleep
request to each unit (PDM E/R, combination meter and In telligent 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 follo wing 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 communicati on 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.
AWMIA0082GB
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BCS-14
< FUNCTION DIAGNOSIS >[BCM]
POWER CONSUMPTION CONTROL SYSTEM
Sleep condition
Wake-up operation
BCM transmits sleep wake up signal (wake up) to eac
h unit when any condition listed below is e INFINITI QX56 2009 Factory Service Manual
BCS-14
< FUNCTION DIAGNOSIS >[BCM]
POWER CONSUMPTION CONTROL SYSTEM
Sleep condition
Wake-up operation
BCM transmits sleep wake up signal (wake up) to eac
h unit when any condition listed below is e](/manual-img/42/57031/w960_57031-387.png)
BCS-14
< FUNCTION DIAGNOSIS >[BCM]
POWER CONSUMPTION CONTROL SYSTEM
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-
mits wake up signals to BCM with CAN communication to convey the start of CAN communication.
Wake-up condition
CAN sleep condition B CM sleep condition
Receiving the sleep-ready signal (ready) from all units
Ignition switch: OFF
Vehicle security system alarm: No operation
Warning lamp: No operation
Warning chime: No operation
Stop lamp switch: OFF
Key switch status: No change for 2 seconds
Hazard warning lamp: No operation
Exterior lamp: OFF
Door lock status: No change for 2 seconds
CONSULT-III communication status: No communication
Door switch status: No change for 2 seconds 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
Intelligent Key unit: Receiving
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POWER CONSUMPTION CONTROL SYSTEMBCS-15
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Component Parts LocationINFOID:0000000003776386
1. Steering column
(view with instru-
ment panel removed) 2. BCM M18, M19, M20 3. Combination meter M24
4. IPDM E/R E119, E120, E121, E122, E123, E124 5. Intelligent Key unit M70 (view with in-
strument panel removed)
ALMIA0418ZZ
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BCS-16
< FUNCTION DIAGNOSIS >[BCM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu
nction (BCM - COMMON ITEM)INFOID:0000000003776387
APPLICATION ITEM
CONSULT-II INFINITI QX56 2009 Factory Service Manual
BCS-16
< FUNCTION DIAGNOSIS >[BCM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu
nction (BCM - COMMON ITEM)INFOID:0000000003776387
APPLICATION ITEM
CONSULT-II](/manual-img/42/57031/w960_57031-389.png)
BCS-16
< FUNCTION DIAGNOSIS >[BCM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu
nction (BCM - COMMON ITEM)INFOID:0000000003776387
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:0000000003776388
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-51, "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 BCM ×
Door lock DOOR LOCK ×××
Rear window defo gger 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 ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
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BCS
DIAGNOSIS SYSTEM (BCM)BCS-17
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DOOR LOCK
DOOR LOCK : CONSULT-III Fu
nction (BCM - DOOR LOCK)INFOID:0000000003776389
WORK SUPPORT
DATA MONI INFINITI QX56 2009 Factory Service Manual
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DIAGNOSIS SYSTEM (BCM)BCS-17
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DOOR LOCK
DOOR LOCK : CONSULT-III Fu
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WORK SUPPORT
DATA MONI](/manual-img/42/57031/w960_57031-390.png)
BCS
DIAGNOSIS SYSTEM (BCM)BCS-17
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DOOR LOCK
DOOR LOCK : CONSULT-III Fu
nction (BCM - DOOR LOCK)INFOID:0000000003776389
WORK SUPPORT
DATA MONITOR
ACTIVE TEST
REAR WINDOW DEFOGGER
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
Work Item Description
DOOR LOCK-UNLOCK SET ON
OFF
ANTI-LOCK OUT SET ON
OFF
AUTOMATIC DOOR LOCK SELECT SHIFT OUT OF P
VH SPD
AUTOMATIC DOOR UNLOCK SE-
LECT MODE1
MODE2
MODE3
MODE4
MODE5
MODE6
AUTOMATIC LOCK/UNLOCK SE-
LECT ON
OFF
Monitor Item
[Unit} Description
IGN ON SW [ON/OFF] Indicates condition of ignition switch in ON position
KEY ON SW [ON/OFF] Indicate s condition of key switch
CDL LOCK SW [ON/OFF] Indicates condition of door lock and unlock switch
CDL UNLOCK SW [ON/OFF] Indicates condition of door lock and unlock switch
DOOR SW-DR [ON/OFF] Indicates condition of front door switch LH
DOOR SW-AS [ON/OFF] Indicates condition of front door switch RH
DOOR SW-RR [ON/OFF] Indicates condition of rear door switch RH
DOOR SW-RL [ON/OFF] Indicates condition of rear door switch LH
BACK DOOR SW [ON/OFF] Indicates condition of back door switch
KEY CYL LK-SW [ON/OFF] Indicates condition of lo ck signal from door key cylinder switch
KEY CYL UN-SW [ON/OFF] Indicates condition of un lock signal from door key cylinder switch
I-KEY LOCK [ON/OFF] Indicates condition of lock signal from Intelligent Key
I-KEY UNLOCK [ON/OFF] Indicates condition of unlock signal from Intelligent Key
Test Item Description
DOOR LOCK This test is able to check door lock operation [ALL LOCK/ALL UNLOCK/DR UNLOCK/
OTHER UNLOCK].
TRUNK/BACK DOOR This test is able to check trunk/back door lock operation [LOCK (SET)/UNLOCK (RE-
LEASE)].
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BCS-18
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DIAGNOSIS SYSTEM (BCM)
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000003776390
DATA MONITOR
BUZZER
BUZZER : CONSULT-III Function INFINITI QX56 2009 Factory Service Manual
BCS-18
< FUNCTION DIAGNOSIS >[BCM]
DIAGNOSIS SYSTEM (BCM)
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000003776390
DATA MONITOR
BUZZER
BUZZER : CONSULT-III Function](/manual-img/42/57031/w960_57031-391.png)
BCS-18
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DIAGNOSIS SYSTEM (BCM)
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000003776390
DATA MONITOR
BUZZER
BUZZER : CONSULT-III Function (BCM - BUZZER)INFOID:0000000003776391
DATA MONITOR
ACTIVE TEST
INT LAMP
INT LAMP : CONSULT-III Function (BCM - INT LAMP)INFOID:0000000003776392
WORK SUPPORT
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Indicates condition of ignition switch in ON position
IGN ACC SW [ON/OFF] Indicates condition of ignition switch in ACC position
REAR DEF SW [ON/OFF] Displays “Press (ON)/other (OFF)” stat us determined with the rear window defogger switch
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) st atus judged by ignition power supply input
KEY ON SW [ON/OFF] Key switch status
DOOR SW -DR [ON/OFF] Front door switch (driver side) status judged by BCM
LIGHT SW 1ST [ON/OFF] Lighting switch status judged by the lighting switch signal read with combination switch reading func-
tion
BUCKLE SW [ON/OFF] Seat belt buckle switch status
Test Item Description
LIGHT WARN ALM The light reminder warning operation can be checked by operating the relevant function (On/Off).
IGN KEY WARN ALM The key reminder warnin g operation can be checked by operating the relevant function (On/Off).
SEAT BELT WARN TEST The seat belt warning operation can be checked by operating the relevant function (On/Off).
DOOR WARNING IND The door open warning operation can be checked by operating the relevant function (On/Off).
JPLIA0093GB
Revision: December 20092009 QX56