diagram INFINITI QX56 2010 Factory Manual Online

AV
AMP ON SIGNAL CIRCUITAV-105
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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AMP ON SIGNAL CIRCUIT
DescriptionINFOID:0000000005146339
When the audio system is turned on, a voltage signal is s upplied from the AV control unit to the BOSE speaker
amp. When this signal is received, t he BOSE speaker amp. will turn on.
Diagnosis ProcedureINFOID:0000000005146340
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)
1. Turn audio system ON.
2. Check voltage between BOSE speaker amp. harness connector M113 terminal 31 and ground.
Is battery voltage present?
YES >> Inspection End.
NO >> GO TO 2.
2.CHECK AMP ON SIGNAL (AV CONTROL UNIT)
Check voltage between AV control unit harness connector M42 ter-
minal 1 and ground.
Is battery voltage present?
YES >> Repair harness or connector.
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
31 - Ground
: Battery voltage
ALNIA0369GB
1 - Ground: Battery voltage
ALNIA0420GB
Revision: April 20092010 QX56

AV-106
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
STEERING SWITCH
STEERING SWITCH
DescriptionINFOID:0000000005146341
When one of the steering wheel audio control switches
is pushed, the resistance in the steering wheel audio
control switch circuit changes depending on which button is pushed.
Diagnosis ProcedureINFOID:0000000005146342
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect steering wheel audio control switch connector M102.
3. Check resistance between steering switch connector terminals.
Do the steering wheel audio control switches check OK?
YES >> GO TO 2.
NO >> Replace steering wheel audio control switch. Refer to AV-179, "
Removal and Installation".
2.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M42 and spiral cable con- nector M30.
3. Check continuity between AV control unit harness connector M42 (A) and spiral cable harness connector M30 (B).
4. Check continuity between AV c ontrol unit connector M42 (A) and ground.
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17 Seek (down)
Depress switch. 165
Volume (down) Depress VOL down switch. 487
Phone/Send Depress switch. 0
20 17 Seek (up)
Depress switch. 165
Volume (up) Depress VOL up switch. 487
Mode/End Depress switch. 0
WKIA4457E
AB

Continuity
Connector Terminal Connector Terminal
M42 6
M30 24
Ye s
15 31
16 32
A —Continuity
Connector Terminal
M42 6
Ground No
15
16
ALNIA0332GB
Revision: April 20092010 QX56

AV-108
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
MICROPHONE SIGNAL CIRCUIT
MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000005146343
Voice signals are transmitted from the microphone to the
AV control unit using the microphone signal circuits.
Diagnosis ProcedureINFOID:0000000005146344
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connec- tor.
3. Check continuity between AV control unit harness connector M45 (A) and microphone harness connector R109 (B).
4. Check continuity between AV control unit harness connector M45 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK MICROPHONE POWER SUPPLY
1. Connect AV control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone harness connector R109 terminal 4 and ground.
Is voltage reading approx. 5 volts?
YES >> GO TO 3.
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
3.CHECK MICROPHONE SIGNAL
AB
Continuity
Connector Terminal Connector Terminal
M45 72
R109 1
Ye s
71 2
70 4
A —Con tin uit y
Connector Terminal
M45 70
GroundNo
71
72
AWLIA1603ZZ
4 - Ground : Approx. 5V
WKIA5796E
Revision: April 20092010 QX56

AV-116
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
Wiring Diagram
INFOID:0000000005146346
ABNWA0012GB
Revision: April 20092010 QX56

BCS
BCS-1
ELECTRICAL & POWER CONTROL
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SECTION BCS
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CONTENTS
BODY CONTROL SYSTEM
BCM
BASIC INSPECTION ....... .............................
3
INSPECTION AND ADJUSTMENT ................ .....3
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
3
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ..................................
3
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
3
CONFIGURATION ................................................. ......3
CONFIGURATION : Description ...............................3
CONFIGURATION : Special Repair Requirement ......4
FUNCTION DIAGNOSIS .. .............................5
BODY CONTROL SYSTEM ........................... .....5
System Description ............................................. ......5
Component Parts Location ........................................6
COMBINATION SWITCH READING SYSTEM
.....
7
System Diagram .................................................. ......7
System Description ...................................................7
Component Parts Location ......................................10
SIGNAL BUFFER SYSTEM ...............................12
System Diagram .................................................. ....12
System Description .................................................12
POWER CONSUMPTION CONTROL SYS-
TEM ....................................................................
13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................15
DIAGNOSIS SYSTEM (BCM) ............................16
COMMON ITEM ..................................................... ....16
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
16
BCM ....................................................................... ....16
BCM : CONSULT-III Function (BCM - BCM) ...........17
DOOR LOCK .......................................................... ....17
DOOR LOCK : CONSULT-III Function (BCM -
DOOR LOCK) ..........................................................
17
REAR WINDOW DEFOGGER ............................... ....17
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) .....................
18
BUZZER ................................................................. ....18
BUZZER : CONSULT-III Function (BCM - BUZZ-
ER) ..........................................................................
18
INT LAMP ............................................................... ....18
INT LAMP : CONSULT-III Function (BCM - INT
LAMP) ......................................................................
19
MULTIREMOTE ENT ............................................. ....20
MULTIREMOTE ENT : CONSULT-III Function
(BCM - MULTIREMOTE ENT) .................................
20
HEADLAMP ........................................................... ....21
HEADLAMP : CONSULT-III Function (BCM -
HEAD LAMP) ...........................................................
22
WIPER .................................................................... ....23
WIPER : CONSULT-III Function (BCM - WIPER) ....23
FLASHER ............................................................... ....24
FLASHER : CONSULT-III Function (BCM -
FLASHER) ...............................................................
24
AIR CONDITIONER ............................................... ....24
AIR CONDITIONER : CONSULT-III Function
(BCM - AIR CONDITIONER) ...................................
24
INTELLIGENT KEY ................................................ ....25
INTELLIGENT KEY : CONSULT-III Function
(BCM - INTELLIGENT KEY) ....................................
25
Revision: April 20092010 QX56

BCS-2
COMB SW .................................................................25
COMB SW : CONSULT-III Function (BCM -
COMB SW) .............................................................
25
IMMU ...................................................................... ...26
IMMU : CONSULT-III Function (BCM - IMMU) .......26
BATTERY SAVER ................................................. ...26
BATTERY SAVER : CONSULT-III Function (BCM
- BATTERY SAVER) ........................................... ...
26
TRUNK ................................................................... ...27
TRUNK : CONSULT-III Function (BCM - TRUNK) ...27
RETAINED PWR .................................................... ...27
RETAINED PWR : CONSULT-III Function (BCM -
RETAINED PWR) ...................................................
27
SIGNAL BUFFER ................................................... ...27
SIGNAL BUFFER : CONSULT-III Function (BCM
- SIGNAL BUFFER) ................................................
28
AIR PRESSURE MONITOR ................................... ...28
AIR PRESSURE MONITOR : Diagnosis Descrip-
tion ..........................................................................
28
AIR PRESSURE MONITOR : CONSULT-III Func-
tion ....................................................................... ...
30
THEFT ALM ........................................................... ...30
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ..........................................................
30
PANIC ALARM ....................................................... ...31
PANIC ALARM : CONSULT-III Function (BCM -
PANIC ALARM) ................................................... ...
31
COMPONENT DIAGNOSIS ........................32
U1000 CAN COMM CIRCUIT ......................... ...32
Description ........................................................... ...32
DTC Logic ...............................................................32
Diagnosis Procedure ..............................................32
POWER SUPPLY AND GROUND CIRCUIT .....33
Diagnosis Procedure ........................................... ...33
COMBINATION SWITCH INPUT CIRCUIT .......35
Diagnosis Procedure ............................................ ...35
Special Repair Requirement ...................................36
COMBINATION SWITCH OUTPUT CIRCUIT ...37
Diagnosis Procedure ...............................................37
Special Repair Requirement ...................................37
COMBINATION SWITCH ..................................38
Description ........................................................... ...38
Diagnosis Procedure ...............................................38
ECU DIAGNOSIS .......................................40
BCM (BODY CONTROL MODULE) ............... ...40
Reference Value .................................................. ...40
Terminal Layout ......................................................43
Physical Values .......................................................43
Wiring Diagram .......................................................49
Fail Safe .................................................................53
DTC Inspection Priority Chart ...............................54
DTC Index ..............................................................54
SYMPTOM DIAGNOSIS ............................56
COMBINATION SWITCH SYSTEM SYMP-
TOMS .............................................................. ...
56
Symptom Table .................................................... ...56
PRECAUTION ............................................57
PRECAUTIONS .............................................. ...57
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
57
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
57
ON-VEHICLE REPAIR ...............................59
BCM (BODY CONTROL MODULE) ............... ...59
Removal and Installation .........................................59
Revision: April 20092010 QX56

BCS
BODY CONTROL SYSTEMBCS-5
< FUNCTION DIAGNOSIS > [BCM]
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FUNCTION DIAGNOSIS
BODY CONTROL SYSTEM
System DescriptionINFOID:0000000005146384
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 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-14, "System Diagram"
Front fog lamp systemEXL-14, "System Diagram"
Daytime running light system (if equipped)EXL-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 system DLK-14, "DOOR LOCK AND UNLOCK SWITCH : System Diagram"
(NATS) Nissan anti-theft systemSEC-14, "System Diagram"
Vehicle security systemSEC-18, "System Diagram"
Rear window defogger systemDEF-4, "System Diagram"
Intelligent Key systemSEC-10, "System Diagram"
Power window systemPWC-5, "SystemDiagram"
RAP (retained accessory power) systemBCS-27, "RETAINED PWR : CONSULT-III Function (BCM - RETAINED
PWR)"
TPMS (tire pressure monitoring system)
BCS-30, "AIR PRESSURE MONITOR : CONSULT-III Function"
Revision: April 20092010 QX56

BCS
COMBINATION SWITCH READING SYSTEMBCS-7
< FUNCTION DIAGNOSIS > [BCM]
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COMBINATION SWITCH
READING SYSTEM
System DiagramINFOID:0000000005146386
System DescriptionINFOID:0000000005146387
OUTLINE
• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the
status of each switch.
• BCM is a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a
maximum of 20 switch status.
COMBINATION SWITCH MATRIX
LIIA0757E
Revision: April 20092010 QX56

BCS-12
< FUNCTION DIAGNOSIS >[BCM]
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM
System DiagramINFOID:0000000005146389
System DescriptionINFOID:0000000005146390
OUTLINE
BCM has the signal transmission function that output
s/transmits each input/received signal to each unit.
Signal transmission function list
ALMIA0263GB
Signal nameInputOutputDescription
Oil pressure switch signal IPDM E/R (CAN) Combination meter (CAN)Transmits the received oil pres-
sure switch signal via CAN
communication.
Revision: April 20092010 QX56

BCS
POWER CONSUMPTION CONTROL SYSTEMBCS-13
< FUNCTION DIAGNOSIS > [BCM]
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POWER CONSUMPTION CONTROL SYSTEM
System DiagramINFOID:0000000005146391
System DescriptionINFOID:0000000005146392
OUTLINE
• BCM incorporates a power consumpt
ion 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 (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 following 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
Revision: April 20092010 QX56