2004 INFINITI QX56 Ins

BCS-2
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS007GD
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NIN G:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.

BCM (BODY CONTROL MODULE)
BCS-3
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BCM (BODY CONTROL MODULE)PFP:284B2
System DescriptionEKS007GE

BCM (body control module) controls the operation of various electrical units installed on the vehicle.
BCM FUNCTION
BCM has a combination switch reading function for reading the operation of combination switches (light, wiper
washer, turn signal) in addition to the function for controlling the operation of various electrical components.
Also, it functions as an interface that receives signals from the front air control, and sends signals to ECM
using CAN communication.
COMBINATION SWITCH READING FUNCTION
1. Description

BCM reads combination switch (light, wiper) status, and controls various electrical components accord-
ing to the results.

BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5)
and five input terminals (INPUT 1-5).
2. Operation description

BCM activates transistors of output terminals (OUTPUT 1-5) periodically and allows current to flow in
turn.

If any (1 or more) of the switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input ter-
minals (INPUT 1-5) becomes active.

At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When
voltage of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects
voltage change and BCM determines that switch is ON.
3. BCM - Operation table of combination switch

BCM reads operation status of combination switch by the combination shown in the following table.
LIIA0757E

BCM (BODY CONTROL MODULE)
BCS-11
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CONSULT-II Function (BCM)EKS007GH
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With ignition switch OFF, connect CONSULT-II and CONSULT-II
CONVERTER to data link connector and turn ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen.
If "BCM" is not indicated, go to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E

BCS-12
BCM (BODY CONTROL MODULE)
Revision: August 20072004 QX56
4. Select item to be diagnosed on “SELECT TEST ITEM” screen.
ITEMS OF EACH PART
NOTE:
CONSULT-II will only display systems the vehicle possesses.
WORK SUPPORT
Operation Procedure
1. Touch "BCM" on "SELECT TEST ITEM" screen.
2. Touch "WORK SUPPORT" on "SELECT DIAG MODE" screen.
3. Touch "RESET SETTING VALUE" on "SELECT WORK ITEM" screen.
4. Touch "START".
5. "RESET SETTING VALUE OK?" is displayed, and touch "YES".
6. The setting will be changed and "COMPLETED" will be displayed.
7. Touch "END".
LKIA0183E
System and itemCONSULT-II
displayDiagnostic test mode (Inspection by part)
WORK
SUPPORTSELF−DIAG
RESULTSCAN DIAG
SUPPORT
MNTRDATA
MONITORECU
PA R T
NUMBERACTIVE
TESTCONFIG-
URA-
TION
BCM BCM×× × × ×
Power door lock sys-
temDOOR LOCK×××
Rear defoggerREAR
DEFOGGER××
Warning chime BUZZER××
Room lamp timer INT LAMP×××
Remote keyless
entry systemMULTI
REMOTE ENT×××
Headlamp HEAD LAMP×××
Wiper WIPER××
Turn signal lamp
Hazard lampFLASHER××
Blower fan switch
signal
Air conditioner
switch signalAIR
CONDITIONER×
Combination switch COMB SW×
IVIS (NATS) IMMU××
Interior lamp battery
saverBATTERY
SAVER×××
Back door BACK DOOR××
Retained power con-
trolRETAINED
PWR×××

BCM (BODY CONTROL MODULE)
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Display Item List
CAN Communication Inspection Using CONSULT-II (Self-Diagnosis)EKS007GI
1. SELF-DIAGNOSTIC RESULT CHECK
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Connect to CONSULT-II, and select “BCM” on “SELECT SYSTEM” screen.
2. Select “BCM” on “SELECT TEST ITEM” screen, and select “SELF-DIAG RESULTS”.
3. Check display content in self-diagnostic results.
Contents displayed
No malfunction>>Inspection End
Malfunction in CAN communication system>>After printing the monitor items, go to LAN-5, "
CAN COMMU-
NICATION" .
ConfigurationEKS007GJ
DESCRIPTION
CONFIGURATION has two functions as follows:

READ CONFIGURATION is the function to confirm vehicle configuration of current BCM.

WRITE CONFIGURATION is the function to write vehicle configuration on BCM.
CAUTION:

When replacing BCM, you must perform WRITE CONFIGURATION with CONSULT-II.

Complete the procedure of WRITE CONFIGURATION in order.

If you set incorrect WRITE CONFIGURATION, incidents will occur.

Configuration is different for each vehicle model. Confirm configuration of each vehicle model.
READ CONFIGURATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With ignition switch OFF, connect CONSULT-II and CONSULT-II
CONVERTER to data link connector and turn ignition switch ON.
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
CONSULT-II display code Diagnosis item
U1000INITIAL DIAG
TRANSMIT DIAG
ECM
IPDM E/R
METER/M&A
I-KEY
BBIA0369E

BCM (BODY CONTROL MODULE)
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14. Touch "OK" on "WRITE CONFIGURATION" screen.
WRITE CONFIGURATION is completed.
Removal and Installation of BCMEKS007GK
REMOVAL
NOTE:
If possible, before removing BCM, retrieve current BCM configuration to use for reference when configuring
brand-new BCM after installation. Refer to BCS-13, "
Configuration" .
1. Disconnect negative battery cable.
2. Remove lower knee protector LH. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
3. Remove screw and release BCM.
4. Disconnect connectors and then remove BCM.
INSTALLATION
Installation is in the reverse order of removal.
NOTE:

When replacing BCM, it must be configured. Refer to BCS-13, "Configuration" .

When replacing BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.
Refer to BL-138, "
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)" .

When replacing BCM, perform ID registration procedure of low tire pressure warning system. Refer to
WT-13, "
ID Registration Procedure" .
LKIA0400E
LEIA0068E

BL-1
BODY, LOCK & SECURITY SYSTEM
I BODY
CONTENTS
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SECTION BL
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BL
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for work ................................................ 4
Wiring Diagnosis and Trouble Diagnosis ................. 4
PREPARATION ........................................................... 5
Special service tool .................................................. 5
Commercial Service Tool ......................................... 5
SQUEAK AND RATTLE TROUBLE DIAGNOSIS ...... 6
Work Flow ................................................................ 6
CUSTOMER INTERVIEW ..................................... 6
DUPLICATE THE NOISE AND TEST DRIVE ....... 7
CHECK RELATED SERVICE BULLETINS ........... 7
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ...................................................... 7
REPAIR THE CAUSE ........................................... 7
CONFIRM THE REPAIR ....................................... 8
Generic Squeak and Rattle Troubleshooting ........... 8
INSTRUMENT PANEL .......................................... 8
CENTER CONSOLE ............................................. 8
DOORS ................................................................. 8
BACK DOOR ......................................................... 9
SUNROOF/HEADLINER ....................................... 9
OVERHEAD CONSOLE (FRONT AND REAR) ..... 9
SEATS ................................................................... 9
UNDERHOOD ....................................................... 9
Diagnostic Worksheet ............................................ 10
HOOD ....................................................................... 12
Fitting Adjustment .................................................. 12
CLEARANCE AND SURFACE HEIGHT
ADJUSTMENT .................................................... 13
HOOD LOCK ADJUSTMENT ............................. 13
Removal and Installation of Hood Assembly .......... 13
Removal and Installation of Hood Lock Control ..... 14
REMOVAL ........................................................... 14
INSTALLATION ................................................... 15
Hood Lock Control Inspection ................................ 15
POWER DOOR LOCK SYSTEM .............................. 16
Component Parts and Harness Connector Location ... 16System Description ................................................. 17
OUTLINE ............................................................. 18
Schematic ............................................................... 19
Wiring Diagram — D/LOCK — ............................... 20
Terminals and Reference Value for BCM ............... 25
Work Flow ............................................................... 25
CONSULT–II Function (BCM) ................................ 26
CONSULT–II INSPECTION PROCEDURE ......... 26
DATA MONITOR ................................................. 27
ACTIVE TEST ..................................................... 28
Trouble Diagnoses Symptom Chart ....................... 29
BCM Power Supply and Ground Circuit Check ...... 29
Door Switch Check ................................................. 31
Key Switch (Insert) Check ...................................... 33
Door Lock/Unlock Switch Check ............................ 34
Glass Hatch Switch Circuit Inspection .................... 36
Front Door Lock Assembly LH (Actuator) Check .... 37
Front Door Lock Actuator RH Check ...................... 39
Rear Door Lock Actuator RH/LH Check ................. 40
Glass Hatch Lock Actuator Check .......................... 41
Front Door Lock Assembly LH (Key Cylinder Switch)
Check ..................................................................... 42
REMOTE KEYLESS ENTRY SYSTEM ..................... 44
Component Parts and Harness Connector Location ... 44
System Description ................................................. 45
INPUTS ............................................................... 45
OPERATING PROCEDURE ................................ 46
CAN Communication System Description .............. 48
Schematic ............................................................... 49
Wiring Diagram — KEYLES — ............................... 50
............................................................................ 50
............................................................................ 51
............................................................................ 52
Terminals and Reference Value for BCM ............... 53
Terminals and Reference Value for IPDM E/R ....... 54
CONSULT-II Function (BCM) ................................. 55
CONSULT-II Inspection Procedure ......................... 55
“MULTI REMOTE ENT” ....................................... 55
CONSULT-II Application Items ............................... 56
“MULTI REMOTE ENT” ....................................... 56

BL-2Revision: August 20072004 QX56 Trouble Diagnosis Procedure ................................. 59
BCM Power Supply and Ground Circuit Check ...... 59
Trouble Diagnoses .................................................. 60
SYMPTOM CHART ............................................. 60
Key Switch (Insert) Check ...................................... 62
Door Switch Check ................................................. 63
Keyfob Battery and Function Check ....................... 65
Remote Keyless Entry Receiver System Check ..... 66
ACC Power Check .................................................. 68
IPDM E/R Operation Check .................................... 68
Check Hazard Function .......................................... 70
Check Horn Function .............................................. 70
Check Headlamp Function ..................................... 70
Check Map Lamp Illumination Function ................. 70
ID Code Entry Procedure ....................................... 71
KEYFOB ID SET UP WITH CONSULT-II ............ 71
KEYFOB ID SET UP WITHOUT CONSULT-II ..... 73
Keyfob Battery Replacement .................................. 74
VEHICLE SECURITY (THEFT WARNING) SYSTEM ... 75
Component Parts and Harness Connector Location ... 75
System Description ................................................. 76
DESCRIPTION .................................................... 76
POWER SUPPLY AND GROUND CIRCUIT ....... 76
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM ..................................................................... 77
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION .................................................................. 78
VEHICLE SECURITY SYSTEM DEACTIVATION ... 78
PANIC ALARM OPERATION ............................... 78
CAN Communication System Description .............. 78
Schematic ............................................................... 79
Wiring Diagram — VEHSEC — .............................. 80
............................................................................. 80
............................................................................. 81
............................................................................. 82
............................................................................. 83
............................................................................. 84
Terminals and Reference Value for BCM ................ 85
Terminals and Reference Value for IPDM E/R ........ 86
CONSULT-II Function (BCM) .................................. 86
CONSULT-II INSPECTION PROCEDURE .......... 87
CONSULT-II APPLICATION ITEM ....................... 89
Trouble Diagnosis ................................................... 90
WORK FLOW ...................................................... 90
Preliminary Check .................................................. 91
Symptom Chart ....................................................... 92
Door Switch Check ................................................. 93
Hood Switch Check ................................................ 95
Combination Meter (Security Indicator Lamp)
Check ..................................................................... 97
Front Door Lock Assembly LH (Key Cylinder Switch)
Check ..................................................................... 98
Vehicle Security Horn Alarm Check ......................100
Vehicle Security Headlamp Alarm Check .............100
Door Lock/Unlock Switch Check ..........................100
AUTOMATIC BACK DOOR SYSTEM .....................101
Component Parts and Harness Connector Location .101
System Description ...............................................102
OPERATION DESCRIPTION ............................102Schematic ............................................................. 107
Wiring Diagram — B/CLOS — .............................. 108
Terminals and Reference Value for Back Door Con-
trol Unit ..................................................................113
Terminals and Reference Value for BCM ..............114
Trouble Diagnosis Procedure ................................115
Self-Diagnosis Procedures ...................................115
INPUT SIGNAL CHECK MODE .........................115
OPERATING CHECK MODE .............................115
Diagnosis Chart ....................................................116
Back Door Power Supply and Ground Circuit
Inspection ..............................................................117
Power Liftgate Switch System Inspection .............118
GLASS HATCH AJAR SWITCH CHECK ...........119
Back Door Close (Close) Switch System Inspection . 120
Back Door Close (Cancel) Switch System Inspec-
tion ........................................................................ 121
Pinch Strip System Inspection .............................. 122
Back Door Warning Chime System Inspection ..... 123
Half-Latch Switch System Inspection .................... 124
Open Switch System Inspection ........................... 125
Close Switch System Inspection ........................... 126
Back Door Handle Switch System Inspection ....... 127
Cinch Latch Motor System Inspection .................. 128
DOOR ...................................................................... 129
Fitting Adjustment ................................................. 129
FRONT DOOR ................................................... 129
REAR DOOR ..................................................... 129
STRIKER ADJUSTMENT .................................. 129
Removal and Installation ....................................... 130
FRONT DOOR ................................................... 130
REAR DOOR ..................................................... 130
BACK DOOR ..................................................... 131
FRONT DOOR LOCK .............................................. 132
Component Structure ............................................ 132
Removal and Installation ....................................... 132
REMOVAL .......................................................... 132
INSTALLATION .................................................. 134
Disassembly and Assembly .................................. 134
DOOR KEY CYLINDER ASSEMBLY ................. 134
REAR DOOR LOCK ................................................ 135
Component Structure ............................................ 135
Removal and Installation ....................................... 135
REMOVAL .......................................................... 135
INSTALLATION .................................................. 135
BACK DOOR LOCK ................................................ 136
Power Back Door Opener ..................................... 136
REMOVAL ......................................................... 136
INSTALLATION ................................................. 136
Door Lock Assembly ............................................. 137
REMOVAL ......................................................... 137
INSTALLATION ................................................. 137
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ...................................................................... 138
Component Parts and Harness Connector Location . 138
System Description ............................................... 139
System Composition ............................................. 139
ECM Re-communicating Function ........................ 140
Wiring Diagram — NATS — .................................. 141