2007 INFINITI QX56 headlamp

BCS-4
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
NOTE:
Headlamp has a dual system switch.
4. Example operation: (When lighting switch 1st position turned ON)
• When lighting switch 1st position is turned ON, contact in combination switch turns ON. At this time if
OUTPUT 4 transistor is activated, BCM detects that voltage changes in INPUT 5.
• When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, and judges lighting
switch 1st position is ON. Then BCM sends tail lamp ON signal to IPDM E/R using CAN communication.
• When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and rec-
ognizes that lighting switch 1st position is continuously ON.
NOTE:
Each OUTPUT terminal transistor is activated at 10ms intervals. Therefore, after a switch is turned ON,
electrical loads are activated with a time delay. But this time delay is so short that it cannot be noticed.
5. Operation mode
• Combination switch reading function has operation modes as follows:
SKIA4959E
LIIA0760E

BCS-6
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
• When CAN communication operation is detected, it switches to CAN communication status.
• When a state of the following switches changes, it switches to CAN communication state:
- Ignition switch
- Key switch (insert)
- Hazard switch
- Main door lock/unlock switch
- Front door switch (LH, RH)
- Rear door switch (LH, RH)
- Back latch (door ajar switch)
- Glass hatch ajar switch
- Combination switch (passing, lighting switch 1st position, front fog lamp)
- Keyfob (lock/unlock signal)
- Front door lock assembly LH (key cylinder switch)
• When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.
• Status of combination switch reading function is changed.
SYSTEMS CONTROLLED BY BCM DIRECTLY
• Power door lock system. Refer to BL-15.
• Remote keyless entry system. Refer to BL-37
.
• Power window system. Refer to GW-15
. NOTE
• Sunroof system. Refer to RF-10. NOTE
• Room lamp timer. Refer to LT-101.
• Warning chime system. Refer to DI-36
.
• Turn signal and hazard warning lamps system. Refer to LT- 5 7
.
• Trailer turn signal and hazard warning lamps system (if equipped). Refer to LT- 9 4
.
• Rear wiper and washer system. Refer to WW-26
.
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
• Panic system. Refer to BL-37.
• Vehicle security system. Refer to BL-60
.
• IVIS (NATS) system. Refer to BL-116
.
• Headlamp, tail lamp, front fog lamp, auto light and battery saver control systems. Refer to LT- 5
, LT- 2 4, LT- 8 2,
LT- 4 9
or LT- 3 4.
• Front wiper and washer system. Refer to WW-3
.
• Rear window defogger system. Refer to GW-68
.
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
Remote keyless entry system Remote keyless entry receiver (keyfob)• All door locking actuators
• Back door opener actuator
• Turn signal lamps
Power door lock system• Front power door lock/unlock switch (LH, RH)
• All door switches
• Key switchAll door locking actuators
Power supply [ignition (IGN)/retained ac-
cessory power (RAP)] to power window
and sunroofIGN/RAP supplyPower supply to power window and
sunroof system
Power supply (BAT) to power window
and sunroofBattery power supplyPower supply to power window and
sunroof system
Panic alarm• Key switch
• Remote keyless entry receiver (keyfob)IPDM E/R
Auto light system• Optical sensor
• Combination switchIPDM E/R
Battery saver control• Ignition switch
• Combination switch
• Front door switch LH and RHIPDM E/R

BCM (BODY CONTROL MODULE)
BCS-7
< SERVICE INFORMATION >
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CAN Communication System DescriptionINFOID:0000000003533597
Refer to LAN-4.
Headlamp Combination switch IPDM E/R
Tail lamp Combination switch IPDM E/R
Front fog lamp Combination switch IPDM E/R
Turn signal lamp Combination switch• Turn signal lamp
• Combination meter
Hazard lamp Hazard switch• Turn signal lamp
• Combination meter
Room lamp timer• Key switch
• Remote keyless entry receiver (keyfob)
• Main power window and door lock/unlock switch
• Front door lock assembly LH (key cylinder switch)
• All door switchesInterior room lamp
Key warning chime• Key switch
• Front door switch LHCombination meter (warning buzz-
er)
Light warning chime• Combination switch
• Key switch
• Front door switch LHCombination meter (warning buzz-
er)
Vehicle-speed-sensing intermittent wip-
er• Combination switch
• Combination meterIPDM E/R
Rear window defogger Rear window defogger switch IPDM E/R
Air conditioner switch signal Front air control ECM
Blower fan switch signal Front air control ECM
Low tire pressure warning system Remote keyless entry receiver• Combination meter
• Display control unit
Trailer tow (if equipped) Combination switch Trailer turn signal relays
Vehicle security system• Remote keyless entry receiver (keyfob)
• Main power window and door lock/unlock switch
• Power window and door lock/unlock switch RH
• Front door lock assembly LH (key cylinder switch)
• All door switches
• Back door latch (door ajar switch)• IPDM E/R
• Security indicator lamp System Input Output

BCM (BODY CONTROL MODULE)
BCS-17
< SERVICE INFORMATION >
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CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
ITEMS OF EACH PART
NOTE:
CONSULT-II will only display systems the vehicle possesses.
WORK SUPPORT
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
MNTRThe 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.
System and itemCONSULT-II
displayDiagnostic test mode (Inspection by part)
WORK
SUPPORTSELF−
DIAG RE-
SULTSCAN DIAG
SUPPORT
MNTRDATA
MONITORECU
PA R T
NUMBERAC-
TIVE
TESTCON-
FIGU-
RATION
BCM BCM×× × × ×
Power door lock system DOOR LOCK×××
Rear defoggerREAR
DEFOGGER××
Warning chime BUZZER××
Room lamp timer INT LAMP×××
Remote keyless entry
systemMULTI REMOTE
ENT×××
Headlamp HEAD LAMP×××
Wiper (front/rear) 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 SAV-
ER×××
Back door TRUNK××
Theft alarm THEFT ALM×××
Retained accessory
power controlRETAINED PWR×××
Oil pressure switch SIGNAL BUFFER××
Low tire pressure moni-
tor systemAIR PRESSURE
MONITOR×× × ×
Panic alarm PANIC ALARM×

BL-1
BODY
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SECTION BL
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CONTENTS
BODY, LOCK & SECURITY SYSTEM
SERVICE INFORMATION ............................3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for work ...................................................3
PREPARATION ...................................................4
Special Service Tool .................................................4
Commercial Service Tool ..........................................4
SQUEAK AND RATTLE TROUBLE DIAGNO-
SIS .......................................................................
5
Work Flow .................................................................5
Generic Squeak and Rattle Troubleshooting ............7
Diagnostic Worksheet ...............................................9
HOOD .................................................................11
Fitting Adjustment ...................................................11
Removal and Installation of Hood Assembly ...........12
Removal and Installation of Hood Lock Control ......13
Hood Lock Control Inspection .................................14
POWER DOOR LOCK SYSTEM ........................15
Component Parts and Harness Connector Loca-
tion ..........................................................................
15
System Description .................................................15
Schematic ...............................................................18
Wiring Diagram - D/LOCK - .....................................19
Terminal and Reference Value for BCM .................23
Work Flow ...............................................................23
CONSULT-II Function (BCM) ..................................24
Trouble Diagnosis Symptom Chart .........................25
BCM Power Supply and Ground Circuit Inspection
....
25
Door Switch Check ..................................................25
Key Switch (Insert) Check .......................................27
Door Lock/Unlock Switch Check .............................28
Glass Hatch Switch Circuit Inspection ....................30
Front Door Lock Assembly LH (Actuator) Check ....32
Front Door Lock Actuator RH Check .......................32
Rear Door Lock Actuator RH/LH Check ..................33
Glass Hatch Lock Actuator Check ...........................34
Front Door Lock Assembly LH (Key Cylinder
Switch) Check ..........................................................
35
REMOTE KEYLESS ENTRY SYSTEM .............37
Component Parts and Harness Connector Loca-
tion ...........................................................................
37
System Description ..................................................37
CAN Communication System Description ...............40
Schematic ................................................................41
Wiring Diagram - KEYLES - ....................................42
Terminal and Reference Value for BCM ..................44
Terminal and Reference Value for IPDM E/R ..........44
CONSULT-II Function (BCM) ..................................45
CONSULT-II Start Procedure ..................................45
CONSULT-II Application Item ..................................45
Trouble Diagnosis Procedure ..................................47
BCM Power Supply and Ground Circuit Inspection
....
47
Trouble Diagnosis ....................................................47
Key Switch (Insert) Check .......................................49
Door Switch Check ..................................................49
Keyfob Battery and Function Check ........................52
Remote Keyless Entry Receiver System Inspec-
tion ...........................................................................
53
ACC Power Check ...................................................54
IPDM E/R Operation Check .....................................54
Check Hazard Function ...........................................55
Check Horn Function ...............................................55
Check Headlamp Function ......................................55
Check Map Lamp Illumination Function ..................56
ID Code Entry Procedure ........................................56
Keyfob Battery Replacement ...................................59
VEHICLE SECURITY (THEFT WARNING)
SYSTEM ............................................................
60
Component Parts and Harness Connector Loca-
tion ...........................................................................
60
System Description ..................................................61

BL-2
CAN Communication System Description ..............63
Schematic ...............................................................64
Wiring Diagram - VEHSEC - ...................................65
Terminal and Reference Value for BCM .................69
Terminal and Reference Value for IPDM E/R .........69
CONSULT-II Function (BCM) .................................70
Trouble Diagnosis ...................................................71
Preliminary Check ..................................................72
Symptom Chart .......................................................72
Door Switch Check .................................................73
Hood Switch Check ................................................75
Combination Meter (Security Indicator Lamp)
Check .....................................................................
76
Front Door Lock Assembly LH (Key Cylinder
Switch) Check .........................................................
77
Vehicle Security Horn Alarm Check .......................79
Vehicle Security Headlamp Alarm Check ...............79
Door Lock/Unlock Switch Check ............................79
AUTOMATIC BACK DOOR SYSTEM ...............80
Component Parts and Harness Connector Loca-
tion ..........................................................................
80
System Description .................................................80
Schematic ...............................................................85
Wiring Diagram - B/CLOS - ....................................86
Back Door Control Unit Harness Connector Termi-
nal Layout ...............................................................
91
Terminal and Reference Value for Back Door
Control Unit .............................................................
91
Terminal and Reference Value for BCM .................92
Trouble Diagnosis Procedure .................................92
Self-Diagnosis Procedure .......................................93
Diagnosis Chart ......................................................94
Back Door Power Supply and Ground Circuit In-
spection ..................................................................
95
Power Liftgate Switch System Inspection ...............95
Back Door Close (Close) Switch System Inspec-
tion ..........................................................................
98
Back Door Close (Cancel) Switch System Inspec-
tion ..........................................................................
99
Pinch Strip System Inspection ...............................100
Back Door Warning Chime System Inspection ......101
Half-Latch Switch System Inspection ....................101
Open Switch System Inspection ............................102
Close Switch System Inspection ...........................103
Back Door Handle Switch System Inspection .......104
Cinch Latch Motor System Inspection ...................105
DOOR ...............................................................106
Fitting Adjustment ..................................................106
Removal and Installation .......................................107
FRONT DOOR LOCK .......................................110
Component Structure ............................................110
Removal and Installation .......................................110
Disassembly and Assembly ..................................112
REAR DOOR LOCK .........................................113
Component Structure ............................................113
Removal and Installation .......................................113
BACK DOOR LOCK .........................................114
Power Back Door Opener .....................................114
Door Lock Assembly .............................................115
IVIS (INFINITI VEHICLE IMMOBILIZER SYS-
TEM-NATS) ......................................................
116
Component Parts and Harness Connector Loca-
tion ........................................................................
116
System Description ...............................................116
System Composition .............................................117
ECM Re-communicating Function ........................117
Wiring Diagram - NATS - ......................................119
Terminal and Reference Value for BCM ...............119
CONSULT-II ..........................................................119
Work Flow .............................................................123
Trouble Diagnosis .................................................123
Diagnosis Procedure 1 ..........................................125
Diagnosis Procedure 2 ..........................................126
Diagnosis Procedure 3 ..........................................127
Diagnosis Procedure 4 ..........................................128
Diagnosis Procedure 5 ..........................................129
Diagnosis Procedure 6 ..........................................131
How to Replace NATS Antenna Amp ...................132
HOMELINK UNIVERSAL TRANSCEIVER ......133
Wiring Diagram - TRNSCV - .................................133
Trouble Diagnosis .................................................133
CAB AND REAR BODY ...................................135
Body Mounting ......................................................135
BODY REPAIR .................................................136
Body Exterior Paint Color ......................................136
Body Component Parts .........................................137
Corrosion Protection .............................................142
Body Sealing .........................................................145
Body Construction .................................................149
Body Alignment .....................................................149
Handling Precaution for Plastics ...........................164
Precaution in Repairing High Strength Steel ........167
Foam Repair .........................................................169
Replacement Operation ........................................170

HOOD
BL-11
< SERVICE INFORMATION >
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HOOD
Fitting AdjustmentINFOID:0000000003532891
CLEARANCE AND SURFACE HEIGHT ADJUSTMENT
1. Remove the front grille. Refer to EI-16.
1. Hood hinge 2. Hood stay 3. Hood lock assembly
4. Hood assembly 5. Front grille 6. Headlamp
7. Front fender 8. Front bumper fascia D. 8.0 mm (0.315 in)
E. 2.0 mm (0.079 in) F. 8.0 mm (0.315 in)
AWKIA0674ZZ

BL-12
< SERVICE INFORMATION >
HOOD
2. Remove the hood lock assembly and adjust the height by rotating the bumper rubber until the hood clear-
ance of hood and fender becomes 1 mm (0.04 in) lower than fitting standard dimension.
3. Temporarily tighten the hood lock, and position it by engaging it with the hood striker. Check the lock and
striker for looseness, and tighten the lock mounting bolt to the specified torque.
4. Adjust the clearance and surface height of hood and fender according to the fitting standard dimension by
rotating right and left bumper rubbers.
CAUTION:
Adjust right/left gap between hood and each part to the following specification.
5. Install the front grille. Refer to EI-16
.
HOOD LOCK ADJUSTMENT
1. Remove the front grille. Refer to EI-16.
2. Move the hood lock to the left or right so that striker center is vertically aligned with hood lock center
(when viewed from vehicle front).
3. Make sure the secondary latch is properly engaged with the sec-
ondary striker with hood's own weight by dropping it from
approx. 200 mm (7.87 in) height or by pressing it lightly approx.
3 kg (29 N, 7lb).
CAUTION:
Do not drop the hood from 300 mm (11.81 in) height or
higher.
4. After adjusting hood lock, tighten the lock bolts.
5. Install the front grille. Refer to EI-16
.
Removal and Installation of Hood AssemblyINFOID:0000000003532892
1. Support the hood striker with proper material to prevent it from
falling.
WARNING:
Body injury may occur if no supporting rod is holding the
hood open when removing the damper stay.
2. Remove the hinge nuts from the hood to remove the hood
assembly.
CAUTION:
Operate with two workers, because of its heavy weight.
Installation is in the reverse order of removal.Hood and headlamp (B–B) : Less than 2.0 mm
PIIA3806E
LIIA1443E