2007 INFINITI QX56 warning

LT-2
Wiring Diagram - F/FOG - ......................................51
Terminal and Reference Value for BCM .................52
Terminal and Reference Value for IPDM E/R .........52
How to Proceed with Trouble Diagnosis .................53
Preliminary Check ..................................................53
CONSULT-II Function for BCM ..............................53
CONSULT-II Function for IPDM E/R ......................53
Front Fog Lamps Do Not Illuminate (Both Sides) ...53
Front Fog Lamp Does Not Illuminate (One Side) ...54
Aiming Adjustment ..................................................55
Bulb Replacement ..................................................55
Removal and Installation ........................................56
TURN SIGNAL AND HAZARD WARNING
LAMPS ...............................................................
57
Component Parts and Harness Connector Loca-
tion ..........................................................................
57
System Description .................................................57
CAN Communication System Description ..............59
Schematic ...............................................................60
Wiring Diagram - TURN - ........................................61
Terminal and Reference Value for BCM .................63
How to Proceed with Trouble Diagnosis .................63
Preliminary Check ..................................................64
CONSULT-II Function (BCM) .................................64
Front Turn Signal Lamp Does Not Operate ............64
Door Mirror Turn Signal Lamp Does Not Operate ...65
Rear Turn Signal Lamp Does Not Operate ............66
Hazard Warning Lamp Does Not Operate But
Turn Signal Lamp Operatess ..................................
67
Turn Signal Indicator Lamp Does Not Operate ......68
Bulb Replacement ..................................................69
Removal and Installation ........................................69
LIGHTING AND TURN SIGNAL SWITCH .........70
Removal and Installation ........................................70
HAZARD SWITCH .............................................71
Removal and Installation ........................................71
COMBINATION SWITCH ..................................72
Wiring Diagram - COMBSW - .................................72
Combination Switch Reading Function ...................72
CONSULT-II Function (BCM) .................................73
Combination Switch Inspection ..............................73
Removal and Installation ........................................76
Switch Circuit Inspection ........................................76
STOP LAMP ......................................................77
System Description .................................................77
Wiring Diagram - STOP/L - .....................................78
Bulb Replacement ..................................................78
Removal and Installation ........................................79
BACK-UP LAMP ................................................80
Wiring Diagram - BACK/L - .....................................80
Bulb Replacement ..................................................80
Removal and Installation ........................................81
PARKING, LICENSE PLATE AND TAIL
LAMPS ...............................................................
82
Component Parts and Harness Connector Loca-
tion ..........................................................................
82
System Description .................................................82
CAN Communication System Description ..............83
Schematic ...............................................................84
Wiring Diagram - TAIL/L - .......................................85
Terminal and Reference Value for BCM .................87
Terminal and Reference Value for IPDM E/R .........87
How to Proceed with Trouble Diagnosis .................88
Preliminary Check ...................................................88
CONSULT-II Function for BCM ...............................88
CONSULT-II Function for IPDM E/R .......................88
Parking, License Plate and/or Tail Lamps Do Not
Illuminate .................................................................
88
Parking, License Plate and Tail Lamps Do Not
Turn OFF (After Approx. 10 Minutes) .....................
91
Bulb Replacement ...................................................91
Removal and Installation .........................................92
REAR COMBINATION LAMP ...........................93
Bulb Replacement ...................................................93
Removal and Installation .........................................93
TRAILER TOW ..................................................94
Component Parts and Harness Connector Loca-
tion ..........................................................................
94
System Description .................................................94
Schematic ...............................................................96
Wiring Diagram - T/TOW - ......................................97
INTERIOR ROOM LAMP ..................................101
Component Parts and Harness Connector Loca-
tion ........................................................................
101
System Description ...............................................101
Schematic .............................................................105
Wiring Diagram - INT/L - .......................................107
Terminal and Reference Value for BCM ...............113
How to Proceed with Trouble Diagnosis ...............113
Preliminary Check .................................................114
CONSULT-II Function (BCM) ...............................114
Room/Map Lamp Control Does Not Operate ........115
Personal Lamp Control Does Not Operate (Room/
Map Lamps Operate) ............................................
116
All Step/Foot/Puddle Lamps Do Not Operate .......117
All Interior Room Lamps Do Not Operate .............118
Ignition Keyhole Illumination Control Does Not
Operate .................................................................
118
ILLUMINATION ................................................120
Component Parts and Harness Connector Loca-
tion ........................................................................
120
System Description ...............................................120
CAN Communication System Description ............122
Schematic .............................................................123
Wiring Diagram - ILL - ...........................................126
Removal and Installation of Illumination Control
Switch ...................................................................
136

LT-4
< SERVICE INFORMATION >
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003533330
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.
WARNING:
• 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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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 har-
ness connectors.
General precautions for service operationsINFOID:0000000003533331
• Never work with wet hands.
• Xenon headlamp includes high voltage generating part. Be sure to
disconnect battery negative cable (negative terminal) or power
fuse before removing, installing, or touching the xenon headlamp
(including lamp bulb).
• Turn the lighting switch OFF before disconnecting and connecting
the connector.
• When turning the xenon headlamp on and while it is illuminated,
never touch the harness, bulb, and socket of the headlamp.
• When checking the headlamp on/off operation, check it on vehicle
and with the power connected to the vehicle-side connector.
• Do not touch the headlamp bulb glass surface with bare hands or
allow oil or grease to get on it. Do not touch the headlamp bulb just after the headlamp is turned off, because
it is very hot.
• Install the xenon headlamp bulb socket correctly. If it is installed
improperly, high-voltage leak or corona discharge may occur that
can melt the bulb, connector, and housing. Do not illuminate the
xenon headlamp bulb out of the headlamp housing. Doing so can
cause fire and harm your eyes.
• When the bulb has burned out, wrap it in a thick vinyl bag and dis-
card. Do not break the bulb.
• Leaving the bulb removed from the headlamp housing for a long
period of time can deteriorate the performance of the lens and
reflector (dirt, clouding). Always prepare a new bulb and have it on
hand when replacing the bulb.
• Do not use organic solvent (paint thinner or gasoline) to clean
lamps and to remove old sealant.
WKIA0460E
EL-3422D

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-57
< SERVICE INFORMATION >
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TURN SIGNAL AND HAZARD WARNING LAMPS
Component Parts and Harness Connector LocationINFOID:0000000003533403
System DescriptionINFOID:0000000003533404
OUTLINE
Power is supplied at all times
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM (body control module) terminal 70, and
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to combination meter terminal 8.
TURN SIGNAL OPERATION
When the ignition switch is in the ON or START position, power is supplied
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38, and
• through 10A fuse [No. 14, located in the fuse block (J/B)]
• to combination meter terminal 24.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminal 17
• through grounds M57, M61 and M79.
LH Turn
When the turn signal switch is moved to the left position, the BCM, interpreting it as turn signal is ON, outputs
turn signal from BCM terminal 60.
The BCM supplies power
• through BCM terminal 60
• to front turn/fog lamp LH terminal 2
• through front turn/fog lamp LH terminal 3
• to grounds E9, E15 and E24,
• to door mirror LH terminal 15
• through door mirror LH terminal 11
• to grounds M57, M61 and M79 and
WKIA3554E

LT-58
< SERVICE INFORMATION >
TURN SIGNAL AND HAZARD WARNING LAMPS
• to rear combination lamp LH terminal 4
• through rear combination signal lamp LH terminal 6
• to grounds B7 and B19.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamp within combination meter.
RH Turn
When the turn signal switch is moved to the right position, the BCM, interpreting it as turn signal is ON, outputs
turn signal from BCM terminal 61.
The BCM supplies power
• through BCM terminal 61
• to front turn/fog lamp RH terminal 2
• through front turn/fog lamp RH terminal 3
• to grounds E9, E15 and E24,
• to door mirror RH terminal 15
• through door mirror RH terminal 11
• to grounds M57, M61 and M79 and
• to rear combination lamp RH terminal 4
• through rear combination lamp terminal 6
• to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamp within combination meter.
HAZARD LAMP OPERATION
Power is supplied at all times
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70, and
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to combination meter terminal 8.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminal 17
• through grounds M57, M61 and M79.
When the hazard switch is depressed, ground is supplied
• to BCM terminal 29
• through hazard switch terminal 2
• through hazard switch terminal 1
• through grounds M57, M61 and M79.
When the hazard switch is depressed, the BCM, interpreting it as hazard warning lamps are ON, outputs turn
signal from BCM terminals 60 and 61.
The BCM supplies power
• through BCM terminals 60 and 61
• to front turn/fog lamp LH and RH terminal 2
• through front turn/fog lamp LH and RH terminal 3
• to grounds E9, E15 and E24,
• to door mirror LH and RH terminal 15
• through door mirror LH and RH terminal 11
• to grounds M57, M61 and M79,
• to rear turn signal lamp LH terminal 1
• through rear turn signal lamp LH terminal 3
• to grounds B7 and B19, and
• to rear turn signal lamp RH terminal 4
• through rear turn signal lamp RH terminal 6
• to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamps within combination meter.
REMOTE KEYLESS ENTRY SYSTEM OPERATION
Power is supplied at all times
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70, and
• through 10A fuse [No. 19, located in the fuse block (J/B)]

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-59
< SERVICE INFORMATION >
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• to combination meter terminal 8.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminal 17
• through grounds M57, M61 and M79.
When the remote keyless entry system is triggered by input from the keyfob, the BCM, interpreting it as turn
signal is ON, outputs turn signal from BCM terminals 60 and 61.
The BCM supplies power
• through BCM terminals 60 and 61
• to front turn/fog lamp LH and RH terminal 2
• through front turn/fog lamp LH and RH terminal 3
• to grounds E9, E15 and E24,
• to door mirror LH and RH terminal 15
• through door mirror LH and RH terminal 11
• to grounds M57, M61 and M79,
• to rear turn signal lamp LH terminal 1
• through rear turn signal lamp LH terminal 3
• to grounds B7 and B19, and
• to rear turn signal lamp RH terminal 4
• through rear turn signal lamp RH terminal 6
• to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamps within combination meter.
With power and input supplied, the BCM controls the flashing of the hazard warning lamps when keyfob is
used to activate the remote keyless entry system.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "System Description".
CAN Communication System DescriptionINFOID:0000000003533405
Refer to LAN-4, "CAN Communication System".

LT-60
< SERVICE INFORMATION >
TURN SIGNAL AND HAZARD WARNING LAMPS
Schematic
INFOID:0000000003533406
WKWA3654E

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-61
< SERVICE INFORMATION >
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Wiring Diagram - TURN -INFOID:0000000003533407
WKWA3655E

LT-62
< SERVICE INFORMATION >
TURN SIGNAL AND HAZARD WARNING LAMPS
WKWA3656E