warning INFINITI QX56 2006 Factory Service Manual

CAN COMMUNICATIONLAN-37
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Revision: November 2009 2006 QX56
Fuel level low warning signalT R
Fuel level sensor signal RT
Parking brake switch signal TR
Stop lamp switch signal RTR
Tow mode switch signal RT
Vehicle speed signal RR
RT
RRR R T RR
A/C switch/indicator signal TR
RT
A/C switch signal RTR
Blower fan motor switch signal RT
Day time running light request signal TR
Door switch signal R R R TR
Front fog light request signal TR
Front wiper request signal RT R
High beam request signal RT R
High beam status signal R T
Horn chirp signal TR
Ignition switch signal RT R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Low beam status signal R T
Position light request signal RT R
Rear window defogger switch signal TR R
Sleep wake up signal R RT R
Theft warning horn request signal TR
Tire pressure data signal R T
Tire pressure signal RT
Turn indicator signal RT
Steering angle sensor signal TR
ABS malfunction signal RT
ABS warning lamp signal RT
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R

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*1: with ICC model only
Brake pressure sensor signal
RT
Brake warning lamp signal RT
SLIP indicator lamp signal RT
TCS malfunction signal RT
VDC malfunction signal RT
VDC OFF indicator lamp signal RR T
VDC operation signal RT
Front wiper stop position signal RT
Hood switch signal RT
Rear window defogger control signal RR T
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R

LT-2Revision: November 20092006 QX56
System Description ..............................................
... 48
OUTLINE .......................................................... ... 48
COMBINATION SWITCH READING FUNCTION ... 48
EXTERIOR LAMP BATTERY SAVER CONTROL ... 48
DELAY TIMER FUNCTION .............................. ... 48
CAN Communication System Description ........... ... 48
Major Components and Functions ....................... ... 48
Schematic ............................................................ ... 49
Wiring Diagram — AUTO/L — ............................. ... 50
Terminals and Reference Values for BCM ........... ... 53
Terminals and Reference Values for IPDM E/R ... ... 54
How to Proceed With Trouble Diagnosis ............. ... 55
Preliminary Check ............................................... ... 55
SETTING CHANGE FUNCTIONS .................... ... 55
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ................................................................. ... 55
CONSULT-II Function (BCM) ............................... ... 57
CONSULT-II OPERATION ................................ ... 57
WORK SUPPORT ............................................ ... 58
DATA MONITOR ............................................... ... 58
ACTIVE TEST .................................................. ... 59
SELF-DIAGNOSTIC RESULTS ........................ ... 59
CONSULT-II Function (IPDM E/R) ....................... ... 60
CONSULT-II OPERATION ................................ ... 60
DATA MONITOR ............................................... ... 61
ACTIVE TEST .................................................. ... 61
Trouble Diagnosis Chart by Symptom ................. ... 62
Lighting Switch Inspection ................................... ... 62
Optical Sensor System Inspection ....................... ... 63
Optical Sensor ..................................................... ... 64
REMOVAL AND INSTALLATION ...................... ... 64
HEADLAMP AIMING CONTROL ........................... ... 65
System Description .............................................. ... 65
Wiring Diagram — H/AIM — ................................ ... 66
Headlamp Aiming Switch ..................................... ... 68
REMOVAL AND INSTALLATION ...................... ... 68
Switch Circuit Inspection ..................................... ... 68
FRONT FOG LAMP ............................................... ... 69
Component Parts and Harness Connector Location ... 69
System Description .............................................. ... 69
OUTLINE .......................................................... ... 69
COMBINATION SWITCH READING FUNCTION ... 70
EXTERIOR LAMP BATTERY SAVER CONTROL ... 70
CAN Communication System Description ........... ... 70
Wiring Diagram — F/FOG — ............................... ... 71
Terminals and Reference Values for BCM ........... ... 73
Terminals and Reference Values for IPDM E/R ... ... 74
How to Proceed With Trouble Diagnosis ............. ... 74
Preliminary Check ............................................... ... 75
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ................................................................. ... 75
CONSULT-II Functions ........................................ ... 76
Front Fog Lamps Do Not Illuminate (Both Sides) ... 76
Front Fog Lamp Does Not Illuminate (One Side) ... 77
Aiming Adjustment ............................................... ... 78
Bulb Replacement ............................................... ... 79
FRONT FOG LAMP .......................................... ... 79INSTALLATION ................................................
... 79
Removal and Installation ...................................... ... 79
FRONT FOG LAMP .......................................... ... 79
INSTALLATION ................................................ ... 79
TURN SIGNAL AND HAZARD WARNING LAMPS ... 80
Component Parts and Harness Connector Location ... 80
System Description .............................................. ... 80
OUTLINE .......................................................... ... 80
TURN SIGNAL OPERATION ............................ ... 80
HAZARD LAMP OPERATION .......................... ... 81
REMOTE KEYLESS ENTRY SYSTEM OPERA-
TION ................................................................. ... 82
COMBINATION SWITCH READING FUNCTION ... 82
CAN Communication System Description ........... ... 82
Schematic ............................................................ ... 83
Wiring Diagram — TURN — ................................ ... 84
Terminals and Reference Values for BCM ........... ... 87
How to Proceed With Trouble Diagnosis ............. ... 88
Preliminary Check ................................................ ... 89
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................. ... 89
CONSULT-II Function (BCM) ............................... ... 90
CONSULT-II OPERATION ................................ ... 90
DATA MONITOR ............................................... ... 91
ACTIVE TEST ................................................... ... 91
Front Turn Signal Lamp Does Not Operate ......... ... 92
Door Mirror Turn Signal Lamp Does Not Operate ... 93
Rear Turn Signal Lamp Does Not Operate .......... ... 94
Hazard Warning Lamp Does Not Operate But Turn
Signal Lamps Operate ......................................... ... 95
Turn Signal Indicator Lamp Does Not Operate .... ... 96
Bulb Replacement ................................................ ... 97
TURN SIGNAL LAMP (FRONT) ....................... ... 97
TURN SIGNAL LAMP (REAR) .......................... ... 97
Removal and Installation ...................................... ... 97
FRONT TURN SIGNAL LAMP .......................... ... 97
REAR TURN SIGNAL LAMP ............................ ... 97
LIGHTING AND TURN SIGNAL SWITCH ............. ... 98
Removal and Installation ...................................... ... 98
REMOVAL ........................................................ ... 98
INSTALLATION ................................................ ... 98
HAZARD SWITCH .................................................. ... 99
Removal and Installation ...................................... ... 99
REMOVAL ........................................................ ... 99
INSTALLATION ................................................ ... 99
COMBINATION SWITCH ....................................... .100
Wiring Diagram — COMBSW — ......................... .100
Combination Switch Reading Function ................ .101
CONSULT-II Function (BCM) ............................... .101
CONSULT-II OPERATION ................................ .101
DATA MONITOR ............................................... .102
Combination Switch Inspection ............................ .103
Removal and Installation ...................................... .105
Switch Circuit Inspection ...................................... .105
STOP LAMP ........................................................... .106
System Description .............................................. .106
Wiring Diagram — STOP/L — ............................. .107
Bulb Replacement ................................................ .108
HIGH-MOUNTED STOP LAMP ........................ .108

LT-4
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS00B7P
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 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.
General precautions for service operationsEKS00B7Q

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 connect-
ing 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 vehi-
cle 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
discard. 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
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LT-80
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
TURN SIGNAL AND HAZARD WARNING LAMPSPFP:26120
Component Parts and Harness Connector LocationEKS00B9P
System DescriptionEKS00B9Q
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
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through front turn/fog lamp LH terminal 3

to grounds E9, E15 and E24, and

to door mirror LH terminal 15

through door mirror LH terminal 11

to grounds M57, M61 and M79 and

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, and

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, and

to door mirror LH and RH terminal 15

LT-82
TURN SIGNAL AND HAZARD WARNING LAMPS
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through door mirror LH and RH terminal 11

to grounds M57, M61 and M79 and

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)]

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, and

to door mirror LH and RH terminal 15

through door mirror LH and RH terminal 11

to grounds M57, M61 and M79 and

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, "COMBINATION SWITCH READING FUNCTION" .
CAN Communication System DescriptionEKS00B9R
Refer to LAN-26, "CAN COMMUNICATION" .

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SchematicEKS00GGR
WKWA3654E

LT-84
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
Wiring Diagram — TURN —EKS00B9S
WKWA3655E

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