2005 INFINITI QX4 belt

PRECAUTIONS
LAN-3
[CAN]
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LAN
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UKS0017I
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.
WA RN ING:

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.
Precautions When Using CONSULT-IIUKS0017J
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
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 carry out CAN communication.
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
–If YES, GO TO 2.
–If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
–If YES, GO TO 3.
–If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica-
tion. Therefore, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to LAN-5, "
CAN Communication Unit" .
Precautions For Trouble DiagnosisUKS0017K
CAN SYSTEM

Do not apply voltage of 7.0V or higher to the measurement terminals.

Use the tester with its open terminal voltage being 7.0V or less.

Be sure to turn ignition switch off and disconnect negative battery terminal before checking the circuit.

LT-1
LIGHTING SYSTEM
K ELECTRICAL
CONTENTS
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SECTION LT
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LT
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
General precautions for service operations ............. 4
Wiring Diagrams and Trouble Diagnosis .................. 4
HEADLAMP (FOR USA) ............................................ 6
Component Parts and Harness Connector Location ..... 6
System Description .................................................. 6
OUTLINE ............................................................... 6
XENON HEADLAMP ............................................. 7
BATTERY SAVER CONTROL .............................. 8
AUTO LIGHT OPERATION ................................... 8
VEHICLE SECURITY SYSTEM (PANIC ALARM) ..... 8
CAN Communication System Description ................ 8
Schematic ................................................................ 9
Wiring Diagram — H/LAMP — ............................... 10
Terminals and Reference Values for BCM ............. 14
Terminals and Reference Values for IPDM E/R ..... 15
How to Proceed With Trouble Diagnosis ................ 15
Preliminary Check .................................................. 15
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 15
CONSULT-II Function (BCM) ................................. 17
CONSULT-II OPERATION .................................. 17
WORK SUPPORT ............................................... 18
DATA MONITOR ................................................. 18
ACTIVE TEST ..................................................... 19
SELF-DIAGNOSTIC RESULTS .......................... 19
CONSULT-II Function (IPDM E/R) ......................... 20
CONSULT-II OPERATION .................................. 20
DATA MONITOR ................................................. 21
ACTIVE TEST ..................................................... 21
Headlamp HI Does Not Illuminate (Both Sides) ..... 22
Headlamp HI Does Not Illuminate (One Side) ....... 24
High Beam Indicator Lamp Does Not Illuminate .... 25
Headlamp LO Does Not Illuminate (Both Sides) .... 25
Headlamp LO Does Not Illuminate (One Side) ...... 27
Headlamps Do Not Turn OFF ................................ 28
Aiming Adjustment ................................................. 30LOW BEAM AND HIGH BEAM ........................... 30
Bulb Replacement .................................................. 31
HEADLAMP (OUTER SIDE), FOR LOW BEAM ... 31
HEADLAMP (INNER SIDE), FOR HIGH BEAM ... 31
FRONT PARKING LAMP (INNER OR OUTER) ... 31
FRONT SIDE MARKER LAMP ........................... 31
Removal and Installation ........................................ 32
REMOVAL ........................................................... 32
INSTALLATION ................................................... 32
Disassembly and Assembly .................................... 32
HEADLAMP (FOR CANADA) - DAYTIME LIGHT
SYSTEM - .................................................................. 33
Component Parts and Harness Connector Location ... 33
System Description ................................................. 34
OUTLINE ............................................................. 34
DAYTIME LIGHT OPERATION ........................... 34
COMBINATION SWITCH READING FUNCTION ... 34
AUTO LIGHT OPERATION ................................. 35
CAN Communication System Description .............. 35
Schematic ............................................................... 36
Wiring Diagram — DTRL — ................................... 37
Terminals and Reference Values for BCM .............. 41
How to Proceed With Trouble Diagnosis ................ 42
Preliminary Check .................................................. 42
CHECK BCM CONFIGURATION ........................ 42
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 42
INSPECTION PARKING BRAKE SWITCH CIR-
CUIT .................................................................... 43
CONSULT-II Functions ........................................... 44
Daytime Light Control Does Not Operate Properly
(Normal Headlamps Operate Properly) .................. 44
Aiming Adjustment .................................................. 46
Bulb Replacement .................................................. 46
Removal and Installation ........................................ 46
Disassembly and Assembly .................................... 46
AUTO LIGHT SYSTEM ............................................. 47
Component Parts and Harness Connector Location ... 47
System Description ................................................. 48
OUTLINE ............................................................. 48

LT-4
PRECAUTIONS
Revision: October 20052005 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.
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.
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.
Wiring Diagrams and Trouble DiagnosisEKS00B7R
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" in GI section.

Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution in PG section.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
WKIA0460E
EL-3422D

LU-10Revision: October 2005
OIL FILTER
2005 QX56
OIL FILTERPFP:15208
Removal and InstallationEBS00LMU
REMOVAL
1. Remove the engine front undercover using power tool.
2. Remove the oil filter using Tool.
CAUTION:

The oil filter is provided with a relief valve.
Use Genuine NISSAN oil filter or equivalent.

Be careful not to get burned when the engine and engine
oil are hot.

When removing, prepare a shop cloth to absorb any
engine oil leakage or spillage.

Do not allow engine oil to adhere to the drive belts.

Completely wipe off any engine oil that adheres to the engine and the vehicle.
INSTALLATION
1. Remove foreign materials adhering to the oil filter installation surface.
2. Apply engine oil to the oil seal circumference of the new oil filter.
3. Screw the oil filter manually until it touches the installation sur-
face, then tighten it by 2/3 turn. Or tighten to specification.
4. Inspect the engine for oil leakage. Refer to LU-10, "
INSPEC-
TION AFTER INSTALLATION" .
5. Install the engine front undercover using power tool.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level. Refer to LU-7, "OIL LEVEL" .
2. Start the engine and check for engine oil leakage.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and add engine oil as required.Tool number : KV10115801 (J-38956)
WBIA0388E
SM A01 0
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SM A22 9B

OIL COOLER
LU-11
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LU
Revision: October 20052005 QX56
OIL COOLERPFP:21305
Removal and InstallationEBS00LMV
WA RN ING:
Be careful not to burn yourself, as the engine oil and engine coolant are hot.
REMOVAL
1. Remove engine front undercover using power tool.
2. Disconnect water hoses, pinching hoses near oil cooler to prevent engine coolant from spilling.
CAUTION:
Do not spill engine coolant on the drive belt.
3. Remove oil filter. Refer to LU-10, "
Removal and Installation" .
CAUTION:
Do not spill engine oil on the drive belts.
4. Remove connector bolt, and remove oil cooler.
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks. Check oil cooler for clogging by blowing compressed air through engine coolant
inlet. If necessary, replace oil cooler assembly.
Relief Valve
Inspect relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove
valve by prying it out using a suitable tool. Install a new valve in place by tapping it.
WBIA0414E
1. Oil pan 2. Water hose 3. Water pipe
4. Water hose 5. Oil cooler bolt 6. Oil filter
7. Oil cooler 8. O-ring 9. Relief valve
10. Water hose 11. Connector pipe 12. Gasket

MA-1
MAINTENANCE
L MAINTENANCE
CONTENTS
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SECTION MA
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MA
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tool ......................................... 4
GENERAL MAINTENANCE ....................................... 5
General Maintenance ............................................... 5
PERIODIC MAINTENANCE ....................................... 7
Introduction of Periodic Maintenance ....................... 7
Maintenance For Off-road Driving (4WD only) ......... 7
Schedule 1 ............................................................... 7
EMISSION CONTROL SYSTEM MAINTE-
NANCE .................................................................. 7
CHASSIS AND BODY MAINTENANCE ............... 8
Schedule 2 ............................................................... 9
EMISSION CONTROL SYSTEM MAINTE-
NANCE .................................................................. 9
CHASSIS AND BODY MAINTENANCE ............. 10
RECOMMENDED FLUIDS AND LUBRICANTS .......11
Fluids and Lubricants ..............................................11
SAE Viscosity Number ........................................... 12
GASOLINE ENGINE OIL .................................... 12
ANTI-FREEZE COOLANT MIXTURE RATIO ..... 12
ENGINE MAINTENANCE ......................................... 13
Checking Drive Belts .............................................. 13
DRIVE BELT TENSION ...................................... 13
Changing Engine Coolant ...................................... 13
DRAINING ENGINE COOLANT ......................... 13
REFILLING ENGINE COOLANT ........................ 14
FLUSHING COOLING SYSTEM ......................... 15
Checking Fuel Lines ............................................... 16
Changing Fuel Filter ............................................... 16
Changing Engine Air Cleaner Filter ........................ 16
VISCOUS PAPER TYPE ..................................... 16
Changing Engine Oil .............................................. 17
Changing Oil Filter ................................................. 17
REMOVAL ........................................................... 17
INSTALLATION ................................................... 17INSPECTION AFTER INSTALLATION ................ 18
Changing Spark Plugs ............................................ 18
REMOVAL ........................................................... 19
INSPECTION AFTER REMOVAL ....................... 19
INSTALLATION ................................................... 20
Checking EVAP Vapor Lines .................................. 20
CHASSIS AND BODY MAINTENANCE ................... 21
Changing In-cabin Microfilter .................................. 21
Checking Exhaust System ...................................... 22
Checking A/T Fluid ................................................. 22
Changing A/T Fluid ................................................. 24
Changing Transfer Fluid ......................................... 24
DRAINING ........................................................... 24
FILLING ............................................................... 25
Checking Transfer Fluid ......................................... 25
FLUID LEAKAGE AND FLUID LEVEL ................ 25
Checking Propeller Shaft ........................................ 25
Checking Final Drive Oil ......................................... 25
Changing Final Drive Oil ......................................... 25
Balancing Wheels ................................................... 26
REMOVAL ........................................................... 26
WHEEL BALANCE ADJUSTMENT ..................... 26
Tire Rotation ........................................................... 28
Checking Brake Fluid Level and Leaks .................. 28
Checking Brake Lines and Cables ......................... 28
Checking Disc Brake .............................................. 28
ROTOR ................................................................ 28
CALIPER ............................................................. 29
PAD ..................................................................... 29
Checking Steering Gear and Linkage ..................... 29
STEERING GEAR ............................................... 29
STEERING LINKAGE ......................................... 29
Checking Power Steering Fluid and Lines .............. 29
CHECKING FLUID LEVEL .................................. 29
CHECKING LINES .............................................. 30
Checking Axle and Suspension Parts .................... 30
FRONT AND REAR AXLE AND SUSPENSION
PARTS ................................................................. 30
DRIVE SHAFT ..................................................... 30

MA-2Revision: October 20052005 QX56 Lubricating Locks, Hinges and Hood Latches ........ 31
Checking Seat Belts, Buckles, Retractors, Anchors and Adjusters ..........................................................32

PRECAUTIONS
MA-3
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MA
B
MA
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ELS001BF
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.
WA RN ING:

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.