2005 INFINITI QX4 belt

EC-16Revision: October 2005
PRECAUTIONS
2005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UBS00KZ0
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.
On Board Diagnostic (OBD) System of Engine and A/TUBS00KZ1
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-67, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionUBS00KZ2

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned OFF.

Before removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF 2 89 H

EC-152Revision: October 2005
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
2005 QX56
15. DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.
>> GO TO 16.
16. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the
each indication is within the SP value.
OK or NG
OK >>INSPECTION END
NG >> Detect malfunctioning part according to EC-104, "
Symptom Matrix Chart" .
17. CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK >>INSPECTION END
NG (More than the SP value)>>GO TO 18.
NG (Less than the SP value)>>GO TO 25.
18. DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
–Engine oil level is too high
–Engine oil viscosity
–Belt tension of power steering, alternator, A/C compressor, etc. is excessive
–Noise from engine
–Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
–Valve clearance malfunction
–Intake valve timing control function malfunction
–Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 30.
19. CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.

Crushed air ducts

Malfunctioning seal of air cleaner element

Uneven dirt of air cleaner element

Improper specification of intake air system
OK or NG
OK >> GO TO 21.
NG >> Repair or replace malfunctioning part, and then GO TO 20.
PBIB2332E

EI-1
EXTERIOR & INTERIOR
I BODY
CONTENTS
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SECTION EI
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Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Service Notice .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
SQUEAK AND RATTLE TROUBLE DIAGNOSES ..... 5
Work Flow ................................................................ 5
CUSTOMER INTERVIEW ..................................... 5
DUPLICATE THE NOISE AND TEST DRIVE ....... 6
CHECK RELATED SERVICE BULLETINS ........... 6
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ...................................................... 6
REPAIR THE CAUSE ........................................... 6
CONFIRM THE REPAIR ....................................... 7
Generic Squeak and Rattle Troubleshooting ........... 7
INSTRUMENT PANEL .......................................... 7
CENTER CONSOLE ............................................. 7
DOORS ................................................................. 7
TRUNK .................................................................. 8
SUNROOF/HEADLINING ..................................... 8
OVERHEAD CONSOLE (FRONT AND REAR) ..... 8
SEATS ................................................................... 8
UNDERHOOD ....................................................... 8
Diagnostic Worksheet .............................................. 9
CLIP AND FASTENER ..............................................11
Description ..............................................................11
FRONT BUMPER ..................................................... 13
Removal and Installation ........................................ 13
REAR BUMPER ....................................................... 15
Removal and Installation ........................................ 15
FRONT GRILLE ........................................................ 17
Removal and Installation ........................................ 17
COWL TOP ............................................................... 18
Removal and Installation ........................................ 18
FRONT FENDER ...................................................... 20
Removal and Installation ........................................ 20OVER FENDER ......................................................... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21
INSTALLATION ................................................... 21
FENDER PROTECTOR ............................................ 23
Removal and Installation ........................................ 23
FRONT ................................................................ 23
LICENSE LAMP FINISHER ...................................... 24
Removal and Installation ........................................ 24
RUNNING BOARDS ................................................. 25
Removal and Installation ........................................ 25
REAR SPOILER ........................................................ 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSTALLATION ................................................... 26
ROOF RACK ............................................................. 27
Removal and Installation ........................................ 27
DOOR OUTSIDE MOLDING ..................................... 28
Removal and Installation ........................................ 28
............................................................................ 28
............................................................................ 29
SIDE GUARD MOLDING .......................................... 30
Removal and Installation ........................................ 30
REMOVAL ........................................................... 30
INSTALLATION ................................................... 30
DOOR FINISHER ...................................................... 32
Removal and Installation ........................................ 32
FRONT DOOR .................................................... 32
REAR DOOR ....................................................... 33
BODY SIDE TRIM ..................................................... 35
Removal and Installation ........................................ 35
LOWER DASH SIDE FINISHER ......................... 35
CENTER PILLAR LOWER FINISHER ................ 36
CENTER PILLAR UPPER FINISHER ................. 36
FRONT PILLAR FINISHER ................................. 36
KICKING PLATES ............................................... 36
MUDGUARD FINISHERS ................................... 36
DOOR PARTING SEALS .................................... 36
FLOOR TRIM ............................................................ 37
Removal and Installation ........................................ 37

PRECAUTIONS
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Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Service NoticeEIS004W7

When removing or installing various parts, place a cloth or padding on the vehicle body to prevent
scratches.

Handle trim, molding, instruments, grille, etc. carefully during removing or installing. Be careful not to soil
or damage them.

Apply sealing compound where necessary when installing parts.

When applying sealing compound, be careful that the sealing compound does not protrude from parts.

When replacing any metal parts (for example body outer panel, members, etc.), be sure to take rust pre-
vention measures.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EIS004W8
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.

EI-36
BODY SIDE TRIM
Revision: October 20052005 QX56
Installation is in the reverse order of removal.
CENTER PILLAR LOWER FINISHER
Removal and Installation
1. Remove front and rear door welts.
2. Remove seat belt anchor. Refer to SB-3, "
Removal and Installation of Front Seat Belt" .

On RH side, disconnect seat belt tension sensor.
3. Remove front and rear kicking plates. Refer to EI-36, "
KICKING PLATES" .
4. Remove center pillar lower finisher.
Installation is in the reverse order of removal.
CENTER PILLAR UPPER FINISHER
Removal and Installation
1. Remove center pillar lower finisher. Refer to EI-36, "CENTER PILLAR LOWER FINISHER" .
2. Remove assist grip.
3. Remove center pillar upper finisher.
Installation is in the reverse order of removal.
FRONT PILLAR FINISHER
Removal and Installation
1. Remove assist grip.
2. Remove front pillar finisher.
Installation is in the reverse order of removal.
KICKING PLATES
Removal and Installation
Release clips and remove front and/or rear kicking plates.
Installation is in the reverse order of removal.
MUDGUARD FINISHERS
Removal and Installation
Release clips and remove front and/or rear mudguard finishers.
Installation is in the reverse order of removal.
DOOR PARTING SEALS
Removal and Installation
1. Open front and/or rear doors fully.
2. Release clips and remove parting seals.
Installation is in the reverse order of removal.

FLOOR TRIM
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Revision: October 20052005 QX56
FLOOR TRIMPFP:74902
Removal and InstallationEIS004WS
1. Remove front seats. Refer to SE-97, "FRONT SEAT" .

Remove subwoofer. Refer to AV- 4 6 , "Removal and Installation of Subwoofer" .

Remove navigation display control unit. Refer to AV-158, "Removal and Installation of Display Control
Unit" .
2. Remove second row seats. Refer to SE-104, "
Second Row Outboard" and SE-104, "Second Row Cen-
ter" , if equipped.
3. Remove third row rear seat. Refer to SE-104, "
Third Row" .
4. Remove lower seat belt anchors. Refer to SB-3, "
SEAT BELTS" .
5. Remove lower body side trim. Refer to EI-35, "
BODY SIDE TRIM" .
6. Remove luggage lower side finishers (left / right). Refer to EI-40, "
LUGGAGE FLOOR TRIM" .
7. Remove kicking plates. Refer to EI-35, "
BODY SIDE TRIM" .
8. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
9. Remove rear console, if equipped. Refer to IP-17, "
Rear Console" .
10. Remove rear lower finisher. Refer to EI-40, "
LUGGAGE FLOOR TRIM" .
11. Remove carpet.
12. Remove floor mat hooks from front carpet.
Installation is in the reverse order of removal.
1. Inspection hole cover 2. Seal 3. Carpet
4. Floor mat hook 5. Plastic clip
WIIA0267E

LUGGAGE FLOOR TRIM
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Revision: October 20052005 QX56
REMOVAL
1. Remove 2nd and 3rd row seat belts. Refer to SB-3, "SEAT BELTS" .
2. Remove third row seat belt buckles.
3. Remove third row seat assembly. Refer to SE-104, "
Third Row" .
4. Remove back door weatherstrip. Refer to EI-42, "
BACK DOOR TRIM" .
5. Remove rear luggage room lamp. Refer to EI-38, "
HEADLINING" .

Disconnect harness from lamp.
6. Remove rear upper finisher. Refer to EI-38, "
HEADLINING" .
7. Remove rear door kicking plates. Refer to EI-35, "
BODY SIDE TRIM" .
8. Remove rear lower finisher.
9. Disconnect door open/close link. Refer to BL-135, "
BACK DOOR LOCK" .
10. Remove cargo net hooks.
11. Remove luggage side lower finishers LH/RH.

Disconnect power point, RH side.
12. Remove coat hooks.
13. Remove luggage side upper finishers LH/RH.

Disconnect harness to door open/close switch, LH side.
14. Remove tie down hooks LH/RH.
15. Remove floor side finishers LH/RH.
16. Remove luggage floor board.
17. Remove storage box.
18. Remove front luggage floor bracket.
19. Remove rear luggage box bracket.
INSTALLATION
Installation is in the reverse order of removal.
1. Rear lower finisher cap 2. Rear lower finisher 3. Cap upper seat belt finisher RH
4. Luggage side finisher RH 5. Metal clip 6. Plastic clip
7. Luggage side finisher lower RH 8. Luggage floor board 9. Latch luggage floor board
10. Leak check cap 11. Cup holder 12. Tie down hook
13. Floor side finisher RH 14. Power point assembly 15. Cargo net hook
16. Rear luggage box bracket 17. Front luggage floor bracket 18. Storage box
19. Floor side finisher LH 20. Luggage side finisher upper LH 21. Luggage side finisher lower LH
22. Lid luggage side lower 23. Coat hook 24. Cap lower seat belt finisher
25. Back door open/close switch 26. Cap luggage side upper 27. Cap upper seat belt finisher LH

EM-1
ENGINE MECHANICAL
B ENGINE
CONTENTS
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SECTION EM
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Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Precautions for Drain Engine Coolant ...................... 3
Precautions for Disconnecting Fuel Piping .............. 3
Precautions for Removal and Disassembly ............. 3
Precautions for Inspection, Repair and Replace-
ment ......................................................................... 3
Precautions for Assembly and Installation ............... 3
Parts Requiring Angular Tightening ......................... 3
Precautions for Liquid Gasket .................................. 4
REMOVAL OF LIQUID GASKET SEALING .......... 4
LIQUID GASKET APPLICATION PROCEDURE ..... 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 7
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 9
NVH Troubleshooting —Engine Noise ..................... 9
Use the Chart Below to Help You Find the Cause
of the Symptom. ..................................................... 10
ENGINE ROOM COVER ...........................................11
Removal and Installation .........................................11
REMOVAL ............................................................11
INSTALLATION ....................................................11
DRIVE BELTS ........................................................... 12
Checking Drive Belts .............................................. 12
Tension Adjustment ................................................ 12
Removal and Installation ........................................ 12
DRIVE BELT ....................................................... 12
INSTALLATION ................................................... 13
Drive Belt Auto Tensioner and Idler Pulley ............. 13
REMOVAL ........................................................... 13
INSTALLATION ................................................... 13
AIR CLEANER AND AIR DUCT ............................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14
INSTALLATION ................................................... 14
CHANGING AIR CLEANER FILTER ................... 14INTAKE MANIFOLD ................................................. 15
Removal and Installation ........................................ 15
REMOVAL ........................................................... 15
INSTALLATION ................................................... 17
INSPECTION AFTER INSTALLATION ................ 18
EXHAUST MANIFOLD AND THREE WAY CATA-
LYST .......................................................................... 19
Removal and Installation ........................................ 19
REMOVAL ........................................................... 19
INSPECTION AFTER REMOVAL ....................... 20
INSTALLATION ................................................... 20
OIL PAN AND OIL STRAINER ................................. 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSPECTION AFTER REMOVAL ....................... 23
INSTALLATION ................................................... 24
INSPECTION AFTER INSTALLATION ................ 25
IGNITION COIL ......................................................... 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSTALLATION ................................................... 26
SPARK PLUG (PLATINUM-TIPPED TYPE) ............. 27
Removal and Installation ........................................ 27
REMOVAL ........................................................... 27
INSPECTION AFTER REMOVAL ....................... 27
INSTALLATION ................................................... 28
FUEL INJECTOR AND FUEL TUBE ........................ 29
Removal and Installation ........................................ 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 30
INSPECTION AFTER INSTALLATION ................ 32
ROCKER COVER ..................................................... 33
Removal and Installation ........................................ 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 34
TIMING CHAIN .......................................................... 35
Removal and Installation ........................................ 35
REMOVAL ........................................................... 36
INSPECTION AFTER REMOVAL ....................... 38
INSTALLATION ................................................... 39