2005 INFINITI QX4 check oil

FSU-10
COIL SPRING AND SHOCK ABSORBER
Revision: October 20052005 QX56
COIL SPRING AND SHOCK ABSORBERPFP:56210
Removal and InstallationEES001GK
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove the shock absorber lower bolt using power tool.
3. Remove the three shock absorber upper mounting nuts using
power tool.
4. Remove the coil spring and shock absorber assembly.

Turn steering knuckle out to gain enough clearance for
removal.
INSTALLATION
Installation is in the reverse order of removal.

The step in the shock absorber assembly lower seat faces outside of vehicle.

Tighten all nuts and bolts to specification. Refer to FSU-5, "Components" .

When installing wheel and tire, refer to WT-7, "Rotation" .
Disassembly and AssemblyEES001GL
DISASSEMBLY
1. Set the shock absorber in a vise, then loosen (without removing)
the piston rod lock nut as shown.
CAUTION:
Do not remove piston rod lock nut at this time.
2. Compress the spring using commercial service tool until the
shock absorber mounting insulator can be turned by hand.
WAR NIN G:
Make sure that the pawls of the two spring compressors are
firmly hooked on the spring. The spring compressors must
be tightened alternately and evenly so as not to tilt the
spring.
3. Remove the piston rod lock nut.

Discard the piston rod lock nut, use a new nut for assembly.
INSPECTION AFTER DISASSEMBLY
Shock Absorber Assembly

Check for smooth operation through a full stroke, both compression and extension.

Check for oil leakage on welded or gland packing portions.

Check piston rod for cracks, deformation or other damage and replace if necessary.
Mounting Insulator and Rubber Parts
Check cemented rubber-to-metal portion for separation or cracks. Check rubber parts for deterioration and
replace if necessary.
LEIA0093E
SSU0 02
SSU0 03

COIL SPRING AND SHOCK ABSORBER
FSU-11
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Coil Spring

Check for cracks, deformation or other damage and replace if necessary.

Check the free spring height.
ASSEMBLY
1. When installing coil spring on shock absorber, it must be posi-
tioned as shown.
2. Install upper mounting insulator as shown in line with lower
shock absorber mount and step in shock absorber lower seat.

The step in the shock absorber lower seat faces outside of
vehicle.
3. Tighten the piston rod lock nut to specification. Refer to FSU-5,
"Components" .

Use a new piston rod lock nut for assembly.Front spring free height
4x2 : 325.5 ± 3 mm (12.8 ± 0.1 in)
4x4 : 335.0 ± 3 mm (13.2 ± 0.1 in)
SFA508A
WEIA0093E

GI-1
GENERAL INFORMATION
A GENERAL INFORMATION
CONTENTS
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SECTION GI
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Description ............................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS) (If
Equipped) ................................................................. 3
General Precautions ................................................ 4
Precautions for Three Way Catalyst ......................... 5
Precautions for Fuel (Unleaded Regular Gasoline
Recommended) ........................................................ 5
Precautions for Multiport Fuel Injection System or
Engine Control System ............................................ 6
Precautions for Hoses .............................................. 6
HOSE REMOVAL AND INSTALLATION ............... 6
HOSE CLAMPING ................................................ 6
Precautions for Engine Oils ...................................... 7
HEALTH PROTECTION PRECAUTIONS ............. 7
ENVIRONMENTAL PROTECTION PRECAU-
TIONS ................................................................... 7
Precautions for Air Conditioning ............................... 7
HOW TO USE THIS MANUAL ................................... 8
Description ............................................................... 8
Terms ....................................................................... 8
Units ......................................................................... 8
Contents ................................................................... 8
Relation between Illustrations and Descriptions ...... 9
Components ............................................................. 9
SYMBOLS ........................................................... 10
How to Follow Trouble Diagnoses ...........................11
DESCRIPTION .....................................................11
HOW TO FOLLOW TEST GROUPS IN TROU-
BLE DIAGNOSES ................................................11
HARNESS WIRE COLOR AND CONNECTOR
NUMBER INDICATION ....................................... 12
KEY TO SYMBOLS SIGNIFYING MEASURE-
MENTS OR PROCEDURES ............................... 13
How to Read Wiring Diagrams ............................... 15
CONNECTOR SYMBOLS ................................... 15SAMPLE/WIRING DIAGRAM - EXAMPL - .......... 16
DESCRIPTION .................................................... 17
Abbreviations .......................................................... 22
SERVICE INFORMATION FOR ELECTRICAL INCI-
DENT ......................................................................... 24
How to Check Terminal ........................................... 24
CONNECTOR AND TERMINAL PIN KIT ............ 24
HOW TO PROBE CONNECTORS ...................... 24
How to Perform Efficient Diagnosis for an Electrical
Incident ................................................................... 27
WORK FLOW ...................................................... 27
INCIDENT SIMULATION TESTS ........................ 27
CIRCUIT INSPECTION ....................................... 30
Control Units and Electrical Parts ........................... 35
PRECAUTIONS .................................................. 35
CONSULT-II CHECKING SYSTEM .......................... 37
Description .............................................................. 37
Function and System Application ........................... 37
Nickel Metal Hydride Battery Replacement ............ 38
Checking Equipment .............................................. 38
CONSULT-II Start Procedure .................................. 38
CONSULT-II Data Link Connector (DLC) Circuit .... 39
INSPECTION PROCEDURE .............................. 39
LIFTING POINT ......................................................... 40
Pantograph Jack ..................................................... 40
Garage Jack and Safety Stand ............................... 40
2-Pole Lift ............................................................... 41
TOW TRUCK TOWING ............................................. 42
Tow Truck Towing ................................................... 42
2WD MODELS .................................................... 42
4WD MODELS .................................................... 43
Vehicle Recovery (Freeing a stuck vehicle) ............ 43
TIGHTENING TORQUE OF STANDARD BOLTS .... 44
Tightening Torque Table ......................................... 44
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS ............................................................... 45
Recommended Chemical Products and Sealants ... 45
IDENTIFICATION INFORMATION ............................ 46
Model Variation ....................................................... 46
Identification Number .............................................. 47

PRECAUTIONS
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Use approved bonding agent, sealants or their equivalents when required.

Use hand tools, power tools (disassembly only) and recom-
mended special tools where specified for safe and efficient ser-
vice repairs.

When repairing the fuel, oil, water, vacuum or exhaust systems,
check all affected lines for leaks.

Before servicing the vehicle:
Protect fenders, upholstery and carpeting with appropriate cov-
ers.
Take caution that keys, buckles or buttons do not scratch paint.
WA RN ING:
To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness
connectors which are related to the engine control system and TCM (transmission control module)
system. The connectors should be disconnected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC and AT sections.
Precautions for Three Way CatalystEAS001F8
If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To
prevent this, follow the instructions.

Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.

When checking for ignition spark or measuring engine compression, make tests quickly and only when
necessary.

Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to
the catalyst.
Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.
Precautions for Fuel (Unleaded Regular Gasoline Recommended)EAS001XQ
Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research
octane number 91). E-85 fuel (85% fuel ethanol, 15% unleaded gasoline) may only be used in vehicles specif-
ically designed for E-85 fuel (i.e. Flexible Fuel Vehicle - FFV models.)
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85% fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV Models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
PBIC0190E
SGI234

GI-36
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: October 20052005 QX56

Do not apply excessive shock to the control unit by dropping or
hitting it.

Be careful to prevent condensation in the control unit due to
rapid temperature changes and do not let water or rain get on it.
If water is found in the control unit, dry it fully and then install it in
the vehicle.

Be careful not to let oil to get on the control unit connector.

Avoid cleaning the control unit with volatile oil.

Do not disassemble the control unit, and do not remove the
upper and lower covers.

When using a DMM, be careful not to let test probes get close to
each other to prevent the power transistor in the control unit
from damaging battery voltage because of short circuiting.

When checking input and output signals of the control unit, use
the specified check adapter.
SAIA0255E
SEF 3 48 N

GW-94
REAR WINDOW DEFOGGER
Revision: October 20052005 QX56
3. CHECK DOOR MIRROR DEFOGGER
Check continuity between door mirror RH terminals 10 and 11.
OK or NG
OK >> Repair or replace harness.
NG >> Replace door mirror RH. Refer to GW-97, "
Door Mirror
Assembly" .
Rear Window Defogger Signal CheckEIS005Z3
1. CHECK AV COMMUNICATION LINE
AV communication line check is executed. Refer to BCS-8, "
CAN Communication System Description" .
OK or NG
OK >> GO TO 2.
NG >> Replace display control unit. Refer to AV- 1 5 8 , "
Removal and Installation of Display Unit" .
2. CHECK CAN COMMUNICATION LINE
CAN communication line check is executed. Refer to LAN-5, "
CAN COMMUNICATION" .
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> In addition, it is necessary to check CAN communication line. Refer to LAN-5, "
CAN COMMUNI-
CATION" .
Filament CheckEIS005Z4
1. When measuring voltage, wrap tin foil around the top of the neg-
ative probe.Then press the foil against the wire with your finger.
2. Attach probe circuit tester (in Volt range) to middle portion of
each filament.10 - 11 : Continuity should exist.
LIIA2305E
Is rear window defogger displayed on the display?
SEL122R
SEL263

IDX-2
ALPHABETICAL INDEX
Numerics
2-4WD shift solenoid valve ..... TF-94
, TF-152, TF-165
4WD - Wiring diagram ....................................... TF-24
4WD shift switch ................................................ TF-66
4WD solenoid valve ................ TF-90, TF-152, TF-165
4WD system description .................................... TF-15
4WD system diagram ........................................ TF-19
A
A/C air flow ...................................................... ATC-29
A/C compressor clutch removal and installation .. ATC-
180
A/C compressor mounting ............................. ATC-179
A/C compressor precaution ............................. ATC-11
A/C compressor special service tool ................ ATC-14
A/C control operation (auto A/C) ...................... ATC-26
A/C diagnostic work flow (auto A/C) .............. ATC-132
A/C evaporator ............................................... ATC-186
A/C HFC134a (R134a) system identification ..... ATC-7
A/C HFC134a (R134a) system precaution ........ ATC-5
A/C HFC134a (R134a) system service procedure ATC-
175
A/C HFC134a (R134a) system service tools ... ATC-14
A/C HFC134a system service equipment precaution ...
ATC-11
A/C lubricant (R134a) ...................................... ATC-22
A/C lubrication oil ............................................. ATC-22
A/C operational check ....................... ATC-57, ATC-60
A/C self-diagnoses (auto A/C) ........ ATC-55, ATC-132
A/C service data specification ........................ ATC-193
A/C trouble diagnoses (auto A/C) .................... ATC-33
A/C, A - Wiring diagram ................................... ATC-43
A/T fluid checking ...................... AT-13, AT-50, MA-22
A/T fluid cooler cleaning .................................... AT-13
A/T fluid replacement ............................. AT-13, MA-24
A/T fluid temperature sensor ........................... AT-126
A/T IND - Wiring diagram .................................... DI-40
A/T indicator ........................................................ DI-40
A/T shift lock system ........................................ AT-222
A/T trouble diagnoses ........................................ AT-41
A/T Wiring diagram AT - CAN ............................ AT-96
A/T Wiring diagram AT - FTS .......................... AT-127
A/T Wiring diagram AT - MAIN ........................ AT-168
A/T Wiring diagram AT - NONDTC .................. AT-177
A/T Wiring diagram AT - PNP/SW ................... AT-105
A/T Wiring diagram AT - STSIG ...................... AT-100
A/T Wiring diagram AT - VSS A/T ................... AT-110
ABS - Wiring diagram ..................................... BRC-16
ABS (anti-lock brake system) ........................... BRC-7
Accelerator control system ............................... ACC-2
Accelerator pedal position (APP) sensor . EC-591, EC-
597, EC-611
Accelerator pedal released position learning ..... EC-90
AF1B1-Wiring diagram EC-461, EC-470, EC-479, EC-
489, EC-500, EC-510, EC-522
AF1B2-Wiring diagram EC-463, EC-472, EC-481, EC-
491, EC-502, EC-512, EC-524
AF1HB1-Wiring diagram ................................. EC-387
AF1HB2-Wiring diagram ................................. EC-389
Aiming adjustment .................................. LT-30, LT-78
Air bag ............................................................... SRS-3
Air cleaner and air duct ..................................... EM-14
Air cleaner filter replacement ............................ MA-16
Air conditioner cut control ................................. EC-28
Air flow meter - See Mass air flow sensor EC-174, EC-
183
Air fuel ratio sensor 1 .. EC-459, EC-468, EC-477, EC-
487, EC-497, EC-507, EC-519
Air fuel ratio sensor 1 heater ........................... EC-386
Air mix. door motor .......................................... ATC-70
Ambient sensor ............................. ATC-137, ATC-148
Angular tightening application ............................. EM-3
APPS1 - Wiring diagram ................................. EC-593
APPS2 - Wiring diagram ................................. EC-599
APPS3 - Wiring diagram ................................. EC-613
ASC/BS - Wiring diagram ............................... EC-571
ASC/SW - Wiring diagram .............................. EC-554
ASCBOF - Wiring diagram .............................. EC-658
ASCD ................................................................ EC-29
ASCD (automatic speed control device) ........... ACS-3
ASCD brake switch ........................... EC-569, EC-657
ASCD indicator lamp ....................................... EC-664
ASCD steering switch ..................................... EC-552
ASCIND - Wiring diagram ............................... EC-665
ATP switch ............................ TF-107, TF-110, TF-115
AUDIO - Wiring diagram .................................... AV-10
AUT/DP - Wiring diagram .................................. SE-20
Auto air conditioner - Wiring diagram .............. ATC-43
Auto anti-dazzling inside mirror ........... GW-75, GW-76
Autolamp ............................................................ LT-47
Automatic amplifier ......................................... ATC-61
Automatic drive positioner .................................. SE-11
Automatic transmission number .......................... GI-48
AV and NAVI control unit ................................... AV-63
AV communication line ...................................... AV-87
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Back door ........................................................... BL-99
Back door trim ..................................................... EI-32
Back sonar .......................................................... DI-58
BACK/L - Wiring diagram ................................. LT-106
Back-up lamp ................................................... LT-106
Ball joint (front) ................................................ FSU-15
Basic inspection ................................................ EC-72
Battery ................................................................. SC-4
Battery/Starting/Charging System Tester SC-6, SC-12,
SC-19
BCM (Body control module) .............................. BCS-3
Block heater ...................................................... EM-73
Blower motor ................................... ATC-93, ATC-152
Body alignment ................................................ BL-172
Body component parts ..................................... BL-161
Body construction ............................................ BL-171
Body exterior paint color .................................. BL-160
Body mounting ................................................. BL-159

IDX-4
ALPHABETICAL INDEX
Drive chain (Transfer) ......................... TF-147, TF-174
Drive pinion diff. inspection ............................. RFD-13
Drive pinion height .......................................... RFD-18
Drive shaft (rear) ............................................... RAX-7
Driver air bag .................................................. SRS-46
DTC work support ............................................ EC-136
DTRL - Wiring diagram ....................................... LT-37
Duct and grilles .............................................. ATC-170
DVD Player ........................................................ AV-60
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ECM input/output signal ..................... EC-117
, EC-141
ECM power supply ............................. EC-157, EC-393
ECM relay ........................................................ EC-157
ECM/PW - Wiring diagram ............................... EC-394
ECTS - Wiring diagram .................................... EC-197
Electric sunroof .................................................. RF-10
Electric throttle control actuator ......... EC-397, EC-399
Electrical load signal circuit .............................. EC-648
Electrical units location ...................................... PG-63
Electronic ignition (EI) system ........................... EC-26
Engine control circuit diagram ......................... EC-115
Engine control component parts location ......... EC-108
Engine control module (ECM) .......................... EC-383
Engine control system diagram ......................... EC-23
Engine coolant .................................................. CO-10
Engine coolant temperature sensor (ECTS) ... EC-195,
EC-208
Engine fail-safe system .................................... EC-103
Engine oil ............................................................. LU-7
Engine oil filter replacement ............................. MA-17
Engine oil precautions .......................................... GI-7
Engine oil replacement ..................................... MA-17
Engine removal ................................................. EM-69
Engine room cover ............................................ EM-11
Engine serial number .......................................... GI-48
ETC1 - Wiring diagram .................................... EC-400
ETC2 - Wiring diagram .................................... EC-407
ETC3 - Wiring diagram .................................... EC-411
EVAP canister .................................................... EC-35
EVAP canister purge volume control solenoid valve ....
EC-318
, EC-531
EVAP canister vent control valve ....... EC-325, EC-539
EVAP control system (small leak) diagnosis .. EC-309,
EC-349
, EC-357
EVAP control system pressure sensor .... EC-332, EC-
335, EC-341
EVAP control system purge flow monitoring diagnosis
EC-304
EVAP vapor lines inspection ............................. MA-20
Evaporative emission (EVAP) system ............... EC-32
Evaporator ..................................................... ATC-186
Exhaust manifold .............................................. EM-19
Exhaust system ................................................... EX-3
Exhaust system inspection .................................. EX-3
Expansion valve ............................................. ATC-188
F
F/FOG - Wiring diagram ..................................... LT-71
F/PUMP - Wiring diagram ............................... EC-638
Final drive pre-inspection .................. FFD-14, RFD-13
Final drive removal and installation ... FFD-11, RFD-10
Flow charts .......................................................... GI-27
Fluid temperature sensor (A/T) ........................ AT-126
Fluids ................................................................ MA-11
Fluorescent leak detector .............................. ATC-189
Fog lamp, front ................................................... LT-69
Foot lamp ......................................................... LT-130
Freeze frame data ............................... EC-54, EC-130
Front brake solenoid valve ................. AT-144, AT-146
Front bumper ...................................................... EI-13
Front case (Transfer) .......................... TF-147, TF-174
Front combination lamp removal and installation LT-32
Front door ............................. BL-128, BL-131, GW-68
Front Door Trim ................................................... EI-32
Front drive shaft (Transfer) ................. TF-147, TF-174
Front fog lamp .................................................... LT-69
Front passenger air bag .................................. SRS-51
Front seat ........................................................... SE-97
Front seat belt ...................................................... SB-3
Front seat belt pre-tensioner ............... SRS-3, SRS-58
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTTS - Wiring diagram ...................... EC-255, EC-260
Fuel cut control (at no load high engine speed) EC-27
Fuel filter replacement ......................................... FL-5
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) .......... EC-236, EC-245
Fuel injection system (Bank 2) .......... EC-236, EC-245
Fuel injector and fuel tube ................................. EM-29
Fuel level sensor ................. EC-366, EC-368, EC-370
Fuel line inspection .............................................. FL-3
Fuel pressure check .......................................... EC-93
Fuel pressure release ....................................... EC-93
Fuel pump ....................................................... EC-637
Fuel pump and gauge .......................................... FL-5
Fuel system .......................................................... FL-3
Fuel tank .............................................................. FL-9
Fuel tank temperature sensor ........... EC-253, EC-259
Fuel tank vacuum relief valve ........................... EC-35
FUELB1 - Wiring diagram ................. EC-238, EC-247
FUELB2 - Wiring diagram ................. EC-239, EC-248
Fuse ...................................................... PG-66, PG-77
Fuse and fusible link box .................................. PG-77
Fuse block ......................................................... PG-76
Fusible link ............................................ PG-66, PG-77
G
Garage jack and safety stand ............................. GI-40
Gauges ................................................................. DI-5
Generator .......................................................... SC-17
Generic scan tool (GST) ................................. EC-139
Glass ...................................... GW-11, GW-68, GW-71
Glove box lamp ................................................ LT-153