2004 INFINITI QX56 lock

FSU-2
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
PrecautionsEES0010D

When installing the rubber bushings, the final tightening must be done under unladen condition and with
the tires on level ground. Oil will shorten the life of the rubber bushings, so wipe off any spilled oil immedi-
ately.

Unladen condition means the fuel tank, engine coolant and lubricants are at the full specification. The
spare tire, jack, hand tools, and mats are in their designated positions.

After installing suspension components, check the wheel alignment.

Lock nuts are not reusable. Always use new lock nuts for installation. New lock nuts are pre-oiled, do not
apply any additional lubrication.

FSU-8
ON-VEHICLE SERVICE
Revision: August 20072004 QX56
TOE-IN
WAR NIN G:

Always perform the following procedure on a flat surface.

Make sure that no person is in front of the vehicle before pushing it.
1. Bounce the front of vehicle up and down to stabilize the vehicle height (posture).
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both front tires
at the same height as hub center as shown. These marks are
measuring points.
4. Measure the distance “A” on the rear side of the front tires as
shown.
5. Push the vehicle slowly ahead to rotate the wheels 180°
degrees (1/2 a turn).
CAUTION:
If the wheels have rotated more than 180° degrees (1/2
turn), start this procedure again from the beginning. Never
push the vehicle backward.
6. Measure the distance “B” on the front side of the front tires at the
same marks as shown. Total toe-in is calculated as “A” – “B”.
7. Adjust the toe-in by varying the length of the steering outer tie-
rods.
a. Loosen the outer tie-rod lock nuts.
b. Adjust the toe-in by screwing the outer tie-rods in or out.
c. Tighten the outer tie-rod lock nuts to specification.
FRONT WHEEL TURNING ANGLE
1. Start engine and run at idle.
2. Set wheels in straight-ahead position. Then move vehicle for-
ward until front wheels rest on turning radius gauge properly.

Make sure vehicle is level.
3. Rotate steering wheel all the way right and left; measure turning
angle.

If front wheel turning angles are out of the specification, check
if the following parts are worn or damaged.
AFA05 0
Total toe-in : Refer to FSU-20, "Wheel Alignment
(Unladen*1 )" .
SFA234AC
Standard length “L” : Refer to PS-15, "POWER
STEERING GEAR AND LINK-
AGE" .
Lock nut : Refer to PS-15, "
Removal and
Installation" .
SFA486A
Wheel turning angle
(full turn): Refer to FSU-20, "Wheel
Alignment (Unladen*1 )" .
SFA439BA

FSU-10
COIL SPRING AND SHOCK ABSORBER
Revision: August 20072004 QX56
COIL SPRING AND SHOCK ABSORBERPFP:56210
Removal and InstallationEES0010K
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-6, "Rotation" .
Disassembly and AssemblyEES0010L
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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Revision: August 20072004 QX56
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
2WD : 325.5 ± 3 mm (12.8 ± 0.1 in)
4WD : 335.0 ± 3 mm (13.2 ± 0.1 in)
SFA508A
WEIA0093E

KNUCKLE
FSU-17
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Revision: August 20072004 QX56
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On-Vehicle Inspection and ServiceEES0010R
Make sure the mounting conditions (looseness, backlash) of each component and component status (wear,
damage) are within specifications. Refer to FSU-21, "
Ball Joint" .
Removal and InstallationEES0010S
REMOVAL
1. Remove wheel and tire from vehicle using power tool.
2. Without disconnecting the hydraulic lines, remove brake caliper using power tool. Reposition it aside with
wire. Refer to BR-22, "
Removal and Installation of Brake Caliper and Disc Rotor" .
CAUTION:
It is not necessary to remove bolts on torque member and brake hose except for disassembly or
replacement of caliper assembly. In this case, hang cylinder body with a wire so that the brake
hose in not under tension.
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
3. Put alignment marks on disc rotor and wheel hub and bearing
assembly, then remove disc rotor.
4. Remove ABS sensor from steering knuckle. Refer to BRC-64, "
Removal and Installation" .
CAUTION:
Do not pull on ABS sensor harness.
5. Remove cotter pin, then remove lock nut from drive shaft using power tool.
6. Remove steering outer socket cotter pin at steering knuckle, then loosen mounting nut using power tool.
1. Disc rotor 2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle
WDIA0043E
WDIA0044E

PRECAUTIONS
GI-3
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Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
DescriptionEAS00146
Observe the following precautions to ensure safe and proper servicing. These precautions are not
described in each individual section.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EAS00147
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 for NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM -
NATS) (If Equipped)
EAS001QV
NVIS/IVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of NVIS/IVIS
(NATS).
Both of the originally supplied ignition key IDs have been NVIS/IVIS (NATS) registered.
The security indicator is located on the instrument panel. The indicator blinks when the immobilizer system is
functioning.
Therefore, NVIS/IVIS (NATS) warns outsiders that the vehicle is equipped with the anti-theft system.

When NVIS/IVIS (NATS) detects trouble, the security indicator lamp lights up while ignition switch is in
"ON" position.
This lighting up indicates that the anti-theft is not functioning, so prompt service is required.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), CONSULT-II hardware and CONSULT-II NVIS/IVIS (NATS)
software is necessary.
Regarding the procedures of NVIS/IVIS (NATS) initialization and NVIS/IVIS (NATS) ignition key ID regis-
tration, refer to CONSULT-II operation manual, NVIS/IVIS (NATS).
Therefore, CONSULT-II NVIS/IVIS (NATS) software (program card and operation manual) must be kept
strictly confidential to maintain the integrity of the anti-theft function.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), it may be necessary to re-register original key identification.
Therefore, be sure to receive all keys from vehicle owner. A maximum of four or five key IDs can be regis-
tered into NVIS/IVIS (NATS).

When failing to start the engine first time using the key of NVIS/IVIS (NATS), start as follows.
1. Leave the ignition key in "ON" position for approximately 5 seconds.
2. Turn ignition key to "OFF" or "LOCK" position and wait approximately 5 seconds.
3. Repeat step 1 and 2 again.
4. Restart the engine while keeping the key separate from any others on key-chain.

GI-4
PRECAUTIONS
Revision: August 20072004 QX56
General PrecautionsEAS00148

Do not operate the engine for an extended period of time without
proper exhaust ventilation.
Keep the work area well ventilated and free of any flammable
materials. Special care should be taken when handling any flam-
mable or poisonous materials, such as gasoline, refrigerant gas,
etc. When working in a pit or other enclosed area, be sure to
properly ventilate the area before working with hazardous mate-
rials.
Do not smoke while working on the vehicle.

Before jacking up the vehicle, apply wheel chocks or other tire
blocks to the wheels to prevent the vehicle from moving. After
jacking up the vehicle, support the vehicle weight with safety
stands at the points designated for proper lifting before working
on the vehicle.
These operations should be done on a level surface.

When removing a heavy component such as the engine or tran-
saxle/transmission, be careful not to lose your balance and drop
them. Also, do not allow them to strike adjacent parts, especially
the brake tubes and master cylinder.

Before starting repairs which do not require battery power:
Turn off ignition switch.
Disconnect the negative battery terminal.

If the battery terminals are disconnected, recorded memory of
radio and each control unit is erased.

Battery posts, terminals and related accessories contain lead
and lead compounds. Wash hands after handling.

To prevent serious burns:
Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.

Dispose of or recycle drained oil or the solvent used for cleaning
parts in an appropriate manner.

Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel
spray and possibly a fire.

Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly.

Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new
ones.

Replace inner and outer races of tapered roller bearings and needle bearings as a set.

Arrange the disassembled parts in accordance with their assembled locations and sequence.

Do not touch the terminals of electrical components which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.

After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.

Use only the fluids and lubricants specified in this manual.
SGI285
SGI231
SEF 2 89 H
SGI233

GI-8
HOW TO USE THIS MANUAL
Revision: August 20072004 QX56
HOW TO USE THIS MANUALPFP:00008
Description EAS0014F
This volume explains “Removal, Disassembly, Installation, Inspection and Adjustment” and “Trouble Diag-
noses”.
TermsEAS0014G

The captions WAR NIN G and CAUTION warn you of steps that must be followed to prevent personal
injury and/or damage to some part of the vehicle.
WAR NIN G indicates the possibility of personal injury if instructions are not followed.
CAUTION indicates the possibility of component damage if instructions are not followed.
BOLD TYPED STATEMENTS except WAR NIN G and CAUTION give you helpful information.
Standard value:Tolerance at inspection and adjustment.
Limit value:The maximum or minimum limit value that should not be exceeded at inspection and adjust-
ment.
UnitsEAS0014H

The UNITS given in this manual are primarily expressed as the SI UNIT (International System of Unit),
and alternatively expressed in the metric system and in the yard/pound system.
“Example”
ContentsEAS0014I

ALPHABETICAL INDEX is provided at the end of this manual so that you can rapidly find the item and
page you are searching for.

A QUICK REFERENCE INDEX, a black tab (e.g. ) is provided on the first page. You can quickly find
the first page of each section by matching it to the section's black tab.

THE CONTENTS are listed on the first page of each section.

THE TITLE is indicated on the upper portion of each page and shows the part or system.

THE PAGE NUMBER of each section consists of two or three letters which designate the particular sec-
tion and a number (e.g. “BR-5”).

THE SMALL ILLUSTRATIONS show the important steps such as inspection, use of special tools, knacks
of work and hidden or tricky steps which are not shown in the previous large illustrations.
Assembly, inspection and adjustment procedures for the complicated units such as the automatic tran-
saxle or transmission, etc. are presented in a step-by-step format where necessary.Outer Socket Lock Nut : 59 - 78 N-m (6.0 - 8.0 kg-m, 43 - 58 ft-lb)