tow INFINITI QX56 2006 Factory Workshop Manual

REAR LOWER LINK & COIL SPRINGRSU-41
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Revision: November 2009 2006 QX56
8. Remove the rear lower link adjusting bolt and nut from the rear
suspension member using power tool, then remove the rear
lower link.
INSPECTION AFTER REMOVAL
Check the coil spring and rubber seats for deformation, cracks, or other damage and replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.

Tighten the nuts and bolts to specification. Refer to RSU-26, "Components" .

When installing the upper and lower rubber seats for the rear
coil springs, the arrow embossed on the rubber seats must point
out toward the wheel and tire assembly.

After installing the rear lower link and coil spring, check the
wheel alignment and adjust if necessary. Refer to RSU-28,
"Wheel Alignment Inspection" .
LEIA0009E
LEIA0076E

PRECAUTIONSSRS-3
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SRS
Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS0016A
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.
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” ServiceEHS0016B

Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min-
utes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bags and seat belt
pre-tensioners to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.

The air diagnosis sensor unit must always be installed with the arrow mark “⇐” pointing toward the front of
the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or rust
before installation and replace as required.

The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.

Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and seat mounted front side air bag module standing with the stud bolt side facing
down.

Conduct self-diagnosis to check entire SRS for proper function after replacing any components.

After air bag inflates, the front instrument panel assembly should be replaced if damaged.
Occupant Classification System PrecautionEHS0016C
Replace control unit and passenger front seat cushion as an assembly.

SPIRAL CABLESRS-49
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Revision: November 2009 2006 QX56
4. While pressing tabs, pull lighting and turn signal switch toward
driver door and disconnect from base.
5. Remove the screws, release the clip, and remove the spiral cable.
CAUTION:

Do not disassemble spiral cable.

Do not apply lubricant to the spiral cable.
6. Remove the spiral cable connectors. CAUTION:
With the steering linkage disconnected, the spiral cable may snap by turning the steering wheel
beyond the limited number of turns. The spiral cable can be turned counterclockwise about 2.5
turns from the neutral position.
INSTALLATION
Installation is in the reverse order of removal.

Align spiral cable correctly when installing steering wheel. Make
sure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.6 revolutions from the right
end position and ending with the knob at the top.

If equipped with VDC, refer to BRC-62, "Adjustment of Steering
Angle Sensor Neutral Position" for steering angle sensor adjust-
ment.

After the work is completed, perform self-diagnosis to make sure
no malfunction is detected. Refer to SRS-20, "
SRS Operation
Check" .
CAUTION:

The spiral cable may snap due to steering operation if the
cable is not installed in the correct position.

With the steering linkage disconnected, the cable may snap
by turning the steering wheel beyond the limited number of
turns. The spiral cable can be turned counterclockwise
about 2.5 turns from the right end position.
LHIA0035E
LHIA0036E
WGIA0038E
PHIA0275E

SRS-58
DIAGNOSIS SENSOR UNIT
Revision: November 20092006 QX56
DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationEHS00175
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner.
3. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
4. Disconnect diagnosis sensor unit harness connectors.
5. Remove fixing bolts from the diagnosis sensor unit.
CAUTION:

Do not use old bolts; replace with new bolts.

Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace with new one.

Replace diagnosis sensor unit if it has been dropped or sustained an impact.
INSTALLATION
Installation is in the reverse order of removal.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
CAUTION:

The diagnosis sensor unit must always be installed with the arrow mark " ⇐" pointing toward the
front of the vehicle for proper operation.
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that the diagnosis sensor unit identification is correct for the
vehicle as equipped. Refer to SRS-18, "
CONSULT-II Function (AIR BAG)" .
LHIA0063E

PRECAUTIONSTF-5
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TF
Revision: November 2009 2006 QX56

When connecting or disconnecting pin connectors into or
from transfer control unit, take care not to damage pin ter-
minals (bend or break).
When connecting pin connectors make sure that there are
not any bends or breaks on transfer control unit pin termi-
nals.

Before replacing transfer control unit, perform transfer con-
trol unit input/output signal inspection and make sure
transfer control unit functions properly. Refer to TF-35,
"Transfer Control Unit Input/Output Signal Reference Val-
ues" .
Service NoticeEDS002H6

After overhaul refill the transfer with new transfer fluid.

Check the fluid level or replace the fluid only with the vehicle parked on level ground.

During removal or installation, keep inside of transfer clear of dust or dirt.

Disassembly should be done in a clean work area.

Before proceeding with disassembly, thoroughly clean the transfer. It is important to prevent the internal
parts from becoming contaminated by dirt or other foreign matter.

Check for the correct installation status prior to removal or disassembly. If matchmarks are required, be
certain they do not interfere with the function of the parts when applied.

All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.

Check appearance of the disassembled parts for damage, deformation, and unusual wear. Replace them
with new ones if necessary.

Gaskets, seals and O-rings should replaced any time the transfer is disassembled.

In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to outside. If
tightening sequence is specified, use it.

Observe the specified torque when assembling.

Clean and flush the parts sufficiently and blow-dry them.

Be careful not to damage sliding surfaces and mating surfaces.

Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transfer.
SEF291H
MEF040DB

REAR WIPER AND WASHER SYSTEMWW-51
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Revision: November 2009 2006 QX56
Rear Washer Tube LayoutEKS00BEQ
NOTE:
Connect the check valve (2) to the washer fluid reservoir tube (1) so
that the directional arrow on the check valve (2) points towards the
washer nozzle tube (3).
Rear Washer NozzleEKS00BER
REMOVAL AND INSTALLATION
Removal
1. Remove the rear spoiler. Refer to EI-26, "REAR SPOILER" .
2. Release retaining clips, and remove washer nozzle.
INSTALLATION
Installation is in the reverse order of removal.
Removal and InstallationEKS00BET
REAR WIPER AND WASHER SWITCH
Refer to WW-30, "Wiper and Washer Switch" .
WKIA4566E
1. Rear washer nozzle 2. Washer fluid reservoir3. Check valve
WKIA4242E
LKIA0418E