2004 INFINITI QX56 Factory Service Manual

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Page 3129 of 3371

INFINITI QX56 2004 Factory Service Manual TF-4
PREPARATION
Revision: August 20072004 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS0017H
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here

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INFINITI QX56 2004 Factory Service Manual PREPARATION
TF-5
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Revision: August 20072004 QX56
ST33200000
(J-26082)
Support ringRemoving mainshaft front bearing
Installing planetary carrier assembly
Installing oil seal
a:

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INFINITI QX56 2004 Factory Service Manual TF-6
PREPARATION
Revision: August 20072004 QX56
ST35300000
(—)
DriftRemoving sun gear assembly
Removing carrier bearing
Installing metal bushing
a: 59 mm (2.32 in) dia.
b: 45 mm (1.77 in) dia.
ST337

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INFINITI QX56 2004 Factory Service Manual PREPARATION
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Revision: August 20072004 QX56
Commercial Service ToolsEDS0017I
Tool nameDescription
Flange wrench Removing and installing companion flange
PullerRemoving co

Page 3133 of 3371

INFINITI QX56 2004 Factory Service Manual TF-8
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS0017J
The Supplemental Rest

TF-8
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS0017J
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.
PrecautionsEDS0017K
Before connecting or disconnecting the transfer control
unit harness connector, turn ignition switch OFF and dis-
connect negative battery terminal. Failure to do so may
damage the transfer control unit. Because battery voltage is
applied to transfer control unit even if ignition switch is
turned off.
When connecting or disconnecting pin connectors into or
from transfer control unit, take care not to damage pin ter-
minals (bend or break).
Make sure that there are not any bends or breaks on trans-
fer control unit pin terminal, when connecting pin connec-
tors.
Before replacing transfer control unit, perform transfer con-
trol unit input/output signal inspection and make sure
whether transfer control unit functions properly or not. (See
page TF-55
.)
SEF 2 89 H
SEF 2 91 H
MEF040DB

Page 3134 of 3371

INFINITI QX56 2004 Factory Service Manual PRECAUTIONS
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Revision: August 20072004 QX56
Service NoticeEDS0017L
1. Before proceeding with disassembly, thoroughly clean the outside of the all-mode 4WD transfer. It is

PRECAUTIONS
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Revision: August 20072004 QX56
Service NoticeEDS0017L
1. Before proceeding with disassembly, thoroughly clean the outside of the all-mode 4WD transfer. It is
important to prevent the internal parts from becoming contaminated by dirt or other foreign matter.
2. Disassembly should be done in a clean work area.
3. Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the all-mode 4WD transfer.
4. Place disassembled parts in order for easier and proper assembly.
5. All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
6. Gaskets, seals and O-rings should be replaced any time the all-mode 4WD transfer is disassembled.
7. It is very important to perform functional tests whenever they are indicated.
8. The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place removed parts in a parts rack in order to replace them in correct positions and sequences. Care will
also prevent springs and small parts from becoming scattered or lost.
9. Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
10. Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings
and seals, and to hold bearings and washers in place during assembly. Do not use grease.
11. Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
12. After overhaul, refill the transfer with new ATF.
13. When the all-mode 4WD transfer drain plug is removed, only some of the fluid is drained. Old all-mode
4WD transfer fluid will remain in torque converter and ATF cooling system. Always follow the proper pro-
cedure. Refer to MA-24, "
Changing Transfer Fluid" .
Wiring Diagrams and Trouble DiagnosisEDS001CE
When you read wiring diagrams, refer to the following:
GI-15, "How to Read Wiring Diagrams" .
PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:
GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".
GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident".

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INFINITI QX56 2004 Factory Service Manual TF-10
ALL-MODE 4WD SYSTEM
Revision: August 20072004 QX56
ALL-MODE 4WD SYSTEMPFP:00000
Cross-sectional ViewEDS0017N
LDIA0053E
1. Center case 2. Chain 3. Multiple disc clutch
4. Rear case 5. Main shaft

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INFINITI QX56 2004 Factory Service Manual ALL-MODE 4WD SYSTEM
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Revision: August 20072004 QX56
Control SystemEDS0017O
WDIA0074E

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