service INFINITI QX56 2006 Factory Service Manual

PR-4
FRONT PROPELLER SHAFT
Revision: November 20092006 QX56
FRONT PROPELLER SHAFTPFP:37200
On-Vehicle ServiceEDS001W5
PROPELLER SHAFT VIBRATION
NOTE:
If a vibration is present at high speed, inspect the propeller shaft run out first.
1. Measure the run out of the propeller shaft tube at several points
by rotating the final drive companion flange with your hands.
2. If the run out still exceeds specifications, disconnect the propel- ler shaft at the final drive companion flange; then rotate the com-
panion flange 90 °, 180 °, 270 ° degrees and reconnect the
propeller shaft.
3. Check the run out again. If the run out still exceeds specifica- tions, replace the propeller shaft assembly.
4. After installation, check for vibration by driving the vehicle.
INSPECTION
Inspect the propeller shaft tube for dents or cracks. If damaged, replace the propeller shaft assembly.
Removal and InstallationEDS001W6
Model 2F1310
Propeller shaft run out limit : 0.6 mm (0.024 in) or less
SDIA1759E
WDIA0047E
1. Propeller shaft tube 2. Snap ring 3. Journal bearing
4. Journal 5. Flange yoke

PR-8
REAR PROPELLER SHAFT
Revision: November 20092006 QX56
REAR PROPELLER SHAFTPFP:37000
On-Vehicle ServiceEDS001W8
PROPELLER SHAFT VIBRATION
NOTE:
If vibration is present at high speed, check propeller shaft run out first, then check mounting between propeller
shaft and companion flange.
1. Measure the run out of the propeller shaft tube at several points
by rotating the final drive companion flange with your hands.
2. If the run out still exceeds specifications, disconnect the propel- ler shaft at the final drive companion flange; then rotate the com-
panion flange 90 °, 180 °, 270 ° degrees and reconnect propeller
shaft.
3. Check the run out again. If the run out still exceeds specifica- tions, replace the propeller shaft assembly.
4. After installation, check for vibration by driving vehicle.
INSPECTION
Inspect the propeller shaft tube for dents or cracks. If damaged, replace the propeller shaft assembly.
Removal and InstallationEDS001W9
Model 2S1350
Propeller shaft run out limit : 1.02 mm (0.0402 in) or less
SDIA1781E
WDIA0048E
1. Propeller shaft tube 2. Snap ring 3. Journal bearing
4. Sleeve yoke 5. Journal 6. Flange yoke

PR-12
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: November 20092006 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
General SpecificationsEDS001WB
4X2 Model
4X4 Model
Applied modelVK56DE
Propeller shaft model 2S1350
Number of joints 2
Coupling method with rear final drive Flange type
Coupling method with transmission Sleeve type
Shaft length (Spider to spider) 1640 mm (64.57 in)
Shaft outer diameter 127.6 mm (5.02 in)
Journal axial play 0.02 mm (0.0008 in) or less
Propeller shaft run out limit 1.02 mm (0.0402 in) or less
Propeller shaft joint flex effort 2.26 N·m (0.23 kg-m, 20 in-lb) or less
Applied model VK56DE
Propeller shaft model Front
Rear
2F1310 2S1350
Number of joints 2
Coupling method with front final drive Flange type
Coupling method with transfer Flange typeSleeve type
Shaft length (Spider to spider) 718 mm (28.27 in)1640 mm (64.57 in)
Shaft outer diameter 63 5 mm (2.5 in)127.6 mm (5.02 in)
Journal axial play 0.02 mm (0.0008 in) or less
Propeller shaft run out limit 0.6 mm (0.024 in) or less 1.02 mm (0.0402 in) or less
Propeller shaft joint flex effort 1.96 N·m (0.20 kg-m, 17 in-lb)
or less 2.26 N·m (0.23 kg-m, 20 in-lb)
or less

SERVICE DATA AND SPECIFICATIONS (SDS)PR-13
CE F
G H
I
J
K L
M A
B
PR
Revision: November 2009 2006 QX56
Snap RingEDS001WC
Model 2F1310
Unit: mm (in)
*Always check with the Parts Department for the latest parts information.
Model 2S1350
Unit: mm (in)
*Always check with the Parts Department for the latest parts information. Thickness
ColorPart Number*
1.99 (0.0783) White37146-C9400
2.02 (0.0795) Yellow37147-C9400
2.05 (0.0807) Red37148-C9400
2.08 (0.0819) Green37149-C9400
2.11 (0.0831) Blue37150-C9400
2.14 (0.0843) Light brown 37151-C9400
2.17 (0.0854) Black37152-C9400
2.20 (0.0866) No paint37153-C9400
Thickness ColorPart Number*
1.600 - 1.638 (0.0630 - 0.0645) Black37146-7S000
1.549 - 1.588 (0.0610 - 0.0625) Black37147-7S000
1.524 - 1.562 (0.0600 - 0.0615) Black37148-7S000
1.499 - 1.537 (0.0590 - 0.0605) Black37149-7S000

PR-14
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: November 20092006 QX56

PS-1
POWER STEERING SYSTEM
G STEERING
CONTENTS
C
DE
F
H I
J
K L
M
SECTION
A
B
PS
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 2
Precautions for Steering System ......................... ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools (SST) ................................ ..... 3
Commercial Service Tools ................................... ..... 4
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 5
NVH Troubleshooting Chart ................................ ..... 5
POWER STEERING FLUID ................................... ..... 6
Checking Fluid Level ........................................... ..... 6
Checking Fluid Leakage ...................................... ..... 6
Air Bleeding Hydraulic System ............................ ..... 6
STEERING WHEEL .................................................... 7 On-Vehicle Inspection and Service ..................... ..... 7
CHECKING CONDITION OF INSTALLATION . ..... 7
CHECKING STEERING WHEEL PLAY ........... ..... 7
CHECKING NEUTRAL POSITION ON STEER-
ING WHEEL ..................................................... ..... 7
CHECKING STEERING WHEEL TURNING
FORCE ............................................................. ..... 7
CHECKING FRONT WHEEL TURNING ANGLE ..... 8
Removal and Installation ..................................... ..... 8
REMOVAL ........................................................ ..... 8
INSTALLATION ................................................ ..... 8
TILT SYSTEM ............................................................. 9 Removal and Installation ..................................... ..... 9
TILT MOTOR AND TILT SENSOR ................... ..... 9
STEERING COLUMN ............................................ ... 10
Removal and Installation ..................................... ... 10
REMOVAL ........................................................ ... 10
INSPECTION AFTER REMOVAL .................... .... 11
INSTALLATION ................................................ .... 11INSPECTION AFTER INSTALLATION .............
... 12
Disassembly and Assembly ................................. ... 13
DISASSEMBLY ................................................ ... 13
ASSEMBLY ...................................................... ... 14
INSPECTION AFTER ASSEMBLY ................... ... 14
POWER STEERING GEAR AND LINKAGE ......... ... 15
Removal and Installation ..................................... ... 15
REMOVAL ........................................................ ... 15
INSTALLATION ................................................ ... 16
INSPECTION AFTER INSTALLATION ............. ... 17
Disassembly and Assembly ................................. ... 17
DISASSEMBLY ................................................ ... 17
INSPECTION AFTER DISASSEMBLY ............. ... 18
ASSEMBLY ...................................................... ... 19
POWER STEERING OIL PUMP ............................ ... 21
On-Vehicle Inspection and Service ...................... ... 21
CHECKING RELIEF OIL PRESSURE ............. ... 21
Removal and Installation ..................................... ... 21
REMOVAL ........................................................ ... 21
INSTALLATION ................................................ ... 21
Disassembly and Assembly ................................. ... 22
INSPECTION BEFORE DISASSEMBLY .......... ... 22
DISASSEMBLY ................................................ ... 22
INSPECTION AFTER DISASSEMBLY ............. ... 22
ASSEMBLY ...................................................... ... 22
HYDRAULIC LINE ................................................. ... 23
Removal and Installation ..................................... ... 23
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 25
Steering Wheel .................................................... ... 25
Steering Column .................................................. ... 25
Steering Outer Socket and Inner Socket ............. ... 26
Steering Gear ...................................................... ... 27
Oil Pump ................................................................. 27
Steering Fluid .......................................................... 27

PS-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EGS000U4
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 Steering SystemEGS000U5

Before disassembly, thoroughly clean the outside of the unit.

Disassembly should be done in a clean work area. It is important to prevent the internal parts from becom-
ing contaminated by dirt or other foreign matter.

For easier and proper assembly, place disassembled parts in order on a parts rack.

Use nylon cloth or paper towels to clean the parts; common shop rags can leave lint that might interfere
with their operation.

Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable solvent.

Before assembly, apply a coat of recommended Genuine NISSAN PSF or equivalent to hydraulic parts.
Petroleum jelly may be applied to O-rings and seals. Do not use any grease.

Replace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during installation.
Perform functional tests whenever designated.

PREPARATIONPS-3
C
DE
F
H I
J
K L
M A
B
PS
Revision: November 2009 2006 QX56
PREPARATIONPFP:00002
Special Service Tools (SST)EGS00121
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST3127 S000
(See J-25765-A)
Preload gauge
1. GG9103000
(J-25765-A)
Torque wrench
2. HT62940000
( — )
Socket adapter
3. HT62900000
( — )
Socket adapter Inspecting of pinion rotating torque and rota-
tional torque for ball joint
HT72520000
(J-25730-A)
Ball joint remover Removing steering outer socket
1. KV48105300-4 and 5295262U10
( — )
Connector A and O-ring
2. KV48105300-3 and 5295262U00
( — )
Eye-bolt and O-ring
3. KV48103500
(J-26357 and J-26357-10)
Pressure gauge and shut-off valve
4. KV48105300-1 and 5295262U00
( — )
Connector B and O-ring
5. KV48105300-2
( — )
Nut Measuring oil pump relief pressure
KV481J0010
(J-1859-A)
Steering wheel puller Removing steering wheel
KV481J0020
(J-42578)
Steering wheel puller legs Removing steering wheel
S-NT541
NT146
SGIA0427E
LHIA0043E
LHIA0044E

PS-4
PREPARATION
Revision: November 20092006 QX56
Commercial Service ToolsEGS00122
KV40107300
(— ) Crimping boot bands
—
(J-44372)
Spring gauge Measuring steering wheel turning force
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA1229D
LST024
Tool name
Description
Power tool Removing nuts and bolts
PBIC0190E

STEERING WHEELPS-7
C
DE
F
H I
J
K L
M A
B
PS
Revision: November 2009 2006 QX56
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceEGS000UC
CHECKING CONDITION OF INSTALLATION

Check installation condition of steering gear assembly, front suspension, axle and steering column.

Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.

Check if the mounting nuts for steering gear assembly are loose.
Refer to PS-15, "
POWER STEERING GEAR AND LINKAGE" .
CHECKING STEERING WHEEL PLAY
1. Turn tires straight ahead, start engine, then turn steering wheel to the left and right lightly, and measure
steering wheel movement on the outer circumference when steering wheel is turned up to the point where
tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL

Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to
FSU-6, "
Front Wheel Alignment" .
1. Turn tires straight ahead, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remove steering wheel and reinstall it correctly.
3. If the neutral position cannot be attained by repositioning the steering wheel two teeth or less on steering stem, loosen tie-rod lock nuts of steering outer sockets, then adjust tie-rods by the same amount in the
opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering fluid up to operating temperature of 60 ° – 80° C (140 ° – 176° F).
4. Tires need to be inflated to specified pressure. Refer to WT-38, "
Tire" .
5. Check steering wheel turning force using Tool when steering wheel has been turned 360 ° from the neutral position.
6. If steering wheel turning force is out of specification, inspect the following:

Steering column. Refer to PS-11, "INSPECTION AFTER
REMOVAL" .

Power steering oil pump. Refer to PS-21, "CHECKING
RELIEF OIL PRESSURE" .
7. If steering column and power steering oil pump meet specifications, replace steering gear. Refer to PS-15,
"Removal and Installation" .
End play of the axial direction for steering wheel : 0 mm (0 in)
LGIA0024E
Steering wheel play on the outer circumference : 0
− 35 mm (0 − 1.38 in)
Tool number : J-44372
Steering wheel
turning force : 39 N (4 kg-f, 9 lb-f) or less
WGIA0035E