Infiniti QX4 (R50). Manual — part 546
NOTES
STEERING SYSTEM
CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . ...2
Supplemental Restraint System (SRS)
. . . ...2
Precautions for Steering System. . . . . . . . .2
PREPARATION . . . . . . . . . . . . . . . ...3
Special Service Tools . . . . . . . . . . . . ..3
Commercial Service Tools . . . . . . . . . . ...5
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING . . . . . . . . . . . . . .6
NVH Troubleshooting Chart. . . . . . . . . . .6
ON-VEHICLE SERVICE . . . . . . . . . . . . ..7
Checking Steering Wheel Play. . . . . . . . . 7
Checking Neutral Position on Steering Wheel . . . 7
. . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . ...7
Front Wheel Turning Angle. . . . . . . . . . ..7
Checking Gear Housing Movement . . . . . . . 8
Adjusting Rack Retainer . . . . . . . . . . . ..8
Checking and Adjusting Drive Belts . . . . . . . 8
Checking Fluid Level . . . . . . . . . . . . ...8
Checking Fluid Leakage . . . . . . . . . . . ..8
Bleeding Hydraulic System. . . . . . . . . . ..9
Checking Steering Wheel Turning Force . . . . . 9
Checking Hydraulic System. . . . . . . . . ...10
STEERING WHEEL AND STEERING COLUMN . . . 11
Components. . . . . . . . . . . . . . . ... 11
Removal and Installation . . . . . . . . . . ... 11
. . . . . . . . . . . . . 11
. . . . . . . . . . . ...12
Disassembly and Assembly. . . . . . . . . ...13
Inspection. . . . . . . . . . . . . . . . ...14
. . . . . . . . . . . . ...14
STEERING TRANSFER GEAR . . . . . . . . . .15
Removal. . . . . . . . . . . . . . . . . .15
Installation. . . . . . . . . . . . . . . . ..16
Inspection. . . . . . . . . . . . . . . . ...16
POWER STEERING GEAR AND LINKAGE . . . . 17
Components. . . . . . . . . . . . . . . ...17
Removal and Installation . . . . . . . . . . ...18
Disassembly. . . . . . . . . . . . . . . ...19
Inspection. . . . . . . . . . . . . . . . ...20
. . . . . . . . . . . . . . . . . .20
. . . . . . . . . . . . . . . . . .20
. . . . . . . . . . . . .20
. . . . . . . . . 20
TIE-ROD OUTER AND INNER SOCKETS
. . . . ..21
Assembly . . . . . . . . . . . . . . . . ...21
Adjustment . . . . . . . . . . . . . . . . .24
POWER STEERING OIL PUMP. . . . . . . . . 27
Components. . . . . . . . . . . . . . . ...27
Pre-disassembly Inspection. . . . . . . . . ...27
Disassembly. . . . . . . . . . . . . . . ...28
Inspection. . . . . . . . . . . . . . . . ...29
Assembly . . . . . . . . . . . . . . . . ...29
SERVICE DATA AND SPECIFICATIONS (SDS) . . .32
General Specifications. . . . . . . . . . . ...32
Steering Wheel . . . . . . . . . . . . . . ..32
Steering Column . . . . . . . . . . . . . . 32
Steering Transfer Gear . . . . . . . . . . . ..32
Steering Gear and Linkage . . . . . . . . . ...33
Power Steering . . . . . . . . . . . . . . ..33
GI
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RS
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Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
NBST0044
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI QX4 is as follows:
I
For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I
For a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I
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 performed
by an authorized INFINITI dealer.
I
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 RS section.
I
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for Steering System
NBST0002
I
Before disassembly, thoroughly clean the outside of the unit.
I
Disassembly should be done in a clean work area. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
I
Place disassembled parts in order, on a parts rack, for easier and proper assembly.
I
Use nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might
interfere with their operation.
I
Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable
solvent.
I
Before assembly, apply a coat of recommended power steering fluid* to hydraulic parts. Vaseline
may be applied to O-rings and seals. Do not use any grease.
I
Replace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during instal-
lation. Perform functional tests whenever designated.
*: Genuine Nissan PSF II or equivalent. Refer to MA-11, “Fluids and Lubricants”.
PRECAUTIONS
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
ST-2
Special Service Tools
NBST0003
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Description
KV48100700
(J26364)
Torque adapter
NT169
Measuring pinion rotating torque
ST35300000
(
—
)
Drift
NT073
Installing power steering oil pump oil seal
a: 59 mm (2.32 in) dia.
b: 45 mm (1.77 in) dia.
ST27180001
(J25726-A)
Steering wheel puller
NT544
Removing steering wheel
ST29020001
(J24319-01)
Ball joint remover
NT694
Removing ball joint
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
KV48103500
(J26357 and J26357-10)
Pressure gauge
NT547
Measuring oil pressure
KV48102500
(
—
)
Pressure gauge adapter
NT542
Measuring oil pressure
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PREPARATION
Special Service Tools
ST-3
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