Infiniti Q45. Manual — part 746
PS-1
POWER STEERING SYSTEM
G STEERING
CONTENTS
C
D
E
F
H
I
J
K
L
M
SECTION
PS
A
B
PS
POWER STEERING SYSTEM
PRECAUTIONS . . . . . . . . . . . . . . .. 2
PREPARATION . . . . . . . . . . . . . . ... 3
Special Service Tools . . . . . . . . . . . ... 3
Commercial Service Tools . . . . . . . . . . 4
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING . . . . . . . . . . . . 5
NVH Troubleshooting Chart . . . . . . . . . . 5
POWER STEERING FLUID . . . . . . . . . . 6
STEERING WHEEL . . . . . . . . . . . . . 8
On-Vehicle Service . . . . . . . . . . . . ... 8
Removal and Installation . . . . . . . . . . 10
REMOVAL . . . . . . . . . . . . . . ... 10
INSTALLATION . . . . . . . . . . . . ... 10
STEERING COLUMN . . . . . . . . . . . . 11
Removal and Installation . . . . . . . . . . .11
Disassembly and Assembly . . . . . . . . ... 13
POWER STEERING GEAR . . . . . . . . . .. 15
Removal and Installation . . . . . . . . . . 15
Disassembly and Assembly . . . . . . . . . 17
POWER STEERING OIL PUMP . . . . . . . ... 26
On-Vehicle Service . . . . . . . . . . . . . 26
RELIEF OIL PRESSURE . . . . . . . . . 26
Removal and Installation . . . . . . . . . . 27
Disassembly and Assembly . . . . . . . . . 28
HYDRAULIC LINE . . . . . . . . . . . . . 32
Removal and Installation . . . . . . . . . . 32
SERVICE DATA AND SPECIFICATIONS (SDS) . .. 34
General Specifications . . . . . . . . . . . 34
Inspection and Adjustment . . . . . . . . . . 34
PS-2
PRECAUTIONS
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NGS0002J
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 System
NGS0002K
●
In case of removing steering gear assembly, make the final tightening with grounded and unloaded vehi-
cle condition, and then check wheel alignment.
●
Observe the following precautions when disassembling.
–
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.
–
Do not reuse non-reusable parts.
–
Before assembling, apply the specified grease to the directed parts.
PREPARATION
PS-3
C
D
E
F
H
I
J
K
L
M
A
B
PS
PREPARATION
PFP:00002
Special Service Tools
NGS00040
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
ST27180001
(J-25726-A)
Steering wheel puller
a: 29 mm (1.14 in)
b: M10
×
1.25P
c: M8
×
1.25P
Removing steering wheel
ST3127S000
(J-25765-A)
●
Inspecting sliding torque
●
Inspecting steering torque
●
Inspecting rotating torque for ball joint
KV48104400
(
—
)
Teflon ring correcting tool
a: 50 mm (1.97 in)
b: 58 mm (2.28 in)
c: 100 mm (3.94 in)
d: 36 mm (1.42 in)
Installing rack Teflon ring
KV48103400
(
—
)
Torque adapter
Inspecting pinon rotating torque
KV48103500
(J-26357 and J-26357-10)
Pressure gauge
Measuring power steering oil pump relief
pressure
KV48102500
(J-33914)
Pressure gauge adapter
Measuring power steering oil pump relief
pressure
SGIA1385E
ZZA0806D
SGIA1386E
ZZA0824D
S-NT547
S-NT542
PS-4
PREPARATION
Commercial Service Tools
NGS00041
Tool name
Description
Power tool
Loosening nuts and bolts
PBIC0190E
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