Infiniti FX35 / FX45. Manual — part 866
PS-6
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
INFOID:0000000001327708
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×
: Applicable
Reference page
,
NVH in PR section
NVH in RFD section
NVH in F
AX, RAX, FSU, RSU section
NVH in WT section
NVH in WT section
NVH in F
AX section
NVH in BR section
Possible cause and suspected parts
Fl
uid
le
vel
Ai
r in
hy
dra
u
lic
sy
s
tem
Out
e
r socket b
a
ll j
o
in
t swin
gi
ng
force
Out
e
r socket b
a
ll j
o
in
t ro
ta
tin
g
t
o
rq
ue
Ou
te
r so
cke
t ba
ll jo
int
en
d pl
a
y
S
tee
ring
fl
ui
d l
e
a
k
a
g
e
S
tee
ring
wh
ee
l p
lay
S
te
e
ri
n
g
ge
ar ra
ck
s
lid
in
g f
o
rc
e
Dri
ve
b
e
lt
lo
os
en
es
s
Im
p
rop
er st
e
e
ri
ng
whe
e
l
Im
pro
pe
r in
st
all
at
ion
o
r lo
os
en
es
s
of t
ilt
lo
ck
le
ve
r
Mo
un
ti
n
g
ru
bb
er d
e
te
ri
o
rat
io
n
S
tee
ring
c
o
lu
m
n
d
e
fo
rm
ati
o
n
or
da
ma
ge
Im
pro
p
e
r in
st
all
a
tion
o
r lo
os
en
es
s
of s
te
e
ri
ng
co
lu
mn
S
tee
ring
li
nk
ag
e
loo
s
e
ne
s
s
PROPELLER S
H
AFT
DIFF
ERENTIAL
AXLE and SUSPENSI
ON
TI
RE
S
ROAD WHEE
L
DRIVE SHAFT
BRAKE
S
Symptom
STEERING
Noise
× × × × × × × × ×
× × × × × ×
×
Shake
× × ×
×
× × × ×
×
Vibration
× × × × ×
×
× ×
×
Shimmy
× × ×
×
× × ×
×
Judder
×
×
× × ×
×
POWER STEERING FLUID
PS-7
< SERVICE INFORMATION >
C
D
E
F
H
I
J
K
L
M
A
B
PS
N
O
P
POWER STEERING FLUID
Checking Fluid Level
INFOID:0000000001327709
• Stop engine before performing a fluid level check.
• Ensure that fluid level is between the MAX range and MIN level.
• Because fluid level differs within the HOT range and the COLD
range, check it carefully.
CAUTION:
• Do not overfill the Max level.
• Do not reuse any used power steering fluid.
• For recommended fluid, refer to
.
Checking Fluid Leakage
INFOID:0000000001327710
Check the hydraulic piping lines for improper attachment and for
leaks, cracks, damage, loose connections, chafing or deterioration.
1.
Run engine until fluid temperature reaches 50 to 80
°
C (122 to
176
°
F) in reservoir tank. Keep engine speed idle.
2.
Turn steering wheel right-to-left several times.
3.
Hold steering wheel at each “lock” position for five seconds to
check fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 10 seconds. (There is the possibility that oil pump may
be damaged.)
4.
If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten con-
nector as this can damage O-ring, washer and connector.
5.
If fluid leakage from oil pump is noticed, check oil pump. Refer to
.
6.
Check steering gear boots for accumulation of fluid indicating a from steering gear.
Air Bleeding Hydraulic System
INFOID:0000000001327711
Incomplete air bleeding causes the following. When this happens, bleed air again.
• Generation of air bubbles in reservoir tank.
• Generation of clicking noise in oil pump.
• Excessive buzzing in oil pump.
NOTE:
When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from oil
pump or gear. This noise is normal and does not affect any system.
1.
Stop engine, and then turn steering wheel fully to right and left several times.
CAUTION:
Do not allow steering fluid reservoir tank to go below the low-level line. Check tank frequently and
add fluid as needed.
2.
Run engine at idle speed. Turn steering wheel fully to the right and then fully to the left, and keep for about
three seconds. Then check whether a fluid leakage has occurred.
3.
Repeat the 2nd procedure several times at about three seconds intervals.
CAUTION:
Do not hold steering wheel in the locked position more than 10 seconds. (There is the possibility
that oil pump may be damaged.)
4.
Check generation of air bubbles and cloud in fluid.
5.
If air bubbles and the cloud don't fade, stop engine, hold air bleeding until air bubbles and the cloud fade.
Perform the 2nd and the 3rd procedures again.
HOT
: Fluid temperatures from 50 to 80
°
C (122 to
176
°
F)
COLD
: Fluid temperatures from 0 to 30
°
C (32 to 86
°
F)
SGIA0232J
SGIA0506E
PS-8
< SERVICE INFORMATION >
POWER STEERING FLUID
6.
Stop engine, check fluid level.
STEERING WHEEL
PS-9
< SERVICE INFORMATION >
C
D
E
F
H
I
J
K
L
M
A
B
PS
N
O
P
STEERING WHEEL
On-Vehicle Inspection and Service
INFOID:0000000001327712
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 bolts for steering gear assembly are loose or
not. Refer to
.
CHECKING STEERING WHEEL PLAY
1.
Set tires to the straight ahead, start engine, then turn steering wheel to the left and right lightly, and mea-
sure 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
1.
Set vehicle to the straight direction, 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 adjust in the two teeth of steering gear assembly, loosen outer socket lock
nuts of steering outer sockets, then adjust outer socket by the same amount in the opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1.
Park vehicle on a level and dry surface, set parking brake.
2.
Start engine.
3.
Bring power steering fluid up to adequate operating temperature. [Make sure temperature of fluid is
approximately 50 to 80
°
C (122 to 176
°
F).]
NOTE:
Tires need to be inflated normal pressure.
4.
Check steering wheel turning force when steering wheel has
been turned 360
°
from neutral position.
NOTE:
Multiply the distance L from the hook of spring balance to the
center of steering wheel by the measurement value with a spring
balance.
5.
If steering wheel turning force is out of the specification, check
rack sliding force and relief hydraulic pressure of oil pump.
Regarding relief hydraulic pressure of oil pump, refer to
PS-27, "On-Vehicle Inspection and Service"
End play of the axle direction for steering wheel
: 0 mm (0 in)
SGIA0546E
Steering wheel play on the outer circumference
: 0
−
35 mm (0
−
1.38 in)
Steering wheel turning force
: Less than 7.45 N·m (0.76 kg-m, 66 in-lb)
SGIA1136E
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