Infiniti F50. Manual — part 704
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
PS-5
C
D
E
F
H
I
J
K
L
M
A
B
PS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
PFP:00003
NVH Troubleshooting Chart
EGS00081
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×
: Applicable
Reference page
—
—
—
NVH
in
PR s
e
c
tio
n
NVH
in
RFD s
e
c
tio
n
NVH in
F
AX, RAX
,
FSU a
n
d
RSU s
e
c
ti
o
n
NVH in
W
T
s
e
c
ti
o
n
NVH in
W
T
s
e
c
ti
o
n
NVH
in
RAX s
e
c
tio
n
Possible cause and SUSPECTED PARTS
Flui
d
lev
e
l
Ai
r
in
hy
dr
a
u
lic
sy
st
em
T
ie-
ro
d
b
a
ll j
o
in
t sw
ingi
ng f
o
rc
e
T
ie
-ro
d
b
a
ll jo
in
t ro
ta
ti
n
g
to
rq
u
e
T
ie-
ro
d
b
a
ll j
o
in
t end
pl
ay
S
tee
ri
ng gea
r f
lui
d l
e
akag
e
S
tee
ri
ng w
hee
l pl
ay
S
tee
ri
ng gea
r r
a
c
k
sl
id
in
g
f
o
rc
e
D
ri
v
e be
lt
l
o
o
s
ene
ss
Im
pr
ope
r st
eer
in
g
w
h
eel
Im
pr
ope
r i
n
st
al
la
ti
on or
l
oos
enes
s or
t
ilt
l
o
ck
l
e
ve
r
M
ount
ing r
u
b
ber
de
te
ri
or
at
io
n
S
tee
ri
ng col
u
m
n
def
or
m
a
ti
on
or
dam
age
Im
pr
ope
r i
n
st
al
la
ti
on or
l
oos
enes
s of
st
eer
ing col
u
m
n
S
tee
ri
ng l
ink
age l
oose
ness
PROPELLER SHAFT
DI
FF
ERENTI
AL
AXLE AND
S
U
S
PENSI
ON
TIR
E
S
ROAD W
H
EEL
DRI
VE SHAFT
BRAKES
Symptom
STEERING
Noise
× × × × × × × × ×
× × × × × ×
×
Shake
× × ×
×
× × × ×
×
Vibration
× × × × ×
×
× ×
×
Shimmy
× × ×
×
× × ×
×
Judder
×
×
× × ×
×
PS-6
POWER STEERING FLUID
POWER STEERING FLUID
PFP:KLF20
Checking Fluid Level
EGS0006W
●
Check fluid level with dipstick on reservoir cap. Use “HOT”
range at fluid temperatures from 50 to 80
°
C (122 to 176
°
F). Use
“COLD” range at fluid temperatures from 0 to 30
°
C (32 to 86
°
F).
CAUTION:
●
Do not overfill.
●
Recommended fluid is Genuine Nissan PSF or equiva-
lent.
Checking Fluid Leakage
EGS0006X
Check lines for improper attachment and for leaks, cracks, damage,
loose connections, chafing or deterioration.
1.
Run engine at idle speed or 1,000 rpm.
Make sure temperature of fluid in oil tank rises to 60 to 80
°
C
(140 to 176
°
F)
2.
Turn steering wheel right-to-left several times.
3.
Hold steering wheel at each “lock” position for five seconds and
carefully check for fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 15 seconds.
4.
If fluid leakage at connectors is noticed, loosen flare nut and then retighten.
Do not overtighten connector as this can damage O-ring, washer and connector.
5.
If fluid leakage from power steering pump is noticed, check power steering pump. Refer to
6.
Check rack boots for accumulation of power steering fluid.
Bleeding Hydraulic System
EGS0006Y
1.
Raise front end of vehicle until wheels clear ground.
Add fluid into oil tank to specified level. Meanwhile, quickly turn steering wheel fully to right and left and
lightly touch steering stoppers.
Repeat steering wheel operation until fluid level no longer decreases.
2.
Start engine.
Repeat step 2 above.
●
Incomplete air bleeding will cause the following to occur. When this happens, bleed air again.
a.
Generation of air bubbles in reservoir tank
b.
Generation of clicking noise in oil pump
c.
Excessive buzzing in oil pump
Fluid noise may occur in valve or oil pump. This is common when vehicle is stationary or while turning steering
wheel slowly. This does not affect performance or durability of system.
PGIA0007J
SST836C
STEERING WHEEL
PS-7
C
D
E
F
H
I
J
K
L
M
A
B
PS
STEERING WHEEL
PFP:48430
On-Vehicle Service
EGS0006Z
CHECKING STEERING WHEEL PLAY
●
With wheels in a straight-ahead position, check steering wheel
play.
●
If it is not within specification, check following for loose or worn
components.
Steering gear assembly
Steering column
Front suspension and axle
●
Check steering wheel for vertical, horizontal or axial play
CHECKING NEUTRAL POSITION ON STEERING WHEEL
Pre-Checking
●
Make sure that wheel alignment is correct.
●
Verify that steering gear is centered before removing steering wheel.
Checking
1.
Check that steering wheel is in neutral position when driving straight ahead.
2.
If it is not in neutral position, remove steering wheel and reinstall it correctly.
3.
If neutral position is between two teeth, loosen tie-rods locknuts. Turn tie-rods by the same amount in
opposite directions both left and right sides.
CHECKING STEERING WHEEL TURNING FORCE
1.
Park vehicle on a level, dry surface and set parking brake.
2.
Start engine.
3.
3. Bring power steering fluid up to adequate operating tempera-
ture. [Make sure temperature of fluid is approximately 60 to
80
°
C (140 to 176
°
F).]
Tires need to be inflated normal pressure.
4.
Check steering wheel turning force when steering wheel has
been turned 360
°
from neutral position.
5.
If steering wheel turning force is out of specification, check rack
sliding force.
a.
Disconnect steering column lower joint and knuckle arms from
gear.
b.
Start and run engine at idle to make sure steering fluid has
reached normal operating temperature.
c.
While pulling tie-rod slowly in the
±
11.5 mm (
±
0.453 in) range
from neutral position, make sure rack sliding force is within
specification.
d.
Check sliding force outside above range.
e.
If rack sliding force is not within specification, overhaul steering gear assembly.
Steering wheel play
: 0 - 35 mm (0 - 1.38 in) or less
Steering wheel axial end play
: 0 mm (0 in)
SST489B
Wheel alignment
: Refer to
FSU-6, "Wheel Alignment Inspection"
Steering wheel turning force
: 36 N (3.7kg, 8.2lb) or
less
SST491B
Rack sliding force
: 255- 294 N (26-30 kg, 57 - 66 lb)
Rack sliding force
: Not more than 294 N (30kg, 66lb)
SST090B
PS-8
STEERING WHEEL
FRONT WHEEL TURNING ANGLE
Check front wheel turning angle after toe-in inspection, Place the
front wheels on turning radius gauges and rear wheels on stands so
that vehicle can be level. Check maximum inner and outer wheel
turning angles for LH and RH road wheels.
●
Start engine. With engine at idle, rotate steering wheel all the
way right and left; measure turning angle.
●
If it is not within specification, measure the rack stroke.
●
If the rack stroke is outside of specification, disassemble steer-
ing gear to check rack stroke.
●
Turning angles are not adjustable. If any of steering angles is
not within specification, check following components for wear or
damage.
–
Steering gear
–
Steering column
–
Front suspension components
SMA127
Turning angle of full turns:
Inner wheel (Angle: A)
Minimum
: 41
°
45
′
(41.75
°
)
Nominal
: 42
°
45
′
(42.75
°
)
Maximum
: 45
°
45
′
(45.75
°
)
Outer wheel (Angle: B)
Nominal
: 33
°
50
′
(33.83
°
)
SGIA0055E
Rack stroke
: 68.5 mm (2.697 in)
SST307BA
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