Nissan Leaf. Manual — part 690
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
FSU-9
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
INFOID:0000000010119426
Use chart below to find the cause of the symptom. If necessary, repair or replace these parts.
×: Applicable
Reference
,
,
,
—
—
,
,
,
(WITH H
E
A
T
ED
STEE
R
ING WHEEL)
Possible cause and SUSPECTED PARTS
Im
p
rop
er i
ns
tal
la
tio
n,
loo
sene
ss
S
hoc
k ab
so
rbe
r d
efo
rma
tio
n,
da
ma
ge
o
r de
fle
ct
ion
B
us
hin
g
or m
ou
nt
ing
d
ete
rio
rati
on
P
art
s interference
S
pri
ng
fat
ig
ue
S
us
pe
ns
ion
lo
os
en
es
s
In
co
rrec
t wh
ee
l a
lig
nm
en
t
S
tab
iliz
er b
ar f
ati
gu
e
F
R
ONT AXLE
TI
RE
ROAD
WHEEL
DRIV
E SHAFT
BR
AK
E
S
T
EERING
Symptom
FRONT SUSPENSION
Noise
×
×
×
×
×
×
×
×
×
×
×
×
Shake
×
×
×
×
×
×
×
×
×
×
×
Vibration
×
×
×
×
×
×
×
×
×
Shimmy
×
×
×
×
×
×
×
×
×
×
Shudder
×
×
×
×
×
×
×
×
Poor quality ride or
handling
×
×
×
×
×
×
×
×
×
×
FSU-10
< PERIODIC MAINTENANCE >
FRONT SUSPENSION ASSEMBLY
PERIODIC MAINTENANCE
FRONT SUSPENSION ASSEMBLY
Inspection
INFOID:0000000010119427
COMPONENT PART
Check the mounting conditions (looseness, backlash) of each component and component conditions (wear,
damage) are normal.
Ball Joint Axial End Play
1. Set front wheels in a straight-ahead position.
2. Move axle side of transverse link in the axial direction by hand.
Check there is no end play.
CAUTION:
• Never depress brake pedal when measuring.
• Never perform with tires on level ground.
• Be careful not to damage ball joint boot. Never damage
the installation position by applying excessive force.
STRUT ASSEMBLY
Check for oil leakage, damage, and replace if necessary.
Axial end play
.
JSEIA0444ZZ
WHEEL ALIGNMENT
FSU-11
< PERIODIC MAINTENANCE >
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WHEEL ALIGNMENT
Inspection
INFOID:0000000010119428
DESCRIPTION
CAUTION:
• The adjustment mechanisms of camber, caster, and kingpin inclination angles are not included.
• If camber, caster, or kingpin inclination angle is outside the standard, check front suspension parts
for wear and damage. Replace suspect parts if a malfunction is detected.
• Kingpin inclination angle is reference value, no inspection is required.
Measure wheel alignment under unladen conditions.
NOTE:
“Unladen conditions” means that fluids and lubricants are full. Tire repair kit and mats are in designated posi-
tions.
PRELIMINARY CHECK
Check the following:
• Tires for improper air pressure and wear. Refer to
• Road wheels for runout.
• Wheel bearing axial end play. Refer to
.
• Transverse link ball joint axial end play. Refer to
.
• Strut operation.
• Each mounting part of axle and suspension for looseness and deformation.
• Each of suspension member, strut assembly and transverse link for cracks, deformation and other damage.
• Vehicle height (posture).
GENERAL INFORMATION AND RECOMMENDATIONS
• A four-wheel thrust alignment should be performed.
- This type of alignment is recommended for any NISSAN/INFINITI vehicle.
- The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel is
centered.
- The alignment rack itself should be capable of accepting any NISSAN/INFINITI vehicle.
- The rack should be checked to ensure that it is level.
• Check the machine is properly calibrated.
- Your alignment equipment should be regularly calibrated in order to give correct information.
- Check with the manufacturer of your specific equipment for their recommended Service/Calibration Sched-
ule.
ALIGNMENT PROCESS
IMPORTANT:
Use only the alignment specifications listed in this Service Manual.
• When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Never use these indicators.
- The alignment specifications programmed into your machine that operate these indicators may not be cor-
rect.
- This may result in an ERROR.
• Most camera-type alignment machines are equipped with both “Rolling Compensation” method and optional
“Jacking Compensation” method to “compensate” the alignment targets or head units. “Rolling Compensa-
tion” is the preferred method.
- If using the “Rolling Compensation” method, after installing the alignment targets or head units, push or pull
on the rear wheel to move the vehicle. Do not push or pull on the vehicle body.
- If using the “Jacking Compensation” method, after installing the alignment targets or head units, raise the
vehicle and rotate the wheels 1/2 turn both ways.
NOTE:
Do not use the “Rolling Compensation” method if you are using sensor-type alignment equipment.
- Follow all instructions for the alignment machine you're using for more information.
Adjustment
INFOID:0000000010119429
TOE-IN
• Loosen the steering outer socket, and then adjust the length using steering inner socket.
FSU-12
< PERIODIC MAINTENANCE >
WHEEL ALIGNMENT
CAUTION:
• Always evenly adjust both toe-in alternately and adjust the difference between the left and right to
the standard.
• Always fix the steering inner socket when tightening the steering outer socket.
• After toe-in adjustment, adjust neutral position of steering angle sensor. Refer to
.
Toe-in
: Refer to
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