
Noise, Vibration and Harshness (NVH)
Troubleshooting
=NLSU0004NVH TROUBLESHOOTING CHARTNLSU0004S01Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
Reference page
SU-5, 18
SU-11, 23
—
—
—
SU-10, 22
SU-8
SU-12
SU-8
—
—
—
—
—
—
AX-10
AX-3, AX-22
Refer to SUSPENSION
in this chart.
Refer to TIRES
in this chart.
Refer to ROAD WHEEL
in this chart.
BR-6
ST-5
Possible Cause
and SUSPECTED
PA R T S
Improper installation, looseness
Shock absorber deformation,
damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
Out-of-round
Imbalance
Incorrect air pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
DRIVE SHAFT
AXLE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING Symptom
SUSPENSION
Noise× × ×××× ×× × × ××
Shake× × ×× × ×× × × ××
Vibration× × ××× ×× × ×
Shimmy×××× × × × ×××
Judder××× × × ×××
Poor quality
ride or han-
dling× × ××× ×× × × ×
TIRES
Noise× ×××××× ×× × × ××
Shake× ××××× ××× × × ××
Vibration× ××× × ×
Shimmy× ××××××× × × × ××
Judder× ××××× × × × × ××
Poor quality
ride or han-
dling× ××××× × × × ×
ROAD WHEEL
Noise× ×××××××××
Shake× ×××××××××
Shimmy,
Judder×××××××××
Poor quality
ride or han-
dling×××××××
×: Applicable
FRONT SUSPENSION
Noise, Vibration and Harshness (NVH) Troubleshooting
SU-4

SMA525A
On-vehicle Service
FRONT SUSPENSION PARTSNLSU0006Check front axle and front suspension parts for excessive play,
cracks, wear or other damage.
+Shake each front wheel to check for excessive play.
+Make sure that cotter pin is inserted.
+Retighten all axle and suspension nuts and bolts to the speci-
fied torque.
Tightening torque:
Refer to “FRONT SUSPENSION”, SU-5.
SFA392B
+Check strut (shock absorber) for oil leakage or other damage.
+Check suspension ball joint for grease leakage and ball joint
dust cover for cracks or other damage.
If ball joint dust cover is cracked or damaged, replace trans-
verse link.
SFA818AA
+Check spring height from top of wheelarch to the ground.
a) Vehicle must be unladen*, parked on a level surface, and tires
checked for proper inflation and wear (tread wear indicator
must not be showing).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
b) Bounce vehicle up and down several times before measuring.
Standard height: Refer to SDS, SU-16.
c) Spring height is not adjustable. If out of specification, check for
worn springs or suspension parts.
SSU031
+Check suspension ball joint end play.
a) Jack up front of vehicle and set the stands.
b) Clamp dial indicator onto transverse link and place indicator tip
on lower edge of brake caliper.
c) Make sure front wheels are straight and brake pedal is
depressed.
d) Place a pry bar between transverse link and inner rim of road
wheel.
e) While raising and releasing pry bar, observe maximum dial
indicator value.
Vertical end play: 0 mm (0 in)
f) If ball joint movement is beyond specifications, remove and
replace it.
BALANCING WHEELSNLSU0042+Adjust wheel balance using road wheel center.
Wheel balance (Maximum allowable unbalance):
Refer to SDS, SU-16.
FRONT SUSPENSION
On-vehicle Service
SU-6

SFA975B
Preliminary InspectionNLSU0042S01Aluminum wheelNLSU0042S01011. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage.
If deformed, remove wheel and check wheel runout.
a. Remove tire from aluminum wheel and mount on a tire balance
machine.
b. Set dial indicator as shown in the illustration.
Wheel runout (Dial indicator value):
Refer to SDS, SU-16.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
SFA981B
Steel wheelNLSU0042S01021. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage.
If deformed, remove wheel and check wheel runout.
a. Remove tire from steel wheel and mount wheel on a tire bal-
ance machine.
b. Set two dial indicators as shown in the illustration.
c. Set each dial indicator to 0.
d. Rotate wheel and check dial indicators at several points
around the circumference of the wheel.
e. Calculate runout at each point as shown below.
Radial runout = (A + B)/2
Lateral runout = (C + D)/2
f. Select maximum positive runout value and the maximum
negative value.
Add the two values to determine total runout.
In case a positive or negative value is not available, use the
maximum value (negative or positive) for total runout.
If the total runout value exceeds the limit, replace steel wheel.
Wheel runout:
Refer to SDS, SU-16.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
FRONT SUSPENSION
On-vehicle Service (Cont’d)
SU-7

SMA829C
TIRE ROTATIONNLSU0043+Do not include the T-type spare tire when rotating the tires.
Wheel nuts:
:98-118N·m (10.0 - 12.0 kg-m, 72 - 87 ft-lb)
FRONT WHEEL ALIGNMENTNLSU0045Before checking front wheel alignment, be sure to make a prelimi-
nary inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand
tools and mats in designated positions.
SRA096A
Camber, Caster and Kingpin InclinationNLSU0045S01Camber, caster and kingpin inclination are preset at factory
and cannot be adjusted.
1. Measure camber, caster and kingpin inclination of both right
and left wheels with a suitable alignment gauge.
Camber, caster and kingpin inclination:
Refer to SDS, SU-15.
2. If camber, caster or kingpin inclination is not within
specification, inspect front suspension parts. Replace dam-
aged or worn out parts.
AFA050
Toe-inNLSU0045S02Measure toe-in using the following procedure.
WARNING:
+Always perform the following procedure on a flat surface.
+Make sure that no person is in front of the vehicle before
pushing it.
1. Bounce front of vehicle up and down to stabilize the posture.
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of tread (rear side) of both tires at the
same height as hub center. These are measuring points.
SFA234AC
4. Measure distance“A”(rear side).
5. Push the vehicle slowly ahead to rotate the wheels 180
degrees (1/2 turn).
If the wheels have rotated more than 180 degrees (1/2 turn), try
the above procedure again from the beginning. Never push
vehicle backward.
6. Measure distance“B”(front side).
Total toe-in:
Refer to SDS, SU-15.
FRONT SUSPENSION
On-vehicle Service (Cont’d)
SU-8

SFA181A
Transverse Link and Lower Ball Joint
REMOVAL AND INSTALLATIONNLSU00181. Remove wheel bearing lock nut.
2. Remove tie-rod ball joint.
3. Remove strut lower bracket fixing bolts and nuts.
4. Separate drive shaft from knuckle by slightly tapping drive
shaft end.
Cover boots with shop towel so as not to damage them when
removing drive shaft.
SFA113AD
5. Separate lower ball joint stud from knuckle with suitable tool.
Refer to AX-5,“FRONT AXLE—Wheel Hub and Knuckle”.
SSU033
6. Remove fixing bolts.
7. Remove transverse link and lower ball joint.
8. During installation, final tightening must be carried out at curb
weight with tires on the ground.
Tightening torque:
Refer to“FRONT SUSPENSION”, SU-10.
9. After installation, check wheel alignment. Refer to“ON-VE-
HICLE SERVICE—Front Wheel Alignment”, SU-8.
INSPECTIONNLSU0019Transverse LinkNLSU0019S01+Check transverse link for damage, cracks or deformation.
Replace it if necessary.
+Check rubber bushing for damage, cracks and deformation.
Replace transverse link if necessary.
SFA858A
Lower Ball JointNLSU0019S02+Check ball joint for play. Replace transverse link assembly if
any of the following cases occur. Ball stud is worn, play in axial
direction is excessive or joint is hard to swing.
Before checking, turn ball joint at least 10 revolutions so that
ball joint is properly broken in.
Swinging force“A”:
(measuring point: cotter pin hole of ball stud):
7.8 - 82.4 N (0.8 - 8.4 kg, 1.8 - 18.5 lb)
Turning torque“B”:
0.50 - 4.90 N·m (5.1 - 50 kg-cm, 4.4 - 43.4 in-lb)
FRONT SUSPENSION
Transverse Link and Lower Ball Joint
SU-13

SBR686C
Precautions
PRECAUTIONSNLSU0024+When installing each rubber part, final tightening must be
carried out under unladen condition* with tires on ground.
Oil will shorten the life of rubber bushes. Be sure to wipe
off any spilled oil.
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
+Use flare nut wrench when removing or installing brake
tubes.
+After installing removed suspension parts, check wheel
alignment.
+Do not jack up at the trailing arm and lateral link.
+Always torque brake lines when installing.
+Lock nuts are unreusable parts; always use new ones.
When replacing, do not wipe the oil off of the new lock nut
before tightening.
Preparation
COMMERCIAL SERVICE TOOLSNLSU0026
Tool name Description
Equivalent to
1 Flare nut crowfoot
2 Torque wrench
NT360
Removing and installing brake piping
a: 10 mm (0.39 in)
Spring compressor
NT717
Removing and installing coil spring
Noise, Vibration and Harshness (NVH)
Troubleshooting
NLSU0027Refer to“Noise, Vibration and Harshness (NVH) Troubleshooting”,
“FRONT SUSPENSION”, SU-4.
REAR SUSPENSION
Precautions
SU-17

SMA525A
On-vehicle Service
REAR SUSPENSION PARTSNLSU0029Check axle and suspension parts for excessive play, wear or dam-
age.
+Shake each rear wheel to check for excessive play.
SSU036
+Retighten all nuts and bolts to the specified torque.
Tightening torque:
Refer to“REAR SUSPENSION”, SU-18.
SMA113
+Check shock absorber for oil leakage or other damage.
+Check wheelarch height. Refer to“On-vehicle Service”,
“FRONT SUSPENSION PARTS”, SU-6.
REAR WHEEL ALIGNMENTNLSU0030Before checking rear wheel alignment, be sure to make a prelimi-
nary inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand
tools and mats in designated positions.
SFA975B
Preliminary InspectionNLSU0030S01Aluminum wheelNLSU0030S01011. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage. If
deformed, remove wheel and check wheel runout.
a. Remove tire from aluminum wheel and mount on a tire balance
machine.
b. Set dial indicator as shown in the illustration.
Wheel runout (Dial indicator value):
Refer to SDS, SU-16.
3. Check front wheel bearings for looseness.
REAR SUSPENSION
On-vehicle Service
SU-19

4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
SFA981B
Steel wheelNLSU0030S01021. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage.
If deformed, remove wheel and check wheel runout.
a. Remove tire from steel wheel and mount wheel on a tire bal-
ance machine.
b. Set two dial indicators as shown in the illustration.
c. Set each dial indicator to 0.
d. Rotate wheel and check dial indicators at several points
around the circumference of the wheel.
e. Calculate runout at each point as shown below.
Radial runout = (A + B)/2
Lateral runout = (C + D)/2
f. Select maximum positive runout value and the maximum
negative value.
Add the two values to determine total runout.
In case a positive or negative value is not available, use the
maximum value (negative or positive) for total runout.
If the total runout value exceeds the limit, replace steel wheel.
Wheel runout:
Refer to SDS, SU-16.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
SFA948A
CamberNLSU0030S02Camber is preset at factory and cannot be adjusted.
Camber:
Refer to SDS, SU-27.
+If the camber is not within specification, inspect and replace
any damaged or worn rear suspension parts.
REAR SUSPENSION
On-vehicle Service (Cont’d)
SU-20