NVH Troubleshooting Chart
Use the chart below to help you ®nd the cause of the symptom. If necessary, repair or replace these parts.
Reference pageRA-4
RA-14
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Ð
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RA-12
RA-15
RA-5
NVH in PD section
NVH in PD section
NVH in FA section
Refer to REAR AXLE AND REAR SUSPENSION in this chart.
NVH in FA section
NVH in FA section
NVH in FA section
NVH in BR section
NVH in ST section
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation, damage or de¯ection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Stabilizer bar fatigue
Wheel bearing damage
PROPELLER SHAFT
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEEL
AXLE SHAFT
BRAKES
STEERING
SymptomREAR
AXLE AND
REAR
SUSPEN-
SIONNoiseXXXXXX XXX XXXXX
ShakeXXXX X X X XXXXX
VibrationXXXXXXXXXX
ShimmyXXXX X XX XX
Judder X X X X X X X X
Poor quality ride or handlingXXXXX XX X XX
X: Applicable
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
RA-3
Checking Steering Wheel Play
+With wheels in a straight-ahead position, check steering wheel
play.
Steering wheel play:
35 mm (1.38 in) or less
+If it is not within speci®cation, check the following for loose and
worn components.
Steering gear assembly
Steering linkage
Steering column
Front suspension and axle
Checking Neutral Position on Steering Wheel
Pre-checking
+Make sure that wheel alignment is correct.
Wheel alignment:
Refer to SDS in FA section.
+Verify that the steering gear is centered before removing the
steering wheel.
Checking
1. Check that the steering wheel is in the neutral position when
driving straight ahead.
2. If it is not in the neutral position, remove the steering wheel and
reinstall it correctly.
3. If the neutral position is between two teeth, loosen drag link lock
nuts. Adjust neutral position by turning drag link adjuster.
Front Wheel Turning Angle
1. Rotate steering wheel all the way right and left; measure turn-
ing angle.
Turning angle of full turns:
Refer to SDS in FA section.
2. If not within speci®cation, adjust using stopper bolt.
SST489B
SST490BA
SST756C
SMA127
SST773C
ON-VEHICLE SERVICE
ST-4
