NVH Troubleshooting Chart
Use the chart below to help you ®nd the cause of the symptom. If necessary, repair or replace these parts.
Reference pageST-5
ST-6
ST-20
ST-20
ST-20
ST-5
ST-4
ST-6
Refer to MA section.
Ð
ST-11
ST-11
ST-10
ST-19
NVH in PD section
NVH in PD section
NVH in FA, RA section
NVH in FA section
NVH in FA section
NVH in FA section
NVH in BR section
Possible cause and
SUSPECTED PARTS
Fluid level
Air in hydraulic system
Tie-rod ball joint swinging force
Tie-rod ball joint rotating torque
Tie-rod ball joint end play
Steering gear ¯uid leakage
Steering wheel play
Steering wheel turning force
Drive belt looseness
Improper steering wheel or damage
Improper installation or looseness of tilt lock lever
Steering column deformation
Improper installation or looseness of steering column
Steering linkage looseness
PROPELLER SHAFT
DIFFERENTIAL
AXLE AND SUSPENSION
TIRES
ROAD WHEEL
AXLE SHAFT
BRAKES
Symptom STEERINGNoiseXXXXXXXXX XXXXXXX
Shake X X XXXXXX
VibrationXXXXXXXX
Shimmy X X X X X X X
Judder X X X X X
X: Applicable
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
ST-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
