Subaru 2009 IMPREZA Service Manual page 2241

9. General Diagnostic Table
A: INSPECTION
Symptoms
Wheel is out of balance.
Vehicle is abnormally out of
balance.
Abnormal wheel vibration
General Diagnostic Table
Possible cause
Improperly inflated tire.
Uneven wear
Front wheel alignment
Rear wheel alignment
Front strut
Rear shock absorber
Front axle
Front hub unit bearing
Rear hub unit bearing
Improperly inflated tire.
Uneven wear
Front stabilizer
Front wheel alignment
Rear wheel alignment
Improperly inflated tire.
Uneven wear
Improper wheel balancing
Front axle
Front hub unit bearing
Rear hub unit bearing
WT-15
WHEEL AND TIRE SYSTEM
Corrective action
Adjust the tire pressure.
Check the tire referring to Abnormal
tire wear in this table, carry out the
procedure and replace the tire.
Check the front wheel alignment.
<Ref. to FS-7, INSPECTION, Wheel
Alignment.>
Check the rear wheel alignment.
<Ref. to RS-8, INSPECTION, Wheel
Alignment.>
Check the front strut. <Ref. to FS-
24, INSPECTION, Front Strut.>
Check the rear shock absorber.
<Ref. to RS-14, INSPECTION, Rear
Shock Absorber.>
Check the front axle. <Ref. to DS-
16, INSPECTION, Front Axle.>
Check the front hub unit bearing.
<Ref. to DS-18, INSPECTION, Front
Hub Unit Bearing.>
Check the rear hub unit bearing.
<Ref. to DS-25, INSPECTION, Rear
Hub Unit Bearing.>
Adjust the tire pressure.
Check the tire referring to Abnormal
tire wear in this table, carry out the
procedure and replace the tire.
Inspect the front stabilizer. <Ref. to
FS-16, INSPECTION, Front Stabi-
lizer.>
Check the front wheel alignment.
<Ref. to FS-7, INSPECTION, Wheel
Alignment.>
Check the rear wheel alignment.
<Ref. to RS-8, INSPECTION, Wheel
Alignment.>
Adjust the tire pressure.
Check the tire referring to Abnormal
tire wear in this table, carry out the
procedure and replace the tire.
Check the wheel balance. <Ref. to
WT-9, ADJUSTMENT, Wheel Bal-
ancing.>
Check the front axle. <Ref. to DS-
16, INSPECTION, Front Axle.>
Check the front hub unit bearing.
<Ref. to DS-18, INSPECTION, Front
Hub Unit Bearing.>
Check the rear hub unit bearing.
<Ref. to DS-25, INSPECTION, Rear
Hub Unit Bearing.>