Subaru IMPREZA GD 2007 Series Manual page 3521

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6. General Diagnostic Table
A: INSPECTION
Symptoms
Front wheel abnormal rolling Tire wear or improper air pressure
Abnormal tire wear
Yawing / pitching
Yawing / rolling
General Diagnostic Table
Possible cause
Wheel is out of balance.
Tire improper air pressure
Tire wear or improper air pressure
Tire wear or improper air pressure
WT-9
WHEEL AND TIRE SYSTEM
Corrective action
Replace the tire in case of tire wear.
Adjust air pressure in case of
improper air pressure.
Adjust.
Replace.
Replace the tire in case of tire wear.
Adjust air pressure in case of
improper air pressure.
Replace the tire in case of tire wear.
Adjust air pressure in case of
improper air pressure.