Subaru 2002 IMPREZA Service Manual page 1940

REAR SUSPENSION
8. General Diagnostic Table
A: INSPECTION
1. IMPROPER VEHICLE POSTURE OR IMPROPER WHEEL ARCH HEIGHT
(1) Permanent distortion or breakage of coil spring
(2) Unsmooth operation of damper strut and/or shock absorber
(3) Installation of wrong strut and/or shock absorber
(4) Installation of wrong coil spring
2. POOR RIDE COMFORT
1) Large rebound shock
2) Rocking of the vehicle continues too long after running over bump and/or hump.
3) Large shock in bumping
(1) Breakage of coil spring
(2) Overinflation pressure of tire
(3) Improper wheel arch height
(4) Fault in operation of damper strut and/or shock absorber
(5) Damage or deformation of strut mount and/or shock absorber mount
(6) Unsuitability of maximum and/or minimum length of damper strut and/or
shock absorber
(7) Deformation or loss of bushing
(8) Deformation or damage of helper in strut assembly and/or shock
absorber
(9) Oil leakage of damper strut and/or shock absorber
3. NOISE
(1) Wear or damage of damper strut and/or shock absorber component parts Replace.
(2) Loosening of suspension link installing bolt
(3) Deformation or loss of bushing
(4) Unsuitability of maximum and/or minimum length of damper strut and/or
shock absorber
(5) Breakage of coil spring
(6) Wear or damage of ball joint
(7) Deformation of stabilizer clamp
GENERAL DIAGNOSTIC TABLE
Possible causes
Possible causes
Possible causes
Replace.
Replace.
Replace with proper parts.
Replace with proper parts.
Replace.
Adjust.
Adjust or replace the coil springs with new ones.
Replace.
Replace.
Replace with proper parts.
Replace.
Replace.
Replace.
Retighten to the specified torque.
Replace.
Replace with proper parts.
Replace.
Replace.
Replace.
RS-22
Countermeasures
Countermeasures
Countermeasures