General Diagnosis - Isuzu Trooper 1999 Workshop Manual

control arm are attached to the frame by bolts passing
through the bushings, which are pressed in the frame.
Side roll of the front suspension is controlled by a spring
steel stabilizer bar. It is mounted in rubber bushings,

General Diagnosis

Condition
Vehicle Pulls
Abnormal or Excessive Tire Wear
Wheel Hop
Shimmy, Shake or Vibration
which are held to the crossmember by brackets. The ends
of the stabilizer bar are connected to the lower control
arms by links.
Possible cause
Mismatched or uneven tires.
Tires not adequately inflated.
Broken or sagging springs.
Radial tire lateral force.
Improper wheel alignment.
Brake dragging in one wheel.
Loose, bent or broken front or rear
suspension parts.
Faulty shock absorbers.
Sagging or broken spring.
Tire out of balance.
Improper wheel alignment.
Faulty shock absorber.
Hard driving.
Overloaded vehicle.
Tires not rotated periodically.
Worn or loose road wheel bearings.
Wobbly wheel or tires.
Tires not adequately inflated.
Blister or bump on tire.
Improper shock absorber operation.
Tire or wheel out of balance.
Loose wheel bearings.
Worn steering linkage ball joints.
Worn upper or lower ball joints.
Excessive wheel runout.
Blister or bump on tire.
Excessive loaded radial runout of
tire/wheel assembly.
Improper wheel alignment.
Loose or worn steering linkage.
Loose steering gear.
Tires not adequately inflated.
Loose, bent or broken front or rear
suspension parts.
Faulty shock absorber.
Hub bearing preload misadjustment.
FRONT SUSPENSION
Correction
Replace tire.
Adjust tire pressure.
Replace spring.
Replace tire.
Adjust wheel alignment.
Repair brake.
Tighten or replace the appropriate
suspension part(s).
Replace shock absorber.
Replace spring.
Balance or replace tire.
Check front end alignment.
Replace shock absorber.
Replace tire.
Replace tire and reduce load.
Replace or rotate tire.
Replace wheel bearing.
Replace wheel or tire.
Adjust the pressure.
Replace tire.
Replace shock absorber.
Balance wheels or replace tire/or
wheel.
Replace wheel bearing.
Replace ball joints.
Replace ball joints.
Repair or replace wheel and/or tire.
Replace tire.
Replace tire or wheel.
Check wheel alignment.
Tighten or replace steering linkage.
Tighten housing bolts.
Adjust tire pressure.
Tighten or replace the appropriate
suspension parts.
Replace shock absorber.
Adjust preload.
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