Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Suspension system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Procedure |
|---|---|---|
| Bottoming out | Vehicle (overloaded) | - |
| Front coil spring (weak) | FRONT SHOCK ABSORBER | |
| Rear coil spring (weak) | REAR SHOCK ABSORBER | |
| Front shock absorber (worn) | FRONT SHOCK ABSORBER | |
| Rear shock absorber (worn) | REAR SHOCK ABSORBER | |
| Pneumatic cylinder with front shock absorber (worn) | FRONT SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Pneumatic cylinder with rear shock absorber (worn) | REAR SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Vehicle tilts | Tire (worn or improperly inflated) | INSPECTION |
| Front stabilizer bar (bent or broken) | FRONT STABILIZER BAR | |
| Rear stabilizer bar (bent or broken) | REAR STABILIZER BAR | |
| Front shock absorber (worn) | FRONT SHOCK ABSORBER | |
| Rear shock absorber (worn) | REAR SHOCK ABSORBER | |
| Pneumatic cylinder with front shock absorber (worn) | FRONT SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Pneumatic cylinder with rear shock absorber (worn) | REAR SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Wheel shimmy | Tire (worn or improperly inflated) | INSPECTION |
| Wheel (out of balance) | INSPECTION | |
| Front shock absorber (worn) | FRONT SHOCK ABSORBER | |
| Rear shock absorber (worn) | REAR SHOCK ABSORBER | |
| Pneumatic cylinder with front shock absorber (worn) | FRONT SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Pneumatic cylinder with rear shock absorber (worn) | REAR SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| Rear wheel alignment (incorrect) | REAR WHEEL ALIGNMENT | |
| Front upper ball joint (worn) | FRONT UPPER SUSPENSION ARM | |
| Front lower ball joint (worn) | FRONT LOWER SUSPENSION ARM | |
| Rear upper No. 1 control arm (worn) | REAR UPPER ARM | |
| Rear upper No. 2 control arm (worn) | REAR UPPER ARM | |
| Rear No. 1 suspension arm (worn) | REAR LOWER ARM | |
| Front hub bearing (worn) | ON-VEHICLE INSPECTION | |
| Rear hub bearing (worn) | ON-VEHICLE INSPECTION | |
| Steering link assembly (out of adjustment) | - | |
| Abnormal tire wear | Tire (worn or improperly inflated) | INSPECTION |
| Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| Rear wheel alignment (incorrect) | REAR WHEEL ALIGNMENT | |
| Front shock absorber (worn) | FRONT SHOCK ABSORBER | |
| Rear shock absorber (worn) | REAR SHOCK ABSORBER | |
| Pneumatic cylinder with front shock absorber (worn) | FRONT SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Pneumatic cylinder with rear shock absorber (worn) | REAR SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Suspension parts (worn) | - | |
| Vehicle sways | Tire (worn or improperly inflated) | INSPECTION |
| Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| Rear wheel alignment (incorrect) | REAR WHEEL ALIGNMENT | |
| Front hub bearing (worn) | ON-VEHICLE INSPECTION | |
| Rear hub bearing (worn) | ON-VEHICLE INSPECTION | |
| Front shock absorber (worn) | FRONT SHOCK ABSORBER | |
| Rear shock absorber (worn) | REAR SHOCK ABSORBER | |
| Pneumatic cylinder with front shock absorber (worn) | FRONT SHOCK ABSORBER (W/ AIR SUSPENSION) | |
| Pneumatic cylinder with rear shock absorber (wor | REAR SHOCK ABSORBER (W/ AIR SUSPENSION) |