P/S System Symptom Diagnosis
P/S SYSTEM SYMPTOM DIAGNOSIS (1 OF 2)
| Condition | Possible Cause | Action |
|---|---|---|
| Steering wheel feels heavy (at low speed) | Fluid deteriorated, low viscosity, different type of fluid mixed | Replace fluid . |
| Pipes or hoses deformed, air entering through joint | Replace defective part . | |
| Insufficient air purging from P/S circuit | Purge air . | |
| P/S belt worn, lacking in tension | Check belt tension or replace belt as necessary . | |
| Tire inflation pressure excessively low | Inflate tire . | |
| Front wheel alignment out of order | Check and adjust front wheel alignment . | |
| Steering wheel installed improperly (twisted) | Install steering wheel correctly . | |
| Bind tie-rod end ball joint or lower ball joint | Replace defective part . | |
| P/S pump hydraulic pressure fails to increase | Check pressure and repair or replace defective part . | |
| P/S pump hydraulic pressure increases but slowly | Check pressure and repair or replace defective part . | |
| Steering gear case malfunction | Replace gear case . | |
| Steering wheel feels heavy momentarily when turning it to the left or right | Air drawn in due to insufficient amount of fluid | Add fluid and purge air . |
| Slipping accessory drive belt | Check belt tension or replace belt as necessary . | |
| P/S pump hydraulic pressure fails to increase | Check pressure and repair or replace defective part . | |
| P/S pump hydraulic pressure increases but slowly | Check pressure and repair or replace defective part . | |
| Steering gear case malfunction | Replace gear case . | |
| Poor recovery from turns | Deformed pipes or hoses | Replace defective part . |
| Steering column installed improperly | Install steering column correctly . | |
| Front wheel alignment out of order | Check and adjust front wheel alignment . | |
| Ball joints binding | Replace defective part . | |
| P/S pump hydraulic pressure fails to increase | Check pressure and repair or replace defective part . | |
| P/S pump hydraulic pressure increases but slowly | Check pressure and repair or replace defective part . | |
| Steering gear case malfunction | Replace gear case . |
P/S SYSTEM SYMPTOM DIAGNOSIS (2 OF 2)
| Condition | Possible Cause | Action |
|---|---|---|
| Mismatched or uneven tire | Replace tire . | |
| Vehicle pulls to one side during straight driving | Low or uneven tire inflation pressure | Inflate tires to proper pressure or adjust right and left tires inflation pressure . |
| Brake dragging in one wheel | Repair . | |
| Front wheel alignment out of order | Check and adjust front wheel alignment . | |
| Rear wheel alignment out of order | Check and adjust rear wheel alignment . | |
| Malfunction of control valve in gear case | Replace gear case . | |
| Steering wheel play is large and vehicle wanders | Steering wheel play is large and vehicle wanders | Refer to STEERING SYMPTOM DIAGNOSIS . |
| Fluid leakage | Loose joints of (hydraulic pressure) pipes and hoses | Retighten . |
| Deformed or damaged pipes or hoses | Replace defective part . | |
| Abnormal noise | Air drawn in due to insufficient amount of fluid | Add fluid and purge air . |
| Air mixed into fluid from pipes or hoses | Replace pipes or hoses . | |
| Slipping (loose) accessory drive belt | Check belt tension . | |
| Worn accessory drive belt | Replace belt . | |
| Loose gear case fastening bolt | Retighten bolts . | |
| Loose linkage or joints | Retighten . | |
| Pipes or hoses in contact with part of vehicle body | Install pipes and hoses correctly . | |
| Malfunction of control valve in gear case | Replace gear case . | |
| No idle up | Power steering pressure switch defective | Replace power steering pressure switch . |