Perform a road test before diagnosis. Consider the following systems during the diagnosis:
| • | The suspension system | 
| • | The tires and wheels | 
| • | Inspect the tires for incorrect air pressure and uneven wear. | 
| • | Inspect the joints, from the steering column to the steering gear, for loose connectors or wear. | 
| • | Inspect the following components for any loose or damaged components: | 
| - | The front suspension | 
| - | The rear suspension | 
| - | The steering gear | 
| - | The linkage | 
| • | Inspect the tires for the following conditions: | 
| - | Out-of-round tires | 
| - | Out-of-balance tires | 
| - | Bent wheels | 
| - | Loose or rough wheel bearings | 
| • | Inspect the power steering system for leaks. Refer to Power Steering Gear and Pump Leaks . | 
| • | Inspect the power steering fluid level. Refer to Checking and Adding Power Steering Fluid . |