Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Steering is heavy. | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Rack and pinion power steering gear assembly | ||
| Steering column assembly | ||
| Torque sensor (Built into steering column assembly) | - | |
| Power steering motor (Built into steering column assembly) | - | |
| Speed sensor | ||
| Skid control ECU | ||
| Battery and power source system | ||
| Power steering ECU power supply voltage and relay | ||
| Power steering ECU assembly | ||
| Steering effort differs between right and left or is uneven. | Calibration of rotation angle sensor output and torque sensor | |
| Front tires (Improperly inflated, unevenly worn) | ||
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Rack and pinion power steering gear assembly | ||
| Torque sensor (Built into steering column assembly) | - | |
| Steering column assembly | ||
| Power steering motor (Built into steering column assembly) | - | |
| Power steering ECU assembly | ||
| While driving, steering effort does not change in accordance with vehicle speed or the steering wheel does not return properly. | Front suspension (Lower ball joint) | |
| Speed sensor | ||
| Skid control ECU | ||
| Torque sensor (Built into steering column assembly) | - | |
| Power steering motor (Built into steering column assembly) | - | |
| Rack and pinion power steering gear assembly | ||
| Power steering ECU assembly | ||
| A knocking (or cranking) sound occurs when turning the steering wheel while power steering operating. | Front suspension (Lower ball joint) | |
| Steering intermediate shaft | - | |
| Rack and pinion power steering gear assembly | ||
| Noise occurs when turning the steering wheel during low speed driving. | Power steering motor (Built into steering column assembly) | - |
| Rack and pinion power steering gear assembly | ||
| Steering column assembly | ||
| Steering sensor | - | |
| Power steering ECU assembly | ||
| High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stopped. | Rack and pinion power steering gear assembly | |
| Power steering motor (Built into steering column assembly) | - | |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. | Rack and pinion power steering gear assembly | |
| Power steering motor (Built into steering column assembly) | - | |
| Steering column assembly | ||
| EPS warning light remains on. | EPS warning light circuit |