ELECTRONIC POWER STEERING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
If the problem still occurs even after the normal system code was displayed during the DTC check, check the components for each problem symptom in the order given in the following table and proceed to the relevant troubleshooting page.
| Symptom | Suspected Area | See Page |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | |
| Front wheel alignment (incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Steering gear assembly | ||
| Torque sensor (built into steering column) | ||
| Steering column assembly | ||
| Power steering motor | ||
| Battery and power source system | - | |
| Power source voltage of power steering ECU assembly | ||
| Power steering ECU assembly | ||
| Steering effort differs between turning right and left, or uneven | Steering center point (zero point) not recorded completely | |
| Front tires (improperly inflated, unevenly worn) | ||
| Front wheel alignment (incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Steering gear assembly | ||
| Torque sensor (built into steering column) | ||
| Steering column assembly | ||
| Power steering motor | ||
| Power steering ECU assembly | ||
| While driving, steering effort does not change in accordance with vehicle speed or steering wheel does not return properly | Front suspension (Lower ball joint) | |
| Speed sensor | ||
| Skid control ECU | ||
| Engine speed detection circuit | ||
| ECM | ||
| Torque sensor (built into steering column) | ||
| Power steering motor | ||
| Power steering ECU assembly | ||
| Clunking sound occurs when turning steering wheel right and left while power steering in operation | Front suspension (Lower ball joint) | |
| Steering intermediate shaft | - | |
| Steering gear assembly | ||
| Friction sound occurs when turning steering wheel during low speed driving | Power steering motor | |
| Steering column assembly | ||
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stationary | Power steering motor | |
| Steering wheel vibrates and noise occurs when turning steering wheel with vehicle stationary | Power steering motor | |
| Steering column assembly | ||
| P/S warning always indicated on multi-display | Refer to flowchart |