POWER STEERING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | |
| Front wheel alignment (incorrect) | ||
| Front suspension (lower ball joint) | ||
| Steering column | ||
| Torque sensor (built into steering column) | - | |
| Power steering motor | - | |
| Speed sensor | ||
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | ||
| Power steering ECU | ||
| Skid control ECU | - | |
| Steering effort differs between turning right and left, or steering effort is uneven. | Initialization of rotation angle sensor and calibration of torque sensor zero point are not completed | |
| Front tires (improperly inflated, unevenly worn) | ||
| Front wheel alignment (incorrect) | ||
| Front suspension (lower ball joint) | ||
| Power steering gear | ||
| Torque sensor (built into steering column) | - | |
| Steering column | ||
| Power steering motor | - | |
| Power steering ECU | ||
| 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 | - | |
| Combination meter | - | |
| Torque sensor (built into steering column) | - | |
| Power steering motor | - | |
| Power steering ECU | ||
| CAN communication system | - | |
| A knocking (or clunking) sound occurs when turning the steering wheel back and forth while power steering is operating. | Front suspension (lower ball joint) | |
| Steering intermediate shaft | - | |
| Power steering ECU | ||
| Noise occurs when turning the steering wheel during low-speed driving. | Power steering gear | |
| Steering column | ||
| Friction occurs when turning the steering wheel during low-speed driving. | Power steering motor | - |
| Steering column | ||
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering motor | - |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped. | Power steering gear | |
| Steering column | ||
| P/S warning light remains on. | P/S warning light |