Problem Symptoms Table
HINT:
- 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.
POWER STEERING SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Steering is heavy. | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (Lower ball joint) | Refer to INSPECTION | |
| Power steering gear (for 2GR-FE) | Refer to INSPECTION | |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) | Refer to REMOVAL | |
| Speed sensor | Refer to TEST MODE PROCEDURE | |
| Brake actuator (Skid control ECU) | Refer to REMOVAL | |
| Battery and power source system | - | |
| Power source voltage of steering column assembly (Power steering ECU) | Refer to TERMINALS OF ECU | |
| Steering effort differs between right and left or is uneven. | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (Lower ball joint) | Refer to INSPECTION | |
| Power steering gear (for 2GR-FE) | Refer to INSPECTION | |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) | Refer to REMOVAL | |
| 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) | Refer to INSPECTION |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Speed sensor | Refer to TEST MODE PROCEDURE | |
| Brake actuator (Skid control ECU) | Refer to REMOVAL | |
| Combination meter | Refer to REMOVAL | |
| Power steering gear (for 2GR-FE) | Refer to INSPECTION | |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) | Refer to REMOVAL | |
| A knocking (or cranking) sound occurs when turning the steering wheel while power steering is operating. | Front suspension (Lower ball joint) | Refer to INSPECTION |
| Steering intermediate shaft | - | |
| Power steering gear (for 2GR-FE) | Refer to INSPECTION | |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly | Refer to REMOVAL | |
| Noise occurs when turning the steering wheel during low speed driving. | Power steering gear (for 2GR-FE) | Refer to INSPECTION |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly | Refer to REMOVAL | |
| Friction occurs when turning the steering wheel during low speed driving. | Steering column assembly | Refer to REMOVAL |
| High pitched sounds (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering gear (for 2GR-FE) | Refer to INSPECTION |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly (Power steering motor) | Refer to REMOVAL | |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. | Power steering gear (for 2GR-FE) | Refer to INSPECTION |
| Power steering gear (for 1AR-FE) | Refer to INSPECTION | |
| Steering column assembly | Refer to REMOVAL | |
| EPS warning light remains on. | Proceed to PS warning light remains on | Refer to PS Warning Light Remains ON |