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 | Refer To |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (lower ball joint) | Refer to REMOVAL | |
| Steering gear assembly | Refer to REMOVAL | |
| Torque sensor (built into steering column) | Refer to DTC C1511: Torque Sensor Circuit Malfunction; DTC C1512: Torque Sensor Circuit Malfunction; DTC C1513: Torque Sensor Circuit Malfunction; DTC C1514: Torque Sensor Power Supply Abnormal; DTC C1517: Torque Hold Abnormal | |
| Power steering motor | Refer to REMOVAL | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | Refer to TERMINALS OF ECU | |
| Power steering ECU | Refer to REMOVAL | |
| Steering effort differs between turning right and left, or steering effort is uneven. | Steering center point (zero point) recorded incorrectly | Refer to CALIBRATION |
| Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION | |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (lower ball joint) | Refer to REMOVAL | |
| Steering gear assembly | Refer to REMOVAL | |
| Torque sensor (built into steering column) | Refer to DTC C1511: Torque Sensor Circuit Malfunction; DTC C1512: Torque Sensor Circuit Malfunction; DTC C1513: Torque Sensor Circuit Malfunction; DTC C1514: Torque Sensor Power Supply Abnormal; DTC C1517: Torque Hold Abnormal | |
| Steering column assembly | Refer to REMOVAL | |
| Power steering motor | Refer to REMOVAL | |
| 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 REMOVAL |
| Torque sensor (built into steering column) | Refer to DTC C1511: Torque Sensor Circuit Malfunction; DTC C1512: Torque Sensor Circuit Malfunction; DTC C1513: Torque Sensor Circuit Malfunction; DTC C1514: Torque Sensor Power Supply Abnormal; DTC C1517: Torque Hold Abnormal | |
| Power steering motor | Refer to REMOVAL | |
| Power steering ECU | Refer to REMOVAL | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| A knocking (or cranking) sound occurs when turning the steering wheel back and forth while operating the power steering. | Front suspension (lower ball joint) | Refer to REMOVAL |
| Steering intermediate shaft | Refer to REMOVAL | |
| Power steering ECU | Refer to REMOVAL | |
| Noise occurs when turning the steering wheel during low-speed driving. | Power steering gear | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| Friction occurs when turning the steering wheel during low-speed driving. | Power steering motor | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering motor | Refer to REMOVAL |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped. | Power steering gear | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| The P/S warning light does not come on, or is always on. | Power source voltage of power steering ECU | Refer to TERMINALS OF ECU |
| EPS warning light circuit | Refer to EPS Warning Light Circuit | |
| Power steering ECU | Refer to REMOVAL |