Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of a problem. The likely causes of the problem are indicated in descending order. Check each suspected area in order. Repair or replace faulty parts or perform adjustments 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 INSPECTION | |
| Steering column assembly | Refer to REMOVAL | |
| Steering column assembly (Torque sensor) | 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 (Power steering motor) | Refer to REMOVAL | |
| Speed sensor | Refer to REMOVAL | |
| Brake actuator assembly (Skid control ECU) | 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 right and left, or steering effort is uneven. | Initialization of rotation angle sensor and calibration of torque sensor zero point are not completed | Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1525: Rotation Angle Sensor Initialization Undone |
| 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 | Refer to INSPECTION | |
| Steering column assembly (Torque sensor) | 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 | |
| Steering column assembly (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 INSPECTION |
| Speed sensor | Refer to REMOVAL | |
| Brake actuator assembly (Skid control ECU) | Refer to REMOVAL | |
| Combination meter | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Engine speed detection circuit | - | |
| Steering column assembly (Torque sensor) | 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 (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 power steering is in operation. | Front suspension (lower ball joint) | Refer to INSPECTION |
| 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 INSPECTION |
| Steering column assembly | Refer to REMOVAL | |
| Friction occurs when turning the steering wheel during low-speed driving. | Steering column assembly (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. | 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 with the vehicle stopped. | Power steering gear | Refer to INSPECTION |
| Steering column assembly | Refer to REMOVAL | |
| EPS warning is always indicated on the combination meter. | PS (EPS) warning light remains ON | Refer to PS Warning Light Remains ON |