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 assembly | Refer to INSPECTION | |
| Steering column assembly | Refer to INSPECTION | |
| Torque sensor (Built into steering column assembly) | 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 DTC C1522: Motor Circuit Malfunction; DTC C1523: Motor Circuit Malfunction; DTC C1524: Motor Circuit Malfunction; DTC C1555: Motor Relay Welding Failure | |
| Speed sensor | Refer to REMOVAL | |
| Skid control ECU (Built into brake actuator) | Refer to REMOVAL | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | Refer to TERMINALS OF ECU | |
| Power steering ECU assembly | Refer to REMOVAL | |
| Steering effort differs between right and left or is uneven | Rotation angle sensor initialization and torque sensor zero point calibration | 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 INSPECTION | |
| Power steering gear assembly | Refer to INSPECTION | |
| Torque sensor (Built into steering column assembly) | 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 DTC C1522: Motor Circuit Malfunction; DTC C1523: Motor Circuit Malfunction; DTC C1524: Motor Circuit Malfunction; DTC C1555: Motor Relay Welding Failure | |
| Power steering ECU assembly | Refer to REMOVAL | |
| While driving, steering effort does not change in accordance with vehicle speed or steering wheel does not return properly | Front suspension (Lower ball joint) | Refer to INSPECTION |
| Speed sensor | Refer to REMOVAL | |
| Skid control ECU (Built into brake actuator) | Refer to REMOVAL | |
| Combination meter assembly | Refer to REMOVAL | |
| Torque sensor (Built into steering column assembly) | 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 DTC C1522: Motor Circuit Malfunction; DTC C1523: Motor Circuit Malfunction; DTC C1524: Motor Circuit Malfunction; DTC C1555: Motor Relay Welding Failure | |
| Power steering gear assembly | Refer to INSPECTION | |
| Power steering ECU assembly | Refer to REMOVAL | |
| Knocking (or cranking) sound occurs when turning steering wheel while power steering is operating | Front suspension (Lower ball joint) | Refer to INSPECTION |
| Steering intermediate shaft | Refer to REMOVAL | |
| Power steering gear assembly | Refer to REMOVAL | |
| Noise occurs when turning steering wheel during low speed driving | Power steering gear assembly | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| Power steering ECU assembly | Refer to REMOVAL | |
| High-pitched sounds (squeaking) occur when turning steering wheel slowly with vehicle stopped | Power steering gear assembly | Refer to REMOVAL |
| Power steering motor | Refer to DTC C1522: Motor Circuit Malfunction; DTC C1523: Motor Circuit Malfunction; DTC C1524: Motor Circuit Malfunction; DTC C1555: Motor Relay Welding Failure | |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock | Power steering gear assembly | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| Power steering warning light remains on | Proceed to Power Steering Warning Light Circuit | Refer to Power Steering Warning Light Circuit |