Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the 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
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See page |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | INSPECTION |
| Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (lower ball joint) | REMOVAL | |
| Steering column | REMOVAL | |
| Torque sensor (built into steering column) | 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 | REMOVAL | |
| Speed sensor | REMOVAL | |
| Skid control ECU (w/ VSC) | REMOVAL | |
| Skid control ECU (w/o VSC) | REMOVAL | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | TERMINALS OF ECU | |
| Power steering ECU | POWER STEERING ECU | |
| 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. | DTC C1515 TORQUE SENSOR ZERO POINT ADJUSTMENT UNDONE; DTC C1525 ROTATION ANGLE SENSOR INITIALIZATION UNDONE |
| Front tires (improperly inflated, unevenly worn) | INSPECTION | |
| Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (lower ball joint) | REMOVAL | |
| Power steering gear (for 2WD) | REMOVAL | |
| Power steering gear (for 4WD) | REMOVAL | |
| Torque sensor (built into steering column) | 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 | REMOVAL | |
| Power steering motor | REMOVAL | |
| Power steering ECU | 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) | REMOVAL |
| Speed sensor | REMOVAL | |
| Skid control ECU (w/ VSC) | REMOVAL | |
| Skid control ECU (w/o VSC) | REMOVAL | |
| Combination meter | COMBINATION METER | |
| Torque sensor (built into steering column) | 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 | REMOVAL | |
| Power steering ECU | POWER STEERING ECU | |
| CAN communication system | 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) | REMOVAL |
| Steering intermediate shaft | REMOVAL | |
| Power steering ECU | POWER STEERING ECU | |
| Noise occurs when turning the steering wheel during low-speed driving. | Power steering gear (for 2WD) | REMOVAL |
| Power steering gear (for 4WD) | REMOVAL | |
| Steering column | REMOVAL | |
| Friction occurs when turning the steering wheel during low-speed driving. | Power steering motor | REMOVAL |
| Steering column | REMOVAL | |
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering motor | REMOVAL |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped. | Power steering gear (for 2WD) | REMOVAL |
| Power steering gear (for 4WD) | REMOVAL | |
| Steering column | REMOVAL | |
| P/S warning is always indicated on the combination meter. | Power source voltage of power steering ECU | TERMINALS OF ECU |
| Combination meter | COMBINATION METER | |
| Power steering ECU | POWER STEERING ECU |