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 | See |
|---|---|---|
| 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 | |
| Torque sensor (built into steering column assembly) | Refer to REMOVAL | |
| Power steering motor | Refer to REMOVAL | |
| Speed sensor | Refer to REMOVAL | |
| Skid control ECU | Refer to REMOVAL | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | Refer to DTC C1551: IG Power Supply Voltage Malfunction | |
| Power steering ECU | Refer to REMOVAL | |
| Steering effort differs between right and left, or steering effort 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 | |
| Steering gear (1AR-FE) | Refer to REMOVAL | |
| Steering gear (2GR-FE) | Refer to REMOVAL | |
| Torque sensor (built into steering column assembly) | Refer to REMOVAL | |
| 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 INSPECTION |
| Speed sensor | Refer to REMOVAL | |
| Skid control ECU | Refer to REMOVAL | |
| Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Engine speed detection circuit | - | |
| Torque sensor (built into steering column assembly) | Refer to REMOVAL | |
| 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 | Steering gear (1AR-FE) | Refer to REMOVAL |
| steering gear (2GR-FE) | 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 | Steering gear (1AR-FE) | Refer to REMOVAL |
| steering gear (2GR-FE) | Refer to REMOVAL | |
| Steering column assembly | Refer to REMOVAL | |
| P/S warning light does not come on or always illuminated on the combination meter | Power source voltage of power steering ECU | Refer to DTC C1551: IG Power Supply Voltage Malfunction |
| EPS warning light circuit | Refer to EPS Warning Light Circuit | |
| Power steering ECU | Refer to REMOVAL |