Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem. Check each part in order. If necessary, repair or replace the faulty parts.
POWER STEERING SYSTEM
PROBLEM SYMPTOMS CHART (POWER STEERING SYSTEM)
| Symptom | Suspected area | See |
|---|---|---|
| Steering is heavy. | Front tires (Improperly inflated, unevenly worn) | INSPECTION |
| Front wheel alignment (Incorrect) | ADJUSTMENT | |
| Front suspension (Lower ball joint) | REMOVAL | |
| Steering column assembly (for 3GR-FSE) | REMOVAL | |
| Steering column assembly (for 3UZ-FE) | REMOVAL | |
| Torque sensor (Built into steering link assembly) | - | |
| Steering column assembly (for 3GR-FSE) | REMOVAL | |
| Steering column assembly (for 3UZ-FE) | REMOVAL | |
| Power steering motor | - | |
| Speed sensor | - | |
| Skid control ECU | - | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | - | |
| Power steering ECU | - | |
| Steering effort differs between right and left or is uneven. | Calibration of turning angle sensor output and torque sensor zero point is not completed | HOW TO PROCEED WITH TROUBLESHOOTING |
| Front tires (Improperly inflated, unevenly worn) | INSPECTION | |
| Front wheel alignment (Incorrect) | ADJUSTMENT | |
| Front suspension (Lower ball joint) | REMOVAL | |
| Power steering gear (for 2WD) | STEERING GEAR (FOR 2WD) | |
| Power steering gear (for 4WD) | STEERING GEAR (FOR 4WD) | |
| Torque sensor (Built into steering link assembly) | - | |
| Steering column assembly (for 3GR-FSE) | REMOVAL | |
| Steering column assembly (for 3UZ-FE) | REMOVAL | |
| Power steering motor | - | |
| 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 | - | |
| Skid control ECU | - | |
| Combination meter | - | |
| Engine speed detection circuit | - | |
| Torque sensor (Built into steering link assembly) | - | |
| Power steering motor | - | |
| Power steering ECU | - | |
| 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 | - | |
| Power steering gear (for 2WD) | STEERING GEAR (FOR 2WD) | |
| Power steering gear (for 4WD) | STEERING GEAR (FOR 4WD) | |
| Noise occurs when turning the steering wheel during low speed driving. | Power steering gear (for 2WD) | STEERING GEAR (FOR 2WD) |
| Power steering gear (for 4WD) | STEERING GEAR (FOR 4WD) | |
| Steering column assembly (for 3GR-FSE) | REMOVAL | |
| Steering column assembly (for 3UZ-FE) | REMOVAL | |
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering motor | - |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. | Power steering gear (for 2WD) | STEERING GEAR (FOR 2WD) |
| Power steering gear (for 4WD) | STEERING GEAR (FOR 4WD) | |
| Steering column assembly (for 3GR-FSE) | REMOVAL | |
| Steering column assembly (for 3UZ-FE) | REMOVAL |