Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem. 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.
Steering System
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area | Refer To |
|---|---|---|
| Steering is heavy. | 1. Front tires (improperly inflated, unevenly worn) | TIRE AND WHEEL SYSTEM |
| 2. Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| 3. Front suspension (Lower ball joint) | FRONT LOWER BALL JOINT | |
| 4. Steering gear | STEERING GEAR | |
| 5. Torque sensor (built into steering column) | - | |
| 6. Steering column | STEERING COLUMN ASSEMBLY | |
| 7. Power steering motor | STEERING COLUMN ASSEMBLY | |
| 8. Battery and power source system | - | |
| 9. Power Steering ECU | STEERING CONTROL ECU | |
| Steering effort differs between right and left or is uneven. | 1. Steering center point (zero point) (not recorded completely) | STEERING GEAR |
| 2. Front tires (improperly inflated, unevenly worn) | TIRE AND WHEEL SYSTEM | |
| 3. Front wheel alignment (incorrect) | FRONT WHEEL ALIGNMENT | |
| 4. Front suspension (Lower ball joint) | FRONT LOWER BALL JOINT | |
| 5. Steering gear | STEERING GEAR | |
| 6. Torque sensor (built into steering column) | - | |
| 7. Steering column | STEERING COLUMN ASSEMBLY | |
| 8. Power steering motor | STEERING COLUMN ASSEMBLY | |
| 9. Power steering ECU | STEERING CONTROL ECU | |
| While driving, steering effort does not change in accordance with vehicle speed or steering wheel does not return properly. | 1. Front suspension | FRONT WHEEL ALIGNMENT |
| 2. Speed sensor | - | |
| 3. Skid control ECU | SKID CONTROL ECU | |
| 4. Combination meter | - | |
| 5. Engine speed detection circuit | - | |
| 6. Torque sensor (built into steering column) | - | |
| 7. Power steering motor | STEERING COLUMN ASSEMBLY | |
| 8. Power steering ECU | STEERING CONTROL ECU | |
| Knocking (or clunking) sound occurs when turning steering wheel back and forth while power steering is in operation. | 1. Front suspension | FRONT WHEEL ALIGNMENT |
| 2. Steering intermediate shaft | - | |
| 3. Steering gear | STEERING GEAR | |
| Friction sound occurs when turning steering wheel during low speed driving. | 1. Power steering motor | STEERING COLUMN ASSEMBLY |
| 2. Steering column | STEERING COLUMN ASSEMBLY | |
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped. | 1. Power steering motor | STEERING COLUMN ASSEMBLY |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock. | 1. Power steering motor | STEERING COLUMN ASSEMBLY |
| 2. Steering column | STEERING COLUMN ASSEMBLY |