Tech Tips
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | |
| Front wheel alignment (incorrect) | ||
| Front suspension (lower ball joint) | ||
| Steering column assembly | ||
| Power steering motor | ||
| Speed sensor*1 | ||
| Speed sensor*2 | ||
| Battery and power source system*3 | ||
| Battery and power source system*4 | ||
| Battery and power source system*5 | ||
| Battery and power source system*6 | ||
| Power steering ECU power source voltage and relay | ||
| Steering gear assembly | ||
| Power steering ECU with motor assembly | ||
| Steering effort differs between turning right and left, or steering effort is uneven. | Calibration of torque sensor zero point are not completed | |
| Front tires (improperly inflated, unevenly worn) | ||
| Front wheel alignment (incorrect) | ||
| Steering column assembly | ||
| Steering gear assembly | ||
| Power steering ECU with motor assembly | ||
| 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) | |
| Speed sensor*1 | ||
| Speed sensor*2 | ||
| Combination meter assembly | ||
| Power steering ECU with motor assembly | ||
| A knocking (or clunking) sound occurs when turning the steering wheel back and forth while power steering is operating. | Front suspension (lower ball joint) | |
| Steering intermediate shaft | ||
| Power steering motor | ||
| Friction occurs when turning the steering wheel during low-speed driving. | Power steering motor | |
| Steering column assembly | ||
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. | Power steering motor | |
| Steering column assembly | ||
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped. | Power steering motor | |
| Steering column assembly |
*1: for ABS
*2: for VSC
*3: for 1AD-FTV
*4: for 1ND-TV
*5: for 1NR-FE
*6: for 1ZR-FAE