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 |
|---|---|---|
| Steering is heavy | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Electric power steering column sub-assembly | ||
| Power steering motor assembly | ||
| Speed sensor | ||
| Battery and power source circuit | - | |
| Power source voltage of power steering ECU assembly | ||
| CAN communication system | ||
| Power steering ECU assembly | ||
| Steering effort differs between right and left or is uneven | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Steering gear assembly (for 2WD) | ||
| Steering gear assembly (for AWD) | ||
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Electric power steering column sub-assembly | ||
| Power steering motor assembly | ||
| Power steering ECU assembly | ||
| While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily | Front suspension (Lower ball joint) | |
| Speed sensor | ||
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Power steering motor assembly | ||
| CAN communication system | ||
| Power steering ECU assembly | ||
| Knocking (or cranking) sound occurs when turning steering wheel back and forth while power steering is in operation | Intermediate shaft assembly | |
| Front suspension (lower ball joint) | ||
| Power steering ECU assembly | ||
| Noise occurs when turning the steering wheel during low-speed driving | Steering gear assembly (for 2WD) | |
| Steering gear assembly (for AWD) | ||
| Electric power steering column sub-assembly | ||
| Friction sounds occur when turning steering wheel during low speed driving | Power steering motor assembly | |
| Electric power steering column sub-assembly | ||
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped | Power steering motor assembly | |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock | Steering gear assembly (for 2WD) | |
| Steering gear assembly (for AWD) | ||
| Electric power steering column sub-assembly |