PROBLEM SYMPTOMS TABLE
HINT:
Symptom | Suspected Area | Link |
---|---|---|
Heavy steering | Front tires (improperly inflated, unevenly worn) |
|
Front wheel alignment (incorrect) |
| |
Front suspension (Lower ball joint) |
| |
Electric power steering column sub-assembly |
| |
Steering gear assembly |
| |
Torque sensor (built into electric power steering column sub-assembly) | - | |
Power steering motor assembly | - | |
Speed sensor circuit |
| |
Auxiliary battery and power source system | - | |
Power steering ECU assembly power source voltage |
| |
Power steering ECU assembly |
| |
Steering effort differs between turning right and left, or steering effort is uneven | Front tires (improperly inflated, unevenly worn) |
|
Front wheel alignment (incorrect) |
| |
Front suspension (Lower ball joint) |
| |
Steering gear assembly |
| |
Torque sensor (built into 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 the steering wheel does not return properly | Front suspension (Lower ball joint) |
|
Speed sensor circuit |
| |
Torque sensor (built into electric power steering column sub-assembly) | - | |
Power steering motor assembly | - | |
Power steering ECU assembly |
| |
CAN communication system |
| |
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 ECU assembly |
| |
Noise occurs when turning the steering wheel during low-speed driving | Steering gear assembly |
|
Electric power steering column sub-assembly |
| |
Friction occurs when turning the steering wheel during low-speed driving | Power steering motor assembly | - |
Electric power steering column sub-assembly |
| |
A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped | Power steering motor assembly | - |
The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped | Power steering motor assembly | - |
Steering gear assembly |
| |
Electric power steering column sub-assembly |
| |
Power steering warning light remains on | Power steering warning light circuit |
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