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 | See page |
|---|---|---|
| Steering is heavy | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Power steering link assembly (Torque sensor, power steering motor) | ||
| Steering column assembly | - | |
| Auxiliary battery and power source circuit | ||
| Power source voltage of power steering ECU assembly | ||
| Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle) | ||
| Power steering ECU assembly | ||
| Steering effort differs between right and left or is uneven | Motor rotation angle sensor value initialization and torque sensor zero point calibration incomplete | |
| Front tires (Improperly inflated, unevenly worn) | ||
| Front wheel alignment (Incorrect) | ||
| Front suspension (Lower ball joint) | ||
| Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor) | ||
| Steering column 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 | ||
| Skid control ECU | ||
| Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor) | ||
| CAN communication system (Vehicle speed) (for LHD) | ||
| CAN communication system (Vehicle speed) (for RHD) | ||
| Power steering ECU assembly | ||
| Knocking (or cranking) sound occurs when turning steering wheel back and forth while power steering is in operation | No. 2 steering intermediate shaft assembly | - |
| Steering sliding with shaft yoke sub-assembly | - | |
| Power steering link assembly | - | |
| Friction sounds occur when turning steering wheel during low speed driving | Power steering link assembly (Power steering motor) | - |
| Steering column assembly | - | |
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped | Power steering link assembly (Power steering motor) | - |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock | Power steering link assembly (Power steering motor) | - |
| Steering column assembly | - | |
| Power steering warning light abnormal | Auxiliary battery and power source circuit | |
| Power steering warning light circuit |