Problem Symptoms Table
POWER STEERING SYSTEM
| Symptom | Suspected Area | Refer to |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (lower ball joint) | Refer to REMOVAL | |
| Steering gear assembly | Refer to INSPECTION | |
| Power steering motor | Refer to REMOVAL | |
| Battery and power source system | - | |
| Power source voltage of power steering ECU | Refer to TERMINALS OF ECU | |
| Power steering ECU | Refer to REMOVAL | |
| Steering effort differs between turning right and left or uneven | Steering center point (zero point) recorded incorrectly | Refer to CALIBRATION |
| Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION | |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT | |
| Front suspension (lower ball joint) | Refer to REMOVAL | |
| Steering gear assembly | Refer to INSPECTION | |
| Torque sensor (built into steering column) | Refer to REMOVAL | |
| Steering column assembly | Refer to REMOVAL | |
| Power steering motor | Refer to REMOVAL | |
| Power steering ECU | Refer to REMOVAL | |
| While driving, steering effort does not change in accordance with vehicle speed or steering wheel does not return properly | Front suspension (lower ball joint) | Refer to REMOVAL |
| Speed sensor | Refer to TEST MODE PROCEDURE | |
| Skid control ECU | Refer to TERMINALS OF ECU | |
| Torque sensor (built into steering column) | Refer to REMOVAL | |
| Power steering motor | Refer to REMOVAL | |
| Power steering ECU | Refer to REMOVAL | |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Friction occurs when turning steering wheel during low speed driving | Power steering motor | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped | Power steering motor | Refer to REMOVAL |
| Steering wheel vibrates and noise occurs when turning steering wheel with vehicle stopped | Power steering motor | Refer to REMOVAL |
| Steering column assembly | Refer to REMOVAL | |
| PS warning always indicated on combination meter | Power source voltage of power steering ECU | Refer to TERMINALS OF ECU |
| Combination meter | Refer to REMOVAL | |
| Power steering ECU | Refer to REMOVAL | |
| Calibration cannot be performed | TS and CG terminal circuit | Refer to TS and CG Terminal Circuit |
| Power steering ECU | Refer to REMOVAL |