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