Problem Symptoms Table
HINT:
- 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.
Steering System
PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspected Area | See |
|---|---|---|
| Steering is heavy. | Front tires (Improperly inflated, unevenly worn) | INSPECTION |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Power steering gear (for 2GR-FE) | REMOVAL | |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Steering column assembly | REMOVAL | |
| Torque sensor (Built into steering column assembly) | - | |
| Power steering motor | - | |
| Speed sensor | TEST MODE PROCEDURE | |
| Skid control ECU (Built into brake actuator) | - | |
| Battery and power source system | - | |
| Power steering ECU power source voltage and relay | - | |
| Power steering ECU assembly | REMOVAL | |
| Poor return | Front tires (Improperly inflated, unevenly worn) | INSPECTION |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Steering column assembly | REMOVAL | |
| Power steering ECU assembly | REMOVAL | |
| Excessive free play | Front tires (Improperly inflated, unevenly worn) | INSPECTION |
| Front suspension (Lower ball joint) | INSPECTION | |
| Intermediate shaft, universal joint, sliding yoke (Worn) | - | |
| Front wheel bearing (Worn) | REMOVAL | |
| Steering effort differs between right and left or is uneven. | Rotation angle sensor initialization and torque sensor zero point calibration | CALIBRATION |
| Front tires (Improperly inflated, unevenly worn) | INSPECTION | |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Power steering gear (for 2GR-FE) | REMOVAL | |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Torque sensor (Built into steering column assembly) | - | |
| Steering column assembly | REMOVAL | |
| Power steering motor | - | |
| Power steering ECU assembly | REMOVAL | |
| 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) | INSPECTION |
| Speed sensor | TEST MODE PROCEDURE | |
| Skid control ECU (Built into brake actuator) | - | |
| Combination meter | REMOVAL | |
| Torque sensor (Built into steering column assembly) | - | |
| Power steering motor | - | |
| Power steering gear (for 2GR-FE) | REMOVAL | |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Power steering ECU assembly | REMOVAL | |
| A knocking (or cranking) sound occurs when turning the steering wheel while power steering is operating. | Front suspension (Lower ball joint) | INSPECTION |
| Steering intermediate shaft | - | |
| Power steering gear (for 2GR-FE) | REMOVAL | |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Noise occurs when turning the steering wheel during low speed driving. | Power steering gear (for 2GR-FE) | REMOVAL |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Steering column assembly | REMOVAL | |
| Power steering ECU assembly | REMOVAL | |
| High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stopped. | Power steering gear (for 2GR-FE) | REMOVAL |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Power steering motor | - | |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. | Power steering gear (for 2GR-FE) | REMOVAL |
| Power steering gear (for 1AR-FE) | REMOVAL | |
| Steering column assembly | REMOVAL | |
| PS warning light remains on. | Proceed to PS warning light remains on | PS WARNING LIGHT REMAINS ON |