Problem Symptoms Table
If the problem still occurs after the normal system code was displayed during the DTC check, check the components for each problem symptom in the order given in the following table and proceed to the relevant troubleshooting page.
ELECTRONIC POWER STEERING SYSTEM
PROBLEM SYMPTOMS CHART (ELECTRONIC POWER STEERING SYSTEM)
| Symptom | Suspected area | See |
|---|---|---|
| Steering is heavy | 1. Front tires (Improperly inflated, unevenly worn) | ADJUSTMENT |
| 2. Front wheel alignment (Incorrect) | ADJUSTMENT | |
| 3. Front suspension (Lower ball joint) | REMOVAL | |
| 4. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) | |
| 5. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| 6. Steering column assembly (for 3GR-FSE) | REMOVAL | |
| 7. Steering column assembly (for 3UZ-FE) | REMOVAL | |
| 8. Battery and power source system | - | |
| 9. Power source voltage of power steering ECU assembly | IG POWER SOURCE CIRCUIT | |
| 10. Power steering ECU assembly | REMOVAL | |
| 11. Vehicle condition (The steering wheel is turned from left to right repeatedly with the vehicle stopped or a heavy load is continuously applied to the vehicle) | - | |
| Steering effort differs between right and left, or is uneven | 1. Power steering ECU assembly (Steering center point (zero point) is not recorded correctly) | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Front tires (Improperly inflated, unevenly worn) | ADJUSTMENT | |
| 3. Front wheel alignment (Incorrect) | ADJUSTMENT | |
| 4. Front suspension (Lower ball joint) | REMOVAL | |
| 5. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) | |
| 6. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| 7. Steering column assembly (for 3GR-FSE) | REMOVAL | |
| 8. Steering column assembly (for 3UZ-FE) | REMOVAL | |
| 9. Power steering ECU assembly | REMOVAL | |
| While driving, steering effort does not change in accordance with vehicle speed, or the steering wheel does not return to its centered position easily | 1. Front suspension (Lower ball joint) | REMOVAL |
| 2. Speed sensor (for 2WD) | REMOVAL | |
| 3. Speed sensor (for 4WD) | REMOVAL | |
| 4. Brake actuator (w/ VSC) | REMOVAL | |
| 5. Skid control ECU (w/ ECB) | REMOVAL | |
| 6. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) | |
| 7. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| 8. Power steering ECU assembly | REMOVAL | |
| 9. CAN communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Friction sounds occur when turning the steering wheel during low speed driving | 1. Power steering link assembly (Power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) |
| 2. Power steering link assembly (Power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| 3. Steering column assembly (for 3GR-FSE) | REMOVAL | |
| 4. Steering column assembly (for 3UZ-FE) | REMOVAL | |
| High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stopped | 1. Power steering link assembly (Power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) |
| 2. Power steering link assembly (Power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| The steering wheel vibrates and noise occurs when turning the steering wheel with the vehicle stopped | 1. Power steering link assembly (Power steering motor)(for 2WD) | STEERING GEAR (FOR 2WD) |
| 2. Power steering link assembly (Power steering motor)(for 4WD) | STEERING GEAR (FOR 4WD) | |
| 3. Steering column assembly (for 3GR-FSE) | REMOVAL | |
| 4. Steering column assembly (for 3UZ-FE) | REMOVAL | |
| P/S warning light in the combination meter is always on | 1. IG power source circuit | IG POWER SOURCE CIRCUIT |
| 2. Combination meter | REMOVAL | |
| 3. Power steering ECU assembly | REMOVAL |