ELECTRONIC POWER STEERING SYSTEM:
Symptom
| Suspected area
| See page
|
Steering is heavy
| 1. Front tires (Improperly inflated, unevenly worn)
|
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2. Front wheel alignment (Incorrect)
|
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3. Front suspension (Lower ball joint)
|
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4. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)
|
Click here
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5. Steering column assembly (for 3GR-FE)
|
Click here
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6. Steering column assembly (for 3GR-FSE)
|
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7. Steering column assembly (for 3UZ-FE)
|
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8. Battery and power source system
| -
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9. Power source voltage of power steering ECU assembly
|
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10. Power steering ECU assembly
|
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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)
| -
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Steering effort differs between right and left, or is uneven
| 1. Power steering ECU assembly (Steering center point (zero point) is not recorded correctly)
|
Click here
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2. Front tires (Improperly inflated, unevenly worn)
|
Click here
|
3. Front wheel alignment (Incorrect)
|
Click here
|
4. Front suspension (Lower ball joint)
|
Click here
|
5. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)
|
Click here
|
6. Steering column assembly (for 3GR-FE)
|
Click here
|
7. Steering column assembly (for 3GR-FSE)
|
Click here
|
8. Steering column assembly (for 3UZ-FE)
|
Click here
|
9. Power steering ECU assembly
|
Click here
|
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)
|
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2. Speed sensor
|
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3. Brake actuator (w/ VSC)
|
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4. Skid control ECU (w/ ECB)
|
Click here
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5. Power steering link assembly (Torque sensor, motor rotation angle sensor, power steering motor)
|
Click here
|
6. Power steering ECU assembly
|
Click here
|
7. CAN communication system
|
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Friction sounds occur when turning the steering wheel during low speed driving
| 1. Power steering link assembly (Power steering motor)
|
Click here
|
2. Steering column assembly (for 3GR-FE)
|
Click here
|
3. Steering column assembly (for 3GR-FSE)
|
Click here
|
4. Steering column assembly (for 3UZ-FE)
|
Click here
|
High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stopped
| 1. Power steering link assembly (Power steering motor)
|
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The steering wheel vibrates and noise occurs when turning the steering wheel with the vehicle stopped
| 1. Power steering link assembly (Power steering motor)
|
Click here
|
2. Steering column assembly (for 3GR-FE)
|
Click here
|
3. Steering column assembly (for 3GR-FSE)
|
Click here
|
4. Steering column assembly (for 3UZ-FE)
|
Click here
|
P/S warning light in the combination meter is always on
| 1. IG power source circuit
|
Click here
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2. Combination meter
|
Click here
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3. Power steering ECU assembly
|
Click here
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