Lexus IS250 IS220d GSE20 ALE20 - POWER STEERING
ELECTRONIC POWER STEERING SYSTEM - PROBLEM SYMPTOMS TABLE
| Symptom | Suspected area | See page |
| Steering is heavy. | 1. Front tires (improperly inflated, unevenly worn) | |
| 2. Front wheel alignment (Incorrect) | ||
| 3. Front suspension | ||
| 4. Power steering gear assembly | ||
| 5. Steering column assembly (Manual tilt) | ||
| 6. Steering column assembly (Power tilt and Power telescopic) | ||
| 7. Battery and power source system | - | |
| 8. Power source voltage of power steering ECU assembly | ||
| 9. Power steering ECU assembly | ||
| 10. 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 is not recorded correctly) | |
| 2. Front tires (improperly inflated, unevenly worn) | ||
| 3. Front wheel alignment (Incorrect) | ||
| 4. Front suspension | ||
| 5. Power steering gear assembly | ||
| 6. Steering column assembly (Manual tilt) | ||
| 7 Steering column assembly (Power tilt and Power telescopic) | ||
| 8. Power steering ECU assembly | ||
| 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. Speed sensor (Front) | |
| 2. Speed sensor (Rear) | ||
| 3. Skid control ECU (without VDIM) | ||
| 4. Skid control ECU (with VDIM) | ||
| 5. Power steering gear assembly | ||
| 6. Power steering ECU assembly | ||
| Friction sounds occur when turning the steering wheel during low speed driving. | 1. Power steering gear assembly | |
| 2. Power steering ECU assembly | ||
| High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stepped. | 1. Power steering gear assembly | |
| The steering wheel vibrates and noise occurs when turning the steering wheel with the vehicle stopped. | 1. Power steering gear assembly | |
| 2. Steering column assembly (Manual tilt) | ||
| 3 Steering column assembly (Power tilt and Power telescopic) | ||
| PS warning light remains on. | PS warning light remains on | |
| PS warning light does not come on. | PS warning light does not come on |
LEXUS IS250, IS220d / GSE20 ALE20