Lexus IS250 IS220d GSE20 ALE20 - BRAKE
BRAKE SYSTEM - PROBLEM SYMPTOMS TABLE
Use the table below to help determine the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.
| Symptom | Suspected area | See page |
| Low pedal or spongy pedal | 1. Fluid leaks in brake system | |
| 2. Air in brake system | ||
| 3. Piston seals are worn or damaged (FRONT) | ||
| 4. Piston seals are worn or damaged (REAR) | ||
| 5. Master cylinder is faulty | ||
| 6. Booster push rod clearance is out of adjustment | ||
| Brake drag | 1. Brake pedal free play is insufficient | |
| 2. Parking brake pedal travel clearance is out of adjustment | ||
| 3. Parking brake cable is stuck | ||
| 4. Parking brake shoe clearance is out of adjustment | ||
| 5. Pad is cracked or distorted (FRONT) | ||
| 6. Pad is cracked or distorted (REAR) | ||
| 7. Piston is stuck (FRONT) | ||
| 8. Piston is stuck (REAR) | ||
| 9. Piston is seized (FRONT) | ||
| 10. Piston is seized (REAR) | ||
| 11. Booster push rod clearance is out of adjustment | ||
| 12. Vacuum leaks in booster systems | ||
| 13. Master cylinder is faulty | ||
| Brake pull | 1. Piston is stuck (FRONT) | |
| 2. Piston is stuck (REAR) | ||
| 3. Pad is oily (FRONT) | ||
| 4. Pad is oily (REAR) | ||
| 5. Piston is seized (FRONT) | ||
| 6. Piston is seized (REAR) | ||
| 7. Disc is scored (FRONT) | ||
| 8. Disc is scored (REAR) | ||
| 9. Pad is cracked or distorted (FRONT) | ||
| 10. Pad is cracked or distorted (REAR) | ||
| Hard pedal but brake inefficient | 1. Fluid leaks in brake system | |
| 2. Air in brake system | ||
| 3. Pad is worn (FRONT) | ||
| 4. Pad is worn (REAR) | ||
| 5. Pad is cracked or distorted (FRONT) | ||
| 6. Pad is cracked or distorted (REAR) | ||
| 7. Pad is oily (FRONT) | ||
| 8. Pad is oily (REAR) | ||
| 9. Pad is glazed (FRONT) | ||
| 10. Pad is glazed (REAR) | ||
| 11. Disc is scored (FRONT) | ||
| 12. Disc is scored (REAR) | ||
| 13. Booster push rod clearance is out of adjustment | ||
| 14. Vacuum leaks in booster system | ||
| Noise from brakes | 1. Pad is cracked or distorted (FRONT) | |
| 2. Pad is cracked or distorted (REAR) | ||
| 3. Installed bolt is loose (FRONT) | ||
| 4. Installed bolt is loose (REAR) | ||
| 5. Disc is scored (FRONT) | ||
| 6. Disc is scored (REAR) | ||
| 7. Pad support plate is loose (FRONT) | ||
| 8. Pad support plate is loose (REAR) | ||
| 9. Sliding pin is worn (FRONT) | ||
| 10. Sliding pin is worn (REAR) | ||
| 11. Pad is dirty (FRONT) | ||
| 12. Pad is dirty (REAR) | ||
| 13. Pad is glazed (FRONT) | ||
| 14. Pad is glazed (REAR) | ||
| 15. Anti-squeal shim is damaged (FRONT) | ||
| 16. Anti-squeal shim is damaged (REAR) |
LEXUS IS250, IS220d / GSE20 ALE20