Hyundai Sonata: General Information / Troubleshooting
| Troubleshooting |
| Problem Symptoms Table |
Use the table below to help you find the cause of the
problem. The numbers indicate the priority of the like cause of the
problem. Check each part in order.
If necessary, replace these parts.
| Symptom | Suspect Area | Reference |
| Lower pedal or spongy pedal | 1. Brake system (Fluid leaks) 2. Brake system (Air in) 3. Piston seals (Worn or damaged) 4. Rear brake shoe clearance(Out of adjustment) 5. Master cylinder (Inoperative) | repair air·bleed replace adjust replace |
| Brake drag | 1. Brake pedal free play (Minimum) 2. Parking brake lever travel (Out of adjustment) 3. Parking brake wire (Sticking) 4. Rear brake shoe clearance(Out of adjustment) 5. Pad or lining (Cracked or distorted) 6. Piston (Stuck) 7. Piston (Frozen) 8. Anchor or shoe (Inoperative) 9. Booster system (Vacuum leaks) 10. Master cylinder (Inoperative) | adjust adjust repair adjust replace replace replace replace repair replace |
| Brake pull | 1. Piston (Sticking) 2. Pad or lining (Oily) 3. Piston (Frozen) 4. Disc (Scored) 5. Pad or lining (Cracked or distorted) | replace replace replace replace replace |
| Hard pedal but brake inefficient | 1. Brake system (Fluid leaks) 2. Brake system (Air in) 3. Pad or lining (Worn) 4. Pad or lining (Cracked or distorted) 5. Rear brake shoe clearance(Out of adjustment) 6. Pad or lining (Oily) 7. Pad or lining (Glazed) 8. Disc (Scored) 9. Booster system (Vacuum leaks) | repair air·bleed replace replace adjust adjust replace replace repair |
| Noise from brake | 1. Pad or lining (Cracked or distorted) 2. Installation bolt (Loosen) 3. Disc (Scored) 4. Sliding pin (Worn) 5. Pad or lining (Dirty) 6. Pad or lining (Glazed) 7. Anchor or shoe (Faulty) 8. Brake pad shim (Damage) 9. Shoe hold-down spring (Damage) | replace adjust replace replace clean replace replace replace replace |
| Brake fades | 1. Master cylinder (Inoperative) | replace |
| Brake vibration, pulsation | 1. Brake booster (Vacuum leaks) 2. Pedal free play 3. Master cylinder (Inoperative) 4. Caliper (Damage) 5. Master cylinder cap seal 6. Damaged brake lines | replace adjust replace replace replace replace |
| Brake Chatter | Brake chatter is usually caused by loose or worn components, or
glazed or burnt linings. Rotors with hard spots can also contribute to
brake chatter. Additional causes of chatter are out-of-tolerance rotors,
brake lining not securely attached to the shoes, loose wheel bearings
and contaminated brake lining. |
Special Service Tools
Special Service Tools
Tool(Number and Name)IllustrationUse09581-11000Piston expanderSpreading the rear disc brake piston.09580 - 0U000Brake piston adjusterRemoval and installation of the rear di ...
Brake System
...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Trunk Lid Assembly Components and Components Location
Component Location
1. Trunk lid assembly
...
Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
Description of ESP
Optimum driving safety now has a name : ESP, the Electronic Stability Program.
ESP recognizes critical driving conditions, such as panic
reactions in dangerous situations, and stabilizes the vehicle by
wheel-individual braking and engine control intervention with no need ...
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