Hyundai Kona: Brake System / Troubleshooting

Hyundai Kona (OS) 2018-2020 Service Manual / Brake System / 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 Return spring (Inoperative) 9. Booster system (Vacuum leaks) 10. Master cylinder (Inoperative)	adjust adjust repair adjust replace replace replace replace replace 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 replace replace replace replace
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 Return spring (Faulty) 8. Brake pad shim (Damage) 9. Shoe hold-down spring (Damage)	replace adjust replace replace clean replace replace replace replace
Brake fades	1. Pad or lining (Worn) 2. Master cylinder (Inoperative)	replace 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

Special service tools

Special Service Tools Tool (Number and Name) Illustration Use 09581-2T100 Piston expander Sprea ...

Brake bleeding prcoedures

Brake Bleeding Prcoedures Brake System Bleeding • Do not reuse the drained fluid. ...

Other information:

Hyundai Kona (OS) 2018-2020 Service Manual: ESP Control Unit Components and components location
Components 1. Front - right tube 2. Rear - left tube 3. Rear - right tube 4. Front - left tube 5. MC SEC 6. MC PRI 7. ESP control module (HECU) 8. Bracket ...

Hyundai Kona (OS) 2018-2020 Service Manual: Specifications
Specifications Items Specifications Rated voltage DC 12V Operating temperature range -40 to +176°F (-40°C to +80°C) Rated load Washer Washer : 6A (Motor load) ...