Hyundai Equus: Troubleshooting
Second generation VI (2009–2024) / Hyundai Equus VI 2009-2024 Service Manual / Brake System / General Information / Troubleshooting
Second generation VI (2009–2024) / Hyundai Equus VI 2009-2024 Service Manual / Brake System / 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 cable length (Out of adjustment) 3. Parking brake cable (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 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 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. master cylinder 2. brake pad | replace replace |
| Brake vibration, pulsation | 1. brake booster 2. pedal free play 3. master cylinder 4. caliper 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 front disc brake piston
...
Brake System
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See also:
Solenoid Valve Description and Operation
Description
Four air spring solenoid valves (‘-’ control) and one
ambient solenoid valve are embedded inside this solenoid valve block as
shown in the circuit diagram below. When connecting the ...
Specifications
Specifications
ItemsSpecificationsRated voltageDC 12VOperating temperature range-22 ~ +176°F (-30°C ~ +80°C)Rated loadWasher switch0.2A (Relay load)
...
Underdrive Brake Control Solenoid Valve(UD/B_VFS) Repair procedures
Inspection
1.
Turn ignition switch OFF.
2.
Disconnect the E Module connector.
3.
Measure resistance between sensor signal terminal and sensor ground terminal.
4.
Check that the res ...
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