Hyundai Elantra: Brake System / Specifications
Hyundai Elantra (CN7) 2021-2024 Service Manual / Brake System / Specifications
| Specifications |
|
Item
|
Specification
| |
| Master cylinder | Cylinder I.D. | 22.22 mm |
| Piston stroke | 45 ± 1 mm (1.77 ± 0.039 in) | |
| Fluid level switch | Provided | |
| Brake booster | Type | 10" Single |
| Boosting ratio | 8.0 : 1 | |
| Front brake (15 inch disc) | Type | Ventilated disc |
| Disc O.D. | Ø 280 mm (11.02 in) | |
| Disc thickness | 25 mm (0.98 in) | |
| Caliper piston | Single | |
| Cylinder I.D. | Ø 57.1 mm (2.25 in) | |
| Front brake (16 inch disc) | Type | Ventilated disc |
| Disc O.D. | Ø 305 mm (12.01 in) | |
| Disc thickness | 25 mm (0.98 in) | |
| Caliper piston | Single | |
| Cylinder I.D. | Ø 57.15 mm (2.25 in) | |
| Rear brake (14 inch disc) / Hand lever parking brake | Type | Solid disc |
| Disc O.D. | Ø 262 mm (10.31in) | |
| Disc thickness | 10 mm (0.39 in) | |
| Caliper piston | Single | |
| Cylinder I.D. | Ø 33.93 mm (1.34 in) | |
| Rear brake (15 inch disc) / Electric parking brake (EPB) | Type | Solid disc |
| Disc O.D. | Ø 284 mm (11.18in) | |
| Disc thickness | 10 mm (0.39 in) | |
| Caliper piston | Single | |
| Cylinder I.D. | Ø 34.00 mm (1.34 in) | |
| Rear drum brake | Type | Leading trailing |
| Drum I.D | Ø 203.2 mm (8 in) | |
| Brake lining thickness | 4.2 mm (0.17 in) | |
| Clearance adjustment | Automatic | |
Specification (VDC)
|
Part
|
Item
|
Standard value
|
Remark
|
| HECU | System | 4 Channel 4 Sensor control system | Total control (ABS, TCS, EBD, VDC) |
| Type | Motor, valve relay intergrated type | ECU, TCU and CAN | |
| Operating Voltage | 8V - 16V | ||
| Operating Temperature | -40°C - 110°C | ||
| Motor power | 310W [Normal] / 370W [Plus] | ||
| Active Wheel speed sensor (ABS) | Supply voltage | Front : 1.25 - 20VDC | |
| Rear : 4.5 - 20VDC | |||
| Output current low | Front : 7 ± 1.05 mA | ||
| Rear :11.2 - 16.8 mA | |||
| Output current high | Front : 14 ± 2.1 Ma | ||
| Rear : 11.2 ~ 16.8 mA | |||
| Output range | Front : 0.03 ~ 3,000 Hz | ||
| Rear : 0 ~ 2,500 Hz | |||
| Tone wheel | Front : 46 teeth, Rear : 46 teeth | ||
| Air gap | 0.4 - 1.0 mm | ||
| Steering Wheel Angle Sensor | Operating Voltage | 8V - 16V | |
| Current Consumption | Max. 150 mA | ||
| Output measurement range | -780 to + 779.9° | ||
| Operating Angular velocity | 0 - 1016°/sec |
Service Standard
|
Items
|
Standard value
|
| Brake pedal height | 135 ± 3 mm (5.31 ± 0.12 in) |
| Brake pedal Full stroke | 183 mm (7.20 in) |
| Stop lamp switch clearance | 1 - 2 mm (0.04 in - 0.08 in) |
| Brake pedal free play | 2 - 4 mm (0.08 in - 0.16 in) |
| Front brake disc pad thickness [15 inch] | 10.5 mm (0.41 in) |
| Front brake disc pad service limit [15 inch] | 2.0 mm (0.07 in) |
| Front brake disc pad thickness [16 inch] | 11 mm (0.43 in) |
| Front brake disc pad service limit [16 inch] | 2.0 mm (0.07 in) |
| Front disc thickness | 25 mm (0.98 in) |
| Front disc service limit | 23 mm (0.91 in) |
| Rear brake disc pad thickness | 10 mm (0.39 in) |
| Rear brake disc pad service limit | 2.0 mm (0.07 in) |
| Rear disc thickness | 10 mm (0.39 in) |
| Rear disc service limit | 8.4 mm (0.33) |
| Rear drum brake lining thickness | 4.2 mm (0.17 in) |
| Rear drum brake lining service limit | 1.0 mm (0.04 in) |
| Tightening Torques |
|
Items
|
N.m
|
kgf.m
|
lb-ft
|
| Master cylinder to brake booster | 9.8 - 15.7 | 1.0 - 1.6 | 7.2 - 11.6 |
| Brake booster mounting nuts | 16.7 - 25.5 | 1.7 - 2.6 | 12.3 - 18.8 |
| Air bleeding screw | 6.9 - 12.7 | 0.7 - 1.3 | 5.1 - 9.4 |
| Brake tube flare nuts, brake hose | 12.7 - 16.7 | 1.3 - 1.7 | 9.4 - 12.3 |
| Front caliper guide rod bolts | 21.6 - 31.4 | 2.2 - 3.2 | 15.9 - 23.1 |
| Rear caliper guide rod bolts | 21.6 - 31.4 | 2.2 - 3.2 | 15.9 - 23.1 |
| Front caliper mounting bolts | 78.5 - 98.1 | 8.0 - 10.0 | 57.9 - 72.3 |
| Rear caliper mounting bolts | 78.5 - 98.1 | 8.0 - 10.0 | 57.9 - 72.3 |
| Brake hose to caliper | 24.5 - 29.4 | 2.5 - 3.0 | 18.1 - 21.7 |
| Brake pedal member bracket bolts | 16.7 - 25.5 | 1.7 - 2.6 | 12.3 - 18.8 |
| Wheel speed sensor mounting bolt | 7.8 - 11.8 | 0.8 - 1.2 | 5.8 - 8.7 |
| ESC control unit bracket mounting nuts | 16.7 - 25.5 | 1.7 - 2.6 | 12.3 - 18.8 |
| Lubricants |
|
Items
|
Recommended
|
Quantity
|
| Brake fluid | DOT 4 | As required |
| Brake pedal hinge contacts | PDLV-1 (MS511-65) | 0.2 - 0.7g |
| Clevis hole inside | 0.1 - 0.5g | |
| Member side spring seating surface | ||
| Pedal arm side spring seating surface |
Troubleshooting
TroubleshootingProblem Symptoms TableUse the table below to help you find the cause of the problem. The numbers indicate the priority of the like cause of the problem...
Special service tools
Special Service Tools
Tool (Number and Name)
Illustration
Use
09581-11000Piston expanderSpreading the front disc brake piston...
Other information:
Hyundai Elantra (CN7) 2021-2024 Owner's Manual: Tire Terminology and Definitions
Air Pressure The amount of air inside the tire pressing outward on the tire. Air pressure is expressed in pounds per square inch (psi) or kilopascal (kPa). Accessory Weight This means the combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power seats, and air conditioning...
Hyundai Elantra (CN7) 2021-2024 Owner's Manual: Function operation
Function warning and control Intelligent Speed Limit Assist will warn and control the vehicle by ‘Displaying speed limit’, ‘Warning overspeed’ and ‘Changing set speed’. Information Function warning and control are described based on the Offset set to '0'...
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Front seat
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Your vehicle is equipped with a side air bag in each front seat. The purpose of the air bag is to provide the vehicle’s driver and the front passenger with additional protection than that offered by the seat belt alone.
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