Hyundai Elantra: Brake System / Brake bleeding procedures

Hyundai Elantra (CN7) 2021-2025 Service Manual / Brake System / Brake bleeding procedures

Brake System Bleeding

Nomal Brake System

•	Do not reuse the drained fluid.

•	Always use genuine DOT4 brake Fluid.

•	Before opening the reservoir cap, be sure to remove any debris around the reservoir and reservoir cap.

•	Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.

•	Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.

1.	Make sure the brake fluid in the reservoir is at the MAX (upper) level line.

2.	Have someone slowly pump the brake pedal several times, and then apply pressure.

3.	Loosen the right-rear brake bleed screw (A) to allow air to escape from the system. Then tighten the bleed screw securely. [Front] [Rear torsion beam parking cable type] [Rear torsion beam EPB type] [Rear multi link parking cable type] [Rear multi link EPB type] [Rear drum brake type]

4.	Repeat the procedure for wheel in the sequence shown below until air bubbles no longer appear in the fluid.

5.	Follow the sequence as shown below.

6.	Refill the master cylinder reservoir to MAX (upper) level line.

ESC Bleeding of Brake System

This procedure should be followed to ensure adequate bleeding of air and filling of the ESC unit, brake lines and master cylinder with brake fluid.

Remove the reservoir cap and fill the brake reservoir with brake fluid.

•	When pressure bleeding, do not depress the brake pedal.

•	Recommended fluid : DOT4

2.	Connect a clear plastic tube to the wheel cylinder bleeder plug and insert the other end of the tube into a half filled clear plastic bottle.

3.	Connect the diagnostic tool to the data link connector located underneath the dash panel.

4.	Select and operate according to the instructions on the diagnostic tool screen.

5.	Have someone slowly pump the brake pedal several times, and then apply pressure.

Pump the brake pedal several times, and then loosen the bleeder screw until fluid starts to run out without bubbles. Then close the bleeder screw (A).

[Front]

[Rear torsion beam parking cable type]

[Rear torsion beam EPB type]

[Rear multi link parking cable type]

[Rear multi link EPB type]

[Rear drum brake type]

7.	Repeat the procedure for wheel in the sequence shown below until air bubbles no longer appear in the fluid.

8.	Follow the sequence as shown below.

9.	Refill the master cylinder reservoir to MAX (upper) level line.

Special service tools

Special Service Tools Tool (Number and Name) Illustration Use 09581-11000Piston expanderSpreading the front disc brake piston...

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Tachometer

The tachometer indicates the approximate number of engine revolutions per minute (RPM).

Use the tachometer to select the correct shift points and to prevent lugging and/ or over-revving the engine.

NOTICE

Do not operate the engine within the tachometer's RED ZONE. This may cause severe engine damage.