Strictly observe the following procedure to ensure proper bleeding and filling of the ESC unit, brake lines, and master cylinder.
Remove the reservoir cap and fill the reservoir with brake fluid.
Connect a clear plastic tube to the bleeder valve on the wheel cylinder and insert the other end of the tube into a clear plastic bottle half filled with fluid.
Connect the GDS to the data link connector located below the instrument panel.
Select and use in accordance with the instructions displayed on the GDS screen.
Select the vehicle model name.
Select ANTI-LOCK BRAKE SYSTEM.
Select the HCU bleeding mode.
Have another person slowly depress the brake pedal several times: once, then press and hold.
Loosen the right rear brake bleeder screw (A) to release system air. Then tighten the screw securely. (Before)(Rear)
Repeat the procedure described above for each wheel in the order indicated below until no air bubbles remain in the fluid.
Fill the brake master cylinder reservoir to the MAX level line.
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Test yourself
A quick Hyundai i20 quiz: every answer comes with an explanation and a link to the manual page.