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Home >> Hyundai >> 2020 >> Sonata SEL >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System - General Information (Except HEV) >> Brake Bleeding Procedures >> Brake System Bleeding >> ESC Bleeding of Brake System

ESC Bleeding of Brake System

CAUTION:
  • Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.

    (Refer to General Information - "LIFT AND SUPPORT POINTS ")

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.

  1. Remove the reservoir cap and fill the brake reservoir with brake fluid.
    NOTE:
    • When pressure bleeding, do not depress the brake pedal.
    • Recommended fluid........ DOT3 or 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 GDS to the data link connector located underneath the dash panel.
  4. Select and operate according to the instructions on the GDS screen.
    G14525986Courtesy of HYUNDAI MOTOR AMERICA
    G14525987Courtesy of HYUNDAI MOTOR AMERICA
  5. Have someone slowly pump the brake pedal several times, and then apply pressure.
  6. 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).

    Tightening torque: 

    6.8 - 12.7 N.m (0.7 - 1.3 kgf.m, 5.0 - 9.4 lb-ft)

    [Front] 

    G14525988Courtesy of HYUNDAI MOTOR AMERICA

    [Rear] 

    G14525989Courtesy of HYUNDAI MOTOR AMERICA
  7. Repeat the procedure for wheel in the sequence shown below until air bubbles no longer appear in the fluid.
    G14525990Courtesy of HYUNDAI MOTOR AMERICA
  8. Refill the master cylinder reservoir to MAX (upper) level line.