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Home >> Hyundai >> 2005 >> Sonata GLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Abs (Anti-Lock Brake System) >> Bleeding Brake System

Bleeding Brake System

This procedure should be used to insure adequate bleeding and filling of ABS unit, brake lines, master cylinder.

  1. Remove the reservoir cap and fill the brake reservoir with brake fluid.
    CAUTION: Do not allow brake fluid to remain on a painted surface. 
    Wash it off immediately.
    NOTE: When bleeding by pressured fluid, do not depress the brake pedal. 
    Recommended fluid.........DOT3 or DOT4
    Fig 1: Removing Reservoir Cap
    G03858862Courtesy of HYUNDAI MOTOR CO.
  2. Connect the clear plastic tube to the wheel cylinder bleeder plug and insert the other end of the tube in a half filled clear plastic bottle half filled with brake fluid.
    Fig 2: Connecting Clear Plastic Tube To Wheel Cylinder Bleeder Plug
    G03858863Courtesy of HYUNDAI MOTOR CO.
  3. Connect Scan tool to the Data Link Connector located underneath the dash panel.
    Fig 3: Connecting Scan Tool To Data Link Connector
    G03858864Courtesy of HYUNDAI MOTOR CO.
  4. Select and operate according to the instructions on the Scan tool screen.
    CAUTION: You have to obey maximum operating time (60 sec) of ABS motor with Scan tool to prevent motor pump burnt. 
    1. Select Hyundai vehicle diagnosis.
    2. Select vehicle name.
    3. Select Anti-Lock brake system.
    4. Select air bleeding mode.
      Fig 4: Selecting Air Bleeding Mode (1 Of 3)
      G03858865Courtesy of HYUNDAI MOTOR CO.
    5. Press 'YES' to operate motor pump and solenoid valve.
      Fig 5: Selecting Air Bleeding Mode (2 Of 3)
      G03858866Courtesy of HYUNDAI MOTOR CO.
    6. 'ON' and 'OFF' control are automatically performed to prevent the motor pump from being burnt.

      (If not, you may damage the motor).

    Fig 6: Selecting Air Bleeding Mode (3 Of 3)
    G03858867Courtesy of HYUNDAI MOTOR CO.
  5. 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.
  6. Repeat the step 5. until there are no more bubbles in the fluid for each wheel in the sequence shown in the illustration.
    Fig 7: Loosening Bleeder Screw
    G03858868Courtesy of HYUNDAI MOTOR CO.
  7. Tighten the bleeder screw.

    Bleeder screw tightening torque: 

    7~13 Nm (70~130 kg.cm, 5.2~9.6 lb.ft)