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Home >> Hyundai >> 2004 >> Sonata GLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> 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: Identifying Brake Fluid Reservoir
    G00753104Courtesy 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 Tube To Bleeder Screw
    G00753105Courtesy of HYUNDAI MOTOR CO.
  3. Connect Scan tool to the Data Link Connector located underneath the dash panel.
    Fig 3: View Of Scan Tool Connected To DLC
    G00753106Courtesy 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 (60sec) 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
      G00753107Courtesy of HYUNDAI MOTOR CO.
    5. Press "YES" to operate motor pump and solenoid valve.
      Fig 5: Pressing "Yes" On Scan Tool
      G00753108Courtesy 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: View Of ABS Air Bleeding Status
      G00753109Courtesy 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: Brake Bleeding Sequence
    G00753110Courtesy 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)