ESC System Bleeding

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:

   • If there is any brake fluid on any painted surface, wash it off immediately.
   • 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
   NOTE:

   • You must obey the maximum operating time of the ESC motor with the GDS to prevent the motor pump from burning.
     1. Select vehicle name.
     2. Select ABS/ESC system.
     3. Select HCU air bleeding mode.
        Fig 1: Scantool Display - Vehicle S/W Management

        Courtesy of HYUNDAI MOTOR AMERICA
        Fig 2: Scantool Display - HCU Air Bleeding Mode

        Courtesy of HYUNDAI MOTOR AMERICA
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 (A).

   [Front] 

   Fig 3: Locating Bleeder Screw - Front

   Courtesy of HYUNDAI MOTOR AMERICA

   [Rear Disc Brake] 

   Fig 4: Locating Bleeder Screw - Rear Disc Brake

   Courtesy of HYUNDAI MOTOR AMERICA

   [Rear Drum Brake] 

   Fig 5: Locating Bleeder Screw - Rear Drum Brake

   Courtesy of HYUNDAI MOTOR AMERICA
6. Repeat the procedure for wheel in the sequence displayed below until air bubbles no longer appear in the fluid.
   Fig 6: Brake Bleeding Sequence

   Courtesy of HYUNDAI MOTOR AMERICA
7. Refill the master cylinder reservoir to MAX (upper) level line.