Air Bleeding Procedure for ESC Brake (Step 1)

Information 

This work is to be performed by two people.

• Main worker: Bleeds the system by manually opening and closing the bleed screw and detecting air coming out of brake lines.
• Assistant: Brake pedal operation and scanner operation inside the vehicle.

1. Connect the brake fluid filler to the reservoir tank.
   CAUTION:

   • Do not reuse the drained fluid.
   • Always use genuine DOT3/DOT4 brake Fluid.

     Using a non-genuine DOT3/DOT4 brake fluid can cause corrosion and decrease the life of the system.

   • Make sure that no dirt or other foreign matter is allowed to contaminate the brake fluid.
   • Do not spill brake fluid on the vehicle as it may damage the paint. If brake fluid comes in contact with the paint, wash off immediately with water.
   • Before air bleeding, check all the brake lines for leakage.
   • Check the entire braking system and HCU for normality and installation status.
   • Keep the pressurized state of 3 bar until the air bleeding is completed.
   • Never allow the master cylinder to run out of brake fluid when bleeding the braking system.
2. Remove the wheel and tire.

   (Refer to Suspension System - "WHEEL ")

3. The main worker connects the clear hose to the wheel bleeder screw (A) and sends a signal to assistant to depress the brake pedal.
4. The assistant to pump the brake pedal 2 times with normal brake force and then keep the brake pedal depressed.
5. While the assistant is depressing the brake pedal, loosen the bleed screw (A) momentarily to remove the air, and then fasten it again.
   NOTE: The bleed screw opens and closes only a quarter of a turn.

   [Front] 

   Tightening torque: 

   13.7 - 19.6 N.m (1.4 - 2.0 kgf.m, 10.1 - 14.4 lb.ft)

   Courtesy of KIA MOTORS AMERICA, INC.

   [Rear] 

   Tightening torque: 

   13.7 - 19.6 N.m (1.4 - 2.0 kgf.m, 10.1 - 14.4 lb.ft)

   Courtesy of KIA MOTORS AMERICA, INC.

6. Repeat the procedure for wheel in the sequence shown below until air bubbles no longer appear in the fluid.

   Courtesy of KIA MOTORS AMERICA, INC.

7. The above operation is repeated once more.
   NOTE: The work order is the same, but the pedals with a very strong and quick momentary force.
8. Release the brake pedal.
9. Check the brake pedal stroke.

   Pedal stroke:  135 ± 3 mm (5.3149 ± 0.1181 in.)