Hydraulic Brake System Bleeding (ABS)

Hydraulic Brake System Bleeding (ABS)





Notice: Pressure bleeding equipment must be of the diaphragm type. It must have a rubber diaphragm between the air supply and the brake fluid to prevent air, moisture, oil and other contaminants from entering the hydraulic system.

1. Disconnect the master cylinder electrical connector.
2. Remove the master cylinder reservoir cap.




3. Connect the bleeder with the adapter to the master cylinder reservoir.
4. For vehicles with the antilock braking system (ABS), locate and remove the hydraulic modulator bleeder valves.
5. Charge the bleeder ball to 140-172 kPa (20-25 psi).
6. Connect the line to the adapter. Open the line valve.
7. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

Important: The bleeding sequence is as follows: right rear, left front, left rear, and right front.


8. Attach the bleeder hose to the bleeder valve. Submerge the opposite end of the hose in a clean container partially filled with brake fluid.
9. Open the bleeder valve 1/2-3/4 turn and allow the fluid to flow until no air is seen in the fluid.





Notice: After the brake system bleeding procedure is complete, wrap a shop towel around the bleeder adapter and all hose connections before disconnecting. The brake reservoir may have residual pressure after the bleeding operation and failure to properly maintain the brake fluid may result in damage to components and painted surfaces.

10. Inspect the brake pedal for sponginess. Repeat the entire bleeding procedure to correct this condition.