Antilock Brake System Bleeding Procedures

BLEEDING ABS BRAKE SYSTEM

Antilock Brake System (ABS) system bleeding requires conventional bleeding methods plus use of the Diagnostic Readout Box (DRB) scan tool. The procedure involves performing a base brake bleeding, followed by use of the scan tool to cycle and bleed the Hydraulic Control Unit (HCU) pump and solenoids. A second base brake bleeding procedure is then required to remove any air remaining in the system.

Procedure

1. Perform base brake bleeding.
Brake Bleeding

2. Connect scan tool to the Data Link Connector.

3. Select ANTILOCK BRAKES, followed by MISCELLANEOUS, then ABS BRAKES. Follow the instructions displayed. when scan tool displays TEST COMPLETE, disconnect scan tool and proceed.

4. Perform base brake bleeding a second time.
Brake Bleeding

5. Top off master cylinder fluid level and verify proper brake operation before moving vehicle.