Begin the brake system bleeding process after installing a new Four Wheel Anti-Lock Brake System (4WABS) Hydraulic Control Unit (HCU) or after opening the HCU lines by first cleansing the
Brake Master Cylinder filler cap and using the specified brake fluid to refill the reservoir. The waste line needs connection to the RH rear bleeder screw while its other end goes into a container containing partial recommended brake fluid. A helper should apply pedal pressure as you tighten the RH rear bleeder screw after it has produced a fluid stream from the opened screw. The bleeding process should continue until the fluid remains both transparent and without air bubbles followed by necessary brake master cylinder reservoir refilling. Follow the bleeder procedure by first tightening and then uncoupling the waste line on the RH rear bleeder screw and continue with bleeding the LH rear bleeder screw followed by the RH front disc brake caliper bleeder screw and then the LH front disc brake caliper bleeder screw. Use the scan tool DCL cable adapter to attach it to the vehicle data link connector (DLC) under the dash and execute the scan tool instructions. Implement the bleeding procedure once more according to the initial method.