Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Hydraulic Control Unit

Removal
1. Disconnect the battery ground cable.





2. Disconnect the anti-lock-brake control module electrical connector.

3. NOTE: The 4 wheel anti-lock brake system (4WABS) with traction control is shown, the 4WABS without traction control system is similar with one less hydraulic line.

NOTE: Plug brake lines to prevent any brake fluid loss.





Disconnect the brake lines from the hydraulic control unit (HCU).





4. Remove the HCU bracket nuts to HCU.





5. Remove the HCU.





6. Remove the pump motor electrical connector.





7. Remove the anti-lock-brake control module screws.
8. Remove the anti-lock-brake control module from the HCU.

Installation

1. NOTE: The brake system must be bled after the HCU is installed or replaced.








To install, reverse the removal procedure.