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ABS Hydraulic Control Unit (HCU) Bleeding

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When any part of the hydraulic system has been disconnected for repair or installation of new components, air can get into the system and cause spongy brake pedal action. This requires bleeding of the hydraulic system, including the hydraulic control unit (HCU) after it has been correctly connected.
NOTE: If the HCU or any component upstream of the HCU are installed new, carry out the brake system bleed procedure first without the scan tool, followed by the brake system bleed procedure using the scan tool.
NOTE: This procedure is only required when a new hydraulic control unit is installed.
  1. Connect the scan tool and follow the ABS HCU bleed instructions.
  2. Follow the pressure bleeding or manual bleeding procedure steps to bleed the system.
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