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ABS Hydraulic Control Unit (HCU) Bleeding

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. 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 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.
    WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in FIRE SUPPRESSION SYSTEM article. Failure to follow the instructions may result in serious personal injury.
  1. If equipped with fire suppression system, depower the system.
  2. Connect the scan tool and follow the ABS system bleed instructions.
  3. Follow the pressure bleeding or manual bleeding procedure steps to bleed the system.
    4. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM article. Failure to follow these instructions may result in serious personal injury.
  4. If equipped with fire suppression system, repower the system.
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