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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System >> Air Bleeding >> Procedure >> Hydraulic Control Unit

Hydraulic Control Unit

  1. Perform steps 1) to 23) in procedure
  2. for air bleeding of the brake line. Refer to BRAKE>AIR BLEEDING>PROCEDURE>BRAKE LINE .
    CAUTION:
    • If there is a possibility that air enters the pressure control section in the hydraulic control unit, perform steps 12) to 17) in procedure 2.
    • For normal air bleeding operation, do not operate the sequence control for the hydraulic control unit. (Operating the sequence control may let air in the normal air bleeding passages move to the pressure control section.)
    • Always start the operations in ABS sequence control mode prior to VDC sequence control mode.
    NOTE: If there is a possibility that air enters the pressure control section in the hydraulic control unit, perform the sequence control mode for both of the ABS and VDC systems. (Refer to steps 11) to 17) for brake lining.)