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Home >> Subaru >> 2023 >> Forester Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Dynamics Control (VDC) System >> VDC Control Module and Hydraulic Control Unit (VDCCM & H/U) >> Installation
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VDC Control Module and Hydraulic Control Unit (VDCCM & H/U): Installation

CAUTION:
  • When installing the hydraulic unit assembly VDC to the bracket COMPL hydraulic unit VDC, make sure that there is no oil adhered to the bolts and the threads of hydraulic unit assembly VDC. If the oil is adhered, degrease it carefully before tightening.
  • Connect the hydraulic unit assembly VDC connector securely.
  1. Install the bracket COMPL hydraulic unit VDC and the hydraulic unit assembly VDC.
    1. Attach the bracket COMPL hydraulic unit VDC.

      Tightening torque: 

      33 N.m (3.4 kgf-m, 24.3 ft-lb)

    2. Install the hydraulic unit to the bracket COMPL hydraulic unit VDC.

      Tightening torque: 

      7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    3. Connect the hydraulic unit assembly VDC connector.
    4. Install each brake pipe.

      Preparation tool: 

      Flare nut wrench

      Crowfoot wrench

      NOTE: If the work can be performed with the front and back sides reversed, it is also possible to use a 6-point crowfoot wrench.
      TIGHTENING TORQUE SPECIFICATION

      Calculation formula
      T1 = 15 N.m (1.5 kgf-m, 11.1 ft-lb) - L1/(L1 + L2)
      T2 = 19 N.m (1.9 kgf-m, 14.0 ft-lb) - L1/(L1 + L2)
      T: Reading of the torque wrench
      L1: Effective length of the torque wrench
      L2: Effective length of the crowfoot wrench
      NOTE: If the effective length of the tool used is unknown, consult the manufacturer of the tool.
    G16349749Courtesy of SUBARU OF AMERICA, INC.
    1. Effective length of the crowfoot wrench (L2)
    2. Effective length of the torque wrench (L1)
    3. Center of the open end of crowfoot wrench
    4. Center of drive square of the torque wrench
    5. Center of the position where a force is applied by hand
    Fig 1: Hydraulic Unit Assembly Nuts With Torque Specification
    G14385121Courtesy of SUBARU OF AMERICA, INC.
  2. Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO)>AIR INTAKE BOOT>INSTALLATION .
  3. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  4. Bleed air from the brake system. Ref. to BRAKE>AIR BLEEDING>PROCEDURE .
  5. Perform parameter confirmation, selection, and registration.
    NOTE:
    • When the hydraulic unit assembly VDC is replaced with a new part, be sure to perform the parameter selection • registration operation.
    • When the registration has not been performed, the DTC code SELECTED PARAMETER is detected together with the ABS/EBD/VDC warning light illumination.
    1. Check that the applied model and grade of the relevant vehicle are included. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)>MAINTENANCE MODE>VDCCM PARAMETER CHECK .
    2. If the applied model and grade of the target vehicle are not included, perform "parameter selection and registration". Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)>MAINTENANCE MODE>VDCCM PARAMETER SELECTION .
  6. Perform VDC sensor midpoint setting mode. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE .
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