2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

VDC Control Module And Hydraulic Control Unit (VDC CONTROL MODULE & H/U): Installation

CAUTION:
  • When installing the VDC CONTROL MODULE & H/U to the bracket - hydraulic unit, make sure that there is no oil adhered to the bolts and the threads of VDC CONTROL MODULE & H/U. If the oil is adhered, degrease it carefully before tightening.
  • Connect the VDC CONTROL MODULE & H/U connector securely.
  1. Install the bracket - hydraulic unit and the VDC CONTROL MODULE & H/U.
    1. Install the VDC CONTROL MODULE & H/U to the bracket - hydraulic unit.

      Tightening Torque: 

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

    2. Attach the bracket - hydraulic unit.

      Tightening Torque: 

      33 N.m (3.4 kgf-m, 23.8 ft-lb)

    3. Attach the bracket to the bracket - connector front. (Except for STI model)

      Tightening Torque: 

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

    4. Connect the VDC CONTROL MODULE & H/U connector.
    5. Install each brake pipe using a flare nut wrench.

      Tightening Torque: 

      Refer to "COMPONENT" of "General Description". Ref. to VEHICLE DYNAMICS CONTROL (VDC)>General Description>COMPONENT>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDC CONTROL MODULE & H/U) .

  2. Install the engine control module (ECM). (Except for STI model) Ref. to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>Engine Control Module (ECM)>INSTALLATION .
  3. Connect the battery ground terminal. Ref. to NOTE>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 VDC CONTROL MODULE & H/U is replaced with a new part, be sure to perform the selection. registration operation.
    • When the registration has not been performed, the DTC code "Parameter selection error" 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 (VDC CONTROL MODULE & H/U)>MAINTENANCE MODE>VDC CONTROL MODULE 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 (VDC CONTROL MODULE & H/U)>MAINTENANCE MODE>VDC CONTROL MODULE PARAMETER SELECTION .
  6. Perform "VDC sensor midpoint setting mode". Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDC CONTROL MODULE & H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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