2017 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. Install the power steering control module. (Except for STI model) <Ref. to INSTALLATION , Power Steering Control Module.>
    5. Connect the VDC Control Module & H/U connector.
    6. Install each brake pipe using a flare nut wrench.

    Tightening torque: 

    Refer to "COMPONENT" of "General Description". <Ref. to  VDC CONTROL MODULE & HYDRAULIC CONTROL UNIT (VDC Control Module & H/U)  , COMPONENT, General Description.> 

  2. Install the chamber assembly. (STI model) <Ref. to INSTALLATION , Chamber Assembly.>
  3. Install the engine control module (ECM). (Except for STI model) <Ref. to INSTALLATION , Engine Control Module (ECM).>
  4. Install the power steering control module. (Except for STI model) <Ref. to INSTALLATION , Power Steering Control Module.>
  5. Connect the battery ground terminal. <Ref. to BATTERY , NOTE, Note.>
  6. Bleed air from the brake system. <Ref. to PROCEDURE , Air Bleeding.>
  7. 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 VDC Control Module PARAMETER CHECK , MAINTENANCE MODE, VDC Control Module and Hydraulic Control Unit (VDC Control Module & H/U).>
    2. If the applied model and grade of the target vehicle are not included, perform parameter selection and registration. <Ref. to VDC Control Module PARAMETER SELECTION , MAINTENANCE MODE, VDC Control Module and Hydraulic Control Unit (VDC Control Module & H/U).>
  8. Perform "VDC sensor midpoint setting mode". <Ref. to VDC SENSOR MIDPOINT SETTING MODE , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDC Control Module & H/U).>
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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.