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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLVEHICLE DYNAMICS CONTROL (VDC) SYSTEMVDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)INSTALLATION
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

VDC Control Module and Hydraulic Control Unit (VDCCM & H/U): Installation

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Installation
CAUTION:
  • When installing the VDCCM & H/U to the bracket - hydraulic unit, make sure that there is no oil adhered to the bolts and the threads of VDCCM & H/U. If the oil is adhered, degrease it carefully before tightening. 
  • Connect the VDCCM & H/U connector securely. 
  1. Install the bracket - hydraulic unit and the VDCCM & H/U.
    1. Attach the bracket - hydraulic unit.

      Tightening torque: 

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

    2. Install the VDCCM & H/U to the bracket - hydraulic unit.

      Tightening torque: 

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

    3. Connect the VDCCM & H/U connector.
    4. Install each brake pipe using a flare nut wrench.

      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. 

      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. 

      G00611053Courtesy of SUBARU OF AMERICA, INC.
      G00611054Courtesy of SUBARU OF AMERICA, INC.
  2. Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO (EXCEPT FOR HEV))>AIR INTAKE BOOT>REMOVAL .
  3. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
    NOTE:

    For the hybrid model, connect the battery negative terminal. 

  4. Bleed air from the brake line.
  5. Perform parameter confirmation, selection, and registration.
    NOTE:
    • When the VDCCM & 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 [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 .
RENDER: 1.0x

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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.