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

CAUTION:

Because the pressure sensor built into the H/U is easily damaged by static electricity, start the operation after performing static electricity measures.
Be careful not to touch the sensors in the H/U to prevent damage.
Because the seal of the VDCCM cannot be replaced, do not pull or peel it by lifting it up.
Because the screw of the H/U will become slightly worn in every replacement procedure, 5 times is the maximum number of times for replacement. If a problem is found such as not being able to torque the screw to specifications even before 5 replacement operations are performed, replace the H/U body.
When installing the VDCCM, always use new screws.
When the sealing surface of the VDCCM or H/U is dirty or damaged and it cannot be cleaned or repaired, replace with a new part.

Remove the VDCCM&H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>REMOVAL .
To prevent entry of foreign objects and brake fluid leakage, plug the oil pressure port of the VDCCM&H/U using a screw plug, etc.
Set the pump motor section of the removed VDCCM&H/U face down on a vise.
NOTE: Before securing a part on a vise, place cushioning material such as wood blocks, aluminum plate, or cloth between the part and the vise.

Fig 1: Identifying Aluminum Plate And Vise (Models With EyeSight And Models Without EyeSight)
Courtesy of SUBARU OF AMERICA, INC.
Using TORX® E5, remove the four screws from VDCCM.
CAUTION: Do not re-use the screws.

Fig 2: Identifying VDCCM Screws (Models With Eyesight And Models Without Eyesight)
Courtesy of SUBARU OF AMERICA, INC.
Slowly pull out the VDCCM upward from the H/U.
NOTE: To prevent damaging of coil section, remove the VDCCM straight up from H/U without twisting.
Make sure there is no dirt or damage on the sealing surface of the H/U.
CAUTION:
- Do not clean the VDCCM&H/U by applying compressed air.
- Even if damage is found on the H/U seal, do not attempt repair by filing or with a metal scraper. To remove the seal residue, always use a plastic scraper. Do not use chemical such as paint thinner, etc., to clean.
Position the coil of the new VDCCM to align with the H/U valve.
To prevent deformation of the VDCCM housing cover, hold the corner of VDCCM and install it to the H/U without tilting.
Using TORX® E5, gradually tighten new screws in order of (1) through (4).
CAUTION: Always use new screws.

Fig 3: VDCCM Screws (Models With Eyesight And Models Without Eyesight) Tightening Sequence
Courtesy of SUBARU OF AMERICA, INC.

Tightening torque:

1.5 N.m (0.15 kgf-m, 1.1 ft-lb)
Check that there is no foreign matter in mating surface between the VDCCM&H/U.
Using TORX® E5 again, gradually tighten the screws in order of (1) through (4).
Tightening torque:

3 N.m (0.31 kgf-m, 2.2 ft-lb)
Check that there is no gap in the mating surface between VDCCM&H/U.
Install the VDCCM&H/U to the vehicle.
CAUTION: When installing the VDCCM&H/U, replace the damper - hydraulic unit, spacer and nut with new parts. (Models without EyeSight)
Bleed air from the brake system. Ref. to BRAKE>Air Bleeding>PROCEDURE .
Perform the selection and registration operation of parameter.
NOTE:
- After replacing the VDCCM, be sure to perform the selection
- registration operation of parameter.
- For the selection and registration of parameter, the Subaru Select Monitor is required.
- 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 the parameter to confirm that the applied models and grades of the relevant vehicle are included. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Subaru Select Monitor>OPERATION>PARAMETER CHECK .
2. If the applied model and grade of the target vehicle are not included on the «Confirm on parameter» display screen, perform parameter selection and registration again. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Subaru Select Monitor>OPERATION>PARAMETER SELECTION .
Execute Clear Memory after parameter selection and registration operations because the DTC for "Parameter selection error" is memorized.