Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
VDC Control Module and Hydraulic Control Unit (VDCCM&H/U): Installation
- When installing the VDC CM&H/U to the VDC CM&H/U bracket, make sure that there is no oil adhered to the bolts and the threads of VDC CM&H/U. If the oil is adhered, degrease it carefully before tightening.
- Connect the VDC CM&H/U connector securely.
- Install the bracket COMPL hydraulic unit VDC and the hydraulic unit assembly VDC.
- Attach the bracket COMPL hydraulic unit VDC.
Tightening torque:
33 N.m (3.4 kgf-m, 23.8 ft-lb)
- Install the bracket hydraulic unit adapter to the hydraulic unit assembly VDC.
Tightening torque:
27 N.m (2.8 kgf-m, 19.9 ft-lb)
- Install the hydraulic unit sub assembly to the bracket COMPL hydraulic unit VDC.
Tightening torque:
7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
- Connect the hydraulic unit assembly VDC connector.
- Install the pipe assembly front ABS using a flare nut wrench.
Preparation tool:
Flare nut wrench
Tightening torque:
Refer to "COMPONENT" of "General Description" for the tightening torque. Refer to BRAKE>General Description>COMPONENT>FRONT BRAKE PIPES AND HOSES .
- Attach the bracket COMPL hydraulic unit VDC.
- Install the air intake boot.
- H4DO model: Refer to INTAKE (INDUCTION) (H4DO)>Air Intake Boot>INSTALLATION .
- H4DOTC model: Refer to INTAKE (INDUCTION) (H4DOTC)>Air Intake Boot>INSTALLATION .
- Connect the ground terminal to battery sensor. Refer to REPAIR CONTENTS>NOTE>BATTERY .
- Bleed air from the brake system. Refer to BRAKE>Air Bleeding>PROCEDURE .
- Perform parameter confirmation, selection, and registration.NOTE:
- When the VDC CM&H/U is replaced with a new part, be sure to perform the parameter selection/registration.
- When the registration has not been performed, the DTC code [Parameter selection error] is detected together with the ABS/EBD/VDC warning light illumination.
- Check that the applied model and grade of the relevant vehicle are included. Refer to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>MAINTENANCE MODE>VDCCM PARAMETER CHECK .
- If the applied model and grade of the target vehicle are not included, perform parameter selection and registration. Refer to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>MAINTENANCE MODE>VDCCM PARAMETER CHECK .
- Perform "VDC sensor midpoint setting mode". Refer 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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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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