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.
Control Module, Installing On Hydraulic Unit: Procedure: Notes
- Use the complete repair kit when installing.
- Protect the ABS control module from bumps or impact. A control module that has fallen to the ground can no longer be used.
-- Place the control module -2- carefully from above on the hydraulic unit without tilting.
-- Install the new bolts -1- by hand until the control module touches the hydraulic unit evenly.
If the bolts for the control module on the hydraulic unit are difficult to install or cannot be tightened to the tightening specification, then the hydraulic unit must be replaced.
-- Tighten the bolts in two stages in a diagonal sequence.
-- Install the hydraulic control unit. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
-- After installing the hydraulic control unit and bleeding the brake system, select the "Replace" function for the ABS Control Module -J104- /ABS Hydraulic Unit -N55- using the Vehicle Diagnostic Tester, Guided Functions .
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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.