Control Module, Separating From Hydraulic Unit

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Special tools and workshop equipment required

ESD Work Surface: VAS6613

The ABS Hydraulic Unit -N55- with the ABS Control Module -J104- must be removed in order to separate the control module and the hydraulic unit.
The return flow pump must not be separated from the ABS Hydraulic Unit -N55-.

Procedure

-- Remove the hydraulic control unit. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .

CAUTION:

There is a risk of destroying the control module through the electrostatic charge and reduced cleanliness.

- Discharge electrostatic charge: touch the electro-static discharge work surface

- Protect the inner control module from moisture and dirt.

-- Place the hydraulic unit with the control module on the : VAS6613 .

The control module -2- faces upward and the hydraulic unit -4- with the pump motor and connector -3- faces down.

Fig 1: Identifying Hydraulic Unit
Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1- and dispose of them.

-- Carefully remove the control module vertically upward without tilting.

Blowing the control module or hydraulic unit out with compressed air is not permitted.
The valve bodies inside the hydraulic unit must not be damaged or bent.

-- Cover the open hydraulic unit with a lint-free cloth.

-- Check the hydraulic unit sealing surface, and if necessary, clean with mineral spirits and a lint-free cloth.

-- A damaged sealing surface must not be mechanically reworked. A hydraulic unit with a damaged sealing surface must be replaced.

CAUTION:

Risk of damaging the control module due to improper handling.

- Do not remove or lift the seal.