Control Module, Separating From Hydraulic Unit

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Special tools and workshop equipment required

ESD Work Surface: VAS6613

NOTE:

If the ABS Control Module -J104- is faulty, it can be replaced separately.

If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.

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.

CAUTION:

Risk of destroying the hydraulic unit.

The return flow pump may not be removed from the ABS Hydraulic Unit -N55-.
If the ABS Control Module -J104- is removed the circuit board is in the open.
Moisture and dirt must not enter the control module.
Avoid electrostatic charge. It can cause malfunctions in the electronic components if contact is made.

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

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 hydraulic unit.

Touch a grounded object (: VAS6613 ) before disconnecting the components.
Do not touch the connector terminals or electronic components directly.

-- 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.

-- Remove the control module vertically upward without tilting.

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

-- Check the hydraulic unit sealing surface 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:

There is a risk of destroying the hydraulic unit.

The seal must not be pulled out or raised up. The seal cannot be replaced.