Control Module, Separating From Hydraulic Unit

Special Tools And Workshop Equipment Required

ESD Work Surface:VAS6613
TORX^® insert T25
Plugs:1H0 698 311 A

Fig 1: Identifying Sealing Plug Repair Set, Part No. 1 H0 698 311 A
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If the control module is faulty, then the control module is to be separated from the hydraulic unit and only the control module replaced.
If the hydraulic unit is faulty, the hydraulic unit and the control module are to be replaced together.
The ESP unit must be removed in order to separate the control module and the hydraulic unit.

CAUTION:

There is a risk of destroying the hydraulic unit by removing the return flow pump.

- Never separate the return flow pump from the hydraulic unit.

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.

-- Remove the ABS Hydraulic Unit -N55- together with the ABS Control Module -J104-. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .

The transportation protection for the valve body must be installed on the ABS Hydraulic Unit -N55- after separating the ABS Control Module -J104- from the ABS Hydraulic Unit -N55-.

The warranty on the ABS Hydraulic Unit -N55- will not be honored if the transportation protection is missing.

Transportation protection for valve body (foam)
M10 Plug
M12 Plug

-- Touch a grounded object before working on electrical equipment :VAS6613 . Do not touch the connector terminals or electronic components directly.

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

-- Position the hydraulic unit with the control module from upward on the :VAS6613 .

-- Remove the bolts -arrows-.

Fig 2: Identifying ABS Hydraulic Unit Screws

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the three TORX^® bolts from the control module and set aside immediately (risk of confusing them with new TORX^® bolts).

-- Remove the ABS Control Module -J104- from the ABS Hydraulic Unit -N55- in the direction of -arrow- without tilting it.

Fig 3: Identifying Removal Of Control Module From Hydraulic Unit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Carefully remove all the seals from the valve domes on the ABS Hydraulic Unit -N55-.

-- Cover the control module solenoid coils with a lint free cloth.

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

The hydraulic unit sealing surface must not be worked with a file, metal scraper, sand paper or similar.

If the hydraulic unit sealing surface is damaged (for example through grooves or scrapes) the hydraulic unit must be replaced with the control module.

The seal on the control module must not be pulled out or raised up.

The seal on the control module cannot be replaced.