ABS Control Module -J104-, ATTACHING TO ABS Hydraulic Unit -N55- (MARK 70 ABS/ASR): Installing

Assembly is performed in reverse order. Note the following:

WARNING: Excessive shaking (for example, dropping, impact) can damage the ABS Control Module -J104-. Do not use the ABS Control Module -J104- again if this happens.

NOTE:

A new ABS Control Module -J104- can be installed on an old ABS Hydraulic Unit -N55- maximum twice. This assures the elastic seal will not leak.

A used ABS Control Module -J104- may not be installed a second time.

Surface must be cleaned before assembling.

-- Slide all sealing rings -A- slightly over the valve dome.

Fig 1: Identifying Sealing Rings

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Place the ABS Control Module -J104- on the ABS Hydraulic Unit -N55- without tilting it.

Fig 2: Control Module Pulled Off From Hydraulic Unit Without Angling

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Sealing rings are then brought into their end position.

-- Install the ABS Hydraulic Unit -N55- and ABS Control Module -J104- with the new bolts -arrows- provided.

Fig 3: Locating Control Module Torx Bolts

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If a new ABS Control Module -J104- was installed, it must be coded.

Use the Vehicle Diagnostic Tester.

Chassis
Brake System
Anti-lock braking system Anti-lock Brake System (ABS)/ASR Mark 70
Function
Anti-lock Brake System (ABS) Control Module J104, coding