Control Module, Installing On Hydraulic Unit

Special tools and workshop equipment required

Torque Screwdriver: VAG1624

Fig 1: Identifying Torque Screwdriver VAG1624
Courtesy of AUDI OF AMERICA, LLC
Electro-Static Discharge Work Surface: VAS6613

Fig 2: ESD Work Surface
Courtesy of AUDI OF AMERICA, LLC
Torx^® insert T25

Procedure

NOTE:

Replace the bolts after removing them.

CAUTION:

Risk of malfunction.

The sealing surface on the hydraulic unit must have a clean, even surface.
Replace the hydraulic unit if the sealing surface or contact tags are damaged.
The seal on the control module cannot be replaced.
The seal on the control module must not be pulled out or raised up.

NOTE:

Do not use aggressive cleaning agents (use the cleaning agent supplied).

Check the sealing surface for damage (visual check).

CAUTION:

There is a risk of destroying the ABS control module.

Moisture and dirt particles must not enter the inside of the control module.
Do not use compressed air to blow out the control module or hydraulic unit.
Protect the control module from bumps or impact. A control module that has fallen to the ground can no longer be used.

Surfaces must be cleaned before assembling.

-- Place the control module it onto hydraulic unit without tilting it.

NOTE:

The hydraulic unit threads cannot be re-cut to secure the control module. If the threads are damaged (bolts are difficult to install by hand or the bolts cannot be tightened to the tightening specification), the hydraulic unit must be replaced.

-- Tighten the hydraulic unit and control module with the supplied new Torx^® bolts -arrows- switching back and forth in two steps to the tightening specification.

Courtesy of AUDI OF AMERICA, LLC

NOTE:

A new control module may be installed a maximum of three times to a used hydraulic unit, to ensure that the elastic gasket seals sufficiently.

Do not install a used control module.

-- Install the ABS Control Module -J104- /ABS Hydraulic Unit -N55-. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING, VEHICLES WITH GASOLINE ENGINE WITHOUT HIGH-VOLTAGE SYSTEM .

-- Bleed the brake system. Refer to HYDRAULIC SYSTEM, BLEEDING .

NOTE:

If the ABS Control Module -J104- is being replaced, select the "Replace" function for the ABS Control Module -J104- on the, Guided Functions .

After Replacing the Control Module and Bleeding the Brake System:

All warning lamps for the ABS/ESP must go out.

WARNING:

Risk of accident!

Make sure the brakes are working correctly before driving the vehicle for the first time.

Tightening Specifications

Refer to OVERVIEW - CONTROL MODULE AND HYDRAULIC UNIT