Control Module, Installing On Hydraulic Unit

Special tools and workshop equipment required

Procedure

Use the complete repair kit when installing.
A new control module may be installed a maximum of three times to a used hydraulic unit to ensure that the elastic seal seals sufficiently.
Do not install a used control module.
Excessive shaking (for example, dropping, impact) may destroy the control module. The control module must then no longer be used.
The hydraulic unit threads cannot be re-cut to secure the control module. If the thread is damaged, the hydraulic unit must be replaced.
If the bolts are difficult to install by hand or cannot be tightened to the tightening specification, then the thread is damaged.
If the ABS Control Module -J104- /ABS Hydraulic Unit -N55- is being replaced, select the function on the Vehicle Diagnostic Tester.

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

The hydraulic unit -4- with the pump motor and the connector -3- faces down.

Fig 1: Identifying Hydraulic Unit
Courtesy of AUDI

-- Place the control module -2- carefully from above on the hydraulic unit without tilting.

-- Install the new bolts -1- by hand until the control module touches the hydraulic unit evenly.

Replace the hydraulic unit if the bolts for the control module on the hydraulic unit are difficult to install or cannot be tightened to the tightening specification.

-- Tighten the bolts in two stages in a diagonal sequence.

-- Code the ABS Control Module -J104- using the Vehicle Diagnostic Tester. A basic setting must be performed at the same time.

Tightening Specifications