Control Module, Installing On Hydraulic Unit

Special tools and workshop equipment required 

• Torque Screwdriver:VAG1624 
  Fig 1: Identifying Torque Screwdriver VAG1624

  Courtesy of AUDI
• Use a commercially available socket, not illustrated
• ESD Work Surface:VAS6613 
  Fig 2: ESD Work Surface

  Courtesy of AUDI

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.

-- 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 3: 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.

-- Install the hydraulic control unit. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .

Tightening Specifications

• Refer to OVERVIEW - CONTROL MODULE AND HYDRAULIC UNIT