Control Module, Separating From Hydraulic Unit

• The ABS Hydraulic Unit -N55- with the ABS Control Module -J104- must be removed in order to separate the control module and the hydraulic unit.
• The return flow pump may not be removed from the ABS Hydraulic Unit -N55-.

Special tools and workshop equipment required 

• ESD Work Surface:VAS 6613 
  Fig 1: ESD Work Surface

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• Torx insert T25

Procedure

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

-- Position the hydraulic unit with the control module from upward on the ESD Work Surface:VAS 6613  .

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-- Remove the three Torx bolts -arrows- and dispose of them immediately.

-- Push together the hydraulic unit with the loosened control module all around and position with the control module upward on the ESD Work Surface:VAS 6613  .

-- Remove the control module -1- without tilting carefully at an angle upward out of the hydraulic unit -2-.

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• Blowing the control module or hydraulic unit out with compressed air is not permitted.
• The valve bodies inside the hydraulic unit must not be damaged or bent.

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

-- Cover the open hydraulic unit with a lint-free cloth.

• A damaged sealing surface must not be mechanically reworked. A hydraulic unit with a damaged sealing surface must be replaced.