Control Module, Disconnecting And Connecting To Hydraulic Unit: Notes

Special tools and workshop equipment required 

• ESD Work Surface :VAS 6613 

The ABS Control Module -J104- will be called the control module in the information that follows.

ABS Hydraulic Unit -N55- will be subsequently called hydraulic unit.

Condition

• If the control module is faulty, then the control module must be separated from the hydraulic unit and only the control module replaced.
• If the hydraulic unit is faulty, the hydraulic unit and the control module must be replaced together.
• The seal on the control module must not be pulled out or raised up.

-- Remove the control module and hydraulic unit. Refer to ABS Control Module J104/ABS Hydraulic Unit N55, Removing and Installing  .

-- Place the hydraulic unit with the control module on the ESD Work Surface :VAS 6613  .

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Control module with three bolts

-- Remove the bolts -1- through -3-.

Continuation for all vehicles

Control module with four bolts

-- Remove the bolts -1- through -4-.

Continuation for all vehicles

-- Remove the control module -1- evenly in the -direction of the arrows- from the hydraulic unit -2-.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Cover the hydraulic unit actuators -2- with a lint-free cloth.

Connecting is done in reverse order, at the same time note the following:

Condition

• If a thread is damaged in the hydraulic unit, the hydraulic unit must be replaced.
• If the hydraulic unit sealing surface is damaged (for example through grooves or scrapes) the hydraulic unit must be replaced with the control module.
• The seal on the control module must not be pulled out or raised up.

-- Clean the sealing surfaces between the hydraulic unit and control module with a lint-free cleaning cloth.

-- Place the control module evenly on the hydraulic unit.