ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING: Removing

• If the ABS Control Module -J104- is faulty, it can be replaced separately.
• If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.

-- If the ABS Control Module -J104- is replaced, select the "Control module, replacing" program. Refer to DIAGNOSTIC ENTRY .

-- If the ABS Hydraulic Unit -N55- is replace, select the "Hydraulic Unit, Replacing" program. Refer to DIAGNOSTIC ENTRY .

-- Follow the instructions in the Vehicle Diagnostic Tester display.

-- Insert the Brake Pedal Actuator:VAG1869/2  -A- between the brake pedal and driver seat. Pretension the brake pedal at least 60 mm.

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By doing this, the valves in the brake master cylinder are closed and the brake fluid reservoir does not run empty.

• Depending on the wheel combination, remove the wheels. Refer to WHEELS AND TIRES .

-- Remove the protective cap -3- from the bleeder valve -1- on the respective brake caliper.

Fig 1: Identifying Protective Cap, Bleed Screw And Container Bleeder Hose

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-- Attach the bleeder hose -2- from the bleeder bottle to the bleeder screw for the left front brake caliper.

-- Open the bleed screw to reduce the pressure in the hydraulic system.

-- Close the bleeder screw.

-- Attach the bleeder bottle bleed hose -1- to the left rear brake caliper bleeder screw.

Fig 2: Identifying V. A. G 1869/2

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-- Open the bleed screw to reduce the pressure in the hydraulic system.

-- Close the bleed screw and remove the collection bottle.

• Do not remove the Brake Pedal Actuator:VAG1869/2  .

-- Place enough lint-free cloths under the ABS Control Module -J104- and the ABS Hydraulic Unit -N55-.

-- First, mark both brake lines -2- from the brake master cylinder and remove from the hydraulic unit.

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-- Immediately close open connections with a clean plug.

-- Label and remove the remaining brake lines -1-.

-- Immediately close open connections with a clean plug -2-.

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-- Release and remove the connector -3-.

-- Make sure that no brake fluid enters the control module connector housing.

-- Free up the wire.

-- Carefully pull the ABS Control Module -J104- /ABS Hydraulic Unit -N55- -1- off of the pins on the bracket -3- and remove.

-- If necessary, remove the bolt -4- and the bracket -1-.

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