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

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-- Insert the : VAG1869/2 between the brake pedal and driver seat. Press the brake pedal down at least 60 mm.

TIP:

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

CAUTION:

Leaking brake fluid increases the risk of injury.

Risk of skin irritation and injury.

- Wear safety gloves.

-- Remove the protective cap from the bleed screw on the left front caliper.

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-- Connect the hose -1- from the reservoir.

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

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

-- Repeat the procedure on the left rear brake caliper.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

Vehicles with a TDI engine:

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-- Remove the front exhaust pipe. Refer to the appropriate Service Information .

-- Remove the bolts -1- for the pendulum support.

Continuation for All Vehicles:

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-- If installed, release the catch in direction of -arrow-, pull the heat shield -1- off to the left and remove it.

-- Unclip the wiring guide.

-- Press the locking mechanism downward in direction of -arrow A-.

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-- Release the connector in direction of -arrow B-.

-- Remove the connector -1-.

Make sure that no brake fluid enters the control module connector housing. This could lead to contact corrosion and thereby cause the system to fail.
A contaminated connector housing must be carefully cleaned with compressed air.

-- To protect against escaping brake fluid, place enough lint-free cloths in the area below the hydraulic control unit.

Fig 1: Brake Lines, Attaching To Hydraulic Unit Sequence

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-- Mark the brake lines on the hydraulic control module.

CAUTION:

Risk of destroying the brake lines by bending.

- Never change the shape of the brake lines.

-- Remove the union bolts for the brake lines in the sequence -6 through 1- and push the brake lines slightly to the side.

-- Seal the brake lines and threaded holes immediately with clean plugs from the : VAS6122 .

-- Pull the hydraulic control unit -1- upward in direction of -arrow- and remove it.

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-- Should the hydraulic control module be replaced, remove the bolts -arrows- and remove the mounting bracket -1-.

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