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

-- If replacing the control module, select the "Replace control module" program using the Vehicle Diagnostic Tester DIAGNOSTIC ENTRY .

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

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TIP:

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

-- Remove the protective cap -3- from the bleed screw -1- on a front brake caliper.

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

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-- Connect the bleeder bottle hose -2-.

-- 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 a rear brake caliper.

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

-- Remove the engine/motor control module. Refer to ENGINE CONTROL MODULE -J623-, REMOVING AND INSTALLING (2.0L) / ENGINE CONTROL MODULE -J623-, REMOVING AND INSTALLING (3.0L, 2.9L) .

-- If necessary, free up the coolant line -3- and the wiring harness -2-.

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-- Depending on the model, remove two or three bolts -arrows- and remove the engine/motor control module mount.

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

-- Mark the brake lines for reinstallation.

-- Remove the brake lines -1 and 2- from the ABS Hydraulic Unit -N55-.

Fig 2: Hand Tightening Union Bolts

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