Control Module And Hydraulic Unit, Removing: Removing

Component location:

The control module is bolted to the hydraulic unit and is located at right in the engine compartment.

WARNING:

Do not bend the brake lines near the hydraulic unit.

-- Read and note the present control module coding.

-- Note or request radio code on vehicles with coded radio if necessary.

-- Disconnect battery, refer to REMOVAL AND INSTALLATION .

-- Remove engine cover.

All Vehicles

-- Release control module connector in direction of arrow -1- and pull off -2-.

Fig 1: Identifying Sequence To Release And Remove Control Module Connector

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-- Insert brake pedal actuator V.A.G 1869/2.

-- Attach bleeder hose of bleeder bottles to left-front and left-rear brake caliper bleeder valves and open bleeder valves.

-- Operate brake pedal using brake pedal depressor V.A.G 1869/2 at least 60 mm.

-- Close left front and left rear bleeder valves.

-- Do not remove brake pedal loading device V.A.G 1869/2.

-- Place sufficient lint-free cloths under the control module and hydraulic unit.

NOTE:

Make sure that brake fluid does not come in contact with the terminals.

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

Fig 2: Identifying Brake Line Connections

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-- Plug the brake lines and threaded holes immediately with sealing plugs from the repair kit Part No. 1H0 698 311 A.

-- Mark brake lines (brake caliper) -1 to 4-, unscrew and seal.

-- Pull hydraulic unit with control module upward out of shock absorbers.

Fig 3: Removing Hydraulic Unit With Control Module

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Control Module, Removing from Hydraulic Unit

-- Set hydraulic unit with control module upward onto a clean, level surface.

-- Remove inner TORX® bolts -arrows-.

Fig 4: Locating Control Module Torx Bolts

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-- Pull control module off from hydraulic unit -arrow- without angling.

Fig 5: Removing Control Module

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-- Carefully pull off all sealing rings from valve domes of hydraulic unit.

WARNING:

-- Cover control module magnetic coils with a lint free cloth.

After separating the control module and hydraulic unit, use transport protection for valve body.