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

WARNING:

Do not bend the brake lines past their form or damage them.

A bent or damaged brake line must be replaced.

-- Get the coding from the control module mount and write it down. Refer to Vehicle Diagnostic Tester.

Audi Q3

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-- Remove the battery and the battery tray. Refer to BATTERY, REMOVING AND INSTALLING and BATTERY TRAY, REMOVING AND INSTALLING .

Audi RS Q3

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-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING .

-- Remove the bolts -arrows- and remove the bracket -1- for the air filter housing.

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Continuation for All Vehicles

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-- Open the bracket for the wiring guide in direction of -arrows- and push the wires aside.

-- Remove the wiring guide.

-- Push the red locking slide downward in direction of -arrow-.

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-- Release the connector in direction of -arrow- and disconnect it.

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

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NOTE:

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

WARNING:

Risk of skin irritation.

To prevent skin contact with brake fluid, wear chemical resistant protective gloves.

-- Remove the protective cap from the left front brake caliper bleeder screw.

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-- Place the container bleed hose -1- on the bleeder screw.

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

NOTE:

The 1LJ 1ZD brakes are illustrated.

-- Remove the protective cap from the left rear brake caliper bleeder screw.

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-- Place the container bleed hose -1- on the bleeder screw.

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

-- Close the left front and left rear bleeder screws.

NOTE:

Do not remove the :VAG1869/2 .

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

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CAUTION:

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

-- Remove the union bolts -arrows- and remove the brake lines -1 and 2-.

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-- Immediately seal off the brake lines and the threaded holes with the plugs from Repair Kit:1H0 698 311 A .

WARNING:

Do not bend the brake lines past their form or damage them.

A bent or damaged brake line must be replaced.

-- Label the remaining brake lines to the brake calipers, then remove and seal them.

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-- Remove the union bolts, tie the brake lines upward and seal them.

-- Immediately seal off the brake lines and the threaded holes with the plugs from Repair Kit:1H0 698 311 A .

-- Lift the hydraulic unit with the control module upward and out of the rubber buffers in direction of -arrow-.

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-- Remove the bolts -arrows- and the bracket -1-.

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