ABS Control Module -J104- /ABS Hydraulic Unit -N55-: Removing

WARNING: This page is about a different car, the 2015 Volkswagen Passat, 2014 Volkswagen Passat, 2013 Volkswagen Passat, and 2012 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying ABS And Brake Booster

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Component location:

The ABS Control Module -J104- is attached to the ABS Hydraulic Unit -N55- and is located inside the engine compartment on the right side.

ABS Hydraulic Unit -N55- with ABS Control Module -J104-
Brake booster with tandem brake master cylinder

Risk of destroying the brake lines by bending.

Never forcefully bend the brake lines in the hydraulic unit area.

-- Retrieve and note the coding from the ABS Control Module -J104- using the Vehicle Diagnostic Tester.

-- Take note of the radio code for vehicles with a coded radio. Ask if necessary.

-- Remove the engine cover. Refer to [For engine(s) CPRA, PKA] Removal and Installation [For transmission(s) 0A4, 9G] [For engine(s) CBTA, BUA] Removal and Installation [For transmission(s) 02E] [For engine(s) CDVB] Removal and Installation [For transmission(s) 0A4, 2E, 2Q] [For engine(s) CKRA] Removal and Installation [For engine(s) CVCA] Removal and Installation .

-- Disconnect the battery. Refer to [For transmission(s) 0A4, 2E, 9G, 2Q] [For engine(s) CVCA, DVB, PRA, BTA, PKA, KRA, BUA] Removal and Installation .

-- Open the clamps -4-.

Fig 2: Identifying Air Guide Pipe Bolt

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-- Remove the air guide hose -1-. Refer to [For engine(s) CPRA, PKA] Description and Operation [For transmission(s) 0A4, 9G] [For engine(s) CBTA, BUA] Description and Operation [For transmission(s) 02E] [For engine(s) CDVB] Description and Operation .

-- Remove the screw -arrow- for the air guide pipe -2-.

-- Remove the air guide pipe -2-.

-- Remove the intake hose -3- between the air guide pipe and the turbocharger.

-- Seal the turbocharger with the Engine Bung Set VAS6122.

-- If equipped, remove the nut -3-.

Fig 3: Identifying Heat Shield

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-- Unclip the heat shield -1- on the bulkhead -arrow-.

-- Remove the heat shield -1-.

-- Disconnect and remove the connector from the ABS Control Module -J104- in direction of -arrow-.

Fig 4: Identifying Direction To Release And Remove Connector From Control Module

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-- Insert the Brake Pedal Actuator VAG1869/2.

Fig 5: Identifying Brake Pedal Depressor V.A.G 1869/2

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-- Remove the caps from the bleeder valves on the left side.

Fig 6: Identifying Bleed Valve

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-- Attach the bleeder bottle bleed hose -1- to the left front brake caliper bleed valve.

Use suitable bleed hose. It must fit tightly on bleeder valve so that no air can get into brake system.

-- Open the bleeder valve.

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

Fig 7: Identifying V.A.G 1869/2

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-- Open the bleeder valve.

-- Push the brake pedal at least 60 mm using the Brake Pedal Actuator VAG1869/2.

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

Do not remove the Brake Pedal Actuator VAG1869/2.

-- Place a lint-free cloth under the ABS Control Module -J104- and the ABS Hydraulic Unit -N55-.

NOTE:

Make sure no brake fluid gets on the contact surfaces.

-- First label both brake lines from the brake master cylinder -A and B-.

Fig 8: Identifying Brake Lines (Brake Caliper) -1- To -4- And Brake Lines (Master Cylinder) -A To B-

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-- Remove the brake lines -A and B- from the ABS Hydraulic Unit -N55-.

-- Seal the brake lines and threaded holes immediately using Plugs1H0 698 311 A.

-- Label brake lines -1 through 4- and then remove them.

-- Seal the brake lines and threaded holes immediately using Plugs1H0 698 311 A.

-- Remove the hex fitting bolt from the bracket -arrow-.

-- Remove the ABS Hydraulic Unit -N55- with the ABS Control Module -J104- and the bracket sideways in direction of -arrow- from the rubber bushings on the console.

-- Turn the ABS Hydraulic Unit -N55- with the ABS Control Module -J104- upside down.

-- Unscrew and remove the bracket -Item 15 - from the ABS Hydraulic Unit -N55- inside the engine compartment.

-- Remove the ABS Hydraulic Unit -N55- with the ABS Control Module -J104-.