ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING, WITH 4-CYLINDER GASOLINE ENGINE AND ABS MARK 70 ABS/ASR: Removing

WARNING: This page is about a different variant/trim than selected.

Fig 1: Configuration

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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

WARNING:

Do not bend the brake lines near the ABS Hydraulic Unit -N55- !

-- Retrieve the coding from the ABS Control Module -J104- and write it down. Refer to Vehicle Diagnostic Tester.

NOTE:

The battery ground cable must be disconnected for the following procedure. Check if a coded radio is installed. If necessary, obtain anti-theft code beforehand.

CAUTION:

Danger of causing damage to electronic components when disconnecting the battery.

Follow the steps for disconnecting the battery.

Vehicles with 2.0L Gasoline Engine and Turbocharger

Fig 2: Identifying Engine Cover Attachment Points

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-- Remove the engine cover upward from the attaching points -arrows-. Refer to ENGINE COVER, REMOVING AND INSTALLING (CPLA, CPPA, CPKA, CPRA) or ENGINE COVER, REMOVING AND INSTALLING (DDSA, DDSB) .

-- Open the clamp and remove the air guide hose from the air filter. Refer to OVERVIEW - AIR FILTER HOUSING (CPLA, CPPA, CPKA, CPRA) or OVERVIEW - AIR FILTER HOUSING (DDSA, DDSB) .

-- Press the release button to remove the air duct hose -1-.

Fig 3: Identifying Charge Air Pipe Bolt -Arrow- And Hose Clamp -2-

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-- Remove the air duct hose -1- and move it to the side.

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

-- Remove the air duct pipe; to do this, loosen the hose clamp -2-.

-- Remove the intake hose between the intermediate pipe and the turbocharger.

-- Seal the turbocharger with the : VAS6122 .

Vehicles with 1.4L Gasoline Engine, Turbocharger and Compressor:

Fig 4: Identifying Engine Cover And Heat Shield

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-- Remove the engine cover -arrow A- and the heat shield -arrow B-. Refer to ENGINE COVER, REMOVING AND INSTALLING (CPLA, CPPA, CPKA, CPRA) or ENGINE COVER, REMOVING AND INSTALLING (DDSA, DDSB) .

-- Remove the pressure pipe with the regulating flap control unit -2-. Refer to OVERVIEW - INTAKE MANIFOLD (CPLA, CPPA, CPKA, CPRA) or OVERVIEW - INTAKE MANIFOLD (DDSA, DDSB) .

-- Remove the charge air pipe -1-. Refer to [For engine(s) DDSB, DDSA] Charge Air System or [For engine(s) CPPA, CPRA, CPKA, CPLA] Charge Air System .

Continuation for All Vehicles

Fig 5: Identifying Nuts And Heat Shield

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-- If equipped, remove the nut -1- and remove the heat shield -2-.

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

Fig 6: Identifying Direction To Release And Remove Connector From Control Module

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-- Insert the : VAG1869/2 .

Fig 7: Identifying Brake Pedal Depressor V.A.G 1869/2

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-- Remove front left caps -1-.

Fig 8: Identifying Bleeder Screw Cap

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-- Remove rear left caps -1-.

Fig 9: Identifying Bleeder Screw Cap (Rear)

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Use a suitable bleeder hose

It must fit tightly on the bleeder valve so that no air can get into the brake system

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

Fig 10: Identifying Bleed Valve

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-- Open the breather valve.

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

Fig 11: Identifying Bleed Valve

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-- Open the breather valve.

-- Push the brake pedal at least 60 mm using the : VAG1869/2 .

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

Do not remove the : VAG1869/2 .

-- Place enough lint-free cloths under the ABS Control Module -J104- and the ABS Hydraulic Unit -N55-.

Make Sure No Brake Fluid Gets on the Contacts

CAUTION:

Do not confuse the brake lines when connecting them to the ABS Hydraulic Unit -N55-. Mark the lines in their installed position before removing them.

-- Mark brake lines -A and B- from brake master cylinder.

Fig 12: Identifying Brake Lines

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

-- Immediately seal the threaded holes with the plugs from the assembly repair kit.

-- Close brake lines immediately using Sealing Plugs or with suitable plugs from the : VAS6122 .

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

-- Immediately seal the threaded holes with the plugs from the assembly repair kit.

-- Close brake lines immediately using Sealing Plugs or with suitable plugs from the : VAS6122 .

-- Remove the ABS Hydraulic Unit -N55- and the ABS Control Module -J104- in direction of -arrow- and pull upward out of the shock absorbers.

Fig 13: Identifying Hydraulic Unit With Control Module Upward Removed Out Of Shock Absorbers

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

-- Remove the bracket in the vehicle from the hydraulic unit -arrows- (only on engines with too little clearance between the cross panel and engine).

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