ABS Control Module -J104- AND ABS Hydraulic Unit -N55- WITH 5-CYLINDER GASOLINE ENGINE AND ABS MARK 70 ABS/ASR: Removing

Fig 1: Configuration

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Installed location:

The ABS Control Module -J104- is attached to the Anti-lock Brake System (ABS) Hydraulic Unit -N55- and is located inside the engine compartment on the right side.

1. Anti-lock Brake System (ABS) Hydraulic Unit -N55- with ABS Control Module -J104-
2. Brake booster with tandem brake master cylinder

-- Get the coding from the ABS Control Module -J104- and write it down.

Use the Vehicle Diagnostic Tester.

• Chassis 
• Brake System 
• Anti-lock braking system Anti-lock Brake System (ABS)/EDL/ASR/ESP Mark 60 EC 
• Function 
• Check coding in the Anti-lock Brake System (ABS) control module J104 

-- Open clamp -2- and remove intake hose.

Fig 2: Disconnecting Connector And Intake Hose

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-- If equipped, disconnect the connector -1- and remove.

-- Remove the bolts -3- and the intake hose.

-- Pull the engine with a jerk out of the mounts first at the front -arrow 1-, then at the right rear -arrow 2- and finally at the left rear -arrow 3-.

Fig 3: Identifying Removal Of Engine Cover With Jerk Out Of Mount First

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-- Carefully swivel engine cover out of rear area.

Fig 4: Identifying Nuts And Heat Shield

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-- Remove the nuts -1- and remove the heat shield -2-, if equipped.

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

Fig 5: Identifying Direction To Release And Remove Connector From Control Module

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-- Install the Brake Pedal Actuator VAG1869/2.

Fig 6: Identifying Brake Pedal Depressor V.A.G 1869/2

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-- Remove front left caps -1-.

Fig 7: Identifying Bleeder Screw Cap

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-- Remove rear left caps -1-.

Fig 8: Identifying Vent Screw Cap

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

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

Fig 9: Identifying Bleed Valve

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-- Open the bleed valve.

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

Fig 10: Identifying V.A.G 1869/2

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-- Open the bleed valve.

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

-- Close 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-.

Make sure no brake fluid gets onto contacts.

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

Fig 11: Identifying Brake Lines

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-- Remove the brake lines -A- and -B- from the Anti-lock Brake System (ABS) Hydraulic Unit -N55-.

-- Close the brake lines and threaded holes immediately using Plugs 1H0 698 311 A.

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

-- Remove the Anti-lock Brake System (ABS) Hydraulic Unit -N55- and the ABS Control Module -J104- in direction of -arrow- and pull upward out of the shock absorbers.

Fig 12: Identifying Hydraulic Unit With Control Module Upward Removed Out Of Shock Absorbers

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

-- Remove the bracket. Refer to - 10- from the ABS Hydraulic Unit -N55- inside the engine compartment.

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