Abs Control Module -J104- And Abs Hydraulic Unit -N55-, Removing And Installing, Vehicles With A Diesel Engine: Removing

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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.

1. ABS Hydraulic Unit -N55- with ABS Control Module -J104-
2. Brake Booster with Tandem Brake Master Cylinder

-- Read and note the present control module coding. Refer to Vehicle Diagnostic Tester.

-- Disconnect the battery. Refer to BATTERY .

-- Remove the engine cover. Refer to ENGINE COVER (CNLA, CRJA) , ENGINE COVER (CVCA, CUUA, CUUB, DELA, DEBA, DEJA, DGMA) and ENGINE COVER (CPLA, CPPA, CPKA, CPRA) .

-- Remove the noise insulation. Refer to NOISE INSULATION .

-- Remove the subframe. Refer to SUBFRAME .

Vehicles With Emissions Control Module 

-- Remove the emissions control module. Refer to EMISSIONS CONTROL (CPLA, CPPA, CPKA, CPRA) , EMISSIONS CONTROL (CBPA, CKJA) , EMISSIONS CONTROL SYSTEM (CVCA, CUUA, CUUB, DELA, DEBA, DEJA, DGMA) and EMISSIONS CONTROL SYSTEM (CNLA, CRJA) .

All Vehicles 

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

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

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-- Insert the :VAG1869/2  .

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-- Remove front left caps -1-.

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-- Remove rear left caps -1-.

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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.

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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.

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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.

Vehicles With ABS Mark 60 EC ABS/EDS/ASR/ESP 

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

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

-- Seal the threaded hole immediately with plugs from the assembly repair kit.

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

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

-- Seal the threaded hole immediately with plugs from the assembly repair kit.

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

-- 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 bracket.

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

-- Unscrew and remove the bracket -item  ) OVERVIEW - ABS MARK 60 EC (ABS/EDL/ASR/ESP)- from the ABS Hydraulic Unit -N55- inside the engine compartment.

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

Vehicles With ABS Mark 70 ABS/ASR: 

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

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

-- Seal the threaded hole immediately with 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 through 4- and then remove them.

-- Seal the threaded hole immediately with 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.

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

-- Unscrew and remove the bracket -item  ) OVERVIEW - ABS MARK 70 (ABS/ASR)- from the ABS Hydraulic Unit -N55- inside the engine compartment.

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