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

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

Fig 1: Configuration

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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.

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

Fig 2: Disconnecting Connector And Intake Hose

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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 fasteners first at the front in direction of -arrows 1-, then at the right rear in direction of -arrows 2- and finally at the left rear in direction of -arrow 3-.

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Carefully swivel engine cover out of rear area.

Fig 4: Identifying Nuts And Heat Shield

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Insert the : VAG1869/2 .

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove front left caps -1-.

Fig 7: Identifying Bleeder Screw Cap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove rear left caps -1-.

Fig 8: Identifying Bleeder Screw Cap (Rear)

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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 9: Identifying Bleed Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the breather valve.

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

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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 11: Identifying Brake Lines

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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: 1H0 698 311 A or with suitable plugs from the : VAS6122 .

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

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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).

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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