ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING, LHD VEHICLES: Installing

Courtesy of AUDI OF AMERICA, LLC

Install in the reverse order of removal while noting the following:

-- Push the hydraulic control module -1- with the bracket into the pins in the engine compartment -arrows-.

• The hydraulic control module must rest in all pins.
• When installing the hydraulic control module, make sure the rubber buffer is not pushed out of the bracket.
• Only remove the plugs on the new hydraulic unit if the corresponding brake line is installed.
• If the plugs are removed too early from the hydraulic unit, brake fluid can escape and the unit may not be sufficiently filled or adequately bled.

Identification of the hydraulic unit.

A -

Hydraulic Unit To Master Brake Cylinder Primary Piston Circuit -HZ2-

B -

Hydraulic Unit To Master Cylinder Secondary Piston Circuit -HZ1-

1 -

Hydraulic Unit To Right Front Brake Caliper -VR-

2 -

Hydraulic Unit To Left Rear Brake Caliper -HL-

3 -

Hydraulic Unit To Right Rear Brake Caliper -HR-

4 -

Hydraulic Unit To Left Front Brake Caliper -VL-

-- Insert all brake lines into the ABS Hydraulic Unit -N55-, install all union bolts by hand and tighten in the sequence -1 through 6- to the corresponding tightening specification.

-- After securing the brake lines to the hydraulic unit select the "Hydraulic valve interchange test" program. Refer to DIAGNOSTIC ENTRIES .

-- Follow the instructions in the Vehicle Diagnostic Tester display.

-- Remove the Brake Pedal Actuator:V.A.G 1869/2  .

-- Bleed the brake system. Refer to HYDRAULIC SYSTEM, BLEEDING .

-- Install the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- After replacing the ABS Control Module -J104- /hydraulic control unit complete the "Control Module, Replacing" program. Using the => .