Abs Control Module And Hydraulic Unit: Installing

NOTE:

Do not remove sealing plugs at new hydraulic unit until the corresponding brake line is about to be installed.

If the sealing plugs are removed too early, brake fluid can escape and unit may not be sufficiently filled or adequately bled.

When installing the hydraulic unit, make sure the damper rubber is not pushed out of the bracket. The damper rubber must lie on the longitudinal member cover plate.

-- Installation is in reverse order of removal.

Fig 1: Fastening sequence of brake lines:

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1 -

ABS Hydraulic Unit -N55- to the left front brake caliper

Identification at ABS Hydraulic Unit -N55- -VL-

2 -

ABS Hydraulic Unit -N55- to the right rear brake caliper

Identification at ABS Hydraulic Unit -N55- -HR-

3 -

ABS Hydraulic Unit -N55- to the left rear brake caliper

Identification at ABS Hydraulic Unit -N55- -HL-

4 -

ABS Hydraulic Unit -N55- to the right front brake caliper

Identification at ABS Hydraulic Unit -N55- -VR-

5 -

ABS Hydraulic Unit -N55- to the master brake cylinder secondary piston circuit

Identification at ABS Hydraulic Unit -N55- -HZ2-

6 -

ABS Hydraulic Unit -N55- to the master brake cylinder primary piston circuit

Identification at ABS Hydraulic Unit -N55- -HZ1-

-- Remove the Brake Pedal ActuatorV.A.G 1869/2.

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

-- Enter radio code.

-- Perform ABS Control Module -J104- coding using the Vehicle Diagnostic Tester in "Guided Fault Finding".

A Steering Angle Sensor -G85-, Transverse Acceleration Sensor -G200-, LLongitudinal Acceleration Sensor -G251- and the Brake Pressure Sensor 1 -G201- basic setting must be done.

Tightening specifications

Component	Tightening specification
Screw for ABS Hydraulic Unit -N55- to bracket	8 Nm
Brake lines to ABS Hydraulic Unit -N55-
Thread M10 x 1	14 Nm
Thread M12 x 1	14 Nm