Volkswagen Golf / Golf GTI / Jetta. Manual — part 401

00-13

Vehicles with rear disc brakes

Item Pr. No.

1KE /

2EG

Brake
caliper

C 41

1

Brake
disc

diameter

in mm

239

(9.41)

Brake
disc,
thickness

mm

9 (.354)

2

Brake
pad,
thickness

mm

16.9

(.665)

including

backing

plate

3

Brake
caliper,
piston

diameter

in mm

41

(1.614)

45-1

Anti-lock brake
system (ABS) and anti-
lock brake system
with electronic
differential lock
(ABS/EDL) ITT Mark 20
IE

General

ABS layout

The ABS or ABS/EDL brake system
is divided diagonally. Brake pedal
pressure is assisted pneumatically
by the vacuum brake booster.

Vehicles with ITT Mark 20 IE ABS do
not have a mechanical brake
pressure regulator. Specially
matched software in the control
module controls the rear axle brake
pressure regulation.

Malfunctions of the ABS or ABS/EDL
systems do not influence the brake
system or the vacuum assistance.
The conventional braking system
remains functional even if the ABS is
not operating.

The hydraulic unit -a- and the control

module part -b- form one
component. Separating the two parts
is only possible when the complete
component has been removed from
the vehicle.

New control modules (replacement
parts) are not coded and must be
coded after installation.

Anti-lock brake system (ABS) and anti-lock brake system with electronic differenti...

45-2

Distinguishing features of ABS
ITT Mark 20 IE and the
ABS/EDL ITT Mark 20 IE

I - ABS - ITT Mark 20 IE

Dimension a = 100 mm (3.9 in.)

II - ABS/EDL - ITT Mark 20 IE

Dimension a = 130 mm (5.1 in.)

Anti-lock brake system (ABS) and anti-lock brake system with electronic differenti...

45-3

Notes for repair work on ABS, ABS/EDL

WARNING!

Brake fluid is poisonous.

Note:

Before working on the ABS system, determine

the cause of the malfunction using On Board
Diagnostic (OBD)

Repair Manual, Brake System On Board

Diagnostic (OBD), Repair Group 01

Before working on the ABS system, disconnect

the battery ground (GND) strap. Obtain the
radio code for vehicles with a coded radio.

Before doing any welding work with an electric

welding unit, disconnect the ABS control
module.

When working with brake fluid, observe the

relevant safety precautions and notes

Page

47-33

.

If the brake hydraulic system had to be opened

during the course of repair, bleed the brake
system after completion of the repair

Page

47-33

.

During the final road test perform at least one

controlled brake test where the brake pedal is
felt to pulsate (ABS operation).

Absolute cleanliness is required when working

on the ABS system. It is not permitted to use
any products which contain mineral oil,
greases, etc.

Anti-lock brake system (ABS) and anti-lock brake system with electronic differenti...