Volkswagen Golf / Golf GTI / Jetta. Manual — part 334

01-2

Sporadic (isolated) malfunctions will also be

recognized and stored. But if these malfunctions
do not occur again within the next 50 vehicle
starts and driving off sequences then, with the
exception of "control module inoperative", the
DTC memory will be erased.

After switching on the ignition and/or starting the

engine the ABS warning light -K47- and the
warning light for brake system -K118- light up for
approx. 2 seconds.

During this period a test sequence (self-check) is

run in the control module for the following
functions:

To check if the supply voltage is at least 10.0

Volt

To check control module including the valve

windings

To check the coding of the control module

A static check of the speed sensor (no speed

signal)

If after driving off and exceeding a speed of

approx. 20 km/h (approx. 13 mph) the speed
signal is not OK. The ABS warning light -K47-
will light up again.

ABS ITT Mark 20 IE On Board Diagnostic (OBD)

01-3

V.A.G 1551 Scan Tool or tester VAS 5051

The On Board Diagnostic (OBD) must be

initiated always at the commencement of
troubleshooting. Electrical malfunctions
which influence the braking characteristics
will be stored. They can be checked with the
V.A.G 1551 Scan Tool or with the tester
VAS 5051.

The information displayed is used in

conjunction with a DTC table which has
information on the possible DTC causes for
repair measures.

ABS ITT Mark 20 IE On Board Diagnostic (OBD)

01-4

Identifying characteristics

The brake booster boost is produced
by vacuum pressure.

Distinguishing features:

1 -

10" brake booster

2 -

Hydraulic unit

3 -

Control module, 25-pin (bolted
to hydraulic unit)

Distinguishing features of ABS,

ABS/EDL and ABS/EDL/ASR ITT
Mark 20 IE hydraulic unit

Dimension -A- 100 mm vehicles

with ABS

Dimension -A- 130 mm vehicles

with ABS/EDL

Dimension -A- 130 mm vehicles

with ABS/EDL/ASR

ABS ITT Mark 20 IE On Board Diagnostic (OBD)

01-5

Control module identification

The control module version is displayed

when the V.A.G 1551 Scan Tool or the
tester VAS 5051 is connected and the
control module for brake electronics is
selected

Page 01-23

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1J0 907 379 D / G - ABS

1J0 907 379 E / H - ABS/EDL

1J0 907 379 R / J - ABS/EDL/ASR

Diagnostic Trouble Code (DTC) memory

A non-volatile memory ensures that the

contents of the DTC memory are retained
even without a voltage supply.

Data outputis achieved in operating mode 1

(rapid data transfer).

ABS ITT Mark 20 IE On Board Diagnostic (OBD)