Volkswagen Golf / Golf GTI / Jetta. Manual — part 371

01-160

Access to the OBD is only possible when the

vehicle is stationary and ignition turned on
(or engine running).

Wheel bearings and wheel bearing play are

OK.

When checking the ABS system make sure

that the vehicle electric system is not
affected by electro-magnetic interference,
i.e. the vehicle is kept away from equipment
with a high current draw, e.g. from an electric
welding module.

Safety precautions

WARNING!

You must always secure testing and
measuring equipment on the rear seat.

When vehicle is being driven, a second
technician must operate this equipment.

On Board Diagnostic (OBD), performing

01-161

Scan tool, connecting

All functions which could previously
be performed with V.A.G 1551/1552
can also be performed with the new
tester VAS 5051 in the operating
mode vehicle OBD.

Operating instructions for Vehicle

Diagnosis, Testing and Information
System VAS 5051.

Special tools and equipment

VAS 5051 Vehicle Diagnosis,

Testing and Information System

Diagnostic cable VAS 5051/1 or

VAS 5051/3

The ABS function is switched off

in the control module during the
On Board Diagnostic (OBD).

The Diagnostic Trouble Code

(DTC) memory can be erased
after successfully checking and
repair.

On Board Diagnostic (OBD), performing

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Connecting VAS 5051

Selecting operating mode:

Selecting vehicle system:

The control module identification and
coding are indicated on the display.

Selecting diagnosis function:

All diagnostic functions available are
indicated on the display.

Note:

The following test sequences are for
V.A.G 1551 scan tool.

- Pull cover -1- off in direction of -

arrow-.

- With ignition switched off, connect

tester VAS 5051 to Data Link
Connector using diagnosis cable
VAS 5051/1 or VAS 5051/3.

- Press button on display for

"Vehicle On Board Diagnostic
(OBD)".

- Press button "03 - brake

electronics" on the display.

- Press button on display for

desired function.

- Further measures see repair

procedures.

On Board Diagnostic (OBD), performing

01-163

V.A.G 1551 scan tool,
connecting and selecting
function

Note:

All functions that have so far been
carried out with V.A.G 1551 can now
also be carried out with the tester
VAS 5051.

Special tools and equipment

V.A.G 1551 or V.A.G 1552 scan

tool vehicle system tester.

V.A.G 1551/3 or 1551/3A

adapter cable

On Board Diagnostic (OBD), performing