Volkswagen Golf / Golf GTI / Jetta. Manual — part 916

01-1

On Board
Diagnostic
(OBD)
through
m.y. 2001

Tools

Special tools
and equipment

VAG 1551

Scan Tool
(ST)

`VAG

1551/3B
cable

VAS 5051

Vehicle
Diagnostic
Testing and
Information
System

On Board Diagnostic (OBD) through m.y. 2001

13/2/2005

01-2

VAS 5051 or VAG 1551,
connecting

All functions previously performed
with the VAG 1551 or VAG 1552 can
also be performed using the VAS
5051 tester via operating mode
vehicle self-diagnosis.

Operating instructions for VAS

5051 tester.

VAS 5051, connecting

Test requirements:

All fuses OK according to wiring

diagram.

Battery voltage must be at least

11.5 volts.

Select operating mode, vehicle
system and function:

Display will indicate the control
module identification and the
coding.

Display will indicate all relevant
diagnostic functions.

- Connect VAS 5051/1 or VAS

5051/3 diagnostic wire to Data
Link Connector (DLC)

- Switch on ignition.

- Press "Vehicle Self-Diagnosis"

selection on display.

- Select the vehicle system to be

tested on display (touch screen).

- Select the desired function on

display.

On Board Diagnostic (OBD) through m.y. 2001

13/2/2005

01-3

Notes:

Display fields in functions 04 (Basic setting) and

08 (Read Measuring Value Block) are listed
from top to bottom.

The following test sequences are described for

the VAG 1551 Scan Tool (ST).

VAG 1551, connecting

Test requirements:

All fuses OK according to wiring diagram.

Battery voltage must be at least 11.5 volts.

Notes:

Electrical Wiring Diagrams, Troubleshooting &

Component Locations

- Connect VAG 1551 Scan Tool (ST) with VAG

1551/3B cable to Data Link Connector (DLC).

If nothing is indicated on display, check voltage

supply for VAG 1551 scan tool according to
wiring diagram.

Depending on the program, additional operating

information can be printed out by pressing the
HELP button of the VAG 1551 scan tool.

Function 00 "Automatic test sequence" can be

performed in operating mode 1 "Rapid data
transfer". This automatically checks all control
modules installed in the vehicle.

The

button is used for advancing through

the program sequence.

The PRINT button is used for switching on the

printer (lamp in button lights up).

On Board Diagnostic (OBD) through m.y. 2001

13/2/2005

01-4

VAG- On Board Diagnostic

HELP

1 - Rapid data transfer*

2 - Blink code output*

Indicated on display (* is displayed

alternately):

- Press button 1 for "Rapid data

transfer".

- Continue On Board Diagnostic

(OBD) of vehicle system to be
tested as described under
"performing On Board Diagnostic
(OBD)

table of contents

On Board Diagnostic (OBD) through m.y. 2001

13/2/2005