Manual Vas5051 310 GB

Vehicle Diagnostic, Testing and Information System
VAS 5051
Operating Manual Order Number 7KE3180-1AE

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Contents
Contents
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1.1 General Notes .......................................................................................... 1-1
1.2 Safety Instructions ................................................................................... 1-1
1.3 Designated Use ........................................................................................ 1-1
1.4 Associated Documents ............................................................................. 1-2
1.5 Area of Application ................................................................................. 1-2
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2.1 Structure ................................................................................................... 2-1
2.1.1 Vehicle Diagnostic, Testing and Information System VAS 5051 ........ 2-1
2.1.2 Tester .................................................................................................... 2-3
2.1.3 Workshop Trolley ................................................................................. 2-9
2.1.4 Measuring Leads ................................................................................. 2-10
2.1.5 Printer ................................................................................................. 2-15
2.2 Mode of Operation ................................................................................. 2-17
2.2.1 VAS 5051 ............................................................................................ 2-17
2.2.2 Tester .................................................................................................. 2-18
2.2.3 Workshop Trolley ............................................................................... 2-18
2.2.4 Measuring Leads ................................................................................. 2-18
2.2.5 Printer ................................................................................................. 2-20
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3.1 Preparation ............................................................................................... 3-1
3.2 Connecting .............................................................................................. 3-5
3.3 Power-up .................................................................................................. 3-7
3.3.1 Tester .................................................................................................... 3-7
3.3.2 Printer ................................................................................................. 3-12
3.4 Switching Off ......................................................................................... 3-12
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4.1 VAS 5051 ................................................................................................. 4-1
4.2 Tester ....................................................................................................... 4-1
4.2.1 Use of the Masks .................................................................................. 4-2
4.2.2 Using the Virtual Keyboard .................................................................. 4-7
4.3 Workshop Trolley .................................................................................. 4-11
4.4 Measuring Leads .................................................................................... 4-13
4.5 Printer .................................................................................................... 4-18
Operating Manual VAS 5051

C79298-A3238-X120-04-19 I
Contents
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5.1 Overview .................................................................................................. 5-1
5.2 Start Vehicle Self-Diagnosis .................................................................... 5-2
5.3 Select Vehicle System ............................................................................. 5-4
5.4 Select Diagnostic Function ...................................................................... 5-6
5.4.1 "Interrogate Fault Memory" Diagnostic Function ................................ 5-7
5.4.2 "Final Control Diagnosis" Diagnostic Function ................................... 5-8
5.4.3 "Erase Fault Memory" Diagnostic Function ......................................... 5-9
5.4.4 End Output ............................................................................................ 5-9
5.4.5 "Read Data Block" Diagnostic Function ............................................ 5-10
5.4.6 "Adaption" Diagnostic Function ......................................................... 5-11
5.4.7 "Update Programming" Function ....................................................... 5-12
5.5 OBDII (US Vehicles) ............................................................................ 5-13
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6.1 Overview .................................................................................................. 6-1
6.2 Starting the Test Instruments ................................................................... 6-2
6.3 Multimeter ............................................................................................... 6-3
6.3.1 Direct and Alternating Voltage Measurement ...................................... 6-5
6.3.2 Direct and Alternating Current Measurement ...................................... 6-7
6.3.3 Direct and Alternating Current Measurement via Current Pick-up ...... 6-8
6.3.4 Resistance Measurement ...................................................................... 6-9
6.3.5 Continuity Test ................................................................................... 6-10
6.3.6 Diode Test ........................................................................................... 6-11
6.3.7 Voltage DSO1 ..................................................................................... 6-12
6.3.8 Calibrate .............................................................................................. 6-13
6.4 Digital Storage Oscilloscope (DSO) ...................................................... 6-14
6.4.1 Channel A, Channel B ........................................................................ 6-16
6.4.2 Trigger Mode ...................................................................................... 6-19
6.4.3 Measuring mode ................................................................................. 6-22
6.4.4 Freeze Frame with Cursor .................................................................. 6-24
6.4.4.1 Freeze Frame with One Cursor Displayed ....................................... 6-24
6.4.4.2 Freeze Frame with Both Cursors Displayed .................................... 6-25
6.4.5 Tips and Information .......................................................................... 6-27
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7.1 Overview .................................................................................................. 7-1
7.2 Start Guided Fault Finding ...................................................................... 7-3
7.3 "Go to" Destination Menu ....................................................................... 7-4
7.4 Vehicle Identification .............................................................................. 7-5
7.5 Connect Tester and Vehicle via Diagnostic Cable .................................. 7-7

II C79298-A3238-X120-04-19
Contents
7.6 Vehicle System Test ................................................................................ 7-8

7.7 Fault Memory Contents ......................................................................... 7-11
7.8 Test Plan ................................................................................................ 7-12
7.9 Function Test ......................................................................................... 7-13
7.9.1 Test Dialogs ........................................................................................ 7-16
7.9.2 Working with the Digital Storage Oscilloscope (DSO) ..................... 7-18
7.9.3 Exit Test Step ...................................................................................... 7-18
7.9.4 Returning to the "Function Test" Mask .............................................. 7-19
7.9.5 Exit Guided Fault Finding .................................................................. 7-19
7.10 Complaint Report ................................................................................. 7-20
7.11 Function/Component Selection ........................................................... 7-25
7.12 Documents ........................................................................................... 7-29
7.13 Interrupt Guided Fault Finding ............................................................ 7-31
7.14 Diagnosis Log ...................................................................................... 7-36
7.15 Function Test Log ................................................................................ 7-36
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8.1 Overview .................................................................................................. 8-1
8.2 Start Application ...................................................................................... 8-1
8.2.1 Multimedia ............................................................................................ 8-2
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9.1 Overview .................................................................................................. 9-1
9.2 Start Administration ................................................................................. 9-2
9.3 Select Function ........................................................................................ 9-3
9.4 Install Update ........................................................................................... 9-4
9.5 Self-test .................................................................................................... 9-4
9.6 Enter Workshop Code/Change Dealership Identifier .............................. 9-7
9.7 Signal Generator ...................................................................................... 9-7
9.8 Date/time .................................................................................................. 9-8
9.9 Expanded Functions ............................................................................... 9-10
9.10 Select Initial Graphic ........................................................................... 9-10
9.11 Contents List ........................................................................................ 9-10
9.12 Print Format ......................................................................................... 9-10
9.13 Installation or update of ESIS .............................................................. 9-11
9.14 Activate telediagnosis .......................................................................... 9-11
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10.1 Overview .............................................................................................. 10-1
10.2 Start Help ............................................................................................. 10-1
10.3 Help Overview ..................................................................................... 10-2

C79298-A3238-X120-04-19 III
Contents
10.4 Help on Topics ..................................................................................... 10-3

10.5 Help on the Selected Button ................................................................ 10-4
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11.1 Classification ....................................................................................... 11-1
11.2 Self-test ................................................................................................ 11-2
11.2.1 Self-test for Computer Hardware ...................................................... 11-2
11.2.2 Self-test of the Test Instrument and the Diagnostic Bus Unit. ......... 11-2
11.3 Symptoms, Causes and Solutions ........................................................ 11-2
11.3.1 Computer .......................................................................................... 11-2
11.3.2 Test Instruments ................................................................................ 11-3
11.3.3 Measuring Leads ............................................................................... 11-4
11.3.4 Printer ............................................................................................. 11-13
11.4 Fault Reports to Customer Service .................................................... 11-15
11.5 Exchanging Components ................................................................... 11-16
11.5.1 Tester .............................................................................................. 11-16
11.5.2 Workshop Trolley ........................................................................... 11-16
11.6 Parts List ............................................................................................ 11-17
11.6.1 Contents .......................................................................................... 11-17
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12.1 Visual Check of the VAS 5051 ........................................................... 12-1
12.2 Tester ................................................................................................... 12-1
12.2.1 Cleaning the Touchscreen ................................................................. 12-2
12.2.2 Forming the Battery .......................................................................... 12-2
12.2.3 Changing the Battery ........................................................................ 12-3
12.2.4 Changing the Air Filter ..................................................................... 12-4
12.2.5 Changing the Fuse for Inline Current Measurement ........................ 12-5
12.3 Workshop Trolley ................................................................................ 12-6
12.4 Measuring Leads .................................................................................. 12-6
12.5 Printer .................................................................................................. 12-6
12.5.1 Changing the Toner Cartridge .......................................................... 12-7
12.5.2 Changing the Drum Unit .................................................................. 12-8
12.5.3 Cleaning the LED Array ................................................................... 12-9
12.5.4 Cleaning the Drum .......................................................................... 12-10
12.5.5 Cleaning the Printing Mechanism .................................................. 12-11
12.5.6 Printer Settings ................................................................................ 12-11
12.6 Calibration ......................................................................................... 12-11
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13.1 Vehicle Diagnostic, Testing and Information System
VAS 5051 with Workshop Trolley ..................................................... 13-1

IV C79298-A3238-X120-04-19
Contents
13.2 Tester ................................................................................................... 13-1

13.2.1 Operating Data .................................................................................. 13-1
13.2.2 Test Instruments ................................................................................ 13-2
13.2.2.1 Multimeter ..................................................................................... 13-3
13.2.2.2 Digital Storage Oscilloscope (DSO) .............................................. 13-5
13.2.2.3 Expansion Inputs ........................................................................... 13-8
13.3 Measuring Leads .................................................................................. 13-8
13.4 Workshop Trolley ................................................................................ 13-8
13.5 Printer .................................................................................................. 13-9
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14.1 Forms for Registration and Fault Reporting ........................................ 14-1
14.2 Service Addresses ................................................................................ 14-2
14.2.1 Assignment of countries to regional support centres ........................ 14-2
14.2.2 Regional support centres ................................................................... 14-4
14.3 OKI Addresses ..................................................................................... 14-6
14.4 KNÜRR Addresses .............................................................................. 14-8
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C79298-A3238-X120-04-19 V
Contents
Appendices:
Appendices to chapter 1 General Information:

"Declaration of Conformity", "Zertificate of Calibration"
Appendix to chapter 3 Startup:

"Workshop Identification in VAS 5051"
Appendix to chapter 11 Troubleshooting:

"Parts List VAS 5051"
Appendix to chapter 12 Care and Maintenance:

"Printer Settings"
Appendix to chapter 13 Technical Data:

"Connector Use, Diagnostic Cable and Diagnostic Adapter"
Appendices to chapter 14 Forms and Addresses:

"Registration certificate for VAS 5051", "Fault Report Fax for VAS 5051"

VI C79298-A3238-X120-04-19
Safety Notices
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The safety notices in this operating manual and on the products themselves, have
the following meanings:
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Means that death, severe injury or damage may result if the prescribed precauti-
ons are not taken.
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Means that minor injury or damage may result if the prescribed precautions are
not taken.
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This is important information about the product or how it is used, or indicates a

part of the documentation requiring particular attention.
Severe injury or damage may result if unqualified persons attempt to work on the
equipment or if the safety notices in this operating manual or on the workshop
trolley, tester or printer are disregarded.
General safety notices are listed below. Additional safety notices are given
throughout the operating manual where they are relevant.

C79298-A3238-X120-04-19 i
Safety Notices
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Read all the safety notices:
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If the power cable or the tester is damaged, you must not use the tester until a
qualified specialist has tested the equipment.
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The power cable and the measuring leads must not be laid over tables, benches
or cabinets. They must not be located near hot objects or rotating parts.
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The length of the power cable must not be extended. Use only the supplied
power cable as far as possible. If you exchange it be sure to read the technical
information in chapter 13.
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If you are not going to use the VAS 5051 for an extended period of time, switch
it off using the on/off switch and disconnect it from the mains power if the bat-
tery is charged. When disconnecting the power plug be careful not to pull on the
cable; hold the plug itself and pull it from the socket.
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The VAS 5051 must not be operated in the vicinity of open fuel containers, due
to the risk of explosion or fire.

ii C79298-A3238-X120-04-19
Safety Notices
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Make sure there is adequate ventilation when you are working on vehicles with
running motors, to prevent the risk of carbon monoxide poisoning.
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Use the VAS 5051 only as described in the operating manual. Use only the spec-
ified measuring leads.
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The tester is a device of safety class 1 and is equipped with a safety tested power
cable. It may only be connected to systems with equipment grounding conduc-
tors (TN systems) and grounding sockets.
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Strap the tester securely onto the back seat during test drives and connect it to
the vehicle by way of the 3 meter diagnostic cable or the 3 meter combo diag-
nostic cable. A second person must sit on the back seat to operate the tester.
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Electric ignition systems carry voltages up to 30 kV. Generally applicable safety

at work regulations must be followed at all times.

C79298-A3238-X120-04-19 iii
Safety Notices
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If you open the equipment without authorization or perform improper repairs,

you may put yourself in serious danger.
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Fluctuations and deviation of the mains voltage beyond the permissible toler-
ance may lead to electronics failures.
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iv C79298-A3238-X120-04-19
General Information
1 General Information
1.1 General Notes
This operating manual contains the necessary information for proper use of the
Vehicle Diagnostic, Testing and Information System VAS 5051, henceforth des-
ignated as "VAS 5051". The manual is intended for technically qualified person-
nel with knowledge in the area of vehicle diagnostics and testing.
Knowledge of and technically flawless implementation of the safety instructions
and warnings contained in this operating manual are essential for safe installa-
tion, use and maintenance of the VAS 5051.
For reasons of clarity, this operating manual does not contain all the details of all
implementations of the operating modes described, and cannot cover every con-
ceivable case relating to installation, use, servicing and maintenance.
Likewise, the contents of the dialog masks shown here may differ slightly from
those displayed on the tester.
1.2 Safety Instructions
Pay attention to the safety instructions for the VAS 5051. They are listed after the
table of contents.
1.3 Designated Use
• The VAS 5051 may be used only on a vehicle.

• The described product was developed, manufactured, tested and documented
in accordance with safety norms. Consequently, if the safety instructions, the
specified commissioning procedure, the rules governing designated use and
the service and maintenance recommendations are followed there is under
normal circumstances no danger that the VAS 5051 will present no risk to
property or to health and safety.

C79298-A3238-X120-04-19 1-1
General Information
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When you remove the tester or printer housing, certain parts of those devices
will become accessible that may be under dangerously high tension.
1.4 Associated Documents
In addition to this operating manual, which is intended for use in the workshop,
the following relevant technical documents also exist in relation to the
VAS 5051:
Unpacking instruction for the VAS 5051 with workshop trolley:
Located on the outside of the packaging. It describes how to unpack the VAS 5051
and how to remove materials used for transportation.
1.5 Area of Application
Fault detection and localization in vehicles with the help of

• guided fault finding,
• vehicle self-diagnosis and
• execution of measurements with a multimeter and Ñoscilloscope1
• call up applications, such as "Multimedia", directly from an inserted CD
The VAS 5051 is characterized by

• varying Ñdiagnostic strategies,
• context-sensitive display of documents,
• print functions,
• workshop-oriented setup with a workshop trolley for the tester, a printer, han-
gers for measuring leads and power distribution,
• battery buffering in case of power outage or change of workplace,
• intuitive operation via Ñtouchscreen and help functions.
Appendices: "Declaration of Conformity", "Zertificate of Calibration"
1. The glossary arrow Ñ refers to an explanation of the marked concept in

chapter 15.

1-2 C79298-A3238-X120-04-19
Appendices to Chapter "General Information"
EC Declaration of Conformity
Siemens AG
Automatisierungstechnik
Prozeßautomatisierung
und -instrumente
Fahrzeugprüftechnik
Siemensallee 84
D-76187 Karlsruhe
The device described in the following,

VAS 5051 C79298-A3238-A11, 200-240 V, 50/60 Hz
manufactured by us,
conforms to the following regulations:
- EMC
EC Directive: "Electromagnetic compatibility" 89/396/EEC
amended by Council Directives 91/263/EEC, 92/31/EEC and 93/68/EEC
- Low voltage
EC Directive: "Electrical resources for use
within specific voltage limits" 73/23/EEC
On behalf of the manufacturer
Siemens Aktiengesellschaft
Karlsruhe, September 15, 1997

(date of creation)
Keller ........................... Dr. Funke ...........................

(Name, title, function, signature (Name, title, function, signature
of the undersigned) of the undersigned)
Section Manager Engineering Management

C79298-A3238-X120-04-19 Page: 1
Appendices to Chapter "General Information"
CERTIFICATE
SIEMENS AG
Automatisierungstechnik (AUT)
Prozeßautomatisierung
und Instrumente (AUT 3)
Fahrzeugprüftechnik (AUT 32)
manufactured and delivered the device
VAS 5051
EU version: C79298-A3238-A11
USA version: C79298-A3238-A12
No calibration is required
in the first three years after delivery
Section Manager AUT 32 QM AUT 32

Page: 2 C79298-A3238-X120-04-19
Structure and Mode of Operation
2 Structure and Mode of Operation
This chapter describes all components of the VAS 5051 for orientation purposes.
2.1 Structure
2.1.1 Vehicle Diagnostic, Testing and Information System VAS 5051
Three versions The complete Vehicle Diagnostic, Testing and Information System VAS 5051
(fig. 2-1), hereafter designated as "VAS 5051", comes in three versions:
• EU version: C79298-A3238-A11
• USA version: C79298-A3238-A12 and
• Special version (Taiwan, ...): A5E00056738
VAS 5051 The VAS 5051 consists of the following components:

components
• Tester (section 2.1.2)
• Workshop trolley (section 2.1.3)
• Measuring leads (section 2.1.4)
• Printer (section 2.1.5)

C79298-A3238-X120-04-19 2-1
10
2
8
3
6
5 4
Fig. 2-1 VAS 5051
Key to fig. 2-1:

1. Hangers for measuring leads (shown on the right: attached current pick-up
and DSO measuring leads)
2. Shockproof handle bar (ram protection bar)
3. Power cable
4. Free wheel
5. Braked wheels
6. Drawer
7. Printer
8. Printer cover
9. IrDA adapter
10. Tester

2-2 C79298-A3238-X120-04-19
2.1.2 Tester
Front The following components are located on the front:

• ÑLED array
• Touchscreen
92/.6:$*(1$*
VAS 5051
Version - GB -/V 06.00,18/06/1998
Vehicle
self-diagnosis
Test Instruments
Guided
fault finding
Applications
Administration
Print Help
Fig. 2-2 Front of tester (with Ñstart mask)

C79298-A3238-X120-04-19 2-3
LED array The three LEDs on the front of the tester show its operating status.
/('
/('
/('
Fig. 2-3 LED array
Table 2-1 Meanings of the LEDs
LED 1, two-color Lights up:

• Green to indicate external power supply from the
mains or the vehicle electrical system (if mains
and on-board system power is applied simultane-
ously, the supply comes from the mains).
• Yellow to indicate internal power supply from the
battery.
• Yellow (flashing) to indicate internal power sup-
ply from the battery when it is almost discharged
• Green/yellow (flashing alternately) to indicate
external power supply from the mains or vehicle
electrical system when the battery has been remo-
ved or is defective.
LED 2, single-color Lights up green when the battery is charging.
LED 3, single-color Lights up red when the air filter is clogged and so the
tester is no longer being cooled sufficiently.
If LED 3 is lit, the tester switches off automatically
after approx. 10 seconds. For actions see
section 12.2.4.

2-4 C79298-A3238-X120-04-19
Left side On the left side there are standard interfaces behind a cover:
1. VGA interface
2. RS232 interface
3. Keyboard interface (PS/2)
4. Two PCMCIA ports
Outside the cover are:

1. Power connection socket
2. Grounding screw
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The grounding screw must not be loosened or removed, otherwise the opera-
tional safety of the tester is no longer guaranteed.
2
3
5
6
Fig. 2-4 Left side of tester

C79298-A3238-X120-04-19 2-5
Right side Located on the right side of the tester are:

1. 3.5 inch diskette drive
2. CD-ROM drive
3. Audio output
4. IrDA printer interface
5. On/Off switch (battery charging cannot be switched off)
Fig. 2-5 Right side of tester
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When the CD drawer is opened, sensitive parts of the reading optics are expo-
sed. Make sure that these do not become dirty or damaged.
When you insert a CD, make sure it engages fully in the center fixing on the ver-
tical CD drawer.
When the CD drive is in operation the tester must not be rotated more than 15°
(from the vertical or horizontal).

2-6 C79298-A3238-X120-04-19
Top The connections for the measuring leads, a fuse and a carrying handle are located
on the top of the tester.
1. DSO1: Connection for DSO measuring lead 1
2. TZ: Connection for trigger pick-up
3. DSO2: Connection for DSO measuring lead 2
4. kV: Connection for kV pick-up
5. U/R/D: Connection for ÑU/R/D measuring lead for voltage and resistance
measurement, diode and continuity check
6. Connections for U/R/D measuring lead (additional leads for probe)
7. 10A: Connection for U/R/D measuring lead for inline current measurement
8. COM: Connection for COM measuring lead
9. Fuse for inline current measurement (not via current pick-up)
10. DIAG: Connection for the various diagnostic cables
11. Carrying handle
12. T/D: Connection for temperature and pressure sensor (future applications)
13. SZ: Connection for current pick-up 50 A or 500 A
1 2 3 4 5 6 7
TZ KV DIAG COM
SZ T/D
F12A
13 12 11 10 9 8
Fig. 2-6 Top of tester
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The symbol : for the U/R/D and 10 A connections signifies that the specified input
level of max. 60 V must not be exceeded (see also chapter 13).
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In case of fault, replace fuse for inline current measurement (fig. 2-6, 9) only
with original part (see parts list, appendix to Chapter "Troubleshooting").

C79298-A3238-X120-04-19 2-7
Back On the back of the tester are:

1. Nameplate
2. Warning notice
3. Cover for air filter compartment
4. Cover for battery compartment
F-Nr. - .....
Fig. 2-7 Back of tester

2-8 C79298-A3238-X120-04-19
2.1.3 Workshop Trolley
The workshop trolley consists of the following components:

1. Side hanger for measuring leads. Additional ones are located on the back of
the workshop trolley (not shown in fig. 2-8).
2. Side member
3. Cable reel
4. Shockproof handle bar
5. Free wheel
6. Base frame
7. Braked wheels
8. Drawer for dust cover, operating manual, small parts and up to 3 CDs; the
printer stands on the drawer
9. Tester mounting
9
2
7 6 5
Fig. 2-8 Workshop trolley

C79298-A3238-X120-04-19 2-9
2.1.4 Measuring Leads
The measuring lead sets consist of diagnostic, testing and accessory testing cable
sets.
Diagnostic The diagnostic cable set contains:

cable set
Cable EU US Special
version version version
Diagnostic cable 5 m, without PS, with ISO 9141 l m l

Diagnostic cable 3 m, with PS, with ISO 9141 l m l
Combo diagnostic cable 5 m, without PS, m l m
without CAN, with ISO 9141/J1850,
Combo diagnostic cable 3 m, with PS, m l m

with J1850/CAN, with ISO 9141/J1850,
Diagnostic adapter for old systems l l l

Diagnostic cable LT, with PS l m l
Scope of supply: l Standard, m Accessory - not included

PS - Power supply cable to operate the tester with the vehicle battery.
Testing The testing cable set contains:

cable set
• U/R/D measuring lead (positive pole)
• COM measuring lead (negative pole)
• Two DSO measuring leads of the same type
• Current pick-up 50 A
Accessory testing The optional accessory testing cable set includes:

cable set
• Current pick-up 500 A
• Trigger pick-up
• kV pick-up
The hangers on the measuring leads are designed to fit the attachments on the
workshop trolley.
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The test probes for the U/R/D measuring lead, the COM measuring lead and the
DSO measuring leads have protective sheaths from which just a small measur-
ing tip protrudes. The sheaths serve as touch guards and can be removed as
needed.

2-10 C79298-A3238-X120-04-19
Diagnostic cable/ The diagnostic cables and combo diagnostic cables are available in a 5 m version
combo diagnostic for use on the workshop trolley and a 3 m version for use in the vehicle. The 5 m
cable versions are installed in the VAS 5051 when shipped; the 3 m versions are sup-
plied in the accompanying pack.
The diagnostic cable consists of an 18-pin plug (marked black), the cable and a
16-pin vehicle diagnostic plug to SAE J1962 standard.
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Only the 3 m versions of both cables have wires to supply the tester from the
vehicle electrical system (vehicle battery).
Fig. 2-9 Diagnostic cable
The combo diagnostic cable has an additional four wires to connect to vehicles
with a bus system based on the SAE J1850 protocol. The 3 m version also allows
for connection to vehicles with a bus system based on the CAN protocol.
Diagnostic adapter The diagnostic adapter consists of two 2-pin flat diagnostic plugs, two cables and
the 16-pin diagnostic jack. It can be used with the 5 m or 3 m diagnostic cables.
Supply to the tester from the vehicle electrical system over the 3 m diagnostic
cable also is provided via the diagnostic adapter.
Fig. 2-10 Diagnostic adapter

C79298-A3238-X120-04-19 2-11
Diagnostic cable LT The diagnostic cable LT supplied in the accompanying pack is 3 m long and con-
sists of an 18-pin plug (marked black), the cable and a 16-pin vehicle diagnostic
plug to SAE J1962 standard.
The diagnostic cable LT permits function-oriented addressing of Daimler-Benz
vehicle systems. The battery voltage can also be monitored with this cable. Ter-
minal 15 is switched through so that "Ignition on" is automatically detected.
1RWH
This cable is equipped with additional wires to supply the tester from the vehicle
electrical system (vehicle battery).
Fig. 2-11 Diagnostic cable LT
U/R/D measuring The U/R/D measuring lead consists of a 3-pin connecting plug, the cable and the
lead and COM test probe with built-in button. The connecting plug is fitted with one 4 mm and
measuring lead two 2 mm banana plugs arranged in a row. The 2 mm banana plugs carry the but-
ton signal.
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Fig. 2-12 U/R/D measuring lead (with protective sheath, not shown)
The COM measuring lead consists of the cable with a 4 mm banana plug and a 4
mm test probe.
Fig. 2-13 COM measuring lead (with protective sheath, not shown)

2-12 C79298-A3238-X120-04-19
DSO measuring The two identical-design DSO measuring leads consist of one 12-pin connector
leads (DSO1 and (marked blue), the cable, the red 4 mm test probe with button and active probe
DSO2) head, and the black 4 mm banana plug.
A blue clip labeled "DSO1" or "DSO2" as appropriate is fitted on the cable lead-
ing to the test probe to distinguish between the cables.
DSO 2 %XWWRQ
Fig. 2-14 DSO measuring lead (with protective sheath, not shown)
Current pick-up 50 A The current pick-up 50 A consists of one 8-pin connector (marked yellow), the
cable and the actual current pick-up.
C 7 m za
Stro
9 2 ng
SIE
98 e
-A 5 0
ME
32 A
N
38
S
-B5
5 -5 2
1
Fig. 2-15 Current pick-up 50 A
Current pick-up The design concept of the current pick-up 500 A is the same as for the pick-up
500 A 50 A.
Trigger pick-up The trigger pick-up consists of a 5-pin connector (marked black), the cable and
the actual trigger pick-up.
Fig. 2-16 Trigger pick-up

C79298-A3238-X120-04-19 2-13
kV pick-up The kV pick-up consists of a 5-pin connector (marked red), the cable and the sen-
sor.
Fig. 2-17 kV pick-up

2-14 C79298-A3238-X120-04-19
2.1.5 Printer
1RWH
Model OL610ex LED page printers and several successor models of largely
identical design are in use. This manual describes only the use of model
OL610ex. For the technical specifications of the individual models refer to
section 13.5.
Front On the front of the printer the following components can be seen:
1. Display panel
2. Key array
3. Paper tray
4. Paper cassette
5. Paper tray extension
6. Release button (one each on the left and right sides of the housing cover)
7. On/Off switch
1 2 3
/PS
1Oeag e Pr int er
OL 6 P MEMNU6e n11u 20e
1
MENUn u 2
Me
OL 1
MENU u 2
1 Men
MENU u 2 1
MENU u 2
Men Men
1
MENU u 2 1
nd s
Men MENU u 2 co
Men s 2 se
R
1
MENU u 2 Pr es
Men
y
Re ad
7
6
5 4
Fig. 2-18 Front view of printer

C79298-A3238-X120-04-19 2-15
Back The following components are located on the back of the printer:
1. Power socket
2. Centronics interface for connection of the IrDA adapter
Fig. 2-19 Back of printer

2-16 C79298-A3238-X120-04-19
IrDA The printer is connected to the tester by way of an infrared (IrDA) adapter.
1. IrDA interface on the tester.
2. IrDA adapter (leading to printer’s Centronics interface) on holder. The
groove around the adapter serves to locate the holder.
Fig. 2-20 IrDA adapter
2.2 Mode of Operation
2.2.1 VAS 5051
You can mobilize the VAS 5051 in your workshop. Connected to a vehicle by
measuring leads and sensors, it electronically supports fault finding and localiza-
tion.
The core component is the tester, which remains part of the VAS 5051 in work-
shop operations but can also be operated separately. You can print results on the
integral printer.

C79298-A3238-X120-04-19 2-17
2.2.2 Tester
The tester offers the operating modes "Vehicle Self-Diagnosis", "Test Instru-
ments" and "Guided Fault Finding". This allows it to be used as a fault reader, as
a test instrument and as an intelligent fault identification system.
The operating system and applications are stored in the tester. It can be operated
with 120 to 230 V AC or from the vehicle electrical system. A built-in battery
delivers up to 30 minutes of constant power when needed, so the tester does not
have to be switched off when it is moved.
The tester reacts to inputs made by pressing your finger (or any other blunt object)
directly on the touchscreen. An IrDA interface provides a wireless link to the prin-
ter.
The workshop trolley is a mobile unit with mountings for the tester, the measur-
ing leads and a printer. It has a separate mains power inlet as well as a power dis-
tribution system with permanently fitted cables for connection of the tester and
the printer.
With the workshop trolley the VAS 5051 can be moved around the workshop. Dis-
plays and controls can be adjusted ergonomically for the user. It also provides
storage space for accessories.
The measuring leads and sensors form the test interface between VAS 5051 and
the vehicle. They acquire the signals coming from the test object and route them
to the VAS 5051 for processing.
U/R/D measuring The two measuring leads are used for the floating multimeter. Both leads always
lead and COM must be adapted. The button built into the test probe of the U/R/D measuring lead
measuring lead controls the measurement. Depending on the selected software function, you can
start or end the measurement (freeze frame) or execute special functions.

2-18 C79298-A3238-X120-04-19
DSO measuring The two identical-design DSO1 and DSO2 measuring leads are used for the two-
leads (DSO1 and channel digital storage oscilloscope. Both measurement connections must always
DSO2) be adapted for each measuring lead used for measurement. The button in the red
positive test probe controls measured value acquisition. Depending on the
selected software function, you can start or end the measurement (freeze frame)
or execute special functions.
The DSO1 lead can also be used for voltage measurements to ± 400 V (see fig. 6-
2).
Current pick-up 50 A The current pick-up can be opened so that it can be clamped around the cable
and 500 A whose current is to be measured. You can adapt cables up to 12 mm (current pick-
up 50 A) and 28 mm (current pick-up 500 A) in diameter. The accuracy is heavily
dependent on gapless closure of the two prongs of the pick-up. To avoid measure-
ment error, such as from dirt contamination of the core surfaces, the current pick-
ups 50 A and 500 A each have a closure control mechanism. This signals to the
software that the pick-up is closed and a measurement can be taken.
Trigger pick-up The trigger pick-up can be opened and clamped around the ignition cable used for
triggering. You can adapt ignition cables up to 11 mm in diameter. The trigger
pick-up picks up the start pulse as from which the signal characteristic is to be
displayed on the oscilloscope. For example, clamp the trigger pick-up to ignition
cable 1 when you want to display a signal as from the firing point of the first cyl-
inder.
kV pick-up The kV pick-up records the ignition voltage amplitude and the ignition voltage
characteristic in the ignition system. It can be opened so that it can be clamped to
an ignition cable on the vehicle. There it works as a capacitive voltage divider.
You can adapt ignition cables of between 5 and 9 mm in diameter.
Diagnostic cable/ The diagnostic cables and combo diagnostic cables are used to connect the tester
combo diagnostic to a vehicle. This gives you access to the installed vehicle systems, to the battery
cable voltage monitor on terminal 30, to the ignition status detector on terminal 15 (if
fitted), to activation of external devices with the FK-L wire, and to the power
supply from the vehicle electrical system.
Diagnostic adapter The diagnostic adapter enables connection of vehicles with a 2x2-pin diagnostic
connection to the diagnostic cable or the combo diagnostic cable.
Diagnostic cable LT The diagnostic cable LT allows for connection to a light truck.

C79298-A3238-X120-04-19 2-19
2.2.5 Printer
The LED printer is used to print screen masks, test results, etc. It uses DIN A4
paper in the European version and US letter paper in the US version.
LED array The LED array exposes the points on the image drum at which toner is to be
absorbed.
Image drum unit The image drum unit (see fig. 2-21) contains the light-sensitive image drum (1), a
heated roller coated with an organic semiconductor and the toner cassette (2). An
image of the page to be printed is transferred to the heated roller via the LED
array. The exposed areas absorb the toner, which is transferred to the paper and
fixed there by heat.
1 2
Fig. 2-21 Image drum unit

2-20 C79298-A3238-X120-04-19
Display panel The printer display panel shows messages such as the ready status ("ON-LINE"),
low toner, load paper, and paper out (see fig. 2-22).
OKI OL 610e
Personal Page Printer
A4 B5 A5 LTR OTHER ENV
Fig. 2-22 Display panel
The yellow LED ("Ready") next to the display panel indicates the status of the
printer. When it lights up, the printer is ready to receive data and to prepare the
data for printing. The LED flashes while the data is being received and during
printing. The light goes out when the printer is not ready to receive data, such as
during manual paper feed or when an error occurs.
IrDA adapter Communication with the tester is effected by way of the IrDA adapter. As long as
no print job has been delivered, the LED of the IrDA adapter flashes briefly every
three seconds. When a print job is being processed, the LED must "flicker" in
rhythm with the data transfer.

C79298-A3238-X120-04-19 2-21

2-22 C79298-A3238-X120-04-19
Startup
3 Startup
This chapter describes how to set up the VAS 5051 ready for starting in just a few
minutes.
3.1 Preparation
Protective sheeting Remove the protective sheeting from both sides of the printer cover.
for the printer cover
Check the connec- Connections may have become loose in transit. Check the connections in the fol-
tions lowing order:
1. Power connection - workshop trolley, printer and Centronics interface:
Pull the printer cover slightly forward. Check the power connections on the
mains filter and the printer in the now freely accessible printer compartment
(fig. 3-5).
Check the Centronics port on the printer at the same time, and make sure its
retaining clips are locked in above the IrDA adapter’s connector mounting.
Replace the printer cover in its original position.
2. Tester power connection: Check the power connection on the tester.
3. Make certain all measuring lead connections are secure.
4. Check that the IrDA adapter is firmly fitted.
Insert toner When the VAS 5051 is shipped, the printer is connected to the workshop trolley
cartridge and preset to its default settings. However, for shipping the toner is packed sepa-
rately. You must insert the toner into the printer before it can be used.
Install the toner cartridge as follows:
1. Press the release buttons on either side of the printer cover (see fig. 2-18) and
open it upward.
2. Remove the packaging from the new cartridge. Sealing tape on the underside
of the cartridge prevents toner from running out. Remove the entire length of
the tape.

C79298-A3238-X120-04-19 3-1
Startup
3. With the opening facing down, insert the toner cartridge into the left side of
the cartridge tray in the drum unit. The blue handle on the toner cartridge
must be on the right side. Press it into the tray until it lies flat in the printer.
4. Using a little bit of force, move the blue handle all the way back to lock the
toner cartridge in the printer.
Loading paper 7KHSDSHUFDVVHWWHZLWKDFDSDFLW\RIJP2 VKHHWVLVORFDWHGLQWKHERWWRP

RIWKHSULQWHU
1. Press the curved handle on the cassette inwards slightly. The cassette is un-
locked. Remove the cassette completely from the housing
(see fig. 3-1).
2. Place the paper in the cassette. Notice the PAPER FULL marking on the sides
(see fig. 3-2) and do not insert more paper than indicated by the marking.
3. Set the side and back paper feed so that there is about a half millimeter space.
Tip the back feed slightly forward to move it.
4. Insert the paper bin into the printer until it locks.
0e
60
L
O
Ebene 1
R
Fig. 3-1 Printer; press paper cassette to release

3-2 C79298-A3238-X120-04-19
Startup
Fig. 3-2 Side (above) and back (below) paper feed
Extending the paper You can increase the size of the paper tray by extending the front. A metal frame
tray piece can be opened out (see fig. 3-3).
Fig. 3-3 Extending the paper tray

C79298-A3238-X120-04-19 3-3
Startup
Adjusting the tester The swivel mechanism for the tester mounting is locked in place for transporta-
mounting tion. Use an 8 mm Alan wrench to set both sides so that the tester’s inclination
can change but it remains stable in every position.
1 2
1 Tester
2 Tester mounting
3 8 mm Alan wrench
Fig. 3-4 Sketch: swivel mechanism for tester mounting (right side)

3-4 C79298-A3238-X120-04-19
Startup
3.2 Connecting
Connecting Connect the VAS 5051 to the mains power by the 6 meter power cable on the
the power workshop trolley. The top, two-color LED on the front of the tester begins to
glow green; the tester’s integral cooling fan begins to run audibly.
4 a 4
4 b 1 a 1
3
4
5
2
1 Power cable workshop trolley

7
1a Appliance plug
2 Cable housing
3 Printer cover
4 Mains filter
4a Power cable printer
4b Power cable tester
5 Output cable cover
6 Rubber cable holder
7 Tension release
Fig. 3-5 Power cable connection

C79298-A3238-X120-04-19 3-5
Startup
:DUQLQJ
The European version comes as standard with a German power plug. If you are
unable to plug in the power plug in your country, you can exchange it for a local
design conforming to the standard for use in grounded power supply systems
(TN systems to VDE 8085, EN 60950, IEC 950, UL 1950, CSA 22.2 No. 950).
In the USA and Canada, please use a UL or CSA approved power cable.
Operation on ungrounded systems or impedance grounded systems (IT net-
works) is not permitted.
To exchange the power cable:

1. Remove parts (5) through (7).
2. Pull the printer cover (3) forward slightly.
3. Withdraw the appliance plug (1a) from the mains filter (4) and detach the po-
wer cable (1) from the workshop trolley.
4. Insert the new power cable in reverse order.

3-6 C79298-A3238-X120-04-19
Startup
3.3 Power-up
3.3.1 Tester
On/Off switch Switch the tester on by moving the black on/off switch on the right side of the
tester to the "I" position (see fig. 3-6).
92/.6:$*(1$*
Fig. 3-6 Position of the on/off switch on the tester (arrow)
ÑRun-up When you operate the on/off switch, the tester begins to "run up". The software
system is loaded from the hard drive to the main memory. Various messages
appear during run-up, such as driver messages of the operating system and start
messages for various system programs. These messages are not relevant to work-
shop operations.
User-friendly opera- Apart from the on/off switch, the tester is operated by way of a touchscreen. Dia-
tion by touchscreen log boxes with information, selection lists, pictures and labeled buttons for func-
tions and actions appear on the screen.
For additional information on how to operate the tester, see chapter 4.

C79298-A3238-X120-04-19 3-7
Startup
Start mask Once the run-up is completed, the following mask appears for example display-
(initial startup) ing the current software version.
VAS 5051
Version - GB - / V01.00 24/12/1999
Administration
Print Help
Fig. 3-7 Start mask after initial startup (example without Ñmarque separation)
Enter workshop The tester must be assigned your workshop code before it can be operated in you
code (initial startup) workshop. Press the "Administration" button (fig. 3-7). The following mask
appears. It contains a list of all functions that can be accessed in "Administration"
mode.
Administration Equipment number: 12345

Administration
Select function
Install update
Self-test
Enter workshop code
Signal generator
Date/time
Expanded functions
Select initial graphic
Contents list
Print format
Installation or update of ESIS
Activate Telediagnosis
Go to Print Help
Fig. 3-8 "Administration" mask, selecting a function

3-8 C79298-A3238-X120-04-19
Startup
When you select the "Enter Workshop Code" function, you can enter your VZ/
importer number, your dealership number and your dealership identifier (see also
the appendix at the end of this chapter).
When the function has been selected with the selection bar a numeric keyboard
appears on screen for you to enter the "VZ/Importer Number" and the "Dealer-
ship Number" and an alphanumeric keyboard for the "Dealership Identifier" (see
fig. 3-9). Enter the data in the order shown in table 3-1.
To learn how to operate the virtual keyboards, see section 4.2.2.
1RWH
When you have entered the dealership number you are prompted to confirm the
data entered so far. If you choose "Yes" the data cannot be changed later by the
dealer!
Table 3-1 Workshop code and dealership identifier
Code and identifier Mode of input
VZ-/Importer number Three digits between 0 and 9
Dealership number Five digits between 0 and 9
Dealership identifier Up to two lines each with 60 letters and digits
Change dealership Once you have entered the workshop code, the "Enter Workshop Code" function
identifier is replaced by the "Change Dealership Identifier" function. The workshop code
you entered cannot be changed in this mask. You can only access the dealership
identifier to update it if necessary.
Administration Equipment Number: 00123

Enter workshop code VZ/Importer Number: 123
Dealership Identifier: 12345
Enter dealership identifier
(max. 2 lines of 60 characters each)
abc123
ABC123
1 2 3 4 5 6 7 8 9 0
q w e r t y u i o p
a s d f g h j k l SH
C z x c v b n m Q
Go to Print Help
Fig. 3-9 Entry of the workshop code, the dealership identifier is being entered

C79298-A3238-X120-04-19 3-9
Startup
Back to Choose the "Go to" button and then select the "Exit" option to return to the start
start mask mask.
Once you have entered the workshop code, the tester is ready for use and displays
the following start mask for example:
VAS 5051
Version - GB - / V01.00 24/12/1999
Vehicle
self-diagnosis
Test Instruments
Guided
fault finding
Applications
Administration
Print Help
Fig. 3-10 Start mask (example with marque separation)
Devices with marque separation display the version identifier of the base CD in
the Start mask. It consists of the language ID, version number and version date.
The start mask provides the following options:
• Vehicle self-diagnosis, see chapter 5
• Test instruments, see chapter 6
• Guided fault finding, see chapter 7
• Applications, see chapter 8
• Administration, see chapter 9
• Help, see chapter 10
• Print
You can use the Print function to generate a Ñscreen dump (hardcopy) in all
modes. In "Vehicle self-diagnosis" and "Guided fault finding" modes you can
also print out logs documenting the work carried out and the results of it (see
there for more information).

3-10 C79298-A3238-X120-04-19
Startup
Only devices with To enable guided fault finding on devices with marque separation, you must then
marque separation: install one or more marque-specific CD(s) as follows.
Installation of mar-
que-specific CDs 1. Open the CD drive and insert the marque-specific CD you want to use. Fol-
low the instructions for inserting CDs given in section 2.1.2!
2. Close the CD drive.
3. Choose the "Administration" button.
4. From the mask which then appears choose "Update-Installation"
(fig. 3-8. For more details on this function refer to section 9.4). Confirm the
security prompt which then appears.
5. The contents of the marque-specific CD are installed in the VAS 5051. An
on-screen progress indicator allows you to track the installation routine. As
soon as it is finished, the VAS 5051 quits "Administration" mode and brings
the Start mask back up. The Start mask graphic is a picture of the installed
vehicle marque. In the top right-hand corner of the screen a marque icon in-
dicates which marque-specific CD(s) is/are installed on the VAS 5051.
VAS 5051
Version - GB - / V01.00 24/12/1999
Vehicle
self-diagnosis
Test Instruments
Guided
fault finding
Applications
Administration
Print Help
Fig. 3-11 Start mask after installation of a typical marque-specific CD
6. Remove the CD from the drive.

Install other marque-specific CDs as necessary by repeating steps 1-6.

C79298-A3238-X120-04-19 3-11
Startup
3.3.2 Printer
On/Off switch If the on/off switch on the left side of the printer is off, switch it to ON (see fig. 2-
18). You will see the message "INITIALIZING" in the display field while it is
starting up. Once the printer is ready, the display shows "ON-LINE HP4"; the
yellow LED ("Ready") next to the display panel lights.
The printer can remain on because it switches automatically to standby mode.
1RWH
When a print job is started, standby mode is automatically canceled and the
internal heating element is switched on. When the operating temperature is
reached (after approx. 60 s) printing begins.
At the bottom of the display panel there are markings for six different paper for-
mats. Once the printer has initialized, it displays the format used in the paper tray.
DIN A4 is the standard format used in the European version of the VAS 5051; US
Letter Format is used in the US version.
3.4 Switching Off
Switch off the tester by setting the black On/Off switch (fig. 3-6) on the right-
hand side of the tester to "0". Use the save facility in vehicle self-diagnosis
(section 5.1) or guided fault finding (section 7.13). The switch-off process is
ended when the touchscreen disappears.
Appendix: Workshop identification in the VAS 5051

3-12 C79298-A3238-X120-04-19
Appendix to Chapter "Startup"
Workshop identification in VAS 5051
Three elements are used for worldwide device identification and unique user allocation:
Equipment number XXXXX (00000 - 30000)
VZ/Importer number XXX (000 - 999)
Dealership number XXXXX (00000 - 99999)
The equipment number (identical to the last five digits of the F-Nr. (serial number) on the nameplate) is
saved in the device and cannot be changed by the user.
The VZ/importer number and dealership number must be entered by the user on initial startup (administra-
tion).
VZ/Importer number for users in Volkswagen AG plants
For users in plants, the VZ/importer number is assigned the telephone number (abbreviated dial code from
Wolfsburg).
Plant Short dial code

Wolfsburg 111
Hanover 112
Braunschweig 113
Kassel 114
Emden 115
Ingolstadt Audi AG 116
Salzgitter 117
Mosel VW Saxony 118
Karmann Osnabrück 119
Neckarsulm Audi AG 823
Brussels 412
The cost center is stored without the index as a 5-digit dealership number with a leading zero.
Example: Cost center 1949/2 = Dealership number 01949
Users outside the Group
The VZ/importer and dealership numbers are issued by the Volkswagen AG Workshop Equipment/Test
Instruments department and maintained in a list.

C79298-A3238-X120-04-19 Page: 1
Appendix to Chapter "Startup"

Page: 2 C79298-A3238-X120-04-19
Operation
4 Operation
4.1 VAS 5051
The general operation of the VAS 5051 is described in the following sections
dealing with the individual components: the tester, the workshop trolley, the mea-
suring leads and the printer.
Mode-specific operation is described in the relevant chapters.
4.2 Tester
Touchscreen The entire touch-sensitive surface of the screen is designated as the touchscreen.
The screen senses touch by a human finger or other object, thereby replacing the
conventional function of a mouse or keyboard.
Selecting To Ñselect an element (text or button), you must touch it on the screen. It
changes color to indicate that it has been selected. Text turns white and is high-
lighted by a black selection bar; buttons turn dark gray (see page 4-3). As long as
you are touching the screen, you can change the current selection. When you stop
touching the screen the selected element is activated.
1RWH
The screen reacts to all touching. When using the tester, make sure it cannot be
touched unintentionally by equipment or people.
&DXWLRQ
Do not use any sharp, hot or color-transferring objects to operate the screen.
This will result in damage.

C79298-A3238-X120-04-19 4-1
Operation
4.2.1 Use of the Masks
Guided fault finding VW

Vehicle identification Passat 1997>
4 1997
Select body version Estate
Saloon
Estate Information 5
3
6
Text
Overview Close
2 Test Instruments Vehicle

self-diagnosis
Go to Print Help
9
1
Fig. 4-1 Overview - Masks
1. Mask (screen display)

2. Button on the navigation bar
3. Work window
4. Information window
5. Selection bar
6. Dialog box
7. Scroll bar
8. Pointer
9. Navigation bar
Masks (1) The graphical displays on the screen are called "masks". They display all infor-
mation and control functions.
The tester masks shown all have the same structure: the lower portion contains a
bar with operating elements (the navigation bar), the middle and largest portion
contains the work window in which you make your selection or enter values. The
information window is above the work window.
1RWH
If the tester is not used for several minutes, the Ñscreensaver is activated. As
soon as you touch the screen near the upper edge, the last activated mask is dis-
played.

4-2 C79298-A3238-X120-04-19
Operation
Buttons (2) Each mask contains different buttons. You can select various functions with these
buttons.
You can recognize whether a button is active by its color. If the button is dark-
ened, it has been pressed and activated.
pressed, activated button viewable, active button

You have selected this button. As You can see this button on the screen,
soon as you stop touching the screen, but have not selected it.
the selected command will be exe-
cuted.
Work window (3) The work window is the largest portion of the mask. The display changes
depending on the operating mode.
Information Most masks contain two information windows above the work window.
window (4)
The left one shows the following information:
• 1st line: Name of the operating mode (example: Vehicle Self-Diagnosis, Test
Instruments, Guided Fault Finding, Administration).
• 2nd line: Name of the displayed subfunction within the operating mode (ex-
ample: Vehicle Identification).
• 3rd and 4th line: User instructions (example: Select body version) or status
display (example: Function not available).
The information window on the right shows the terms that you have selected pre-
viously (example: - in the guided fault finding - VW - Passat 1997> 1997 -
Estate). In "Test Instruments" mode error messages are also shown here.
1RWH
The contents of the work window and the information windows shown in this
operating manual are examples only and do not necessarily correspond to the
contents of your tester.

C79298-A3238-X120-04-19 4-3
Operation
Selection bar (5) When you select a line within the work window, your selection is highlighted by
the selection bar. The selection bar is black; the text portion you select turns
white.
In most cases, the next mask is activated as soon as you stop touching the touch-
screen after you have marked a text.
Otherwise, the tester offers you the option of selecting several texts. Select all
text you want, then to move to the next mask choose the "Continue" button (see
table 4-3).
ÑDialog box (6) A dialog box is a small mask within a main mask displaying additional informa-
tion, user options and error messages, in order to execute further steps in the
selected program.
1RWH
As long as a dialog box is open, the buttons in the main mask cannot be selected.
You must first touch a button in the dialog box for it to close.
The following are some of the buttons which may appear in the dialog boxes:
Table 4-1 Dialog box buttons (selection)
Button Meaning
Cancel You cancel an operation and go back to the mask that is still visible in the background. This
function also appears in the Ñpull-up menu "Go to" when you choose the "Go to" button. If you
select "Cancel" there, you go back to the first Ñsub-mask of your operating mode.
Display You can display image or text documents.
Exit You exit an work operation and go back to the system start mask. This function also appears in the
pull-up menu "Go to" when you choose the "Go to" button. If you select "Exit" there, you return to
the start mask.
OK You confirm with "OK" and go to the next mask. The operation is executed.
Pause Work is interrupted for a short time and then resumed.
Close The dialog box is closed.
Overview A selection list is displayed from which you can select the desired text or operation.
Interrupt Work is interrupted for a longer period and your data are saved.
Help appears in a dialog box. For information on using Help see chapter 10.

4-4 C79298-A3238-X120-04-19
Operation
Scroll bar (7) If the complete text cannot be displayed within a dialog box or a mask, a scroll
bar appears on the right-hand edge. It consists of a slide and two arrows. The
length of the slide shows you whether it is a large or small document. The smaller
the slide, the larger the portion of the text that is not displayed. To read the text,
place your finger on the slide and move it up or down. The desired text becomes
visible. You also can scroll by line-by-line. If you tap on the "Down arrow" (
the text moves one line up; if you tap on the "Up arrow " ( )the text moves one
line down.
Pointer (8) The tester pointer takes on various shapes depending on its current function.
Table 4-2 Pointer shapes
Appearance Function Note
The "arrow" is the form of the indi-

cator with which you select
functions or buttons. The arrow is
always located where you place
your finger on the screen. -#
The "hourglass" appears when the While the hourglass is

tester is processing your entries.-# displayed, you can make
no further entries. Wait
until the pointer returns to
the form of an arrow.

C79298-A3238-X120-04-19 4-5
Operation
Navigation bar (9) The navigation bar is in the lower portion of the mask. You can call up help and
service functions with the buttons in this bar. Every click of the button changes
the work window. There are a maximum of seven different buttons on the naviga-
tion bar. The number of buttons depends on the mask and the current status.
Test Instruments Vehicle Go to Print Help

self-diagnosis
Fig. 4-2 Overview of buttons on navigation bar (example)
You can place your finger on the button on the screen for the tester to execute the
desired command.
The buttons on the navigation bar have the following functions when active:
Table 4-3 Functions of the navigation bar
Button Function
With the "Back" button you can cancel an ongoing function or

return to the previous mask. -#
Test Instruments
Switch "Test Instruments" mode.-#
Switch to "Vehicle Self-Diagnosis" mode.-#

Vehicle
self-diagnosis
Switch to "Guided Fault Finding" mode, if you activated "Test

Guided
fault finding Instruments" or "Vehicle Self-Diagnosis" mode from there.-#
This button is used for quick switching between several

Go to
masks or for switching to masks that are permissible but
cannot be selected directly with their own button on the
navigation bar. You also can cancel or exit an ongoing
function.
-#
Select various print functions from a selection list in a pull-up

Print
menu.-#
Access the tester’s help function.-#

Help
Choose the "Continue" button to move the next mask.-#

4-6 C79298-A3238-X120-04-19
Operation
Slide control You can change settings steplessly with the slide control.
Fig. 4-3 Slide control
Touch the light-colored control button and pull it slowly to the right or left
depending on whether you want the value to increase or decrease.
When you touch the slide bar to the left or right of the control, the value increases
or decreases by 1.
4.2.2 Using the Virtual Keyboard
The VAS 5051 tester does not have a conventional keyboard. If text entries are
necessary, a so-called "Ñvirtual keyboard" appears on the touchscreen, which
you can operate via the individual buttons.
1RWH
The tester cannot be operated with an externally connected keyboard. The PS/2
keyboard port (see fig. 2-4) is used only for servicing by the vendors.
The virtual keyboard consists of an input box offering various buttons and a dis-
play box above the input box in which the text you enter is displayed.
The tester has two kinds of keyboard: an Ñalphanumeric keyboard (fig. 4-4 and
fig. 4-5) and a Ñnumeric keyboard (fig. 4-6).

C79298-A3238-X120-04-19 4-7
Operation
Alphanumeric When the alphanumeric keyboard appears on the screen you can enter numbers,
keyboard special characters and letters. You can read the entry in the gray box above the
keyboard.
To enter text or a number sequence, press the desired keys one after the other.
1RWH
A sound will signal if the text or number sequence is too long.
Fig. 4-4 Alphanumeric keyboard (lowercase)
Fig. 4-5 Alphanumeric keyboard (uppercase)

4-8 C79298-A3238-X120-04-19
Operation
Special keys The alphanumeric keyboard has special keys that are recognizable by their lighter
background. They have the following functions.
You can use this button to clear and correct your input. If you choose "C" for
"Clear", the last entered character is deleted. If you use this button repeatedly, the
characters are cleared backwards as long as there are still characters left to clear.
The "Q" button signifies ÑQuit. Use this button to confirm and terminate your
input.
The "SH" (Shift) button corresponds to the Shift key on your keyboard. When
you press the button, the virtual keyboard display switches from uppercase letters
with special characters to lowercase letters with numbers or vice versa (see fig. 4-
4, fig. 4-5). This button appears only in the alphanumeric keyboard.
The button with the label "CR" (Carriage Return) corresponds to the return key
on a normal keyboard. It appears only when you choose "SH" on the alphanu-
meric keyboard. By choosing "CR" you can enter more text on a second line. The
information window at the left shows the possible number of lines.
This button is needed to insert a blank space between words or letters.

C79298-A3238-X120-04-19 4-9
Operation
Numeric keyboard Enter the desired value by touching the numbers. The entered numbers are dis-
played in the gray field above.
Fig. 4-6 Numeric keyboard
Special keys The numeric keyboard contains the special keys "C" and "Q". Their functions
correspond to those on the alphanumeric keyboard.

4-10 C79298-A3238-X120-04-19
Operation
4.3 Workshop Trolley
Mobility The workshop trolley allows for mobile use of the tester in the workshop. It has
four wheels so that it can be easily moved around the work environment.
To fix the workshop trolley in place, the two front wheels have brakes. Use the
brakes in order to avoid movement of the workshop trolley during use.
If you want to move the workshop trolley, release the brakes. You can push or
pull the trolley with its all-round handle bar (ram protection bar), then reset the
brakes.
If you need to move location, you can disconnect the power cord from the tester
while it is still on (the tester temporarily switches to battery backup) and recon-
nect the mains power at the new work location.
To remove the tester from the workshop trolley:
1. Disconnect the power to the workshop trolley (also while still switched on).
2. Unplug the power connection and remove all measuring leads.
3. With one hand raise the retainer, and with the other lift the tester out of its
position.
Re-install the tester in reverse order.
Storage You can place the measuring leads and sensors on both sides of the workshop
trolley on the holders provided. You can roll up longer cables, such as the 5 m
diagnostic cables, on the cable reels on the sides.
During operation you can fold the dust protection cover for the VAS 5051 and
store it in the drawer. The drawer also provides room for the operating manual
and up to 3 CDs.
1RWH
When the VAS 5051 is not in use, the dust protection cover should be always be
placed over the workshop trolley.

C79298-A3238-X120-04-19 4-11
Operation
Tester mounting When shipped, the tester is in its installation position and is held in place by a
spring catch on its top.
You can change the tilt angle of the tester on its mounting by holding onto it at
the top and bottom and swiveling it in the vertical. In this way you can work
ergonomically with the VAS 5051 in varying positions.
Using the tester wit- The tester is designed to be used on the workshop trolley with which it is shipped.
hout the work- If the tester needs be used on test drives, the following points should be noted:
shop trolley
&DXWLRQ
Attach the tester securely on the vehicle’s back seat with a strap and connect it to
the vehicle by the 3 meter diagnostic cable or the 3 meter combo diagnostic
cable. A second person must sit on the back seat to operate the tester.
1RWH
The tester can be powered from the vehicle’s electrical system only via the
3 meter diagnostic cable and the 3 meter combo diagnostic cable.
Direct power con- Place the separate power cable in the power socket of the tester (see fig. 2-4) and
nection of the tester connect it to your workshop power source.

4-12 C79298-A3238-X120-04-19
Operation
4.4 Measuring Leads
&DXWLRQ
When disconnecting, only touch the connector housings. Never pull directly on
the cable as this could lead to damage.
Colored spout
matches color-coded
socket
Red lead point

points forward
Fig. 4-7 Correct handling of a plug on the tester
1RWH
To remove a plug from the tester, pull up the plug’s guard cover to withdraw it from the
socket. The plugs are not threaded, and forceful turning may cause damage (see fig. 4-7).
The plug sheath and the corresponding socket on the tester are marked in the
same color.

C79298-A3238-X120-04-19 4-13
Operation
U/R/D measuring On the tester, connect the COM measuring lead to the socket labeled "COM"
lead and COM (marked in black).
measuring lead
For voltage measurement, plug the 4 mm banana plug of the 3-pin connector of
the U/R/D measuring lead into the red "U/R/D" socket.
Fig. 4-8 Voltage measurement, plug in position "U/R/D"
For current measurement, turn the 3-pin connector through 180 degrees and plug
the 4 mm banana plug into the red "10 A" socket.
Fig. 4-9 Current measurement, plug in position "10 A"
&DXWLRQ
After an inline current measurement, whenever possible refit the connector

immediately to the "U/R/D" position! If it is accidentally still fitted at the
"10 A" position in a subsequent voltage measurement, the internal fuse will be
destroyed (for details on changing the fuse refer to section 12.2.5).

4-14 C79298-A3238-X120-04-19
Operation
DSO measuring On the tester, place the lead on one of the blue-marked sockets labeled "DSO1"
leads (DSO1 and or "DSO2". You also can use the "DSO1" terminal as a second channel for the
DSO2) multimeter.
Fig. 4-10 DSO measuring lead connection to the tester
Current pick-up 50 A Connect the cable to the socket labeled "SZ" (marked yellow).
The test result is dependent on

direction. If the direction arrow
is pointing to the positive pole
the technical current direction
is displayed as the test result.
Fig. 4-11 Connection of current pick-up 50 A
Current pick-up Connect the cable to the socket labeled "SZ" (marked yellow).
500 A

C79298-A3238-X120-04-19 4-15
Operation
Trigger pick-up Connect the cable to the socket labeled "TZ" (marked black).
Fig. 4-12 Connection of trigger pick-up
kV pick-up Connect the cable to the socket labeled "kV" (marked red).
Fig. 4-13 Connection of kV pick-up

4-16 C79298-A3238-X120-04-19
Operation
Diagnostic cable/ Connect the connection plug of the cable to the socket labeled "DIAG" (marked
combo diagnostic black).
cable
Fig. 4-14 Connection of diagnostic cable
Diagnostic adapter Plug the diagnostic cable or combo diagnostic cable plug into the 16-pin diagnos-
tic coupling.
Fig. 4-15 Connection of diagnostic adapter
Diagnostic cable LT Use of the diagnostic cable LT is the same as for the 3 meter and 5 meter diagno-
stic cables.

C79298-A3238-X120-04-19 4-17
Operation
4.5 Printer
Button panel The printer is preset at the factory. Use of the button panel is normally necessary
only after replacing the image drum unit (see section 12.5.2). You can find a list-
ing of factory settings in section 12.5.7.
1RWH
Modify the printer settings only if the defaults have been changed. Otherwise
you may get no printout, or the printout may be faulty.
OKI OL 610e
Personal Page Printer
A4 B5 A5 LTR OTHER ENV
Fig. 4-16 Button panel

4-18 C79298-A3238-X120-04-19
Operation
Inserting paper 7KHSDSHUFDVVHWWHZLWKDFDSDFLW\RIJP2VKHHWVLVORFDWHGLQWKHERWWRP

RIWKHSULQWHU
0e
60
L
O
Ebene 1
R
Fig. 4-17 Releasing the paper cassette
Fig. 4-18 Side (top) and back (bottom) paper feed
1. Press the curved handle on the cassette inwards slightly. The cassette is un-
locked. Remove the cassette completely from the housing (see fig. 4-17).
2. Place the paper in the cassette. Notice the PAPER FULL marking on the sides
(see fig. 4-18) and do not insert more paper than indicated by the marking.

C79298-A3238-X120-04-19 4-19
Operation
3. Set the side and back paper feed so that there is about a half millimeter space.
Tip the back feed slightly forward to move it.
4. Push the paper cassette into the printer until it engages.
Extending the You can increase the size of the paper tray by extending the front. A metal frame
paper tray piece can be opened out (see fig. 4-19).
Fig. 4-19 Extending the paper tray
Switching the printer The printer always is on.

off

4-20 C79298-A3238-X120-04-19
Vehicle Self-Diagnosis
5 Vehicle Self-Diagnosis
5.1 Overview
In the "Vehicle Self-Diagnosis" operating mode you can communicate with the
vehicle systems on the diagnostic bus when the connected diagnostic cable is
connected and the ignition on. You can select the desired vehicle system from
dialog masks. From the masks you can start the possible diagnostic functions for
the vehicle system concerned and, for example, retrieve test results or execute a
final control diagnosis, etc.
To work with vehicle self-diagnosis you need the relevant Workshop Manual.
If you select a vehicle system that is not fitted in the connected vehicle you
receive the following message:
Vehicle system not available.
You also receive a message if you select a diagnostic function that is unknown to
the vehicle system or if the function cannot currently be executed:
Function not recognized or not currently executable.
Switch You can switch to the following operating modes in the vehicle self-diagnosis
masks using the buttons on the navigation bar:
• Test Instruments and
• Guided fault finding (only if you previously switched from guided fault fin-
ding to vehicle self-diagnosis).
Go to An operating mode can be cancelled or terminated with the Go to function.
Print When you select the "Print" button, you can choose various printout options from
a pull-up menu:
• Screen: A screen print that outputs what you see on-screen to the printer.
• Save result: The tester saves the current result in the self-diagnosis log. If the
log already contains data, the first time you execute "Save result" after prin-
ting out the self-diagnosis log a query appears asking whether you want to de-
lete the saved data. Press the "Erase" button to overwrite the old data; press
"Do not erase" to append the new data to the old. The self-diagnosis log is
retained when the tester is switched off, unless it is explicitly erased.
• Self-diagnosis log: This selection is only displayed if results have been saved
beforehand. The tester outputs the saved results to a connected printer.

C79298-A3238-X120-04-19 5-1
5.2 Start Vehicle Self-Diagnosis
The "Vehicle Self-Diagnosis" operating mode is activated from the start mask by
choosing the "Vehicle Self-Diagnosis" button (see fig. 5-1).
VAS 5051
Version - GB - / V01.00 24/12/1999
Vehicle
self-diagnosis
Test Instruments
Guided
fault finding
Applications
Administration
Print Help
Fig. 5-1 Start mask, activating "Vehicle Self-Diagnosis"
When you choose this button in the start mask, the tester offers a list of all known
vehicle systems (see fig. 5-2), whether or not they are fitted in the vehicle being
diagnosed.
Vehicle-self-diagnosis is designed for KW1281, KW2000, OBDII and LT vehi-
cles. KW1281 and KW2000 use largely identical masks. The VAS 5051 automat-
ically detects whether a control unit is working to KW1281 or KW2000.

5-2 C79298-A3238-X120-04-19
5.3 Select Vehicle System
When you select the "Vehicle Self-Diagnosis" button in the start mask (see fig. 5-
1), the following mask appears. It contains a list of all installed vehicle systems
and tester-specific functions.
The vehicle systems list is separated from the functions list by an empty line (see
fig. 5-3). Another empty line separates the functions from the list of LT2 vehicle
systems.
Vehicle self-diagnosis
Select vehicle system
01 - Engine electronics
41 - Diesel pump electronics
02 - Gearbox electronics
12 - Clutch electronics
22 - All-wheel drive electronics
03 - Brake system electronics
14 - Suspension electronics
24 - Traction control system
34 - Self-levelling suspension
15 - Airbag
25 - Immobiliser
35 - Central locking
45 - Interior monitoring
55 - Headlight range control
Test Instruments Go to Print Help
Fig. 5-2 "Select vehicle system" mask, Start of list
You can select any vehicle system or function with the selection bar. As soon as
you select a vehicle system, communication over the diagnostic bus begins. The
process is indicated in the left-side information window by the "Communication
setup" text.
When the communication is set up, the control unit identification is read and dis-
played permanently in the right-side information window (see section 5.4).

C79298-A3238-X120-04-19 5-3
If you move to the end of the list with the scroll bar, you will find additional func-
tions:
• 33 - OBDII (US vehicles)
The OBDII functions are available for communication with vehicle systems
that support the "SAE J1979: 1991-12 E/E Diagnostic Test Modes" standard
and react to the address 33H. A selection of masks for OBDII functions is co-
vered in section 5.5.
• 00- Interrogate fault memory - Vehicle system
The fault memories for all vehicle systems entered in the "Select vehicle sy-
stem" mask are read, where available, and their contents with the number of
stored faults displayed in a subsequent mask.
• Select vehicle system via address word
If the vehicle system you are looking for is not in the selection list, you can
enter the relevant address word by way of a keyboard which appears on-
screen. When you acknowledge the entered address, communication with the
addressed vehicle system is set up.
• LT2 vehicle systems
The vehicle systems of the Light Transporter 2 are offered for selection. In
LT2 vehicle systems only the LT functions or (in US tester versions) the OB-
DII functions are usable.
Select vehicle system
09 - Electronic extras
93 - OBDII
00 - Interrogate fault memory - Entire system
Select vehicle system via address word
01 - LT diesel control
25 - LT immobilizer
81 - LT engine management system
82 - LT ABS
83 - LT tachograph
84 - LT auxiliary heater
87 - LT airbag/belt tensioners
89 - LT dash panel insert
Fig. 5-3 "Select vehicle system" mask, end of list

5-4 C79298-A3238-X120-04-19
5.4 Select Diagnostic Function
The following mask (see fig. 5-4) is displayed if you selected a vehicle system in
the previous mask and the communication via the diagnostic bus was successful.
The mask displays a selection of diagnostic functions (jobs) matching the vehicle
system at the left and the control unit identification read from the vehicle system
at the top right in the header. If a vehicle system comprises several control units,
their identification data are displayed beforehand in a separate mask.
In general, the list of diagnostic functions a specific vehicle system type,
e.g. "01 - Engine electronics", does not change, even if individual ones do not
occur in a particular vehicle system.
Other functions, such as "20 - Read RAM" etc., are only accessible to authorized
personnel with a key CD (see also section 9.9).
Vehicle self-diagnosis 01 - Engine electronics

028906021EG
1.9l R4 EDC 00SG 0819
Select Code 2
diagnostic function Workshop code 5314
02 - Interrogate fault memory
03 - Final control diagnosis
04 - Basic setting
05 - Erase fault memory
15 - Readiness code
06 - End output
07 - Code control unit
08 - Read data block
09 - Read individual measured value
10 - Adaption
11 - Login procedure
Update programming
Fig. 5-4 Select diagnostic function
1RWH
Selected examples for the diagnostic functions are described further on in the
text.

C79298-A3238-X120-04-19 5-5
Diagnostic function If you select a function that is not available in the selected vehicle system, the
not available tester responds by delivering the following message in the left-side information
window:
Function not recognized or not currently executable.
Diagnostic bus If you receive a fault signal indicating Diagnostic bus faulty instead of the mask
faulty shown above, the diagnostic cable could be faulty, the ignition could be off or the
battery voltage could be low. Remedy the cause and repeat the function.
End Communication Communication with the vehicle system continues until you select the diagnostic
function "End output" in the "Select diagnostic function" mask or click the "Back"
button.
5.4.1 "Interrogate Fault Memory" Diagnostic Function
When you select "02 - Interrogate fault memory" in the "Select diagnostic func-
tion" mask (see fig. 5-4), the number of faults and the contents of the fault mem-
ory are read from the displayed vehicle system. The fault number is displayed on-
screen in plain text.

Interrogate fault memory 028906021EG
1.9l R4 EDC 00SG 0819
1 fault(s) detected Code 2
Workshop code 5314
00542
Needle lift sender - G80
Open circuit/short to positive
Fig. 5-5 "Interrogate fault memory" mask

5-6 C79298-A3238-X120-04-19
The number of faults found in the memory is shown in the left-side information
window. All saved items of fault information are displayed in the work window.
The information consists of a five-part fault ID number and the associated text. If
the fault occurs Ñsporadically, this will be indicated on an extra line.
If the memory contains more faults than the screen can display, the tester offers a
scroll bar at the far right side with which you can move the list up or down.
For KW2000 you can click on the "Continue" button to view the ambient conditi-
ons under which the fault occurred.
5.4.2 "Final Control Diagnosis" Diagnostic Function
When you select the "03 - Final control diagnosis" function in the "Select diag-
nostic function" mask (see fig. 5-4), the tester activates the initial final control
element. In the lower left-side information window, the note "1st final control
being tested" appears.
In some cases, the process can be observed visually (e.g. indicator lamps) or
acoustically (e.g. relays).
Switching from vehicle self-diagnosis into the test instruments allows you to
monitor the activated final control element and its results with the multimeter or
oscilloscope, for example.

Final control diagnosis 028906021EG
1.9l R4 EDC 00SG 0819
4. final control being tested Code 2
Workshop code 5314
Commencement of injection valve - N108
Exhaust gas recirculation valve - N18
Air conditioner compressor intervention
Fuel shut-off valve - N109
Engine speed (Idling speed) 860 /min

Engine control unit voltage supply 12.23 V
Coolant temperature 92 °C
Intake air temperature 22.4 °C
Fig. 5-6 "Final control diagnosis" mask
You can call up and display the next final control element by choosing the "Con-
tinue" button. Final control diagnosis is canceled with the "Back" button.
In certain cases, when processing the final control diagnosis certain actions are re-
quired in the vehicle or on final control elements. You can find further information
about this in the Workshop Manual.

C79298-A3238-X120-04-19 5-7
5.4.3 "Erase Fault Memory" Diagnostic Function
The "05 - Erase fault memory" job deletes the fault memories of the selected
vehicle system. When you call up the function, the tester shows a dialog box with
the following prompt:
Execute function?
Note: Data will be deleted.
Press the "Cancel" button if you mistakenly activated the function or the "OK"
button to irretrievably delete the data.
The job is confirmed in the left-side information window:
Fault memory erased
1RWH
You can erase the fault memory only if you previously read it via the "Interro-
gate fault memory" function (see section 5.4.1). This prevents important infor-
mation on faults being lost.
The "Erase fault memory" function automatically follows the "Interrogate fault
memory" function. This means that if the fault has not been rectified in the vehi-
cle, causing the fault code still to be detected and stored in the vehicle system, the
contents of the fault memory are again displayed by the tester. The left-side infor-
mation window then shows:
Fault memory erased
1 fault(s) detected
The fault information is additionally displayed in the workspace.
5.4.4 End Output
When you want to exit vehicle self-diagnosis for the selected vehicle system,
select the "06 - End output" function in the "Select diagnostic function" mask
(see fig. 5-4) or choose the "Back" button.
The program returns to the "Select vehicle system" mask. There you can terminate
"Vehicle Self-Diagnosis" mode by selecting "Exit" from the menu and you will re-
turn to the start mask.

5-8 C79298-A3238-X120-04-19
5.4.5 "Read Data Block" Diagnostic Function
When you select "08 - Read data block" in the "Select diagnostic function" mask
(see fig. 5-4), you can read and cyclically display a data block from the vehicle
system. Enter the desired display group ("Display group No." in the Workshop
Manual) to get the relevant measured values.

08 - Read data block 028906021EG
1.9l R4 EDC 00SG 0819
Code 2
Workshop code 5314
Read data block
Read data block
Engine speed (idling speed)
860 /min
Engine charge
1.08 ms
Throttle valve angle
1.520 ° Display
Ignition angle
8.3 ° BTDC group
Basic setting 1
Engine speed (idling speed)
860 /min
Engine charge
1.08 ms
Throttle valve angle
1.520 °
Ignition angle
8.3 ° BTDC Basic setting
Fig. 5-7 -#"Read data block" mask
The default display is of the display groups from 1 upward with measured values
#1 to #4 (display fields 1 to 4, if available), including their meanings and (with
KW2000) physical units. You can change the number of the display group with
the "Up arrow" or "Down arrow" buttons.
When you choose the "Basic setting" button in the mask displayed in
fig. 5-7, the values for the basic setting belonging to measured values #1 to #4 are
shown.

C79298-A3238-X120-04-19 5-9
5.4.6 "Adaption" Diagnostic Function
When you want to check the behavior of the vehicle system described in the
Workshop Manual, you can read, test and save Ñadaption values in the
"10 - Adaption" diagnostic function.
First select the channel number on the on-screen numeric keyboard. The tester
reads and displays the current adaption value. Whether the tester shows test val-
ues in the work window depends on the vehicle system and the selected channel
number.
1RWH
For especially critical adaption values, you must send an ID number to the con-
trol unit via the "Login procedure" function for the control unit to enable the
coding. Use the on-screen numeric keyboard for this.
You can change adaption values using a virtual keyboard (choose the "Keyboard"
button) or with the slide control. If you push the slide control all the way to the
right, the pre-set value range doubles, e.g. from 8 to 16, etc.

10 - Adaption 028906021EG
1.9l R4 EDC 00SG 0819
Channel 3 Code 2
read and test Workshop code 5314
Engine speed (Idling speed) 860 /min

Engine control unit voltage supply 12.23 V
Coolant temperature 92 °C
Intake air temperature 22.4 °C
Save
Fig. 5-8 "Adaption" mask

5-10 C79298-A3238-X120-04-19
Choose the "Save" button when the correct adaption value is found. The tester
initially shows the old and new adaption values; the new value is saved in the
vehicle system only when you choose the "Accept" button.
Erase learnt values By selecting the channel number "0", you can erase all learned values saved in
the vehicle system. The tester responds in the left-side information field with the
query:
Channel 0
Erase learnt values?
Choose the "Continue" button to erase the saved values or the "Back" button to
cancel the function and return to the "Select diagnostic function" (fig. 5-4) mask.
When the values have been deleted the tester confirms the fact in the left-side in-
formation window.
5.4.7 "Update Programming" Function
With the "Update programming" diagnostic function (fig. 5-4) you can update the
vehicle system’s program status with the VAS 5051.
Select diagnostic This diagnostic function option appears only if update programming can be per-
function formed with this vehicle system and there is a more up-to-date version of the pro-
gram in the tester. When you have successfully completed update programming
for a vehicle system, the diagnostic function for it is no longer offered.
You can start the diagnostic function by choosing "Update programming". If the
necessary conditions are not met in the vehicle system, a warning appears. Estab-
lish the necessary conditions indicated and restart update programming.
The process is dialog-guided, across several different masks:
• An information text showing the new version number appears. Follow the
prompt it gives.
• The new update program is loaded into the vehicle system. This operation
takes several minutes. Its progress is shown continuously by a progress bar;
on completion the programming log information appears on-screen.
• Switch the ignition off and back on again.
• The fault memories of all vehicle systems are erased.
If a fault occurs in the process, the vehicle system is no longer ready for service.
The fault is displayed, and the diagnostic functions selection
(fig. 5-4) shows only the "Update programming" function. Repeat update pro-
gramming.

C79298-A3238-X120-04-19 5-11
Self-diagnosis log During the operation you can record the results in the self-diagnosis log. Of spe-
cial interest is the programming log information showing the vehicle version
before and after update programming and the programming status.
Help Once you have selected the diagnostic function you can get more assistance by
choosing the "Help" function.
5.5 OBDII (US Vehicles)
When you select "OBDII" in the "Select vehicle system" mask (see
fig. 5-3), the following mask appears. You can choose between the OBDII oper-
ating modes 1 to 7.
In the OBDII masks, all vehicle systems that support the OBDII standard are dis-
played at once in the right-side information window. Distinctions are made by
different character colors, relating to the designation of the vehicle system, jobs
and results.
OBDII
Select
diagnosis mode
Mode 1: Obtain data
Mode 2: Obtain operating conditions
Mode 3: Interrogate fault memory
Mode 4: Reset/erase diagnosis data
Mode 5: Obtain lambda test results
Mode 6: Obtain test results on not continuously monitored components
Mode 7: Obtain test results on continuously monitored components
Mode 8: Tank leak test
Test Instruments Guided Go to Print Help

fault finding
Fig. 5-9 OBDII, "Select diagnosis mode" mask
• Diagnosis mode 1: Obtain data: You have the option to obtain information
such as analog inputs and outputs, binary inputs and outputs as well as system
status information.
• Diagnosis mode 2: Obtain operating conditions: During the first occurrence
of malfunctions in a subsystem, the current conditions in the vehicle system
must be saved in addition to the fault registration. You can read these condi-
tions and make a decision regarding further procedures for repair.

5-12 C79298-A3238-X120-04-19
• Diagnosis mode 3: Interrogate fault memory: You can read and display all sa-
ved fault codes for all vehicle systems.
• Diagnosis mode 4: Reset/erase diagnosis data: You can erase or delete emis-
sions-related information in the vehicle system. Erasing refers to:
- erasing the number of fault codes
- erasing the fault codes
- erasing the fault codes for "Freeze Frame Data"
- erasing "Lambda probe monitoring values"
- resetting the monitoring status
- manufacturer-specific information
Data can be erased only if the fault memory was read previously (diagnosis
mode 3).
• Diagnosis mode 5: Obtain Lambda test results
You can display the results of the vehicle-specific Lambda probe monitoring.
• Diagnosis mode 6: Obtain test results on not continuously monitored com-
ponents: You can display the test results of components not monitored conti-
nuously.
• Diagnosis mode 7: Obtain test results on continuously monitored compon-
ents: You can display test results of continuously monitored components.
Example of mask sequence, mode 1: Obtain data:
OBDII Mode 1 Engine electronics
Select Gearbox electronics
data
PID 01:
PID 03: Fuel system status
PID 04: Calculated load value
PID 05: Engine coolant temperature
PID 06: Short term fuel trim - Bank 1
PID 07: Long term fuel trim - Bank 1
PID 12: Engine RPM
PID 13: Vehicle speed
PID 14: Ignition timing advance for #1 cylinder
PID 15: Intake air temperature
PID 16: Air flow rate from MAF sensor
PID 17: Absolute throttle position
PID 18: Command secondary air status
PID 19: Location of oxygen Bank 1 to Bank 2 - Sonde 1 to Sonde 4 (p

fault finding
Fig. 5-10 OBDII, "Select data" mask
In the mask shown above, you can select data that you would like to read from
the vehicle system.

C79298-A3238-X120-04-19 5-13
The following mask (see fig. 5-11) shows the results; the link between measure-
ment results and vehicle systems is made with colored characters.
OBDII Mode 1 Engine electronics
Display Gearbox electronics
data
PID 03: Fuel system status
Fuel system 1 status
- Open loop - has not yet satisfied conditions to go closed loop
Fuel system 2 status
- Not used
PID 05: Engine coolant temperature -40 C
PID 05: Engine coolant temperature 0 C
PID 07: Long term fuel trim - Bank 1 0.00%

fault finding
Fig. 5-11 OBDII, "Display data" mask

5-14 C79298-A3238-X120-04-19
Test Instruments
6 Test Instruments
6.1 Overview
The "Test Instruments" mode allows you to set the testing unit with the help of
parameter masks and then use the unit to perform tests. Test results are displayed
on-screen numerically or graphically.
The following functions are available in "Test Instruments" mode:
• Multimeter
• DSO
In addition, you can also use the buttons on the navigation bar to switch to the
• Vehicle self-diagnosis and
• Guided fault finding
modes. You can only do this if you began your diagnostic session in one of these
modes.
&DXWLRQ
Use the test instruments only on vehicles and vehicle components.
Print measured By pressing on the "Print" button then selecting "Screen", you can print a copy of
values the screen and so get a printout of the measured values. Before starting the print,
press the "Freeze frame" button to freeze the cyclically displayed measured val-
ues.

C79298-A3238-X120-04-19 6-1
Test Instruments
6.2 Starting the Test Instruments
The test instruments are accessed from the start mask by pressing the "Test
Instruments" button.
VAS 5051
Version - GB - / V01.00 24/12/1999
Vehicle
self-diagnosis
Test Instruments
Test Instruments
Guided
fault finding
Applications
Administration
Print Help
Fig. 6-1 "System start" mask, "Test Instruments" selected
The "Multimeter" mask always appears when it is started.
Free use The test instruments can be used without pre-identification of the vehicle, either
by way of the start mask (see above) or by pressing the "Test Instruments" button
in "Guided Fault Finding" or "Vehicle Self-Diagnosis" mode.
When you start the test instruments from the start mask, the "Multimeter" mask
Test Instruments
always appears. When switching from the "Guided Fault Finding" or "Vehicle
Self-Diagnosis" mode, the mask that was used most recently appears (multimeter
or DSO).
In the "DSO" mask, press the "Multimeter" button to select the multimeter func-
tions.

6-2 C79298-A3238-X120-04-19
Test Instruments
6.3 Multimeter
Setting the The first time the "Multimeter" mask is entered, it opens in its basic setting "Volt-
multimeter age U/R/D" (see fig. 6-2). From then on, when it is opened the settings that were
in place the last time the mode was used remain in force.
Once the mask appears, the current setting is used to perform a calibration.
Test Instruments Voltage U/R/D

Multimeter
Freeze frame
Minimum
Maximum
Function block 1
Voltage Resistance Diode test Current 50 A Current 500 A Voltage Calibrate

U/R/D U/R/D U/R/D current pick-up current pick-up DSO 1
Inline Continuity test

current U/R/D Function block 2
2V DSO
Go to Print Help
Fig. 6-2 "Multimeter" mask, basic setting
The "Multimeter" mask is used to operate the multimeter as a free measuring

device. You can set measurement functions, perform measurements and read the
test results in it.

C79298-A3238-X120-04-19 6-3
Test Instruments
Function blocks The selectable measurement functions are divided into two function blocks (see
fig. 6-2):
• Function Block 1 (measurements via U/R/D measuring lead).
− Voltage
− Inline current
− Resistance
− Diode test
− Continuity test
• Function block 2 (measurement via current pick-ups, DSO1)
− Current, 50 A current pick-up
− Current, 500 A current pick-up
− Voltage, DSO1
On the screen the buttons which can be used to select the measurement functions
in the two function blocks are shown in differing font colors.
Two simultaneous You can perform one measurement from function block 1 or function block 2 or
measurements you can perform one from each of the function blocks simultaneously (for exam-
ple see fig. 6-9).
Each of the measurements is run as if it were the only measurement being per-
formed.
In order to display both sets of measured values, the display box is split in two.
The first measured value is displayed on the left, the second on the right parallel
to it. Both are displayed cyclically.
Bar display The measured value bar and the min/max display are not shown as long as two
measurements are being performed at the same time.
Calibration An automatic self-calibration feature is built in to the multimeter functions. It is

performed the first time the corresponding button is activated. If you switch
Ñmeasurement types, it will also calibrate in the new measurement type.
This calibration will also take place when you return to the "Test Instruments"
mode if has been more than an hour since the last switch.
You can also perform the calibration manually if necessary (see "Calibrate" but-
ton, section 6.3.8).

6-4 C79298-A3238-X120-04-19
Test Instruments
6.3.1 Direct and Alternating Voltage Measurement
Press on the "Voltage U/R/D" button to select the "Voltage measurement" mea-
Voltage
U/R/D surement function.
Function block 2 Stop the measurement function selected in function block 2 when necessary.
Press the "=" button to select the "Direct voltage" measurement type.
Press the "~" button to select the "Alternating voltage" measurement type.
Press the display box for the measurement range to switch from automatic to
manual measurement range selection. You can reactivate automatic measurement
selection by pressing on the display box a second time.
Press this button to set the higher of the two measurement ranges when selecting
measurement ranges manually.
Press this button to set the lower of the two measurement ranges when selecting
The colors of the triangles on the measurement selection buttons indicate their
status:
• Yellow triangle ⇒ Measurement range changes possible
• Black triangle ⇒ Disabled
Press the "Freeze frame" mask to "freeze" the measured value display.
Freeze frame
Cyclical repetition of the measurement stops and the last display is frozen.
Press the "Freeze frame" button again.
Cyclical repetition of the measurement restarts and the display is updated on a
continuous basis.

C79298-A3238-X120-04-19 6-5
Test Instruments
Freeze frame remote Press the button on the end of the measuring lead test probe to start the "Freeze
control frame" feature by remote control when measuring a vehicle.
Press the "Minimum Maximum" button to start the "Extreme values" function.
The "Extreme values" function calculates the current minimum and maximum
values from the measured values displayed and shows them both in the measured
values bar in the form of two vertical lines. These extreme value lines represent
the fluctuation range of the measured values.
The values calculated for the minimum and maximum measured value are dis-
played below the lines.

Multimeter
Freeze frame
Minimum
Maximum


current U/R/D
20V DSO
Go to Print Help
Fig. 6-3 "Multimeter" mask, voltage measurement

6-6 C79298-A3238-X120-04-19
Test Instruments
6.3.2 Direct and Alternating Current Measurement
Press the "Inline current" button to select the "Current measurement" measure-
Inline
current ment feature.
The rest of the mask is the same as the direct and alternating voltage measure-
5A
ment masks (see section 6.3.1).
Test Instruments Inline current

Multimeter
Freeze frame
Minimum
Maximum


current U/R/D
1A DSO
Go to Print Help
Fig. 6-4 "Multimeter" mask, current measurement

C79298-A3238-X120-04-19 6-7
Test Instruments
6.3.3 Direct and Alternating Current Measurement via Current Pick-up
Press the "Current 50 A current pick-up" or "Current 500 A current pick-up" but-
Current 50 A
current pick-up ton to select the "Current measurement" feature.
Current 500 A
current pick-up
5A
The rest of the mask is the same as the direct and alternating voltage measure-
Test Instruments Current 50 A current pick-up

Multimeter
Freeze frame
Minimum
Maximum


current U/R/D
5A DSO
1A
Go to Print Help
Fig. 6-5 "Multimeter" mask, current measurement with current pick-up

6-8 C79298-A3238-X120-04-19
Test Instruments
6.3.4 Resistance Measurement
Press the "Resistance U/R/D" button to select the "Resistance measurement"

Resistance
U/R/D function.
0 .. 10 MOhm
Press this button to set the higher of the two measurement ranges when selecting
Press this button to set the lower of the two measurement ranges when selecting
Test Instruments Resistance U/R/D

Multimeter
Freeze frame
Standbild
Maximum
Minimum
Voltage Resistance Diode test

Diodenprüfung Current 50 A Current 500 A Voltage Calibrate
U/R/D U/R/D URD
U/R/D current pick-up current pick-up DSO1

current U/R/D
0..100Ohm DSO
Go to Print Help
Fig. 6-6 "Multimeter" mask, resistance measurement

C79298-A3238-X120-04-19 6-9
Test Instruments
When the 0...100 Ohm measurement range is selected, the calibration for this
measurement range is started. A series of dialog boxes prompt you to take the
necessary actions.
The colors of the triangles on the measurement selection buttons indicate their
status:
• Yellow triangle ⇒ Measurement range changes possible
• Black triangle ⇒ Disabled
Use of the "=" and "~" buttons is disabled.
The rest of the mask is the same as the constant and alternating voltage measure-
6.3.5 Continuity Test
Press the "Continuity test U/R/D" button to select the "Continuity test" measure-
Continuity test
U/R/D ment function. It indicates a connection or an open line.
Test Instruments Continuity test U/R/D

Multimeter
Freeze frame


current U/R/D
0 .. 10 Ohm DSO
Go to Print Help
Fig. 6-7 "Multimeter" mask, continuity test, connection

6-10 C79298-A3238-X120-04-19
Test Instruments
Press the "Freeze frame" button.

Freeze frame
continuous basis.
Freeze frame Press the button on the end of the measuring lead test probe to start the "Freeze
remote control frame" feature by remote control.
Display The results of the continuity test are shown in graphical form:
• Open switch symbol ⇒ Interruption
• Closed switch symbol ⇒ Connection
When the closed switch symbol is displayed, a signal tone is also heard.
6.3.6 Diode Test
Press the "Diode test U/R/D" button to select the "Diode test" measurement func-
Diode test
U/R/D tion.

Freeze frame
continuous basis.

C79298-A3238-X120-04-19 6-11
Test Instruments
Freeze frame Press the button on the end of the measuring lead test probe to activate the
remote control "Freeze frame" button by remote control.
Test Instruments Diode test U/R/D

Multimeter
Freeze frame


current U/R/D
DSO
Go to Print Help
Fig. 6-8 "Multimeter" mask, diode test, diode in forward direction
Display The result of the diode test is displayed as a graphical symbol:

• Diode symbol from + to - ⇒ Diode in forward direction
• Diode Symbol from - to + ⇒ Diode in reverse direction
• Closed switch symbol ⇒ Short circuit
• Open switch symbol ⇒ Open circuit
6.3.7 Voltage DSO1
With the "Voltage DSO1" function you have an expanded measurable voltage
range up to ± 400 V in addition to the U/R/D functions. You can use this function
in combination with the measurement functions of function block 1 (fig. 6-2) to
perform two measurements in parallel.

6-12 C79298-A3238-X120-04-19
Test Instruments

Multimeter Voltage DSO 1
Freeze frame


current U/R/D
20V 16 V DSO
Go to Print Help
Fig. 6-9 "Multimeter" mask, voltage measurement via U/R/D and DSO1
6.3.8 Calibrate
Press the "Calibrate" button to perform a manual Ñcalibration of the test instru-
Calibrate
ments and the attached measuring leads. Where necessary, dialog boxes guide
you through the further actions.
You should always perform a manual calibration after switching the DSO mea-
suring leads or moving the current pick-ups to a different position, or if you have
not used the VAS 5051 for a lengthy period of time, especially if it has been
exposed to extreme temperature variations.
Perform the calibration manually to compensate for additional contact resistances
through to the measured object in resistance tests. Short the connections to the
measured object and perform the calibration manually. The calibration will then
cover not only the measuring lead but also the connections to the measured object.

C79298-A3238-X120-04-19 6-13
Test Instruments
6.4 Digital Storage Oscilloscope (DSO)
Starting the DSO If you are in the "Multimeter" mask, press the "DSO" button.
In "Guided fault finding" or "Vehicle self-diagnosis" mode, press the "Test Instru-
ments" button and the mask used most recently in "Test Instruments" mode
appears: this is either the "Multimeter" mask or the "DSO" mask.
The first time the "DSO" mask is opened, it will display the basic settings (fig. 6-
10).
From then on, each time the "DSO" mask is selected the settings used the last
time the mode was started remain in force.
Test Instruments Auto mode

DSO
2 V/Div.= 5 ms/Div. Freeze frame
Measurement 7LPHEDVH
Channel A
range, channel
Channel B
coupling A
Trigger mode
T
Measuring mode
Measurement 7ULJJHUSRLQW
range, channel
coupling %
2 V/Div.=
Multimeter
Position Time/Div.
Go to Print Help
Fig. 6-10 "DSO" mask, basic setting
The "DSO" mask allows you to use the digital storage oscilloscope as a free mea-
surement device. You can set parameters, trigger measurements and read the
measurement results.
You can view up to three measurement channels on-screen at once. To provide
clearer assignment of the functions, the button labels, the parameters and the dis-
played measurement signals are displayed in different colours:
• Channel A: yellow
• Channel B: green
• Preset measurements: blue

6-14 C79298-A3238-X120-04-19
Test Instruments
You can enter the following settings in the "DSO" mask:

• Select the measurement channels using the "Channel A" and "Channel B"
buttons.
• Set parameters for the measurement channels (not available in Auto Setup)
• Select and set parameters for the trigger channel using the "Trigger mode"
button (not visible when you are working in Draw mode).
• Select the measuring mode using the "Measuring mode" button.
• Set the time base using the arrow buttons in the "DSO" mask.
Image position and If none of the buttons "Channel A", "Channel B", "Trigger mode" or "Measuring
time base mode" has been pressed, you can select the image position and the time base.
Press this button to move the curve grid-by-grid to the right and so bring the left
portion of the display box into view.
Press this button to move the curve grid-by-grid to the left and so bring the right
By moving the curve to the right or left, you are also moving the trigger point
(represented by "T").
Press this button to set the higher time base.
Press this button to set the lower time base.
1RWH
The time base 0.01 ms/DIV may only be set for single channel operation (Chan-
nel A or B OFF). The button of the deactivated channel is hidden.
The time bases 20, 50 and 100 s/DIV may only be set in Draw mode.

C79298-A3238-X120-04-19 6-15
Test Instruments
6.4.1 Channel A, Channel B
Press the "Channel A" or "Channel B" button so that the operating functions for
Channel A
"Channel", "Measurement range", "Coupling" and "Default measurement" are
displayed under the display box. This allows you to use them to operate the chan-
Channel B
nel.
In addition, a slide control appears at the right-hand margin of the display box
which can be used to set the vertical shift of the displayed curve.
In a two-channel view, for example, you can position channel A in the upper por-
tion of the display box and the signal curve of channel B at the bottom. This pro-
vides you with a clearer screen view, specially if the signal curves do not
intersect.
DSO
Channel B
Trigger mode
T 0
Measuring mode
2 V/Div.=
0.00
Channel Coupling Default Multimeter
measurement
Go to Print Help
Fig. 6-11 "DSO" mask, Auto mode, Channel A
Press the "Channel" button to enter the test connection for the pre-set channel,
Channel
e.g. "Channel A".
A pull-up menu appears with the following options:
kV
DSO2
DSO1
OFF
The line you select is highlighted.

6-16 C79298-A3238-X120-04-19
Test Instruments
Select the desired test connection (measuring lead) and press the "Channel" but-
ton again (or any other button) to accept the selection and close the menu. If you
select OFF, "Channel A" is inactive.
1RWH
If "Channel B" is already off, the OFF choice does not appear for "Channel A"
and vice-versa.
Measurement range You can change the measurement range by one step by pressing the "Up
arrow" or "Down arrow" buttons. The current measurement range, e.g. "10 /
Div.", is displayed on the left of the display box (yellow - at the top - to match
with channel A and green - at the bottom - to match with channel B).
Press this button to set a larger voltage range.
Press this button to set a smaller voltage range
Press the "Coupling" button to select the coupling for "Channel A".
Coupling
For channel kV: For channel DSO1 and DSO2:
GND GND
DC DC
AC
Select the desired coupling and then press the "Coupling" button again.
• If "GND" is selected, "Channel A" is set to its reference potential (tester
ground) and a flat line is displayed as the signal characteristic. In this function
you can set the zero of the curve display with the slide control.
• If "DC" is selected, the direct and alternating voltage portions of the test si-
gnal are represented. The pre-set DC coupling appears as a "=" symbol on the
touchscreen (e.g. "2 V/Div.=", see fig. 6-10)
• If "AC" is selected, only the alternating voltage portion of the test signal is
represented. The pre-set AC coupling appears as a "~" symbol on the touchs-
creen.
If "OFF" is selected in the channel menu, the "Coupling" button is not visible.

C79298-A3238-X120-04-19 6-17
Test Instruments
Press on the slider and move it up or down the slide bar to shift the curve up or
down.
Touch the slide bar above the slider to move the slider up step-by-step.
Touch the slide bar below the slider to move the slider down step-by-step.
When you press the "Default measurement" button the " Default measurements"
Default
measurement mask appears displaying a list of available sample curves. Below the list are the
"Display", "<", "Go to", "Print" and "Help" buttons.
Select a sample curve from the list. The selected line is highlighted.
Press the "Display" button in the "Default measurements" mask to display a doc-
Display
ument containing information on the selected curve and then display the selected
sample curve itself in the "DSO" mask.
If none of the lines has been selected in the list, the prompt "First select a default
measurement" is delivered. Acknowledge it with "OK".
• The "DSO" mask first displays a document. It may contain text, graphics and
hotspots, and provides information on adaption, the fitting location of the test
object and the operating conditions, for example. If the selected document is
not available, the message "No document available" appears. Press the "Con-
tinue" button to display the sample curve.
• The saved sample curve is displayed in the "DSO" mask in a different color
to the measured value curve.
• The "Default measurement" button is highlighted.
• The name of the default measurement is displayed in an information box dis-
played in the upper right portion of the mask.
• The measuring parameters for the selected channel are set to the values with
which the curve of the default measurement was saved. While a default mea-
surement is on display, only the slide control and the trigger and freeze frame
functions can be operated.
You can now compare the cyclically measured curve with the fixed sample curve.
Press the "Default measurement" button again to end the "Default measurement"
function. The hidden buttons reappear.

6-18 C79298-A3238-X120-04-19
Test Instruments
If, during the "Default measurements" function, you press the "Channel A",
"Channel B", "Trigger mode", "Measuring mode", "Cursor 1" or "Cursor 2" but-
ton (the last two appear when the "Freeze frame" function is opened), the
"Default measurements" function closes automatically and the default curve dis-
appears.
Press this button in the "Default measurements" mask to return to the "DSO" mask
without selecting a default measurement.
6.4.2 Trigger Mode
Press the Trigger mode" button to show the operating functions for "Channel",
Trigger mode
"Coupling", "Edge" and "Vertical movement" under the display box and set them.
A slider also appears at the right edge of the display box which you can use to set
the Ñtrigger level.

DSO
Channel A
Channel B
T 0
Measuring mode
2 V/Div.=
0.0
Channel Coupling Edge Multimeter
Go to Print Help
Fig. 6-12 "DSO" mask, trigger mode
The vertical position of the trigger point in the display field ("T" symbol) indi-
cates the trigger voltage. If it is within the valid measuring range the trigger point
is lit blue; otherwise it appears red.

C79298-A3238-X120-04-19 6-19
Test Instruments
Press the "Channel" button to select the measurement connection for the trigger
Channel
signal.
Pick-up
kV
DSO2
DSO1
Select the desired measurement connection for triggering and press the "Chan-
nel" button again.
Press the "Coupling" button to select the "Coupling" for "Trigger mode".
Coupling
Depending on what is selected, "Channel A" or "Channel B" and the "Coupling"
that is set there, a pull-up menu appears with at least some of the following
options:
HF
LF
DC
AC
The selected line is highlighted.
Select the desired coupling and then press the "Coupling" button again.
• If "HF" is selected, the high frequency portions of the trigger signal are filte-
red out.
• If "LF" is selected, the low frequency portions of the trigger signal are filtered
out.
• If "DC" is selected, the trigger signal is DC coupled.
• If "AC" is selected, the trigger signal is AC coupled. This function cannot be
used in Draw mode.
1RWH
If the "Pick-up" trigger signal is selected, the "Coupling" button is not visible.

6-20 C79298-A3238-X120-04-19
Test Instruments
Press the "Edge" button to select the edge of the trigger or test signal you want to
Edge
trigger.
A pull-up menu appears with the following selections:
neg.
pos.
The selected line is highlighted.
Select the desired edge and then press the "Edge" button again.
• If "neg." is selected, the falling edge of the trigger or test signal is used.
• If "pos." is selected, the rising edge of the trigger or test signal is used.
1RWH
If the "Pick-up" trigger signal is selected, the "Edge" button is not visible.
Press this button to move the curve gradually to the right and so bring the left
Press this button to move the curve gradually to the left and so bring the right
Press the slider and move it up and down the slide bar to change the trigger level.
Press on the slide bar above the slider to move the slider up and set the trigger
level to positive voltage values.
Press on the slide bar below the slider to move the slider down and set the trigger
level to negative voltage values.
1RWH
The slider is not visible when the "Pick-up" trigger signal is selected.

C79298-A3238-X120-04-19 6-21
Test Instruments
6.4.3 Measuring mode
The "Measuring mode" button is used to set parameters for recording measured
Measuring mode
values.
After you press this button, the buttons "Auto Setup", "Auto Level", "Auto",
"Normal", "Single" and "Draw mode" are displayed under the display box.
Test Instruments Auto level mode

DSO
Channel A
Channel B
Trigger mode
T 0
Measuring mode
2 V/Div.=
Auto Setup Auto Normal Single Draw mode
Go to Print Help
Fig. 6-13 "DSO" mask, Auto Level mode, Measuring mode
In auto setup mode the amplitudes of channel A and B, the time base and the trig-
Auto Setup
ger threshold are set automatically.
Auto setup is performed only once each time it is called. Measuring mode then
switches automatically to auto level mode.
In auto level mode the set trigger threshold (percentage threshold in the range
Auto Level
±100 % of the signal amplitude) is tracked automatically so that a triggered
image is always visible independent of the signal amplitude.
In auto mode measured value acquisition starts automatically in free-running

Auto
operation when a valid trigger event occurs (according to the pre-set trigger level)
or when a wait time dependent on the selected time base has elapsed (no freeze
frame).
In normal mode, cyclical data collection takes place only when a valid trigger
event occurs. If the trigger is missing, a prompt appears in the display box at the
right.

6-22 C79298-A3238-X120-04-19
Test Instruments
In single mode, a measurement is taken only once after a valid trigger event.
Single
1RWH
The "Auto Setup" and "Auto Level" functions can only be used if triggered
internally (that is, the trigger signal must be selected as a measure channel) or if
the trigger pick-up is used.
Auto level and auto setup can only function smoothly with periodic signals with
low interference.
In draw mode measured value acquisition takes place without a trigger, the curve
Draw mode
is plotted from left to right continuously. Draw mode displays low-frequency sig-
nals.
1RWH
The time base in draw mode can be set from 0.2 to 100 s/DIV.

C79298-A3238-X120-04-19 6-23
Test Instruments
6.4.4 Freeze Frame with Cursor
6.4.4.1 Freeze Frame with One Cursor Displayed

Freeze frame
Cyclical repetition of the test is paused and the last curve is frozen.
The "Cursor 1" and "Cursor 2" buttons also appear.
continuous basis.
Press the "Cursor 1" or "Cursor 2" button to determine voltage values at specific
Cursor 1
time points on the curve.
The following mask appears when you press the button:
Cursor 2
DSO
Amplitude channel A
4.60 V
Amplitude channel B
0.00 V
T 0 Time value
-15.1 ms
Cursor 1
Cursor 2
2 V/Div.=
Multimeter
Cursor
Go to Print Help
Fig. 6-14 "DSO" mask, freeze frame with a cursor

6-24 C79298-A3238-X120-04-19
Test Instruments
The "Amplitude Channel A" display box (Ñamplitude) shows the voltage value
at the point in the curve for channel A where the cursor is positioned.
The "Amplitude Channel B" display box shows the voltage value at the point in
the curve for channel B where the cursor is positioned.
The "Time value" display box shows the time value at the point in the curve
where the cursor is positioned, referred to the trigger point (symbol "T").
Touch the curve to move the cursor (rough control).
Press this button to move the cursor to the left (fine control).
Press this button to move the cursor to the right (fine control).
Parameters changed If you change parameters while using the "Freeze frame" function, the curve on
display is not affected. The message "Parameter changed" does, however, appear
in the information box at the right because the curve and the set parameters no lon-
ger match.
6.4.4.2 Freeze Frame with Both Cursors Displayed

Freeze frame
Cyclical repetition of the test is paused and the last curve is frozen.
The "Cursor 1" and "Cursor 2" buttons also appear.
continuous basis.

C79298-A3238-X120-04-19 6-25
Test Instruments
Voltage difference Press the "Cursor 1" and "Cursor 2" buttons to set the voltage and time difference
values values at specific time points on the curve.
Press the "Cursor 1" button and place the cursor on the curve at the point for
Cursor 1
which you want to determine the voltage and/or time differences for cursor 2 (ref-
erence), as described in section 6.4.4.1.
Press the "Cursor 2" button and place the cursor at the point on the curve for
Cursor 2
which you want to determine the voltage differences to the position of
cursor 1.
When the "Cursor 2" button is pressed, cursor 1 cannot be moved.
Touch the curve to move the cursor (rough control).
Press this button to move the cursor to the left (fine control).
Press this button to move the cursor to the right (fine control).
The following mask appears when you have pressed both buttons:

DSO
Amplitude diff. A
4.60 V
Amplitude diff. B
2.30 V
T 0 Time difference
25.1 ms
Cursor 1
Cursor 2
2 V/Div.=
Multimeter
Cursor
Go to Print Help
Fig. 6-15 "DSO" mask, freeze frame with two cursors

6-26 C79298-A3238-X120-04-19
Test Instruments
The "Amplitude difference A" display box shows the voltage difference between
the two points on the curve for channel A where the cursors are located.
The "Amplitude difference B" display box shows the voltage difference between
the two points on the curve for channel B where the cursors are located.
The "Time difference" field shows the time difference value between the points
where the cursors are located.
6.4.5 Tips and Information
Auto setup - Your The DSO is equipped with an auto setup mode which automatically calculates
most valuable and makes all DSO settings in response to periodic input signals. If channels A
button and B and the trigger are correctly selected, after a short time you will get an opti-
mally triggered display which continues in "Auto level" mode.
If no curve is displayed, check why in the following order:
1. Are the DSO leads correctly connected to the tester?
For most applications connect the DSO leads as follows:
DSO1 lead to input DSO1, DSO2 lead to input DSO2
2. Is the correct channel input selected?
For most applications set the DSO for "Channel A" or "Channel B" as fol-
lows:
Channel A to DSO1 (default), channel B to DSO2 (default)
3. Is the correct trigger channel selected?
For most applications set the channel in trigger mode as follows:
Channel to DSO1 (default)
4. Repeat auto setup.
If possible, auto setup mode with switch to auto level mode is always preferable.
Auto setup can also be repeated at any time.
No trigger In "Normal" and "Single" modes: The triggering is only optimum if you adjust
the trigger point to an unambiguous amplitude value. Use the trigger’s fine
adjuster. If the trigger is outside the amplitude, the message "No trigger" appears.
Depending on the preconditions, no signal characteristic at all or a frozen signal
characteristic (no measurement) will be displayed.
Now return the trigger manually to the amplitude range until the message disap-
pears.

C79298-A3238-X120-04-19 6-27
Test Instruments
Auto-level In auto level mode you can trigger signals independently of their amplitude and
zero position, because then the triggering is based on a percentage amplitude
value.
When you move out of auto setup mode triggering is set automatically to 0 % of
the amplitude value. In trigger mode you can use the slide control to set any
unambiguous trigger value between ± 100%; otherwise the DSO triggers in the
middle of the measured signal.
Auto If you have no information about the signal, use auto mode. You will then get a
signal curve even if the trigger is outside the amplitude.
Now adjust the trigger manually to an unambiguous value in the amplitude range.
Normal Use normal mode if you are familiar with operation of the DSO. You will only
get a triggered image when the trigger is within the amplitude range of the mea-
sured signal.
Single In single mode you can record a one-off event. The signal is measured and dis-
played immediately as a freeze frame. Note that a valid trigger event must have
occurred.

6-28 C79298-A3238-X120-04-19
Guided Fault Finding
7 Guided Fault Finding
7.1 Overview
The "Guided Fault Finding" operating mode "guides" you from detecting a vehi-
cle malfunction (Ñfault symptoms) to finding the fault origin and solution. All
vehicle information (equipment, symptoms, functions and components, docu-
ments, and test programs) is compiled automatically.
All functions in the "Vehicle Self-Diagnosis" and "Test Instruments" operating
modes are available for "Guided Fault Finding".
The fault symptoms are delivered to guided fault finding from two different
sources:
• Fault memory contents
• Complaint reports
In addition, you have the option of selecting and executing function tests of sus-
pect functions or components.
The guided fault finding process is shown in fig. 7-1.
1RWH
On devices with marque separation you can only use "Guided fault finding"
mode if at least one marque-specific CD is installed on the VAS 5051. For
details of installation of marque-specific CDs refer to section 9.4.
Vehicle Guided fault finding begins with vehicle identification. You can choose the vehi-
identification cles and basic characteristics from selection menus un a sequence of five masks.
At this point, the tester does not need to be connected to the vehicle.
Vehicle system test After the vehicle identification, the vehicle system test is performed with the
diagnostic cable connected and the ignition on. All electronic vehicle systems
that could occur in the identified vehicle are displayed in a list. The vehicle com-
munication checks which vehicle systems are available, and their fault memories
are read.

C79298-A3238-X120-04-19 7-1
Complaints If no fault is detected in the vehicle system test, the guided fault finding automat-
ically branches to input of complaints. You can enter the customer’s complaints as
well as your own observations. Several symptoms can be formulated to arrive at
precise Ñfault characteristics. The tester analyzes the symptoms with the expert
knowledge held on the hard drive.
Function and Here you can enter functions or components that, based on your experience,
component could be possible sources of the fault. The selected functions and/or components
selection are entered in the test plan (ÑOwn test plan).
VHFWLRQ
Vehicle
identification
VHFWLRQ
VHFWLRQ
Function/component Vehicle system test
selection
VHFWLRQ
All fault
memories Complaints
empty? yes
no
Test plan
VHFWLRQ
VHFWLRQ
Function test
Vehicle
self-diagnosis
End guided
VHFWLRQ
Test fault finding
instruments
Fig. 7-1 Principle of the guided fault finding process

7-2 C79298-A3238-X120-04-19
Test plan From the test plan, the function test or tests is/are processed one after the other.
The results lead to a re-evaluation of the test plan so the sequence of suggested
function tests may change, function tests may be removed or others may be
added.
Function test A function test is a sequence of test steps that check a vehicle’s functioning, a
component group or a component based on fixed requirements. The test program
delivers an indication of the status of the tested vehicle functions, component
groups or components, e.g.: "OK", "Not OK", "Don't know", etc. The function
test is dialog-guided, uses the test instruments options (multimeter, oscilloscope),
and communicates with the vehicle systems.
Exit guided When you exit from the guided fault finding, the fault memories of the electronic
fault finding vehicle systems are erased automatically and then read out. If faults still occur,
the guided fault finding can be continued or canceled based on the user's deci-
sion.
Switch In guided fault finding, you can switch to the "Test Instruments" or "Vehicle Self-
Diagnosis" operating modes via buttons on the navigation bar. Then you can exe-
cute a measurement or diagnostic function, for example. "Test Instruments" and
"Vehicle Self-Diagnosis" functions currently in use by guided fault finding are
hidden.
Switching back to "Guided Fault Finding" mode always exits the mask in which
the "Switch" button was clikked. There processing of the mode can be resumed
without limitations.
7.2 Start Guided Fault Finding
"Guided Fault Finding" is called up from the start mask by choosing the button
with the same name. The start is followed immediately by the vehicle identifica-
tion function.
1RWH
You can save time by starting guided fault finding immediately with a connected
diagnostic cable and the vehicle’s ignition on. Then, after the vehicle identifica-
tion the VAS 5051 automatically interrogates the fault memory contents of the
definitely installed vehicle systems.

C79298-A3238-X120-04-19 7-3
Fig. 7-2 Starting guided fault finding
7.3 "Go to" Destination Menu
The "Go to" destination menu can be used for fast switching between several
masks.
The destination menu contains the titles of the fault finding masks that have been
accessed, e.g. "Vehicle system test", "Fault memory contents", "Test plan" and
sub-masks of the function test. User-guided masks such as "Complaint report",
"Function/Component Selection" as well as "Documents" also are contained in
the menu (for example see fig. 7-30).
Since the "Test Instruments" and "Vehicle self-diagnosis" operating modes can be
activated directly with buttons on the navigation bar, they are not included in the
"Go to" destination menu.

7-4 C79298-A3238-X120-04-19
7.4 Vehicle Identification
The vehicle identification function serves to provide a unique identification of the

5HDGLQJDLGIRU
vehicle and its equipment, and subsequently delivers the associated test data.
JXLGHGIDXOWILQGLQJ
In vehicle identification, you select the basic characteristics of the vehicle from a
FRORUHGEDFNJURXQG
series of selection lists. Basic characteristics are:
PDWFKLQJWKHGHVFULSWLRQ
• marque,
• type,
•
0DUTXH9:
model year,
• body version and
• engine code letters
7\SH3DVVDW!
The selected characteristics are shown in the right-side information window so
you can check the selection.
0RGHO\HDU
You can switch to the previous mask at any time with the "Back" button in order
to make a different selection.

%RG\YHUVLRQ6DORRQ Vehicle identification Passat 1997>
1997
Select Saloon
engine code
(QJLQHFRGH
ACK 2,8l Motronic / 142kW
$'5O0RWURQLF
ADR 1,8l Motronic / 92kW
AEB 1,8l Motronic / 110kW
AFN 1,9l TDI / 81kW
&RQILUPYHKLFOH AGZ 2,3l Motronic / 110kW
LGHQWLILFDWLRQ ALP 2,3l Motronic / 110kW
AHL 1,6l Simons / 74kW
AHU 1,9l TDI / 66kW
'LDJQRVWLFFDEOH
FRQQHFWHG"
yes
9HKLFOHV\VWHPWHVW
Test instruments Vehicle Go to Print Help
self-diagnosis
Fig. 7-3 "Select engine code" mask

C79298-A3238-X120-04-19 7-5
Confirm vehicle The following mask terminates the vehicle identification. The selected character-
identification istics are shown in the right-side information window. Check whether the vehicle
to be diagnosed matches your entries. You can switch to the previous mask with
the "Back" button to make changes.

1997
Confirm Saloon
vehicle identification ADR 1,8l Motronic / 92kW
(QJLQHFRGH
If the vehicle identification has been
carried out correctly, then press the
"Continue (>)" key as confirmation.
&RQILUPYHKLFOH You may page back

LGHQWLILFDWLRQ using the "Back (<)" key.
Use the "Go to" key and select

QR "Cancel" to return to the "Select Marque"
'LDJQRVWLFFDEOH
mask .
FRQQHFWHG"
Use the "Go to" key and select

\HV
"Exit" to return to the
Start mask.
9HKLFOHV\VWHPWHVW
Test instruments Vehicle Go to Print Help
self-diagnosis
Fig. 7-4 "Confirm vehicle identification" mask
When you choose the "Continue" button, the diagnostic data belonging to the
vehicle indicated is loaded from the hard drive and delivered ready for the further
guided fault finding steps.
When you switch to the next mask, "Vehicle system test", a check is made
whether the diagnostic cable is connected to the vehicle. If there is no connection,
a mask appears indicating where the diagnostic cable should be connected in the
vehicle.
If the connection via the diagnostic cable is OK, the "Vehicle system test" mask is
displayed.

7-6 C79298-A3238-X120-04-19
7.5 Connect Tester and Vehicle via Diagnostic Cable
If you have not yet connected the diagnostic cable to the vehicle, after confirma-
tion of the vehicle identification (see fig. 7-4) you receive a prompt to make the
connection. The location of the diagnostic connection is shown in a document.

1997
Connect VAS 5051 Saloon
to vehicle ADR 1,8l Motronic / 92kW
(QJLQHFRGH Connect the VAS 5051 tester using diagnostic
cable VAS 5051/1 or VAS 5051/3
as follows:
- Remove the cover from the diagnostic

&RQILUPYHKLFOH
connection to the right of the hand brake
LGHQWLILFDWLRQ lever.
- Now switch on the ignition.
QR
'LDJQRVWLFFDEOH
FRQQHFWHG"
\HV
9HKLFOHV\VWHPWHVW

self-diagnosis
Fig. 7-5 "Connect VAS 5051 to vehicle" mask

C79298-A3238-X120-04-19 7-7
7.6 Vehicle System Test
The vehicle system test is used to check the electronic systems installed in the
vehicle. Communication with the control unit of the corresponding vehicle sys-
tem is checked, and the fault memory read out, individually in succession.
All possible vehicle systems and their variants for the identified vehicle are
shown in the "Vehicle system test" mask (see fig. 7-6). They are compiled in a list
in the following groups:
• Drive unit and power transmission
• Running gear
• Body / Heating, cooling, air conditioning / Electrical system
For the sake of clarity, the lines for each group are distinguished by different
background colors.
The vehicle system test is performed
• when the diagnostic cable is already connected, by choosing the "Continue"
button in the "Confirm vehicle identification" mask (see fig. 7-4) or
• by connecting the diagnostic cable subsequently and then choosing the "Con-
tinue" button in the "Connect vehicle to VAS 5051" mask (see fig. 7-5).
Observe vehicle In the vehicle system test the possibly installed control units are addressed via the
system test diagnostic lead connected to the vehicle, and their fault memories are read. If the
communication link is successfully set up, in the "Vehicle system test" mask the
relevant list entry, e.g. " Motronic engine management system", is highlighted
(control unit successfully identified with or without fault).
If a control unit included in the selection list has not been identified, it should be
manually selected from the mask by the user. Only then will the associated diag-
nostic data be delivered in the function/component selection .
The rest of the vehicle system test can be observed on the touchscreen. The desig-
nation of the tested vehicle system is shown in the left-side information box, e.g.:
Motronic engine management system
During the "Read fault memory" process the associated line is flagged by an
arrow symbol: "<==".
Identified vehicle systems are highlighted with a black bar; the text is inverted.
Vehicle systems that are ruled out by an already identified system are skipped.
For vehicle systems that cannot be unambiguously identified, a prompt appears
when necessary to clarify the actually installed equipment.
Systems whose fault memories are not empty show the status "Fault" in the line
at the right.

7-8 C79298-A3238-X120-04-19
After an executed test, the information box in the mask shows the message:
Control units interrogated
The vehicle system test requires a functioning diagnostic connection to the vehi-
cle, otherwise the following message appears during communication with the
first control unit:
Diagnostic bus faulty
No voltage or
voltage too low
on diagnostic bus
Vehicle battery voltage too low?

Diagnostic connector connected
to vehicle?
Fault number: 200.17

First check whether the ignition is on and confirm the message with "Repeat". If
the message appears again, your further decisions should take account of whether
the vehicle system is definitely installed or not. All entries for vehicle systems
highlighted with a black bar in the "Vehicle system test" mask are definitely
installed.
Definitely installed If communication with a definitely installed control unit is not possible, no mark
control unit is made in the list and the following prompt appears:
not detected
Communication with
definitely installed control unit
not possible.
Retry Cancel
If no communication is possible after "Retry", select "Cancel".
1RWH
If all control units have been interrogated, you must select the "definitely instal-
led control units" in the "Vehicle system test" mask manually.
The following prompt appears:

Control unit not recognized.
To enter it anyway,
choose "OK".
Choose "OK" so that the data relating to the definitely installed control unit
(Ñdiagnostic objects) are available.

C79298-A3238-X120-04-19 7-9
Optional If an optionally installed vehicle system could not be identified, its entry in the
vehicle system not list is not marked. The same prompt as for "definitely installed" control units
recognized appears.
Click "OK" if you are sure that the vehicle system is installed.
Observe vehicle
system test Passat 1997>
Vehicle system test
1997
Control units interrogated Saloon
Motronic engine management system
4-speed automatic gearbox 01N
&RQILUPYHKLFOH
4-speed automatic gearbox 01V
LGHQWLILFDWLRQ
ABS - Bosch 5.3
ABS/EDS Bosch 5.3
ABS/EDS Bosch 5.3 QUATTRO
Airbag - with side airbag
QRQ
'LDJQRVWLFFDEOH
Airbag - without side airbag
FRQQHFWHG"
Climatronic
Immobiliser / Dash panel insert
\HV
Immobiliser / dash panel insert with navigation system
Convenience system - front door control units Fault
9HKLFOHV\VWHPWHVW
Convenience system - front and rear door control units
5HDGIDXOWPHPRU\

self-diagnosis
'LVSOD\IDXOWPHPRU\
FRQWHQWV Fig. 7-6 "Vehicle system test" mask, test finished
During the vehicle system test, all the buttons on the navigation bar except
QR
)DXOW
"Help" are hidden.
SUHVHQW"
After the vehicle system test is finished, you can navigate with the "Continue" or
"Go to" buttons.
\HV
Pressing the "Continue" button always leads you to the "Fault memory contents"
mask (see fig. 7-7).
You can use the "Go to" button in this mask to enter the "Function/component
selection" mask (see section 7.11).
Table 7-1 Status symbols in the vehicle system test
Status symbols in the Symbol Meaning

vehicle system test Normal text Control unit not identified or deselected
Inverted text Control unit identified
3 Fault memory empty
? Fault memory unknown
Fault Fault memory not empty
I Control unit has no communications interface
F Control unit manually selected
E Control unit manually deselected
<== Control unit being interrogated

7-10 C79298-A3238-X120-04-19
7.7 Fault Memory Contents
The "Fault memory contents" mask informs you of faults in the vehicle electronic
systems. If no fault is detected, the following text appears in the lower left-side
information box:
No faults detected
If faults are detected, the mask displays the number of faults and lists them indi-
vidually. Each entry consists of the fault code, fault text and notes on the type of
fault.
Fault memory con-

Test Instruments VW
tents and their allo- Passat 1997>
cation Fault memory contents
1997
Saloon
Convenience system central module 1 fault(s) detected
9HKLFOHV\VWHPWHVW
00928
5HDGIDXOWPHPRU\
Locking unit for CL driver side F220
Implausible signal
'LVSOD\IDXOWPHPRU\
FRQWHQWV
QR
)DXOW
SUHVHQW"
\HV Test Instruments Vehicle Go to Print Help

self-diagnosis
7HVWSODQ
Fig. 7-7 "Fault memory contents" mask
If an error was indicated, choose the "Continue" button to move into the "Test
plan" mask (see fig. 7-8), otherwise you are routed to the "Complaint report" mask
(see section 7.10).

C79298-A3238-X120-04-19 7-11
7.8 Test Plan
When you switch to the "Test plan" mask, the results of the previously run masks
"Fault memory contents", "Complaint report" and "Function/ Component selec-
tion" are analyzed, and from them a test proposal is generated and shown in list
form (see fig. 7-8). The priority of the tests is printed according to ranking. In the
concrete example, the contents of a fault memory (see fig. 7-7) lead to a test pro-
posal that is entered in the test plan and preselected. Choose the "Continue" but-
ton to start the marked function test.

Test plan Passat 1997>
1997
Saloon
Locking unit for CL driver side F220 -Implausible signal
'LVSOD\IDXOWPHPRU\ - F220 - locking unit for central locking - driver side
FRQWHQWV
QR
)DXOW
GHWHFWHG"
Function test of the Symptom

\HV
vehicle functions or components
7HVWSODQ
Function test status

self-diagnosis
)XQFWLRQWHVW
Fig. 7-8 Test plan (based on fault memory contents)Status information
The "Test plan" mask contains status information regarding the function test at
the left next to the test proposal.
Table 7-2 Meaning of icons for the function test status
Icon Meaning: Function test
- Not yet executed
OK OK
OK! OK and checked again
OK? Probably OK
X Not OK
? Result unknown or canceled
? Being executed

7-12 C79298-A3238-X120-04-19
7.9 Function Test
A function test is assigned to each vehicle function, component group and com-
ponent. Its task is to test the set requirements. The result is either "OK", "Not
OK" or "Test result unknown".
A function test mask is shown in fig. 7-9. Each function test consists of self-con-
tained steps that can be repeated after processing via the Go to menu. The desig-
nation of the current test step being run through is shown in the mask in the left-
side information window.
A function test can use the full measurement functionality of the tester over the
diagnostic bus, as well as the multimeter and the oscilloscope. Also, you are
actively involved in the process for connecting measuring leads, making deci-
sions and entering values, for example. The corresponding image documents are
also offered for display in the function test.
After completing the function test, you switch back to the "Test plan" mask.
There you can access alternative diagnostic procedures via the "Go to" menu
(complaints, function/component selection).
When a function test is started, in this example a general note on the test first
appears:
'LVSOD\IDXOWPHPRU\
FRQWHQWV

Function test Passat 1997>
1997
QR
)DXOW Locking unit for CL driver side F220 Saloon
GHWHFWHG"
Note
Ready
\HV This test checks the locking unit for central
locking - driver side -F220- and its wiring.
7HVWSODQ
)XQFWLRQWHVW
/RFNLQJXQLW
Meßtechnik
Test instruments Fahrzeug-
Vehicle Sprung
Go to Druck
Print Hilfe
Help
Eigendiagnose
self-diagnosis
Fig. 7-9 Function test, general note

C79298-A3238-X120-04-19 7-13
As the function test continues, various masks appear depending on the test, for
example:

)XQFWLRQWHVW
1997
/RFNLQJXQLW
Saloon
Check fuses
Yes
3URPSW
- Check fuses -S14- and -S38-.
Note: No Fuse
assignment
Fuses from number S24 upwards are labeled
with an extra 2 in the current flow diagram -
e.g. S38 is labeled as S238 in the current flow
diagram.
2XWSXWWRWKHXVHU
Are the fuses OK?
Meßtechnik
Test Instrument Fahrzeug-
Vehicle Sprung
Go to Druck
Print Hilfe
Help
Eigendiagnose
self-diagnosis
Fig. 7-10 Function test, output to the user
Choose the "Fuse assignment" button. You immediately get the associated image
document (see fig. 7-11).
)XVHDVVLJQPHQW
LPDJHGRFXPHQW

Function test
Passat 1997>
1997
Saloon
Locking unit for CL driver side F220 ADR 1,8l Motronic / 92kW
Fuse box: Fuse assignment
Meßtechnik
Test Instruments Fahrzeug-
Vehicle Sprung
Go to Druck
Print Hilfe
Help
Eigendiagnose
self-diagnosis
Fig. 7-11 Document display, "Fuse assignment" example

7-14 C79298-A3238-X120-04-19
Return to the previous mask with the "Back" button and proceed to the next test
step with the "Continue" button.
One of the components of the function test in the example is a voltage measure-
ment. The relevant mask contains an instruction as to where the measuring leads
should be connected. The "Measure" button triggers the measurement process.
The process also can be controlled remotely with the button on the measuring
lead test probe, for example directly on the measurement object.
If no measurement is possible or if an external measurement device is to be used
for the measurement, you can enter the value manually. Touch the result box (see
fig. 7-12). A numeric keyboard appears.

)XQFWLRQWHVW Function test Passat 1997>
1997
/RFNLQJXQLW

Saloon
Test voltage to driver’s side central locking
$GGLWLRQDOPDVNV
Voltage measurement
Pin assignment
U/R/D test probe (+) on connector -T6r/5-COM

Connector view
test probe (-) on connector - T6r/4-The brown
connector -T6r- is located in chamber 2 of the
coupling station,
0HDVXUHPHQW A-pillar, driver side (see <Connector view> button). 5HVXOWER[

9ROWDJH
-20.00 9.00 14.50 20.00
4 V Measure
Go to Print Help
Fig. 7-12 Function test, voltage measurement
After the function test, the guided fault finding mode returns to the "Test plan"
mask (see fig. 7-8).
(QGRI
)XQFWLRQWHVW

C79298-A3238-X120-04-19 7-15
7.9.1 Test Dialogs
The following types of user/test dialogs occur within the function test:
• Yes/no questions with two buttons to answer
• Measurement instruction with one button to start or stop cyclical measured
value display
• Prompts to the user with one button for messages
• Menus with selection options up to eight buttons
• Result displays with one button to start or stop cyclical measured value dis-
play
• Displays without button for cyclical output of texts or values. A cyclical out-
put can be interrupted either by program control from the test program or by
pressing a button.
Input instructions to enter a number value or text by way of an on-screen key-
board.
Each test dialog step is activated only by pressing a corresponding button, e.g.
"Ready/Finished", "Yes", "No", etc.
Every test dialog step can contain buttons for displayable image documents. The
images are displayed by choosing the appropriate button, switching into the doc-
ument display and then returning to the test dialog step.
Yes/No question The "Yes/No question" mask is used to check test prerequisites. The mask may
contain additional buttons to activate help texts or documents.
The "Yes/No question" is confirmed with the "Yes" or "No" button. Then the
"Continue" button is active.
Dialog boxes with Yes/No questions, menus or prompts are continued automati-
cally with the "Yes" button.

7-16 C79298-A3238-X120-04-19
Measurement The workspace of the "Function test, Voltage measurement" mask (see
instruction fig. 7-12) contains a description of the measurement ("Test voltage to driver’s
side central locking"), an indication of the measurement type ("Voltage measure-
ment"), the instructions for connection of the measuring lead, and the specified
target and measured values, with analog and numeric output.
The analog measured value display contains a numerically labeled scale. A rect-
angle indicates the tolerance range for the measured value. The measured value
appears as a horizontal, colored bar in the labeled scale. If the measured value is
OK (green), the bar protrudes into the tolerance window.
The numeric display also contains the physical measured unit.
Measurements of numeric values must be triggered separately after setting up the
specified connections and choosing the "Measure" button. The measurement is
repeated cyclically several times, for as long as the button is pressed; the last
measured value after pressing the "Continue" button is accepted. When you press
the "Measure" button again, the continuous measurement is stopped and the last
displayed value is maintained. For measurements that are triggered by a certain
trigger condition (events), the "Measure" button releases the trigger. The mea-
surement is triggered automatically when the trigger event occurs.
Alternatively, the "Measure" button can be remotely triggered via the button in
the red test probe.
Default values, If the internal measurement device is defective, or if you prefer your own mea-
using own measu- surement device, you can enter the determined test value via an on-screen key-
ring equipment board. The keyboard automatically appears when you touch the input box or if
the internal test instruments are faulty. Remove the keyboard from view after
ending input by choosing "Q" or "Continue" or by triggering a genuine measure-
ment with the "Measure" button. The physical unit for the input (e.g.: V, mV) is
set automatically.

C79298-A3238-X120-04-19 7-17
Default value input If communication with vehicle systems is not possible, a "Fault signal" dialog
in communication box appears. When you confirm the dialog box with the "Cancel" button, a fur-
with vehicle systems ther dialog box appears with the query:
Continue with default values?

If you answer the question with "yes", a keyboard for entry of data is displayed.
1RWH
Input of default values for measurement values from vehicle systems requires
special knowledge about the system.
Using the A numeric keyboard is displayed in the test dialog window for input of default va-
on-screen lues. Enter the values by pressing the buttons. The values you enter appear in the
keyboard one-line display box of the test dialog window. You can erase entries backward
character by character with the "C" button and then retype them. You can enter a
maximum of 64 characters. Terminate input with the "Q" button or the "Continue"
button. The keyboard is then hidden from view. You can display the keyboard
again by clicking on the display box.
7.9.2 Working with the Digital Storage Oscilloscope (DSO)
Graphical Graphical curves are measured and displayed cyclically by the DSO with the pa-
curves rameters set by the function test. Choose the "Freeze frame" button to stop cyclical
repetition of the measurement. The last display remains static. Choose the "Freeze
frame" button again to restart cyclical repetition of the measurement. The "Freeze
frame" button can also be activated with the button in the red test probe.
7.9.3 Exit Test Step
You can exit the "Function test" mask to switch to the "Test plan" only when all
user inputs have properly terminated and an unambiguous test status has been re-
ached. Missing information or user actions still needed are indicated by prompts.

7-18 C79298-A3238-X120-04-19
7.9.4 Returning to the "Function Test" Mask
You can switch to a previous mask by choosing the "Back" button or via the "Go
to" menu
7.9.5 Exit Guided Fault Finding
You always quit guided fault finding by choosing "Exit" from the "Go to" menu.
This action erases the fault memories of the vehicle systems are erased and reads
them out again to display any still existing faults. If a fault memory is still set, the
following message appears:
All fault memories have been erased,
but relevant faults have remained recorded
or have been recorded again.
To restart from the "Fault memory contents"

mask, press "OK".
To cancel and exit, press "Cancel".

C79298-A3238-X120-04-19 7-19
7.10 Complaint Report
The "Select complaint" mask is displayed automatically if no vehicle systems

faults were detected in the "Fault memory contents" mask (see fig. 7-7) and you
chose the "Continue" button there. The input of complaints is an extra option for
input of fault symptoms.
9HKLFOHV\VWHPWHVW
The "Complaint report" masks contain lists of terms with which you can enter the
5HDGIDXOWPHPRU\
complaints reported by the customer or those that you detect. A complaint can
relate to a repair group or to perceptions, and is described by one or more fault
symptoms.
'LVSOD\IDXOWPHPRU\
FRQWHQWV
You can select one element per mask from the lists of terms. Each selection is
accepted immediately and an automatic switch is made to the next mask. You can
QR
go to the previous mask at any time with the "Back" button and change your
)DXOW selection. The selected complaints are displayed one after the other in the right-
GHWHFWHG" side information window of the masks.
\HV
You do not have to indicate all levels of a certain complaint. As soon as the "Con-
tinue" button appears, you can switch to the "Display all selections" mask (see
&RPSODLQW
fig. 7-18).
UHSRUWV
Example of mask sequence: "Complaint directly related to repair group":
7HVWSODQ Guided fault finding VW

Complaint report Passat 1997>
1997
Select Saloon
complaint ADR 1,8l Motronic / 92kW
Complaint directly related to repair group
Complaint related to observation

self-diagnosis
Fig. 7-13 "Select complaint" mask
(Select the "Complaint related to observation" option if you perceived a symptom

by your senses.)

7-20 C79298-A3238-X120-04-19

Complaint report Passat 1997>
1997
Select Saloon
subsystem / observation ADR 1,8l Motronic / 92kW
Drive unit
Running gear
Body

self-diagnosis
Fig. 7-14 "Select subsystem / observation" mask
For example, select the term "Drive unit" in the mask shown above and switch to
the following mask (see fig. 7-15). The current path is shown in the right-side
information window for clarity.
Guided fault finding Drive unit

Complaint report
Select
type / component
Engine
Gearbox
Immobiliser

self-diagnosis
Fig. 7-15 "Select type / component" mask

C79298-A3238-X120-04-19 7-21
Specify the symptom in detail by selecting a phrase. The Ñpreselection is shown

in the information window.

Complaint report Engine
Select
assembly / feature
Idling The path is logged here.

Lack of power
Smoking
Start
Cuts out when pulling away
Cuts out sporadically
Has brief harsh misfires
Running rough, juddering
Does not respond to throttle after overrun
Responds with delay
Judders in overrun
Glow period warning lamp flashes, fault lamp lit

self-diagnosis
Fig. 7-16 "Select assembly / feature" mask
Complete the symptom by selecting a further feature.

Start
Select
assembly / symptom
Intermittently fails to start

Starts up and cuts out again
Poor starting when cold
Does not start at all
Poor starting when warm

self-diagnosis
Fig. 7-17 "Select assembly / symptom" mask

7-22 C79298-A3238-X120-04-19

Complaint report
Engine
Start
Display all selections
Accept

self-diagnosis
Fig. 7-18 "Display all selections" mask before acceptance of the symptom
The "Accept" button appears if the tester is aware of a diagnostic suspicion in

respect of a vehicle system or component as the possible cause of the selected
symptom (right-side information window). When you choose the "Accept" but-
ton, the symptom is adopted into a list (see fig. 7-19).

Start
Display all selections
Drive unit Engine Start Starts up and cuts out again
Erase

self-diagnosis
Fig. 7-19 "Display all selections" mask after accepting the symptom

C79298-A3238-X120-04-19 7-23
You can formulate additional symptoms. Go to the beginning of the complaint

report using the Go to menu, and select another symptom.
Choose the "Continue" button to leave the "Complaint report" function and
switch to the "Test plan" mask. When the switch is made, the tester delivers the
test proposal matching the symptom and enters it in the test plan.

1997
Saloon
Engine - Start - Starts up and cuts out again
- N18 - Exhaust gas recirculation valve
- Quantity injected
- J362 - Immobilizer control unit

self-diagnosis
Fig. 7-20 -#Test plan with test proposal on the basis of an entered symptom
The further procedure continues as described in section 7.9.

7-24 C79298-A3238-X120-04-19
7.11 Function/Component Selection
You can use your personal expert knowledge with the help of the "Function/com-
ponent selection" function in the course of guided fault finding. In contrast to the
evaluation of fault memories (see section 7.7) or complaint reports (see
section 7.10), here you can directly select suspect functions or components.
9HKLFOHV\VWHPWHVW5HDG 1RWH
IDXOWPHPRU\
Only functions and components of vehicles systems are displayed that are mar-
*RWR
ked in the "Vehicle system test" mask (fig. 7-6), i.e. ones that were automati-
'LVSOD\IDXOWPHPRU\ cally identified or selected manually.
FRQWHQWV
After selection of the functions or components, the tester automatically assigns

the appropriate function tests. In this way, you set up your "own test plan". The
)DXOW designations of the functions or components appear in the "Test plan" mask under
GHWHFWHG"
"Own test plan" if system-guided test proposals are already present. In the
remainder of the example this is assumed to be the case.
\HV
You enter the "Function/component selection" mask from the "Vehicle system
)XQFWLRQ test" mask with the "Go to" button. Selection of function, repair group, compo-
&RPSRQHQW
nent group and component from the displayed lists is spread over several masks,
VHOHFWLRQ
similarly to the complaint report (see section 7.10).
When selecting functions and components, the list display builds in the form of
7HVWSODQ
levels identified by indents to the right of the previous selection. Example:
Drive unit
ADR Engine
01 - Systems capable of self-diagnosis
0RWURQLFHQJLQHPDQDJHPHQWV\VWHP
Electrical components
etc.
Each indent indicates a selection in a mask. To jump back one level, select the
previous level. Example:
Drive unit
ADR Engine
6HOIGLDJQRVLVFDSDEOHV\VWHPV
13 - Crank operation
etc.
Example of a mask sequence "Function/component selection":

C79298-A3238-X120-04-19 7-25

Function/component selection Passat 1997>
1997
Select function or component Saloon
Drive unit
Running gear
Body
Testing and measuring devices, supplementary items

self-diagnosis
Fig. 7-21 "Select function or component" mask
For example, select "Drive unit". After your selection, the following mask is dis-
played automatically.

1997
Drive unit
ADR - Engine

self-diagnosis
Fig. 7-22 "Select function or component" mask, 1st level
In this mask, detail the function/component.

7-26 C79298-A3238-X120-04-19
After your selection, the following mask is displayed automatically.

1997
Drive unit
01 - Self-diagnosis
32 Torque converter
37 Controls, housing
38 Gears, Hydraulic controls
39 Final drive, Differential

self-diagnosis
Fig. 7-23 "Select function or component" mask, 2nd level
In this sub-mask, select the desired component group. To change your selection,
touch the previous selection.

1997
Drive unit
01 - Self-diagnosis
Voltage supply
Connections to engine
Connections to air conditioning system
Connections to dash panel insert
Functions

self-diagnosis
Fig. 7-24 "Select function or component" mask, 3rd level

C79298-A3238-X120-04-19 7-27
In this sub-mask, select the desired component or a function. The selection is dis-
played until you touch the "Continue" button, which takes you to the test plan.

1997
Drive unit
01 - Self-diagnosis
F125 - Multi-function switch
F8 - Kick-down switch
F - Brake-light switch
G38 - Gearbox speed sender
G68 - Road speed sender
G69 - Throttle valve potentiometer
J217 - Automatic gearbox control unit
J226 - Relay for starter inhibitor and reversing light
N110 - Selector lever lock solenoid
Valve chest
self-diagnosis
Fig. 7-25 "Select function or component" mask, 4th level
The selected diagnosis object "F-brake-light switch" is adopted into the test plan.

1997
Saloon
System test plan
Engine - Start - starts up and cuts out again
- N18 - Exhaust gas recirculation valve
- Quantity injected
- J362 - Immobilizer control unit
Own test plan

=> F- Brake-light switch

self-diagnosis
Fig. 7-26 "Test plan" mask (based on symptom and function/component selection)
The further procedure continues as described in section 7.9.

7-28 C79298-A3238-X120-04-19
7.12 Documents
The "Documents" function can be reached from the "Function/component selec-

tion" mask by way of the "Go to" button. In the "Function/component selection"
mask, available documents, e.g. installation locations, pin assignments, etc., can
be selected and displayed.
Graphic documents are displayed in the work window. Text documents have a
vertical scroll bar.
Documents also appear in the function test masks. There they are offered directly
by way of labeled buttons.
Example of a mask sequence starting from "Function/component selection":

1997
Drive unit
01 Self diagnosis
Electrical components Automatic gearbox control unit
E45 - Cruise control system switch
F125 - Multi-function switch
F8 - Kick-down switch
F - Brake-light switch
F47 - Brake pedal switch
”Go to”
G38 - Gearbox destination
speed sender
G68 - RoadCancel
speed sender
G69 - Throttle
Exit valve potentiometer
G93 - Gearbox oil temperature
Vehicle system test sender
J217 - Automatic gearbox control unit
Documents
self-diagnosis
Fig. 7-27 Function/component selection, "Documents" selected as destination
You can call up the "Select documents" dialog box for a selected function or com-
ponent by way of the "Go to" menu.

C79298-A3238-X120-04-19 7-29

1997
Funktion bzw.
Select Bauteil auswählen
documents Limousine
Select
F125-Multi-function switch: Fitting location
DriveConnector
unit view
Automatisches Getriebe
01 Eigendiagnose
Elektrische Bauteile Automatisches Getriebe
E45 - Schalter für Geschwindigkeitsregelanlage
F125 - Multifunktionsschalter
F8 - K
Display Cancel

self-diagnosis
Fig. 7-28 "Select documents" dialog box
The displayable documents are listed in the "Select documents" dialog box.
Select the desired document, and choose the "Display" button. Then the docu-
ment is displayed.

Display documents Passat 1994>
1996
Estate
F125-Multi-function switch: Fitting location

self-diagnosis
Fig. 7-29 Document display
The displayed document may contain hotspots (rectangular sensitive areas). If you
touch a hotspot on-screen, the associated detail document will appear.

7-30 C79298-A3238-X120-04-19
7.13 Interrupt Guided Fault Finding
If you have entered the "Test plan" mask at least once, you can interrupt, save and
later reload the guided fault finding operation in order to continue your work.
You also have the option of interrupting your work for a short time and resume it
later without saving and loading.
Pause When you activate the "Interrupt" function, a dialog box appears in which you
can choose a short pause or a longer interruption. When you select pause, the fol-
lowing text appears:
Work has been interrupted
for a short time ("Pause").
Press "OK" to end pause.
Do not cancel pause without
consent or good reason.
By pressing the "OK" button:
Work can be continued in the current mask.
Interrupting and You can interrupt a diagnosis job and save all relevant diagnostic data. After sav-
Saving ing, you switch automatically to the initial guided fault finding mask (see
section 7.2).

C79298-A3238-X120-04-19 7-31
Example of a mask sequence: "Save diagnosis job" starting from a function test:
Select "Interrupt" in
the "Go to destina- Passat 1997>
tion" menu Function test
1998
F - brake-light switch Saloon
Establishment of test conditions
Ja
1Selector lever
”Gointo”position - P-
destination
2. Hand brake on! Hilfe zu 3
3. Fuse S20Interrupt
OK?
Hilfe zu 4
4. Earth connections
Cancel to gearbox OK? Block Circuit
Diagram
5. Switch onExit
ignition!
Vehicle system test
Fault memory contents
Complaint report
Are the testTest
conditions
plan established?
Function/component selection
Documents
Test step: Establishment of test conditions
Query: Establishment of test conditions
self-diagnosis
Fig. 7-30 "Go to" destination with selected "Interrupt" function
Select "Work inter-

ruption" Passat 1997>
Function test
1998
F - brake-light switch Saloon
Establishment of test conditions
Yes
1. Selector lever in position - P-
2. Hand brake on! Work interruption Help on 3
3. Fuse S20 OK? To interrupt work for a short period Help on 4

4. Earth connections toandgearbox OK?press "Pause"
then continue Block Circuit
Diagram
5. Switch on ignition! or to interrupt for a long period
and save all data press "Interrupt".
Are the test conditionsPause

established? Interrupt

self-diagnosis
Fig. 7-31 Function test, "Work interruption" dialog box

7-32 C79298-A3238-X120-04-19
Enter Ñ job code

1996
Enter job code Variant
F - brake-light switch AFN 1,9 Turbodieselmo / 92 kW
MAIER KA-KZ 344

0 1 2 3 4
5 6 7 8 9
A B C D E
F G H I J
K L M N O
P Q R S T
U V W X Y
C - Z Q
self-diagnosis
Fig. 7-32 "Enter job code" dialog box
With the "Enter job code" dialog box, you can use the on-screen keyboard to
enter a job code for a diagnosis job you want to save and quit with the "Q" button.
In addition to the code, the current date and time also are saved.
Loading A previously saved diagnosis job is loaded in the "Diagnosis job" mask. It can
only be selected in the second mask of the vehicle identification function, "Select
type", by selecting "Diagnosis job" from the "Go to" menu.
Select the desired job from a list of all saved diagnosis jobs. Then choose the
"Load" button. Before the diagnosis job is loaded, a prompt appears asking if the
diagnostic cable is connected. If you acknowledge the prompt with "OK", the
"Test plan" mask appears. It displays the saved status of the interrupted function
test. Choose the "Continue" button to start the interrupted function test.

C79298-A3238-X120-04-19 7-33
Example of a mask sequence "Load diagnosis job":
Select "Diagnosis
job" as "Go to"
destination" Vehicle identification
Select type
Golf 1998 >

Golf 1998 > USA/Canada
Passat 1997 >
Passat 1997 > -USA/Canada
”Go to” destination
Cancel
Exit
CD change
Diagnosis job
self-diagnosis
Fig. 7-33 "Select type" sub-mask, "Diagnosis job" selected as "Go to" destination

Diagnosis job Passat 1997>
1998
Edit/delete Saloon
interrupted job ADR 1,8l Motronic / 92kW
ABC-123 08.08.1997 09:43
A 56-78-97 MUE 16.07.1997 12:32
Edit Delete
Meßtechnik
Test Instruments Fahrzeug-
Vehicle Sprung
Go to Druck
Print Hilfe
Help
Eigendiagnose
self-diagnosis
Fig. 7-34 Diagnosis job, sub-mask "Edit/delete interrupted job"
Load the interrupted diagnosis job by choosing the "Edit" button.

7-34 C79298-A3238-X120-04-19
Establish conditi-
ons and press "OK" Passat 1997>
button Diagnosis job
1998
Edit/delete Variant
Jobjob
interrupted administration
ABC-123The vehicle belonging to09.12.1996
this job 09:43
A 56-78-97 MUE 16.12.1996 12:32
ABC-123 Passat 1997> 1998 Saloon
ADR 1,8l Motronic / 92kW 08.08.1996 09:43
must be connected to the diagnostic bus.
OK Cancel

self-diagnosis
Fig. 7-35 Diagnosis job, "Job administration" dialog box
When you choose the "OK" button you exit the dialog box and switch to the test
plan (see section 7.8).

C79298-A3238-X120-04-19 7-35
7.14 Diagnosis Log
If you have gotten as far as the "Test plan" mask at least once, you can print a log
of the guided fault finding operation via the "Print/Diagnosis log" function.
The diagnosis log contains the following information:
• Workshop code of the VAS 5051

• Dealership identifier
• Version of the currently installed VAS 5051 software system
• Identification characteristics
• Fault memory contents
• Executed work steps (completed masks)
• Test plan list, divided into system and own test plans
• List of the function tests with names and individual
test steps
• Executed test steps with all proposals and mechanics’ decisions, all measure-
ments and all vehicle system functions that lead to a result value as well as
the result of the test step itself
• Start and end / cancellations and interruptions / loading of a diagnosis job
7.15 Function Test Log
The "function test log" function is the same as the "diagnosis log" except that,
instead of the log data of all function tests, it contains only the data of the last test
carried out.

7-36 C79298-A3238-X120-04-19
Applications
8 Applications
8.1 Overview
The "Applications" mode provides you with applications for which the program
and data are accessed by inserting a CD in the drive.
Examples of future applications:
• Multimedia
• Bentley-CD
8.2 Start Application
Press the "Applications" button on the start mask.
VAS 5051
Version - GB - / V01.00 24/12/1999
Vehicle
self-diagnosis
Test Instruments
Guided
fault finding
Administration
Applications
Applications
Administration
Administration
Print Help
Fig. 8-1 "System start", "Applications" mask selected
A selection mask (fig. 8-2) appears with a list of the current published applicati-
ons.

C79298-A3238-X120-04-19 8-1
Applications
Applications
Selection mask
Select application
Multimedia
Start Bentley CD
Go to Print Help
Fig. 8-2 Selection mask, Applications (example)
Start application 1. Insert the CD for the application. Follow the instructions for use of the CD
drive given in section 2.1.2.
2. Select the application you want.
3. Press "Continue".
If the CD is inserted the application program on the CD will start.
8.2.1 Multimedia
In the "Multimedia" application you can run videos or slide presentations from
the CD. The image information is displayed on the touchscreen. The sound can
be heard at the audio output of the CD-ROM drive (fig. 2-5) via connected head-
phones or active speakers.
The following functions are provided:
• Display and selection of titles
• Start
• Resume, Stop, Cancel
• Help function
• Go to
• Print

8-2 C79298-A3238-X120-04-19
Applications
Insert a CD with multimedia data in "MPG" video format or "PPT" Powerpoint

format in the CD drive and from the selection mask (fig. 8-2) select the "Multi-
media" function.
Another selection mask appears with a list of the titles included on the inserted
CD.
Select title Select a title from the list. It is highlighted.
Start video Press "Continue". If a title has been selected the tester switches to the playback
mask, otherwise you are prompted to select one.
If the data carrier is faulty or the file is not in the correct format, there appears the
message:
Unable to play video.
In the video playback mask only data in MPG format are displayed. Powerpoint
presentations in PPT format use the Powerpoint Viewer.
Choose "Back" to cancel playback and call up the selection mask. As in other
modes, you can also exit playback by way of the Go to menu.
Choose "Stop" to stop playback and resume. You can interrupt playback to gener-
Stop
ate a screen dump or take a break, for example. The button label changes auto-
matically from "Stop" to "Resume".
The only print function available is "Screen". To generate a screen dump , stop
Print
playback, press the "Print" button and select "Screen". You can resume playback
when the hourglass symbol disappears.
Choose the "Help" button to call up help on the button and mask functions.
Help

C79298-A3238-X120-04-19 8-3
Applications

8-4 C79298-A3238-X120-04-19
Administration
9 Administration
9.1 Overview
The "Administration" operating mode provides no functions for fault finding on

vehicles. Rather, it is used for internal management of the tester. In this operating
mode, you can adapt the settings to your requirements.
The following functions are available:
• Installation of Ñupdates
• Self-test of test instruments and diagnostic bus
• Input of the workshop code or change of dealership identifier
• Setting and selection of the signal tone, date and time, output language and
initial graphic
• Information on an inserted CD
Input of workshop During initial startup, "Administration" is the only operating mode that can be
code activated after the tester starts. You must enter your workshop code to access the
other VAS 5051 operating modes (see chapter 3 and section 9.6). After entering
the workshop code once, only the dealership identifier can be changed with this
function.
1RWH
Later changes or deletions of an entered workshop code can be made only by

specially authorized personnel who have access to the "Expanded functions"
function (see section 9.9). Therefore, make sure to enter the correct code.

C79298-A3238-X120-04-19 9-1
Administration
9.2 Start Administration
"Administration" is activated in the start mask by choosing the "Administration"

button.
Fig. 9-1 Start of administration
If you choose this button in the start mask, the tester will offer a list of all acces-
sible functions (see fig. 9-1).

9-2 C79298-A3238-X120-04-19
Administration
9.3 Select Function
If you select the "Administration" button in the start mask (see fig. 9-1), the fol-
lowing mask will appear. It contains a list of all accessible functions in "Adminis-
tration" mode.

Administration VZ/Importer number: 678
Dealership number: 98765
Select V. A. G. Partner
function Siemensallee 50, 76187 Karlsruhe
Install update
Self-test
Enter workshop code
Signal generator
Date/time
Expanded functions
Select initial graphic
Contents list
Print format
Installation or update of ESIS
Activate Telediagnosis
Go to Print Help
Fig. 9-1 "Administration" mask, select function
You can select any function with the selection bar. This calls up a mask in which
you can edit the function.

C79298-A3238-X120-04-19 9-3
Administration
9.4 Install Update
You can load the contents of a newly distributed CD that contains an update of
the software into the tester with the "Install update" function. Insert the CD and
call up the function. The tester loads the new version from the CD to the hard
drive.
On devices with marque separation you can install new or additional marque-spe-
cific CDs on the VAS 5051 using this function.
1RWH
Marque-specific CDs always require a base CD to have first been installed on

the VAS 5051. Marque-specific CDs cannot run unless a base CD has previ-
ously been installed!
1. Insert the marque-specific CD you want to use in the CD drive. Follow the
instructions for inserting CDs given in section 2.1.2!
2. Confirm the security prompt to update or install the inserted marque-specific
CD.
3. The contents of the marque-specific CD are installed in the VAS 5051. An
on-screen progress indicator allows you to track the installation routine. As
soon as it is finished, the VAS 5051 quits "Administration" mode and brings
the Start mask back up (see fig. 3-11).
4. Remove the CD from the drive.
Install other marque-specific CDs as necessary by selecting the "Update-Installa-
tion" function again in "Administration" mode and repeating steps 1-4.
9.5 Self-test
Overview When you select the "Self-test" function from the function list, you can start an
integral self-test.
The test covers the two internal function units in the tester:
• Test Instruments
• Diagnostic bus
1RWH
The self-test of Test Instruments does not include the attached measuring leads.
For how to test them manually, see section 11.3.3.
The result is shown on-screen as an "OK/NOK list" (see fig. 9-2).

If "NOK" and a fault number appears after a test, call SIEMENS Service
(see section 11.4).

9-4 C79298-A3238-X120-04-19
Administration

Self-test VZ/Importer number: 678
V.A.G. Partner
Siemensallee 50, 76187 Karlsruhe
Test instrument unit OK
Diagnostic bus unit OK
Go to Print Help
Fig. 9-2 "Self-test" mask, both units OK
Test Instruments 1. In order to execute a self-test of the test instruments, select the "Test instru-
ment unit" line from the function list. The following request appears:
Disconnect all measuring leads from tester.
Confirm with the "OK" button when you have disconnected all measuring
leads from the tester.
1RWH
This prompt also appears when no measuring leads are connected to the tester.
In this case, just confirm with the "OK" button.
2. The self-test takes about 1 minute. During this time, no entries can be
made. The result of the self-test is shown in the right portion of the work win-
dow.
3. Reconnect all necessary measuring leads to the tester.

C79298-A3238-X120-04-19 9-5
Administration
Diagnostic bus 1. In order to execute a self-test of the diagnostic bus, select "Diagnostic bus
unit" in the function list. The prompt appears:
Disconnect diagnostic cable from tester.
Confirm with the "OK" button when you have disconnected the diagnostic
cable from the tester.
1RWH
This prompt appears even if no diagnostic cables are connected to the tester. In
this case, just confirm with the "OK" button.
2. After a few seconds, the following prompt appears:
Connect diagnostic cable to tester

(not connected to vehicle).
When you connect a diagnostic cable to the tester, leave the test probe wit-
hout contact.
3. The result of the self-test will appear in the right portion of the work window
after a few seconds.
1RWH
When a diagnostic cable is connected during a "Diagnostic bus" self-test, short-

circuits in the cable are detected. Further self-tests of the diagnostic cable are
not available.

9-6 C79298-A3238-X120-04-19
Administration
9.6 Enter Workshop Code/Change Dealership Identifier
Entry of the work- If you activate the "Enter workshop code" function from the function list in the
shop code (initial "Administration" mask during initial startup of the VAS 5051, you can enter your
startup) VZ/importer number, your dealership number and your dealership identifier. You
will find more information on initial startup of a new - or replaced - tester in
chapter 3.
Change dealership When the VZ/importer number and dealership number input has been confirmed,
identifier the data are blocked for the dealer. The next time the tester is switched on the
"Enter workshop code" function is replaced by "Change dealership identifier".
Only the dealership identifier can be changed subsequently
9.7 Signal Generator
The tester will emit a signal tone for certain events, e.g. the continuity test in the
test instruments or faulty entries on a virtual keyboard. You can set the duration
and tone pitch of this signal in the "Signal generator" function. The setting has no
influence on the "Battery low" alarm.
When you select the "Signal generator" function in the function list, the follow-
ing mask appears (see fig. 9-3):

Signal generator VZ/Importer number: 678
Adjust signal generator V.A.G. Partner
Siemensallee 50, 76187 Karlsruhe
760
0 3000
Duration [ms]
Tonhöhe
2000
0 4000
Tone pitch [Hz]
Go to Print Help
Fig. 9-3 "Signal generator" mask
You can change the signal tone with the two slide controls. The numerical values
above the slide control indicate the values just set.

C79298-A3238-X120-04-19 9-7
Administration
• With the top slide control labeled "Duration", you can change the time for
which the signal lasts. You can set values between 0 (far left setting) and
3,000 ms (far right setting).
• The bottom slide control labeled "Tone pitch" controls the frequency of the
signal tone. You can set values between 0 (far left setting) and 4.000 Hz (far
right setting).
As you move the slide control, the tester emits a signal tone at the last set tone
pitch/duration. When the setting has been made the signal is generated every time
the touchscreen is operated until the next time the device is switched off.
1RWH
The volume of the signal tone cannot be changed.
9.8 Date/time
When you select the "Date/time" function from the function list, the following
mask appears (see fig. 9-4):

Date/time VZ/Importer number: 678
Set correct V.A.G. Partner
date and time. Siemensallee 50, 76187 Karlsruhe
Date
Day Month Year
28 11 1997
07 7
Time
Hour Minute
Go to Print Help
Fig. 9-4 "Date/time" mask, setting the hour
Here you can set the date and time of the operating system to the appropriate val-
ues.
Date The date appears in the sequence: Day - Month - Year. If you press one of the but-
tons to the left and right of the date display, the date setting will change by one
day.

9-8 C79298-A3238-X120-04-19
Administration
The left button sets the date back one day.
The right button advances the date one day.
1RWH
You cannot set the month and year with the two settings buttons. The month and
year will change automatically if the date is changed to the beginning or end of a
month or year. Therefore, you must press the right button 365 times in order to
move the system date forward one year.
Time You can set the hour and minute independently of each other. Therefore, hours
and minutes are shown on two separately selectable buttons in the "Time" area.
Set hour If you press the "Hour" button, two additional buttons appear to the left and right
of the time display. You can use these buttons to set the hour display back or for-
ward one hour.
The left button sets the hour display back by one hour.
The right button advances the hour display by one hour.
Set minutes If you press the "Minute" button, two additional buttons appear to the left and
right of the time display. You can use these buttons to set the minute display back
or forward by one minute. You make the settings in the same way as for the hour
display.
Accept time display The newly set date and time settings are accepted into the operating system with
the "Back" button.
You can exit the mask with the "Go to" button without changing the system time.

C79298-A3238-X120-04-19 9-9
Administration
9.9 Expanded Functions
This function is only available when you use special key CDs that are not distri-
buted with the VAS 5051.
9.10 Select Initial Graphic
When you select the "Select initial graphic" function from the function list, you
can select from a list the graphic you want to appear in the start mask of the tester.
The list displayed on-screen shows the names under which the graphics are
saved.
Select a graphic with the selection bar and exit the function with the "Back" but-
ton. The selected graphic will appear as soon as you switch to the start mask.
9.11 Contents List
When you select the "Contents list" function from the function list, the mask dis-
plays information about the system installed from the CD.
The display shows:
• The version and creation date of the CD
• Informations about the vehicle data contained on the CD
Devices with marque separation display the base and marque-specific CDs instal-
led on the VAS 5051 with their respective versions in a follow-up dialogue box.
Select the CD on which you want more details. Then the relevant contents file is
displayed.
9.12 Print Format
When you select the "Print format" function, you can set the format for screen
dumps and log printouts to
• DIN A4 or
• US Letter
size. Insert the appropriate size in the tray and adjust the guides (see fig. 3-1 and
fig. 3-2).
At the next print job the printer will switch to the new format.

9-10 C79298-A3238-X120-04-19
Administration
9.13 Installation or update of ESIS
You can use this function to install a CD for the "Electronic Service Information
System" (only for the US market).
9.14 Activate telediagnosis
This function is preset for a future application.

When the option is selected the displayed entry in the function list switches to
"Deactivate telediagnosis".

C79298-A3238-X120-04-19 9-11
Administration

9-12 C79298-A3238-X120-04-19
Help
10 Help
10.1 Overview
In "Help" mode you can access context-sensitive or general operating hints and
explanations of function. "Help" does not replace the operating manual but it can
help you if you are uncertain how to use certain masks or buttons so that you
don’t have to look it up in the operating manual.
The help function is divided into two groups:
• Topics
• Buttons
10.2 Start Help
The "Help" button appears on every mask in the tester. It is always in the same
Help
place on the navigation bar. Press on it when you need more information about a
mask or a button.
The tester remains in "Help" mode as long as the "Help" button appears pressed.
You cannot change any settings or selections in this mode.
Exit "Help" mode by pressing on the "Help" button a second time.
Help Help
Help is open - the button is active Help is closed

C79298-A3238-X120-04-19 10-1
Help
10.3 Help Overview
The "Help overview" dialog box appears when you start "Help" mode. It contains
a list of one or more topics for which a brief explanation is available (see fig. 10-
1).
A selection bar highlights the current topic. You can move the bar to any entry in
the list; the selected topic will be opened once you activate the touchscreen.
Help overview
Use of buttons - press relevant button.
Other subjects - by selection from following list.
Press "Close" to display overlayed information.
Help on use of the mask

Help on test plan
Help on function test
Close
Fig. 10-1 Help overview in the "Test plan" mask, "Guided Fault Finding" mode
The "Close" button closes the "Help overview" so that you can see the buttons that
might be hidden behind it. However, the tester remains in "Help" mode.

10-2 C79298-A3238-X120-04-19
Help
10.4 Help on Topics
The help text that you are shown when you open a topic explains the options you
have in the current mask (for example, see fig. 10-2). There you can see what you
can do in the mask as well as the links to others masks.
Help on use of the mask

Use of buttons - press relevant button.
Press "Overview" to display the "Help Overview".
"Test Plan" Mask

This mask allows you to select and start test programmes.
The test results of tests already conducted are displayed
to the left of the test name.
The Test Plan is recomputed every time the mask is
accessed. Successful repairs and the deletion of fault
characteristics affect the sequence of the tests
Select test object:

VAS 5051 suggests the testing of a specific test object
indicated by dark background). To accept this
suggestion press "Continue" -
Overview Close
Fig. 10-2 Help on use of the "Test plan" mask, "Guided Fault Finding" mode
• The scroll bar on the right side of the dialog box can be used to scroll the text
up or down so that you can read the whole text.
• The "Overview" button returns you to the "Help overview ".
• The "Close" button closes the Help dialog box so that you can see the other
buttons that might be hidden behind it. However, the tester remains in "Help"
mode.

C79298-A3238-X120-04-19 10-3
Help
10.5 Help on the Selected Button
You can get help for any button in any mask.

Press any button while the Tester is in "Help" mode and a brief explanation of the
button’s meaning and use will appear on the mask (see fig. 10-3). Close the "Help
overview " window if you need to see the buttons behind it.
Help on button pressed

Press "Close" to display overlayed information.
Press "Overview" to display the "Help Overview".
"Test Instruments" button
Press this button to

start Test Instruments
Overview Close
Fig. 10-3 Help on the "Test Instruments" button
• The " Overview " button returns you to the "Help overview ".
• The "Close" button closes the "Help on button pressed" dialog box so that
you can see the buttons behind it. However, the Tester remains in "Help" mo-
de.
1RWH
No help is available for the "Overview" and "Help" buttons themselves.

10-4 C79298-A3238-X120-04-19
Troubleshooting
11 Troubleshooting
The VAS 5051 was tested before being shipped. Selected components and adhe-
rence to specified quality controls guarantee that the VAS 5051 will be extremely
dependable. However, if a problem should arise, consult the notes in this chapter
before you contact Customer Service.
11.1 Classification
Trouble that the VAS 5051 may have can be classified into the following groups:
• Trouble stemming from ambient influences: ambient temperature, (extreme)
humidity, dust, soot, grease, sparking, power supply, transformers, large
electric motors, two-way radio equipment, vibration
• Trouble in the VAS 5051: tester, battery, workshop trolley, power distributi-
on on the workshop trolley, measuring leads, printer, IrDA adapter.
Try to identify the problem and localize it if possible. Try the suggested solutions
and carry out all the measures listed.
If the problem cannot be solved with the solutions provided, follow the instruc-
tions in section 11.4.

C79298-A3238-X120-04-19 11-1
Troubleshooting
11.2 Self-test
11.2.1 Self-test for Computer Hardware
1RWH
The computer is tested every time the VAS 5051 is powered up. The tester is
ready for use when the start mask is displayed and when the touchscreen is
active.
If error messages appear after this self-test, contact Customer Service. See
section 11.4.
11.2.2 Self-test of the Test Instrument and the Diagnostic Bus Unit.
See section 9.5.

If error messages appear after this self-test, contact Customer Service. See
section 11.4.
11.3 Symptoms, Causes and Solutions
11.3.1 Computer
Table 11-1 Computer error messages
Symptom Possible causes Solution
The system stops Internal error. Switch the tester off and back
responding. Touchs- on again.
creen cannot be used to
operate the system.
Battery not working. Battery defective Replace the battery as shown

in section 12.2.3.
Error message: Non- Diskette in the disk Remove the disk. Switch the
System disk or disk drive when the tester off and back on again.
error. Replace and tester is switched
strike any key when on.
ready.
Error message: Fatal System error. Switch the tester off. Send a
Error fault report fax to SIEMENS
as shown in section 11.4.
Red LED lit, tester swit- Tester overheating. Clean the air filter as shown
ches off after 10 s. in section 12.2.4.

11-2 C79298-A3238-X120-04-19
Troubleshooting
Printer driver
Fig. 11-4 Printer driver
If you get this message, carry out the checks in the order given below and rectify
the problem. Then press the "Retry" button. If you are unable to rectify the prob-
lem, follow the instructions in section 11.3.4. If you press "Cancel", the print job
will be deleted.
1. Is there an object in the IrDA interface (fig. 2-20)?
2. Is the IrDA adapter (fig. 2-20) in its fixture?
3. Is the printer switched on (7, fig. 2-18)?
4. Is the Centronics connector (fig. 2-19) properly connected to the printer?
5. Is the "Ready" indicator lit(fig. 2-22)? If not, press the ONLINE button
(fig. 2-22).
11.3.2 Test Instruments
Table 11-2 Test Instruments error messages
Error message: Measu- Fuse for inline cur- Replace the fuse on the top of
ring lead not properly rent is defective. the tester as shown in
connected or fuse section 12.2.5.
defective.
Temporary over- Press the "Repeat" button. If
load, due to induc- another error message
tive load for appears, press the "Cancel"
example. The inter- button.
nal indestructible
electronic fuse has
tripped.
The U/R/D lead is Plug the lead into the correct

still plugged in at socket.
position "U/R/D".
In the resistance or con- A voltage is being Shut off the external voltage
tinuity test the error applied to the com- source.
message: Measure- ponent under mea-
ment error: external surement.
feed occurs.

C79298-A3238-X120-04-19 11-3
Troubleshooting
1RWH
The self-test for the test instruments does not include the measuring leads. They
must be checked by means of the tests described in this section.
Before beginning a test of the measuring leads, you should perform the self-test
for "Test Instruments" to exclude the possibility of a fault in the instrument. See
section 9.5.
Some key error messages of the VAS 5051 are listed in the following table. If you
identify a defect or if the measuring lead does not work despite a clean test, con-
tact Customer Service.
Table 11-3 Measuring lead error messages
Error message: Dia- Diagnostic cable not con- Connect the tester to the
gnostic bus faulty in nected correctly or defec- vehicle via the diagnostic
vehicle self-diagnosis tive. cable. Repeat the function
and guided fault fin- test.
ding.
ÑInline current mea- The U/R/D measuring Plug the measuring lead
surement not possible. lead is still plugged in at into the correct socket.
position "U/R/D".
Fuse defective. Replace the fuse as shown

in section 12.2.5.
Temporary overload, due Press the "Repeat" button in

to inductive load for the dialog box. If another
example. The internal error message appears,
indestructible electronic press the "Cancel" button.
fuse has tripped.
Error message: Test During calibration of the Connect the test probes and
probes not connected inline current measure- recalibrate.
in inline current mea- ment, the test probes of
surement. the COM measuring lead
and the U/R/D measuring
lead were not intercon-
nected.

11-4 C79298-A3238-X120-04-19
Troubleshooting
U/R/D measuring A function test of the U/R/D measuring lead and the COM measuring lead is per-
lead and COM formed as follows. If the test results do not conform to the required values, there
measuring lead is a fault in the lead concerned. In this case, send a fault report as shown in
section 11.4.
1. Connect the measuring leads to the tester.
2. Activate the "Resistance U/R/D" button in the "Multimeter" mask in "Test
Instruments" mode. Select automatic measurement range selection (see
section 6.3).
3. If the test probes of the two measuring leads are not contacting, the following
result should be displayed:
+++++ MΩ.
4. Now short the connection between the two test probes. The displayed result
must be ≤ 10 Ω. If it is not, at least one of the measuring leads is probably
defective.
Measure the line resistance to determine which of the measuring leads is defec-
tive:
1. Disconnect the COM measuring lead from the "COM" socket.
2. On the screen, manually select the measurement range "0 .. 10 Ohm" (see
section 6.3). The following prompt appears in a dialog box:
To calibrate connect U/R/D and COM test probes together.
3. Plug the test probe of the U/R/D measuring lead into the "COM" socket and
press the OK button. The displayed measured value must be ≤ 0.03 Ω.
4. Check the freeze frame selection by pressing the button on the test probe. The
measured value is frozen, the on-screen "Freeze frame" button must appear
pressed.
5. Remove the U/R/D measuring lead and reconnect the COM measuring lead
again. Plug the safety test probe into the "U/R/D" socket. The displayed mea-
sured value must be ≤0.03 Ω.

C79298-A3238-X120-04-19 11-5
Troubleshooting
DSO measuring A function test of the DSO measuring leads is performed as follows. If the test
leads results do not conform to the required values, there is a fault in the DSO measur-
ing lead concerned. In this case, send a fault report as shown in section 11.4.
1. Connect a DSO measuring lead to the DSO1 socket.
2. Touch the "Voltage DSO1" button in the "Multimeter" mask in "Test Instru-
ments" mode. Select the "Direct voltage" measurement type and automatic
measurement range selection (see section 6.3).
3. Connect the test probes of the DSO measuring lead to a charged auto battery.
The displayed measured value must correspond to the battery voltage (bet-
ween 11 and 14 V).
4. Check the freeze frame selection by pressing the button on the test probe. The
measured value is frozen, the on-screen "Freeze frame" button must appear
pressed.
Now perform a comparative test between U/R/D and DSO:

1. Unfreeze the freeze frame by touching the button again to resume the measu-
rements.
2. Also connect the U/R/D measuring lead and the COM measuring lead to the
tester and the auto battery. You should first check the proper function capa-
bility of both measuring leads.
3. Touch the "Voltage U/R/D" button. Select the "Direct voltage" measurement
type and automatic measurement range selection (see section 6.3).
4. The difference between the measured values should be ≤ 0.2 V in both the
displayed measurement functions (DSO1 and U/R/D).
Repeat the function test with the second DSO measuring lead.
1RWH
Both the DSO measuring leads are identical and can be interchanged for testing.

11-6 C79298-A3238-X120-04-19
Troubleshooting
Current pick-up 50 A A function test of the current pick-up 50 A is performed as follows: If the test
results do not conform to the required values, there is a fault in the current pick-
up. In this case, send a fault report as shown in section 11.4.
1. Connect the current pick-up 50 A to the tester.
2. Touch the "Current 50A current pick-up" button in the "Multimeter" mask in
"Test Instruments" mode. Select the "Direct current" measurement type and
automatic measurement range selection (see section 6.3).
3. Open and close the current pick-up several times without connecting it to a
live electrical cable. The measured value must change significantly between
the two conditions. When the pick-up is open, this message appears in the
display window at the top right:
Current pick-up not closed.
Check the calibration of the current pick-up:

1. Press the "Calibrate" button on the screen. Ignore the message in the dialog
box which appears, and press the "OK" button to close it. The measured value
displayed must now be ≤ 0.05 A.
2. Connect the current pick-up to a battery cable or another cable of a power
consumer in a vehicle. All consumers and the vehicle ignition should be off
initially. The displayed measurement result must be ≤ 1 A.
Perform a comparative test:

1. Switch on a < 50 A consumer, such as the parking lights. The current con-
sumption should be as exactly known as possible. Use this as an empirical va-
lue. The measured value must match the empirical value.
2. Disconnect the current pick-up from the live cable, rotate it through
180 degrees and reconnect it. The difference in measured values must be
≤ 0.5 A, but the preceding sign must be inverted.

C79298-A3238-X120-04-19 11-7
Troubleshooting
Current pick-up 500 A function test of the current pick-up 500 A is performed as follows: If the test
A results do not conform to the required values, there is a fault in the current pick-
up. In this case, send a fault report as shown in section 11.4.
1. Connect the current pick-up 500 A to the tester.
2. Touch the "Current 500A current pick-up" button in the "Multimeter" mask
in "Test Instruments" mode. Select the "Direct current" measurement type
and automatic measurement range selection (see section 6.3).
3. Open and close the current pick-up several times without connecting it to a
live electrical cable. The measured value must change as the condition chan-
ges.
Check the calibration of the current pick-up:

1. Press the "Calibrate" button on the screen. Ignore the message in the dialog
box which appears, and press the "OK" button to close it. The measured value
displayed must now be ≤ 0.5 A.
2. Connect the current pick-up to a battery cable or another cable of a power
consumer in a vehicle. All consumers and the vehicle ignition should be off
initially. The displayed measurement result must be ≤ 5 A.
Perform a comparative test:

1. Switch on a heavy power consumer, such as the lights and the heated rear
window. The current consumption should be as exactly known as possible.
Use this as an empirical value. The measured value must match the empirical
value.
2. Disconnect the current pick-up from the live cable, rotate it through 180 de-
grees and reconnect it. The difference in measured values must be ≤ 5 A, but
the preceding sign must be inverted.

11-8 C79298-A3238-X120-04-19
Troubleshooting
Trigger pick-up and The only way to check these two pick-ups is together. The function test is per-
kV pick-up formed as follows: If the test results do not conform to the required values, there
is a fault in one of the pick-ups. In this case, send a fault report as shown in
section 11.4.
1. Connect the trigger pick-up and the kV pick-up to the tester.
2. Call up the "DSO" mask in "Test Instruments" mode (see section 6.4).
3. Connect both pick-ups to a vehicle with a 4- or 6-cylinder engine by the same
ignition cable (secondary side of the ignition coil).
4. Press the "Default measurement" button in the "DSO" mask. Select the "Ca-
ble test kV TZ" curve in the selection box that appears, then press the "Dis-
play" button to confirm. The "DSO" mask appears with the target curve in the
background. At the same time all of the DSO settings are performed automa-
tically.
5. Start the vehicle’s engine. The typical ignition signal similar to the target cur-
ve must be dynamically displayed – that is, the mask is refreshed once or
twice per second if the kV pick-up and the trigger pick-up are fault-free.
If the trigger pick-up is defective, this message appears in the box at the top right:
No trigger.
If the kV pick-up is defective, you may see only a horizontal line or a measure-
ment curve with a much too low amplitude.
1RWH
Depending on the vehicle, the amplitude of the ignition signal can fluctuate
between 4 and 40 kV. The sparking voltage is typically between 600 and 1200 V,
the combustion period may be between 2 and 6 ms. The shape of the curve may
vary depending on ignition coil manufacturer.

C79298-A3238-X120-04-19 11-9
Troubleshooting
1RWH
The diagnostic cable and diagnostic adapter function tests described below may
only be performed on fault-free vehicles, to ensure that tests return logical
results.
3 meter, 5 meter dia- The function test of a diagnostic cable is performed as follows:
gnostic cable
If the test results do not conform to the required values, there is a fault in the
diagnostic cable. If this is the case, you should send a fault report as shown in
section 11.4.
1. Connect the tester to a vehicle by the diagnostic cable.

2. Switch to "Vehicle self-diagnosis" mode and select the "Engine electronics"
vehicle system (see section 5.3).
3. Switch the ignition on. If the connections are working data on the vehicle sy-
stem variant will be displayed on the right side of the mask after a few secon-
ds. If there is a break in the K-wire or the L-wire, the following message
appears in the top left corner of the mask.
Vehicle not available.
If there is a break in the supply wire in a 3 meter diagnostic cable, this message
appears:
No voltage or voltage too low on diagnostic bus.
1RWH
When testing the 3 meter diagnostic cable, the tester should always be powered
by way of the diagnostic cable from the vehicle electrical system (no mains
power connection to the tester) so that the supply leads to the tester can also be
tested. If the top LED on the tester is lit up in green, the connection is OK. If the
LED is lit up or flashing yellow, the cable is defective.

11-10 C79298-A3238-X120-04-19
Troubleshooting
Diagnostic adapter A diagnostic adapter function test is performed as follows:

If the test results do not conform to the required values, there is a fault in the
diagnostic adapter. If this is the case, you should send in a fault report as shown
in section 11.4.
1. Connect the tester to a vehicle via a fault-free 3 meter diagnostic cable and
the diagnostic adapter.
2. Switch to "Vehicle self-diagnosis" mode and select the "Engine electronics"
If there is a break in the supply wire in the diagnostic adapter, this message
appears:

C79298-A3238-X120-04-19 11-11
Troubleshooting
Diagnostic cable LT A diagnostic cable LT function test is performed as follows:

1. Connect the tester to a vehicle via the diagnostic cable LT.
2. Switch to "Vehicle Self-Diagnosis" mode and select the "Engine electronics"
If there is a break in the supply wire in the LT diagnostic cable, this message
appears:
If the measurement results do no conform to the required values, there is a fault in
the diagnostic cable LT. If this is the case, you should send in a fault report as
shown in section 11.4.

11-12 C79298-A3238-X120-04-19
Troubleshooting
11.3.4 Printer
Paper jam Paper may get jammed at different points along the paper path in the printer. If
there is a paper jam, the printer will return an error message localizing the paper
jam. Possible error messages are listed in the following table:
Table 11-4 Paper jam
Printer error message Cause
BIN1 INPUTJAM Paper jam in the paper feed
BIN1 PAPERJAM Paper jam downstream of the paper feed.
OUTPUTJAM Paper jam at the paper output.
Paper feed jam To clear a jam in the printer’s input area:

1. Remove the paper cassette from the printer as shown in section 4.5.
2. Remove the sheet from the printer and check the sheets still in the cassette.
Remove any creased sheets and straighten the stack of paper.
3. Replace the paper cassette.
4. Press both the release buttons (see fig. 2-18) then open and shut the printer
casing briefly to signal to the printer that the offending sheet has been remo-
ved.
Printing resumes.
Paper jam downst- To clear the paper jam:

ream of paper feed
1. Press both the release buttons and open the printer casing.
2. Remove the drum unit as shown in section 12.5.2 and carefully remove the
paper from the printer.
3. Pull the paper toward you and the front of the printer, away from the paper
feed direction. Also check the output area and the paper feed.
4. Replace the drum unit as shown in section 12.5.2.
5. Make sure that the remaining sheets or envelopes are not creased or misali-
gned.
6. Close the printer casing; the print job resumes.
Output Jam To clear a paper jam in the output area:

1. Press both release buttons and open the printer casing to make it easier to re-
move the sheet from the paper output area.
2. Remove the jammed paper carefully from the printer.
Shut the printer casing until both sides lock in.

C79298-A3238-X120-04-19 11-13
Troubleshooting
Toner If there are areas of faded print or if the print quality diminishes, the toner cartridge
is empty. A sensor in the printer reacts when the toner is used up. When this hap-
pens, the display panel shows the message "TONER" or "T.OUT". Replace the to-
ner as soon as possible, as shown in section 12.5.1.
Drum If the Error message "DRUM?" appears in the display panel, the image drum unit
is not installed correctly. Remove the drum unit from the printer and put it back in
as shown in section 12.5.2. Pay careful attention to the instructions given there re-
garding handling of the drum unit.
Printing a test page Switch the printer to OFF-LINE status by pressing the ON-LINE button. Then
press the FORM FEED/Print Demo button until the message "PRINTING DE-
MO" appears in the display. The test page is printing. Finally, switch the printer
back on again (ON-LINE).
IrDA adapter If the LED of the IrDA adapter does not behave as described in section 2.2.5, try
the following:
1. Make sure the printer is switched on.
2. Check the IrDA adapter to make sure it is correctly seated on the tester and
printer sides (see fig. 2-20).
If you cannot solve the problem, you should send in a fault report as shown in
section 11.4.

11-14 C79298-A3238-X120-04-19
Troubleshooting
11.4 Fault Reports to Customer Service
If the problem cannot be fixed, please contact Customer Service. table 11-5 indi-
cates who you should contact. Lists of authorized service centers are given in
chapter 14.
1RWH
The fastest way to send your fault report to Customer Service is by fax. Use a
copy of the fault report form contained in the chapter 14 and send it to the fax
number for your authorized Customer Service Center which you will find in
chapter 14. Describe the fault characteristics (message, etc.) as precisely as pos-
sible, when it occurred and what you were doing when it occurred, what you
have done to localize the problem (section 11.3) and the results of your actions.
Table 11-5 Contacts
Component/Subject Contact
Tester SIEMENS
Workshop trolley SIEMENS
Measuring leads SIEMENS
Operating manual SIEMENS
Printer SIEMENS
Operating problems SIEMENS
Unidentifiable problem SIEMENS
Using the VAS 5051 on the SIEMENS

vehicle
Printer consumables (drum unit Your local OKI distributor or OKI

and toner cartridge)

C79298-A3238-X120-04-19 11-15
Troubleshooting
11.5 Exchanging Components
11.5.1 Tester
If the tester (not including the power cable) needs to be exchanged, you will
receive a replacement machine in a special container that you must use to return
the defective machine.
Leads Defective measuring leads are replaced complete. If you have to exchange the
power cable, please read the assembly instructions in section 3.2.
Battery Switch the tester off and remove it from its mounting on the workshop trolley as
shown in section 4.3.
Exchange the battery as shown in section 12.2.3.
Dispose of the old battery in accordance with your local waste disposal regula-
tions.
IrDA adapter The cable for the IrDA adapter is attached to the workshop trolley by a strain
relief tie which is not included with a replacement part.
1. Remove the IrDA adapter from the workshop trolley by pulling it out to the
open side of its fixing.
2. Pull the cable on the workshop trolley from the duct on the side member
(keep the rubber parts).
3. Remove the round plastic cap from the side panel behind the right side mem-
ber of the trolley.
4. Detach the Centronics connector from the printer.
5. Remove the IrDA adapter.
Mount the new IrDA adapter by carrying out steps 1 to 5 in reverse order.
The workshop trolley is not a replaceable part. However, you can order parts to
repair the Workshop trolley as shown in the appendix: "Parts List VAS 5051".

11-16 C79298-A3238-X120-04-19
Troubleshooting
11.6 Parts List
11.6.1 Contents
During the warranty period, we will repair the VAS 5051 by exchanging defined
components. Your local Customer Service representative will be able to tell you
which component needs to be replaced when you have sent in your fault report.
The warranty guarantors will then send you one or more replacement parts.
Exchange parts, Some components of the VAS 5051 are exchange parts that you must return in
consumables, exchange for a new component. We will give you the address to which the defec-
repair parts tive exchange part should be sent if needed.
You can dispose of consumables yourself. Please follow your local waste dis-
posal regulations.
You can order repair parts from the supplier and then perform the exchange on
your own.
The appendix to this chapter lists all the exchange parts and indicates whether the
item is an exchange, a consumable or a repair part.
In critical cases the guarantors may also demand the return of parts not normally
subject to mandatory return.
Appendix to the Chapter: "Parts List VAS 5051"

C79298-A3238-X120-04-19 11-17
Appendix to Chapter "Troubleshooting"
Parts list VAS 5051
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C79298-A3238-X120-04-19 Page: 1
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C79298-A3238-X120-04-19 Page: 2
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Symbol Meaning Symbol Meaning
l Standard A Replacement part
m Accessory E Consumer unit
- Not available R Repair part

C79298-A3238-X120-04-19 Page: 3
7. Diagnostic cable 5 m 18. kV pick-up

8. Combo diagnostic cable 5 m
9. Diagnostic cable 3 m
10. Combo diagnostic cable 3 m
11. Diagnostic adapter 19. Trigger pick-up
12. Diagnostic cable LT
13. U/R/D measuring lead
14. COM measuring lead
15. DSO measuring lead
DSO 2
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C7 za
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C79298-A3238-X120-04-19 Page: 4
Note
35
Instructions for removal and replacement are delivered with the replacement
36 parts for the workshop trolley (No. 26 - 41).
35
36
35
42
31
30
32
35
35 35
35
40 40
33 41 34
Figure 11-6 Workshop trolley with index to parts list; 33-34, 39-41 shown above

C79298-A3238-X120-04-19 Page: 5
Care and Maintenance
12 Care and Maintenance
12.1 Visual Check of the VAS 5051
You should carry out a visual check of the VAS 5051 on a regular basis. Check all
parts for damage (e.g. fractures) and dirt contamination.
Check the touchscreen carefully for damage or dirt. Clean as shown in
section 12.2.1 as necessary.
Regularly check all cables for damage.
&DXWLRQ
Always replace damaged cables.
12.2 Tester
If the casing is dirty, clean it with a non-fluffing damp (not wet!) cloth.
&DXWLRQ
Before cleaning the tester, as a safety measure switch it off and unplug it!
Unplug all measuring leads. Be sure that no liquid gets into the casing. Do not
try to clean the internal parts of the CD and floppy disk drives.
If the tester is damaged, contact the SIEMENS hotline (see section 14.2).

C79298-A3238-X120-04-19 12-1
12.2.1 Cleaning the Touchscreen
The most sensitive component of the tester is the touchscreen. Its sensitivity to
touch can be reduced by dirt or scratches. If it is dirty, clean it with a soft (as far
as possible non-fluffing) cloth. If this fails to remove the dirt, you can use isopro-
pyl alcohol or ammonia-free glass cleaner.
12.2.2 Forming the Battery
The battery has a typical lifespan of approx. 500 charge/discharge cycles. This
can only be achieved if – whenever possible - you discharge the battery fully in
every cycle, and if you form the battery once a month (that is, run it down and
recharge it).
The battery should also be formed if the VAS 5051 has not been used for a long
period of time, because the battery will self-discharge during that time.
To form the battery:
1. Disconnect the mains power from the tester without switching it off.
2. Leave the tester on until all the LEDs go out: the battery is now discharged.
3. Switch the tester off.
4. Plug it in to the mains to recharge the battery. It takes about 2 hours to charge
it completely.
If the standby runtime of the battery falls below 30 minutes even after being
formed repeatedly, it must be replaced.
&DXWLRQ
Always replace a defective battery with a new battery. Never operate the unit
without an installed battery.

12-2 C79298-A3238-X120-04-19
12.2.3 Changing the Battery
You can find the order number and supplier of this consumable in section 11.6.
Change the battery as shown below:
1. Switch the tester off properly and unplug the power cable.
2. Lay the tester down on a level, clean, open surface with the screen facing
down so that it cannot be damaged.
3. Open up the quick-release screw (fig. 12-1) using a slotted screwdriver
(turning no more than 90° counterclockwise!).
4. Lift the cover of the battery compartment and take it off.
Quick-release screw for the

battery compartment
Fig. 12-1 Opening the battery compartment
5. Push the black plastic foam pad in the battery compartment to the left and re-
move
6. Disconnect the connector from the battery cable. Press down the retaining
spring in the middle of the two connector sections with your thumbnail and
pull the sections apart (see fig. 12-2).
press here
Fig. 12-2 Detaching the connector from the battery cable

C79298-A3238-X120-04-19 12-3
7. Replace the old battery with a new one.

8. Reconnect the connector. The plug must engage in the socket.
9. Replace the plastic foam padding in the compartment
10. Store the connecting cable with the connector in the battery compartment.
11. Take the cover and position it with its back edge under the panel of the sheet-
metal casing. Close down the quick-release screw (fig. 12-1) using a slotted
screwdriver (turning no more than 90° clockwise!).
1RWH
Dispose of the battery in an environmentally friendly way.
12.2.4 Changing the Air Filter
If the red LED signals overheating, and in any case at least every three months,
the air filter must be changed as a preventive measure.
1. Turn the tester off properly and unplug the power cable.
2. Lay the tester down on a level, clean, open surface with the screen facing
down so that it cannot be damaged.
3. Open up the quick-release screw(fig. 12-3) using a slotted screwdriver
(turning no more than 90° counterclockwise!).
Quick-release screw
for the air filter
Fig. 12-3 Removing the air filter
4. Remove the cover.

5. Pull out the filter.

12-4 C79298-A3238-X120-04-19
6. Install the new filter.

7. Take the cover and position it with its back edge under the panel of the sheet-
metal casing. Close down the quick-release screw (fig. 12-3) using a slotted
screwdriver (turning no more than 90° clockwise!).
8. Switch on the tester.
If the red LED remains on, there is probably a fault. Send a fault report to the SIE-
MENS Service Center (see section 11.4).
12.2.5 Changing the Fuse for Inline Current Measurement
The fuse on the top side of the tester breaks the current when the inline current
measurement rises above 10 A. A replacement fuse is included with the tester
when it is shipped.
To change the fuse:
1. Unscrew the cap from the fuse box (see fig. 12-4 ). The fuse is in the cap.
2. Remove the defective fuse.
Cap of the
Fuse Box
Fig. 12-4 Removing the fuse
&DXWLRQ
Replace a defective fuse only with the original fuse included with the tester.
Damage resulting from incorrect replacement fuses is not covered under the
warranty.
3. Place the new fuse in the cap.

4. Screw the cap back into the fuse box.

C79298-A3238-X120-04-19 12-5
The workshop trolley is maintenance-free.
12.4 Measuring Leads
Check all measuring leads for damage on a regular basis. Replace damaged leads.
12.5 Printer
Care and maintenance of the printer generally relates only to cleaning and con-
sumption of toner and the drum unit. You do not need to grease or oil the printer
mechanism.
The drum is a highly sensitive component. It has been protected against damage
as much as possible. Nevertheless, you must handle it with the greatest possible
care to keep it functioning properly.
&DXWLRQ
Do not touch the green surface on the drum.

Do not expose the drum to light for more than five minutes.
Protect the drum against scratching.
&DXWLRQ
The heating unit within the printer gets very hot during printing. You may burn
your hands if you touch it. Wait until the heating unit has cooled before opening
the printer casing.
&DXWLRQ
Toner should not get on skin or clothing. If this does happen, use only cold
water to remove the toner. Hot water could cause the toner to stick to skin or
clothing.

12-6 C79298-A3238-X120-04-19
12.5.1 Changing the Toner Cartridge
You can find the order number and supplier of the end-user part in section 11.6.
Change the toner cartridge as follows:
open it upward.
2. Pull the blue plastic catch on the right side of the toner cartridge toward you
to release it (see fig. 12-5). Lift out the toner cartridge.
Fig. 12-5 Catch on toner cartridge
3. Unpack the new cartridge. Sealing tape on the underside of the cartridge pre-
vents toner from running out. Remove the entire length of the tape.
4. With the opening facing down, insert the toner cartridge into the left side of
the cartridge tray in the drum unit. The blue catch on the toner cartridge must
be on the right. Press it into the tray until it lies flat in the printer.
5. Using a little bit of force, move the blue catch back all the way to lock the
toner cartridge in the printer.
6. Clean the LED array as shown in section 12.5.3.

C79298-A3238-X120-04-19 12-7
12.5.2 Changing the Drum Unit
If you see the message "Drum?" in the display field or if the print quality dimin-
ishes, the drum unit should be changed at the next opportunity.
You can find the order number and supplier of this consumable in section 11.6.
Exchange the unit as follows:
open it upward.
Fig. 12-6 Removing the drum unit
2. Holding the drum unit at the front, lift it out of the printer together with the
toner cartridge (see fig. 12-6).
3. Unpack the new drum unit, remove the foam packing and the white protecti-
ve paper stuffing. Keep the foam packing in case you need it for transporta-
tion.
4. Install the new drum unit. It must lie securely and level in the recess provided.
5. Install the toner cartridge as described in section 12.5.1.

12-8 C79298-A3238-X120-04-19
6. Close the cover so that the release buttons lock.

7. Reset the drum unit counter:
− Hold down the "Menu 1/Menu 2" button on the button panel while swit-
ching on the printer. The message "SERVICE1" appears in the display pa-
nel.
− Press the "Menu 1/Menu 2" button three times. The function "RESET
DRUM" must appear in the display field.
− Press the "Enter" button. After a short time, you see "ON-LINE HP4" in
the display field.
8. Pack the old drum in the packing material of the new one and return it to your
supplier. The drum will be recycled.
If the drum is not installed correctly, the printer will show this in the display field
with the message "DRUM?".
12.5.3 Cleaning the LED Array
The LED array on the underside of the cover can become dirty when changing
toner cartridges, or simply over time. Clean it as needed, but especially after
changing the toner cartridge, using the cleaning cloth included with every new
toner cartridge (see fig. 12-7). You can also use a soft, non-fluffing cloth and a
cleaning agent such as isopropyl alcohol, for example.
&DXWLRQ
The LED array may be damaged if you use an unsuitable cleaning agent.
Fig. 12-7 Cleaning the LED array

C79298-A3238-X120-04-19 12-9
12.5.4 Cleaning the Drum
If unused toner has settled on the drum, you can remove it using an internal
cleaning procedure.
1. Switch the printer off-line by pressing the ON-LINE button.
2. Hold down both the DQG buttons simultaneously for more than
two seconds until you see this message in the display field: "Clean, Add A4
Paper Manually".
3. Open the manual paper feed by pressing on the two markings and pulling it
down.
Fig. 12-8 Inserting a sheet in the manual paper feed
4. Insert a DIN A4 sheet of paper in the manual paper feed. The printer draws it
in automatically (see fig. 12-8). In the display panel you see the message
"CLEAN PRINTER".
The excess toner will come off on the cleaning sheet unevenly and the printer
will print the words "The drum unit has been cleaned".
5. After the page has come out, switch the printer back on-line by pressing the
ON-LINE button.
&DXWLRQ
You cannot clean the drum by hand.

12-10 C79298-A3238-X120-04-19
12.5.5

C79298-A3238-X120-04-19 12-11
12.5.6 Cleaning the Printing Mechanism
To ensure that your printer operates smoothly, you should clean the printing
mechanism as needed (at least every six months).
1. Remove the drum unit as shown in section 12.5.2. Pack it so that it is not ex-
posed to any light.
2. Remove any leftover paper or dust with a soft brush or pencil brush. Do not
use any solvents or strong cleaning agents.
3. Excess toner residue can only be removed with a vacuum cleaner fitted with
a microfilter. Household vacuum cleaners should not be used.
4. Refit the drum unit as shown in section 12.5.2.
12.5.7 Printer Settings
The printer is customized for use with the VAS 5051 tester and is configured be-
fore being shipped. The settings are given in the appendix to this chapter.
12.6 Calibration
According to ISO 9000 ff., the accuracy of all measuring devices affecting the
quality of a task performed - in this case a maintenance and repair task - must be
calibrated periodically.
The tester together with the measuring leads is calibrated for three years (see cer-
tificate, chapter 1). After that the calibration must be repeated every two years.
Please contact your representative before this time runs out.
Appendix to the Chapter: "Printer Settings"

12-12 C79298-A3238-X120-04-19
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Technical Data
13 Technical Data
13.1 Vehicle Diagnostic, Testing and Information System

VAS 5051 with Workshop Trolley
Dimensions (W x D x H) 735 x 760 x 1.340 mm

Total weight 66 kg without packaging
72 kg with packaging
Total
electrical connected loads
Name plate on the 200 to 240 V / 4 A / 50/60 Hz
workshop trolley
VAS 5051/
230-V version
Name plate on the 100 to 120 V / 9 A / 50/60 Hz
workshop trolley
VAS 5051/
120-V version
13.2 Tester
13.2.1 Operating Data
Dimensions (W x D x H) 380 x 310 x 110 mm

Weight 9 kg
Ambient conditions
Operation Ambient temperature +5 to +45 °C
Relative humidity 10 to 90 %,
non-condensing
Transportation and storage Ambient temperature -20 to +60 °C
non-condensing
AC power supply The tester is generally supplied from the AC
system. The battery is always charged from the
AC system.
Rated effective range Voltage range 1 90 to 132 V

(static) Voltage range 2 180 to 264 V
Mains frequencies fN 50 Hz, 60 Hz
Frequency range fN ±3 Hz

C79298-A3238-X120-04-19 13-1
Technical Data
Power supply from the vehicle The tester can be powered from the vehicle
electrical system electrical system.
Rated voltages DC 12 V, DC 24 V
12 V battery Supply on +12.7 V Σεχτιον2
%
to +16 V
24 V battery Supply off +11,1 V Σεχτιον2 %
-4 %
Supply on +25.4 V Σεχτιον2
Current consumption in the %
load range to +36 V
Supply off +22.2 V Σεχτιον2
Protection
% -4 %
Approx. 7 A with 12 V battery voltage
The input is protected against disturbance varia-

bles to DIN 40839 part 1, test pulses 1 to 4, test
severity IV.
The input is protected against Ñ polarity rever-
sal.
Power supply If external power is interrupted and you are
from the battery using a 5 m diagnostic cable (no power from the
vehicle), the Tester will be Ñbuffered by the
battery.
Battery type Nickel Cadmium, 12 V/2,8 Ah
Life expectancy More than 500 charge/discharge cycles
Buffer time Min. 0.5 hours in standby mode of CD ROM
and disk drives and of test instruments interface
Recharge time Approx. 2 hours
(on mains)
Power cable The power cable (6 meters) can be exchanged
for a power cable meeting your local standard.
The power cable must meet the standard for ser-
vice in grounded power supply systems.
(VDE 0805, EN 60950, IEC 950, UL 1950,
CSA 22.2 No. 950)
In the USA and Canada, a UL or CSA approved
power cable should be used.
External interfaces
COM1 (V.24) 9-pin Sub-D connector
Printer (IrDA) Internal COM2
Monitor (VGA) 15-pin Sub-HD socket
Keyboard 6-pin PS/2 socket
PCMCIA slot For PCMCIA cards
1 x type III or 2 x type II
13.2.2 Test Instruments
Inline current fusing 12 A, 600 V AC, 600 V DC,

type KLKD, UL listed

13-2 C79298-A3238-X120-04-19
Technical Data
13.2.2.1 Multimeter
&DXWLRQ
Maximum voltage of the U/R/D measuring lead: DC 60 V.
Common-mode voltage Max 40 V U/R/D

Common-mode suppression 50 to 60 Hz Σεχτιον 60 dB
in integrating measurement
Direct voltage at U/R/D Range Resolution Tolerance
(Ri Σεχτιον 4 MΣεχτιον) -2 to +2 V 0.001 V ±0.5 % of m.
±2 mV
-20 to +20 V 0.01 V ±0.5 % of m.
±20 mV
-50 to +50 V 0.02 V ±0.5 % of m.
±50 mV
Alternating voltage at U/R/D Range Resolution Tolerance
(effective value, 0 to 2 V 0.001 V ±1.5 % of m.
50 Hz to 5 kHz, ±4 mV
crest factor min. 3, 0 to 20 V 0.01 V ±1.5 % of m.
Ri Σεχτιον 4 MΣεχτιον) ±40 mV
0 to 40 VS 0.02 V ±1.5 % of m.
±80 mV
Alternating voltage at U/R/D Range Resolution Tolerance
(effective value, 0 to 2 V 0.001 V ±5 % of m.
5 to 10 kHz, ±4 mV
Crest factor min. 3, 0 to 20 V 0.01 V ±5 % of m.
0 to 40 VS 0.02 V ±5 % of m.
±80 mV
Direct voltage at DSO1 Range Resolution Tolerance
(Ri Σεχτιον 4 MΣεχτιον) -1.6 to +1.6 V 0.001 V ±1 % of m.
±4 mV
-4 to +4 V 0.002 V ±1 % of m.
±4 mV
-16 to +16 V 0.01 V ±1 % of m.
±20 mV
-40 to +40 V 0.02 V ±1 % of m.
±40 mV
-160 to +160 V 0.1 V ±1 % of m.
±200 mV
-400 to +400 V 0.2 V ±1 % of m.
±400 mV

C79298-A3238-X120-04-19 13-3
Technical Data
Alternating voltage at DSO1 Range Resolution Tolerance

(effective value, 0 to 1.6 V 0.001 V ±1.5 % of m.
50 Hz to 5 kHz, ±4 mV
0 to 16 V 0.01 V ±1.5 % of m.
±40 mV
0 to 40 V 0.02 V ±1.5 % of m.
±80 mV
0 to 160 V 0.1 V ±1.5 % of m.
±400 mV
0 to 400 VS 0.2 V ±1.5 % of m.
±800 mV
Alternating voltage at DSO1 Range Resolution Tolerance
(effective value, 0 to 1.6 V 0.001 V ±2.5 % of m.
5 to 10 kHz, ±4 mV
0 to 16 V 0.01 V ±2.5 % of m.
±40 mV
0 to 40 V 0.02 V ±2.5 % of m.
±80 mV
0 to 160 V 0.1 V ±2.5 % of m.
±400 mV
0 to 400 VS 0.2 V ±2.5 % of m.
±800 mV
Direct current inline Range Resolution Tolerance
(Ri Σεχτιον 250 mΣεχτιον) -1 to +1 A 0.001 A ±1 % of m.
via U/R/D cable ±5 mA
at 10 A socket -10 to 10 A 0.01 A ±1 % of m.
±50 mA
Alternating Current inline Range Resolution Tolerance
Effective value, 0 to 500 Hz, 0 to 1 A 0.001 A ±2 % of m.
crest factor min. 3, ±5 mA
Ri Σεχτιον 250 MΣεχτιον) 0 to 10 AS 0.01 A ±2 % of m.
via U/R/D cable ±50 mA
at 10 A socket
Direct current Range Resolution Tolerance
via current pick-up 50 A -5 to +5 A 1 mA ±3 % of m.
±10 mA1)
-50 to +50 A 10 mA ±3 % of m.
±100 mA1)
1)
The accuracy of the current pick-up is given
only after calibration.
Alternating current Range Resolution Tolerance
via current pick-up 50 A 0 to 5 A 5 mA ±3.5 % of m.
(effective value, 0 to 1 kHz, ±10 mA1)
crest factor min. 3) 0 to 50 AS 50 mA ±3.5 % of m.
±100 mA1)
1) The accuracy of the current pick-up is given

13-4 C79298-A3238-X120-04-19
Technical Data
Direct current Range Resolution Tolerance

via current pick-up 500 A -500 to +500 A 100 mA Σεχτιον3 % of
m.
Σεχτιον1 A1)
1)
Alternating current Range Resolution Tolerance
via current pick-up 500 A 0 to 500 AS 100 mA Σεχτιον4 % of
(effective value, 0 to 1 kHz, m.
crest factor min. 3) Σεχτιον1 A1)
1)
Resistance The measured current depends on the measure-
via U/R/D lead ment range and is maximum 13 mA.
Range Resolution Tolerance2)
0 Σεχτιον to 10 Σεχτιον10 mΣεχτιον±1 % of
m.
±10 mΣεχτιον0
Σεχτιον to 100 Σεχτιον0.1 Σεχτιον±1 % of
m.
±100 mΣεχτιον0
Σεχτιον to 1 kΣεχτιον1 Σεχτιον±1 % of m.
±1 Σεχτιον0
Σεχτιον to 10 kΣεχτιον10 Σεχτιον±1 % of m.
±10 Σεχτιον0
Σεχτιον to 100 kΣεχτιον100 Σεχτιον±1.5 % of
m.
±100 Σεχτιον0
Σεχτιον to 1 MΣεχτιον1 kΣεχτιον±2 % of m.
±1 kΣεχτιον0
Σεχτιον to 10 MΣεχτιον10 kΣεχτιον±2 % of
m.
±10 kΣεχτιονAn
acoustic signal is heard at a test object resi-
stance of Σεχτιον 2 Σεχτιον in continuity mea-
surements in the range 10 Σεχτιον.
2) Accuracy in measurement range 10 Σεχτιον and
100 Σεχτιον is given only after zero balancing.
Diode test Measurement current 1 mA

via U/R/D lead Measurement voltage max. 5 V
The current flow direction is indicated by a
diode symbol. During the measurement the
polarity of the measurement current is reversed.
13.2.2.2 Digital Storage Oscilloscope (DSO)
Required measuring leads DSO1/DSO2 measuring leads

kV pick-up
Trigger pick-up

C79298-A3238-X120-04-19 13-5
Technical Data
Measuring channels CH1, CH2 Sampling rate Max. 5 MHz

in channel 1 mode
Sampled-data Depth 16 k (meas.vals.)/
storage channel
Coupling AC, DC, GND
Measuring channels 2
Measurement inputs DSO1, DSO2,
kV pick-up
Time base
Time base Sampling rate
V',9 5 MHz3)
V',9 2.5 MHz
V',9 1 MHz
V',9 500 kHz
V',9 250 kHz
V',9 100 kHz
1 ms/DIV 50 kHz
2 ms/DIV 25 kHz
5 ms/DIV 10 kHz
10 ms/DIV 5 kHz
20 ms/DIV 2.5 kHz
50 ms/DIV 1 kHz
100 ms/DIV500 Hz
200 ms/DIV250 Hz
500 ms/DIV100 Hz
1 s/DIV 50 Hz
2 s/DIV 25 Hz
5 s/DIV 10 Hz
10 s/DIV 5 Hz
20 s/DIV 2.5 Hz4)
50 s/DIV 1 Hz4)
100 s/DIV 0.5 Hz4)
3) In channel 1 mode
4)
Only in Draw mode
Measurement inputs Make sure that both measurement connections
DSO1, DSO2, KV are adapted on each cable.
Bandwidth 100 kHz
(±3 dB)
Resolution 10 Bit
Accuracy DC to 10 kHz±1 %;
100 kHz -3 dB
Common-mode suppression to 100 kHz
= 40 dB
Common-mode voltagemax. 40 V
Measurement range selection Manual or automatic in Auto Setup

13-6 C79298-A3238-X120-04-19
Technical Data
Measurement ranges DSO1, Differential inputs Voltage divider

DSO2 = 4 MΣεχτιον, 25
pF
against protective
conductor potential
Range y deflection
±1.6 V 200 mV/DIV
±4 V 500 mV/DIV
±16 V 2 V/DIV
±40 V 5 V/DIV
±160 V 20 V/DIV
±400 V 50 V/DIV
Measurement range kV Range y deflection Tolerance
±8 kV 1 kV/DIV ±15 % of m.
±200 V
±20 kV 2.5 kV/DIV ±15 % of m.
±400 V
±40 kV 5 kV/DIV ±15 % of m.
±800 V
The size of the measurement error depends on
the ignition cable insulation and applies to use
in vehicle systems with mechanical distributors.
The kV input and the kV pick-up (ignition
voltage adapter) form a capacitive voltage divi-
der. The tester can be adapted to a stationary
ignition distributor system by external connec-
tion of the ignition voltage adapter.
Trigger pick-up input To record ignition timing on high-voltage
cables (secondary ignition coil)
Trigger functions Trigger channel DSO1, DSO2,
Trigger pick-up or
kV pick-up
Trigger coupling AC, DC, HF, LF
Trigger edge Positive, negative
Trigger level Automatic or
adjustable in 1 %
measurement range
increments
Trigger delay Pre-trigger and post-
trigger, adjustable in
10 % deflection
increments
Trigger mode Single, Normal,
Auto, Auto Level,
Auto Setup,
Draw mode

C79298-A3238-X120-04-19 13-7
Technical Data
13.2.2.3 Expansion Inputs
Temperature measurement input The measurement input is prepared for connec-

tion of a temperature sensor with a Pt 100
measuring element.
Pressure measurement input The measurement input is prepared for connec-
tion of a pressure sensor with a 4 mA to 20 mA
interface.
13.3 Measuring Leads
Cable bend diameter 14 x cable diameter

Mating cycles > 1,000
Dimensions (W x D x H) 735 x 760 x 1.340 mm

Weight 49 kg
Ambient conditions
Operation Ambient temperature 0 to +55 °C
non-condensing
Electrical connections
Power supply Non-heating appliance socket,
interchangeable IEC/CEE22 power cable
Tester supply Fixed cable with non-heating appliance inter-
face CEE22
Printer supply Fixed cable with non-heating appliance inter-
face CEE22
Wheels 4, 2 of which braked

13-8 C79298-A3238-X120-04-19
Technical Data
13.5 Printer
Type OKI OL610ex/OKIPAGE10ex

Display panel LCD display with 2 lines of 8 characters each
Dimensions (W x D x H)
OL6..ex/OKIPAGE10ex 320 x 360 x 160 mm/330 x 377 x 200 mm
Weight
OL6..ex/OKIPAGE10ex 7,7 kg/10 kg
Ambient conditions
Operation Ambient temperature 10 to 32 °C
Relative humidity 20 to 80 %
Storage (packed) Ambient temperature -10 to 43 °C
non-condensing
Electrical connected loads
230 Volt version
Voltage AC 230/240 V (+6 %/-14 %),
50 Hz, 60 Hz (±2 %)
Power consumption Operation approx. 100 W/200 W
OL6..ex/OKIPAGE10ex Max power consump. approx. 400 W/460 W
(in the heat-up phase)
Electrical connected loads
120 Volt version
Voltage AC 120 V (+5,5 %/-15 %),
50 Hz, 60 Hz (±2 %)
Power consumption Operation approx. 160 W
OL6..ex/OKIPAGE10ex Max power consump. approx. 420 W
(in the heat-up phase)
Interfaces
Power connection 3-pin appliance plug
Data Bidirectional Centronics
Emulation
OL6..ex/OKIPAGE10ex HP LaserJet 4 (PCL 5e)/HP LaserJet 5 (PCL 6),
EPSON FX 850, IBM Proprinter XL
Reliability/useful lives
Device useful life 180,000 pages or 5 years
Toner cartridge useful life Up to 2,000 pages with approx. 5% density
Drum unit With 5% density:
useful life up to 16,000 pages at 3 pages
per print job

C79298-A3238-X120-04-19 13-9
Technical Data
Print output
Speed
OL6..ex/OKIPAGE10ex 6/10 pages per minute in copy mode
Warm-up time
OL6..ex/OKIPAGE10ex 60/80 seconds (at room temperature of 25°C)
First page prints after an average of
17/14 seconds
Resolution 600 x 600 points per inch
Paper feed
OL6..ex/OKIPAGE10ex Cassette capacity 100/250 x 75 g/m2 sheets
Paper output
OL6..ex/OKIPAGE10ex Tray capacity of 100/150 x 75 g/m2 sheets
Specified paper quality
Individual sheets A4, Letter
Weight
OL6..ex/OKIPAGE10ex 60 to 90/105 g/m2 with automatic feed
60 to 120 g/m2 with manual feed
Memory 2 MB RAM
Safety standard
OL6..OL6..ex VDE 0871 Class B, EN 60950, VDE 0805, BS
7002
OKIPAGE10ex VDE 0871 Class B, VDE 0805, BS 7002, CE
Appendices to the Chapter: "Connector Use, Diagnostic Cable

and Diagnostic Adapter"

13-10 C79298-A3238-X120-04-19
Appendix to the Chapter "Technical Data"
Connector Use, Diagnostic Cables and Diagnostic

Adapter
1 12
2 11
13
3 14 18 10 9 10 11 12 13 14 15 16
4 15 17 9 Socket 1 2 3 4 5 6 7 8 Pin
16
5 8
6 7
View on plug-in side

3 m Diagnostic Cable VAS 5051/1

VAS 5051 connection Vehicle connection
8
17 16 Kl. 30
14
R02
9 1 kΩ
R01
7 1 Kl.15 1 kΩ
10 15 L-wire
18 7 K-wire
12 4 Kl. 31
16
13
1 5 signal ground
11 13 FK-L
5 m Diagnostic Cable VAS 5051/3

16 Kl. 30 R02
9
1 kΩ
R01
7 1 Kl.15 1 kΩ
10 15 L-wire
18 7 K-wire
4 Kl. 31
1 5 signal ground
11 13 FK-L
2SHUDWLQJ0DQXDO9$6
&$; 3DJH
3 m combo diagnostic cable VAS 5051/5

2 2 SAE J1850(+)
3 10 SAE J1850(-)
5 6 CAN (+)
6 14 CAN (-)
4 12 CAN screen
8
17
16 Kl. 30 R01
14
1 kΩ
9
R02
7
1 Kl.15 1 kΩ
10
15 L-wire
18
7 K-wire
12 4 Kl. 31
16
13
1
5 signal ground
11 13 FK-L
5 m combo Diagnostic cable VAS 5051/6

2
2 SAE J1850(+)
3
10 SAE J1850(-)
16 Kl. 30 R01
1 kΩ
9
7
R02
1 Kl.15 1 kΩ
10
15 L-wire
18
7 K-wire
4 Kl. 31
1
5 signal ground
11
13 FK-L
2SHUDWLQJ0DQXDO9$6
3DJH &$;
Diagnostic adapter VAS 5051/2
black
1 2
16 15 14 13 12 11 10 9 pin
8 7 6 5 4 3 2 1 Socket
1 2
View on plug-in side pin
white
Vehicle connection
Diagnostic cable connection black

2 Kl. 30
1 Kl. 31
16
4
7
15
2 K-wire
1 L-wire
white
2SHUDWLQJ0DQXDO9$6
&$; 3DJH
2SHUDWLQJ0DQXDO9$6
3DJH &$;
Forms and Addresses
14 Forms and Addresses
14.1 Forms for Registration and Fault Reporting
The appendix to this chapter contains the "Registration" and "Fault Report"
forms.
Use copies of these forms. Keep the sheets that you fax to Customer Service in
this operating manual, for example immediately following the appendix to this
chapter.

C79298-A3238-X120-04-19 14-1
Forms and Addresses
14.2 Service Addresses
This address list is maintained on a continuous basis and will be updated in later
versions. If there is no office listed for your country, please contact the SIEMENS
office in Germany.
14.2.1 Assignment of countries to regional support centres
Supported country Service address Supported country Service address

Abu Dhabi Egypt
Algeria France El Salvador

Andorra Spain Estonia Germany
Argentina Ethiopia
Australia Singapore Finland Sweden
Austria Germany France France
Bahama Islands USA French Guyana France
Bahrain Gabon
Belgium Belgium Georgia Germany
Bolivia Germany Germany
Bosnia-Herzegovina Ghana
Brazil Great Britain Great Britain
Brunei Singapore Greece
Bulgaria Guadeloupe France
Cambodia Singapore Guam Singapore
Canada USA Guatemala
Canary Islands Spain Haiti

Ceuta Spain Honduras
Chile
Hong Kong
China
Hungary
Columbia
Iceland Great Britain
Costa Rica India Singapore
Croatia Croatia Indonesia Singapore
Curacao Iran
Cyprus Ireland Ireland
Czech Republic Israel Germany

Italy Italy
Denmark Denmark
Ivory Coast France
Dom. Republic
Jamaica
Dubai
Japan
Dutch. Antillas
Jordan
Ecuador
Kazakhstan

14-2 C79298-A3238-X120-04-19
Forms and Addresses
Supported country Service address Supported country Service address

Kenya Slovenia
Kuwait South Africa
Latvia Germany South Korea
Lebanon Spain Spain
Liberia Sri Lanka Singapore
Libya Germany Sudan
Lithuania Sweden Sweden
Luxembourg Luxembourg Switzerland Switzerland
Macedonia Syria
Madagascar Tahiti Singapore

Taiwan Singapore
Malawi
Thailand Singapore
Malaysia Singapore
Tobago
Malta Italy
Togo
Martinique France
Mauritius Trinidad
Mellila Spain Tunisia France

Mexico Turkey
Morocco France Ukraine

Netherlands Netherlands United Arab Emirates
New Caledonia Singapore Uruguay
New Zealand Singapore
USA USA
Nigeria
Uzbekhistan Germany
Norway Sweden Venezuela
Oman
Vietnam Singapore
Pakistan White Russia
Panama Yemen
Paraguay Yugoslavia
Peru Zaire
Philippines Singapore Zambia
Poland Poland
Zimbabwe
Portugal Spain
Puerto Rico
Qatar
Réunion France
Romania
Russia
Saudi Arabia
Sharjah
Sierra Leone
Singapore Singapore
Slovakia

14-3 C79298-A3238-X120-04-19
Forms and Addresses
14.2.2 Regional support centres
Responsible Location FAX hotline for fault reports Telephone advice on use of
SIEMENS the VAS 5051
office
Belgium S.A. D´leteren n.v. Fault report Telephone advice

V.A.G Importeur by FAX to: On use of the VAS 5051
(fax form in the appendix to this chap-
Leuvensesteenweg 639 ter)
B-3071 Kortenberg 02-756-8440 (national) 02-756-8454 (national)
+32-2-756-8440 (international) +32-2-756-8454 (international)
Croatia Auto Centar Zubak Fault report Telephone advice

by FAX to: On use of the VAS 5051
Zagrebacka b.b. (fax form in the appendix to this chap-
10410 Velica Gorica ter)
01-622-4052 (national) 01-6269-026 (national)
+ 385-1-622-4052 (international) + 385-1-6269-026 (international)
Denmark Skandinavisk Motor Fault report Telephone advice

Park Alle 355 (fax form in the appendix to this chap-
2605 Broendby ter)
France Siemens SPA Fault report Telephone advice

A&D PA CSC by FAX to: On use of the VAS 5051
Chemin de Sandlach ter)
F-67506 Haguenau 0388-90-6688 (national) 0388-90-6677 (national)
Germany Siemens AG Fault report Telephone advice

A&D PA2 FT CS by FAX to: On use of the VAS 5051
Siemensallee 84 ter)
D-76187 Karlsruhe 0721-595-5252 (national) 0721-595-4308 (national)
Great SRS Automation Ltd Fault report Telephone advice

Britain by FAX to: On use of the VAS 5051
Unit 7 Daneside B. P. (fax form in the appendix to this chap-
Riverdane Road ter)
Congleton 01260-281831 (national) 01260-280809 (national)
Cheshire +44-1260-281831 (international) +44-1260-280809 (international)
CW12 1UN
Ireland Motor Distributors Ltd. Fault report Telephone advice

Naas Road (fax form in the appendix to this chap-
IRL-Dublin 12 ter)
01-4094431 (national) 01-4094372 (national)
+351-1-4094431 (international) +351-1-4094372 (international)
Italy Siemens S.p.A Fault report Telephone advice

Via Vipineto, 4 (fax form in the appendix to this chap-
I-20128 Milano ter)

14-4 C79298-A3238-X120-04-19
Forms and Addresses
Responsible Location FAX hotline for fault reports Telephone advice on use of
SIEMENS the VAS 5051
office
Luxembourg Autodiffusion M. Losch Fault report Telephone advice

S.e.c.s. (fax form in the appendix to this chap-
Zone Industrielle ter)
L-1818 Luxembourg - 02-495134 (national) 02-403333 (national)
Howald +35-2-495134 (international) +35-2-403333 (international)
Netherlands Siemens Nederland N.V. Fault report Telephone advice

Bedrijvencentrum, by FAX to: On use of the VAS 5051
PI Service EA (fax form in the appendix to this chap-
ter)
Werner von 070-333-3334 (national) 070-333-3050 (national)
Siemensstraat 1 +31-70-333-3334 (international) +31-70-333-3050 (international)
NL-2712 PN Zoetermeer
Poland Kulczyk Tradex Fault report Telephone advice

V.A.G Importeur by FAX to: On use of the VAS 5051
ul. Dziadoszanska 10 ter)
PL-61-248 Poznan 061-878-3802 (national) 061-878-3819 (national)
Singapore Siemens (Pte.) Ltd. Fault report Telephone advice

Technical Services Dept. by FAX to: On use of the VAS 5051
2 Kallang sector #6-00 ter)
SPG-349277 Singapore 0740-7196 (national) 0740-7202 (national)
+65-740-7196 (international) +65-740-7202 (international)
Spain Siemens S.A. Fault report Telephone advice

División I-ST by FAX to: On use of the VAS 5051
Albarracin 34 ter)
E-8037 Madrid 91-304-9217 (national) 91-514-8353 (national)
Sweden Siemens AB Fault report Telephone advice

Serviceavdelningen by FAX to: On use of the VAS 5051
Johanneslundsvägen 2 - 4 ter)
S-19487 Upplands Väsby 08-728-1703 (national) 08-728-1272 (national)
Switzerland AMAG Fault report Telephone advice

Zentralersatzteillager by FAX to: On use of the VAS 5051
Bahnhofstrasse 30 ter)
CH-8107 Buchs/ZH 056-463-9498 (national) 056-463-9191 (national)
USA Siemens Energy & Fault report Telephone advice

Automation Inc. by FAX to: On use of the VAS 5051
Field Service (fax form in the appendix to this chap-
ter)
390 Kent Avenue 847-640-0227 (national) 800-215-1646 (national)
Elk Grove Village (Illinois) +1-847-640-0227 (international) +1-800-215-1646 (international)
IL 60007

14-5 C79298-A3238-X120-04-19
Forms and Addresses
14.3 OKI Addresses
The OKI corporation has offices in the following countries. You can contact one
of them if you do not have an OKI representative in your area.
1RWH
While your VAS 5051 is under warranty, you should also contact the SIEMENS
services center if you have printing problems. The exception to this rule would
be the acquisition of consumables such as toner and the drum unit. The quickest
and easiest way to get these materials is through your local OKI representative.
Country Address Communication
Czech OKI Europe Ltd. Tel.: 2 32 66 41, ~ 42

Republic Branch Office IBC, Pobrezni 3 186 00 Fax: 2 32 66 21
Praha 8
Denmark OKI Systems a. s. Tel.: 43 66 65 00

Parkalle 382 Fax: 43 66 65 90
2625 Vallensbaek
France OKI Systèmes S.A. Tel.: 46.15.80.00

40-50, Av. Général de Gaulle Fax: 41.24.00.40
94240 L´Haÿ les Roses
Germany OKI Systems GmbH Tel.: 211 52 66 - 0

Hansaallee 187 Fax: 211 59 33 45
40549 Düsseldorf BBS: 211 52 66-222 300-
28800 bps, 8, N, 1
Datex-J/Btx: *222333#
Great OKI Europe Ltd. Tel.: 0 181 - 219 21 90

Britain Central House Fax: 0 181 - 219 21 99
Balfour Road,
Hounslow Middlesex TW3 1HY
OKI Systems Ltd. Tel.: 0 1236 - 50 25 02
3 Castlecary Road Fax: 0 1236 - 50 27 95
Cumbernauld G68 0DA
Hungary OKI Europe Ltd. Tel.: (36 - 1) 2 69 - 78 71,

Europa Center Karoly (Tanacs) ~ 73
KRT 11 5A Fax: (36 - 1) 2 69 - 78 72
1075 Budapest
Ireland OKI Systems Ltd. Tel.: 1 459 - 86 66

The Square Industrial Complex Tal- Fax: 1 459 - 88 40
laght,
Dublin 24
Italy OKI Systems S. p. A. Tel.: 2 90 - 07 64 10

Centro Commerciale "Il Girasole" Fax: 2 90 - 07 549
Palazzo Cellini - Lotto 3.05/B
20084 Lacchiarella (Milano)

14-6 C79298-A3238-X120-04-19
Forms and Addresses
Netherlands OKI Systems b.v. Tel.: 0 20 - 65 31 531

Kruisweg 765 Fax: 0 20 - 65 31 301
Postbus 690,
2132 NG (2130 AR) Hoofddorp
Norway OKI Systems A/S Tel.: 0 638 - 93 600

Hvamsvingen 9 Fax: 0 638 - 93 601
PO Box 174
2013 Skjetten
Poland OKI Europe Ltd. Tel.: (2) 66 15 40 7

Branch Office Fax: (2) 66 15 45 1
UL Grzybowska 80-82
00840 Warsaw
Singapore OKI Electronics Pte Ltd. Tel.: 2 21 - 37 22

78 Shenton Way #09-01 Fax: 2 21 - 92 82
Singapore 0207
Spain OKI Systems Tel.: 5 77 73 36

C/Goya 9 Fax: 5 76 24 20
Madrid 28001
Sweden OKI Systems AB Tel.: 08 - 7 95 58 80

Stormbyvägen 2-4 Fax: 08 - 7 95 65 27
PO Box 131,
163 55 Spånga

C79298-A3238-X120-04-19 14-7
Forms and Addresses
14.4 KNÜRR Addresses

Australia Ricon Pty Ltd. Tel.: (02) 95 19 - 48 77
Unit 1, 32 Lilian Fowler Place Fax: (02) 95 19 - 46 96
Marrickville NSW 2204
Austria Grothusen Ges. m. b. H. Tel.: (1) - 9 70 22 - 0
Albert-Schweitzer-Gasse 5 Fax: (1) - 9 70 22 - 9
1140 Wien
Belgium Knürr NV Tel.: 03 - 3.66.47.00
De Robianostraat 118 Fax: 03 - 3.66.41.01
2150 Borsbeek
Brazil Ellan Eletromecânica Ltda. Tel.: (0152) 63 - 24 44
Rua Joao Marcon, 165 Fax: (0152) 63 - 10 24
18550 Boituva - Sao Paulo
Brunei Amadeus Aerospace Serv. Pte. Ltd Tel.: + 637 - 9 - 83 10 20
PO Box 1604 Fax: + 637 - 2 - 65 55 37
Bandar seri Begewan 1916
Brunei Darussalam
Czech AutoCont A. S. Tel.: 0 69 - 6 15 23 92
Republic 1HPRFQLþQt Fax: 0 69 - 6 11 35 62
70200 Ostrava 2
Denmark Aksel Skaarup & Co. A/S Tel.: 44 85 04 85
Vasekaer 6-8 Fax: 44 94 99 89
2730 Herlev
Finland Perel Oy Tel.: 919 - 87 11 1
Torpankatu 28 Fax: 919 - 87 11 500
05801 Hyvinkää
France Knürr s. a. r. l. Tel.: (01) 43 77 85 85
ZAC Les Petits Carreaux Fax: (01) 43 39 02 10
4, Avenue des Violettes
94384 Bonneuil-sur-Marne
Germany Knürr-Interplast GmbH Tel.: + 49 (0) 75 72/76 00 0
Am Waldeck 1 Fax: + 49 (0) 75 72/76 00-30
D-88367 Hohentengen
Great Knürr (UK) Ltd. Tel.: 0 1480 - 49 61 25
Britain Burrel Road, Fax: 0 1480 - 49 63 73
St. Ives, Cambs, PE17 4LE
Hungary Kontaset Kft. Tel.: (36 - 1) 2 83 - 03 78
Helsinki ut. 53 Fax: (36 - 1) 2 83 - 01 12
1201 Budapest XX.
India Kirloskar Electrodyne Ltd. Tel.: 2 12 79 01 21 - 24
117, S. Block Fax: 2 12 79 03 16
M. I. D. C. Bhosari
Pune 411026
Israel Alexander Schneider Ltd. Tel.: 03 - 647 - 33 31
16 Heim Hazaz Street Fax: 03 - 647 - 41 14
Tel Aviv 69 497
Italy Forind Avio Tel.: (02) 95 34 30 80
Elettronica SpA Fax: (02) 95 34 31 04
Via Copernico, 6
20060 Cassina de'Pecchi

14-8 C79298-A3238-X120-04-19
Forms and Addresses

Japan CEC, Chuo Electronics Co., Ltd. Tel.: 04 26 - 58 - 58 11
Daiichi Seimei bldg., 7 Fl. Fax: 04 26 - 58 - 58 08
3-20-6, Myojin-cho
Hachioji-shi, 192 Tokyo
Malta Baron Technical Services Ltd. Tel.: 41 82 56
Everton House Fax: 41 82 53
Triq It-Torba
Attard
Netherlands Knürr Nederland BV Tel.: 0 76 - 54 22 92 2
Nikkelstraat 3 Fax: 0 76 - 54 21 01 5
4823 A. E. Breda
Norway Knürr Norge AS Tel.: 22 23 03 40
Gjerdums vei 16 Fax: 22 23 65 40
0881 Oslo
Portugal Sociedade Zickermann S. A. Tel.: 01 - 3 46 90 65
Rossio, 3, Apartado 2115 Fax: 01 - 3 46 91 29
1103 Lisboa Codex
Singapore Petracarbon Pte Ltd. Tel.: 2 71 - 08 00
1001 Redhill Industrial Estate Fax: 2 73 - 31 21
#04-01/06 Jalan Bukit Merah
Singapore 0315
South Korea MULTITEK Tel.: (0343) 58 08 16
294-2, Dang Jung Dong Fax: (0343) 58 08 17
Kun Po city, Kyung Ki Do
#435-030
Spain S. I. G., S. A. Polig. Ind. Jumapi Tel.: 91 - 8 89 89 61
Suecia, 8 Fax: 91 - 8 89 84 92
28812 Alcalá de Henares (Madrid)
Sweden Knürr Sverige AB Tel.: 08 - 7 03 99 00
Finlandsgatan 16 - 18 Fax: 08 - 7 03 99 35
16474 Kista
Switzerland Knürr AG Tel.: 01 - 8 06 54 54
Bruggacherstraße 16 Fax: 01 - 8 06 54 64
8117 Fällanden
United Arab Computer Network Systems Tel.: 02 - 722 888
Emirates P.O. Box 46144 Fax: 02 - 724 151
Abu Dhabi, U. A. E.
USA Knürr USA Inc. Tel.: (8 05) 5 26 - 77 33
1890 North Voyager Avenue Fax: (8 05) 5 84 - 83 71
Simi Valley, CA 93063
Knürr USA East Tel.: (8 03) 7 86 - 26 66
120 Northpoint Court Fax: (8 03) 7 86 - 24 44
Blythewood, SC 29016
Appendix to the Chapter: "Registration Certificate for VAS 5051", "Fault

Report Fax for VAS 5051"

C79298-A3238-X120-04-19 14-9
Forms and Addresses

14-10 C79298-A3238-X120-04-19
Registration certificate for VAS 5051
Please complete and return immediately to Siemens Service.
Fax No.: in Germany

[[ (international prefix)
Dear customer,
You have received the VAS 5051 Vehicle Diagnostic, Testing

and Information System with
system number shown here.
Field for DOC label
To safeguard future support
from Siemens Service, we ask that you
answer the questions below.
We need this data in order to provide optimal service for expansions, new versions and repairs, and for
handling of warranty claims.
We thank you in advance for your cooperation and hope you enjoy much success with your new test
system
Please type or write in capital letters using a black pen.
What is your postal address? What is your delivery address?

Importer/VZ number ________________________________________ (if different to postal address)
Dealership number __________________________________________
Company name _____________________________________________ ________________________ _______
Street address _________ No_____________________ ______________________ No __________
City, Zip ______________________________________________________ ________________________________
_____________________________________________ ________________________________
Country ______________________________________________________ ________________________________
Sales ID no. _________________________________________________
Tel. no. _______________________________________________________ ________________________________
Fax no. ______________________________________________________ ________________________________
When did you receive your tester?
Date____________________________
Who is your system administrator/liaison for our Service department?
Mr./Mrs.________________________Tel. no.___________________Fax no._______________
Place_____________________________Date___________________
Customer’s signature _________________________________________

Stamp
xxx
Fault Report Fax for VAS 5051
Please complete in full and fax to the Siemens hotline.
Fax no.: System no.:

_____________________________ DOC_____________
(from operating manual VAS 5051 section 14.2) (on the right side of the workshop trolley)
What is your postal address? What is your delivery address?

Importer/VZ number ________________________________________ (if different to postal address)
Dealership number __________________________________________
Company name _____________________________________________ ________________________ _______
Street address _________________ _____ No_________________ ______________________ No __________
City, Zip ______________________________________________________ ________________________________
_____________________________________________ ________________________________
Country ______________________________________________________ ________________________________
Tel. no. _______________________________________________________ ________________________________
Fax no. ______________________________________________________ ________________________________
Who is the contact in your company dealing with this fault?

Mr./Mrs.________________________Tel. no.___________________Fax no.__________________
Do you still have warranty cover? yes
Problems with the tester

(see sections 11.2, 11.3 of the operating manual)
Did the fault occur during tester startup before the start mask appeared? yes
Did the fault occur during normal operation? yes
Test instrument unit self-test error? yes
Diagnostic bus unit self-test error? yes
Error message:____________________________
Problems with the measuring leads

(see section 11.3.3 of the operating manual)
During which test did faults occur?
U/R/D/COM measuring lead Trigger pick-up
DSO measuring lead kV pick-up
Current pick-up 50 A Diagnostic cable
Current pick-up 500 A Diagnostic adapter
Problems with the printer/IrDA adapter

(see section 11.3.4 in the operating manual)
During which test did faults occur?
Infrared transmission (IrDA adapter)?
Printer?
Fault characteristics:_________________________________
Can the fault be reproduced? yes

Does the fault only occur sporadically? yes
More detailed fault description on supplement sheet

xxx
Supplement Sheet to Fault Report Fax for VAS 5051
In which software version did the fault occur?
(retrieve data from the start mask information window)___________________________
Which language version is installed on your tester?_________________________________
In which operating mode did the fault occur?

Vehicle self-diagnosis?
Test instrument?
Guided fault finding?
Applications?
Administration?
Fault message text/no _________________________________________________
_________________________________________________
_________________________________________________
Fault description in guided fault finding

In which vehicle identification did the fault occur?
(retrieve data from the right-side information window)
__________________________________________________
__________________________________________________
__________________________________________________
During which function test and in which test step did the fault occur?
(retrieve data from the left-side information window/work window)
__________________________________________________
__________________________________________________
__________________________________________________
What actions led to the fault?

__________________________________________________
__________________________________________________
__________________________________________________
What do you need in your view to solve the problem?
Tester?
Printer?
Cable/lead?
Other material?
Required material according to parts list

(see appendix to chapter 11 of the operating manual)
______________________________________________________________
______________________________________________________________
Location _____________________________Date___________________
Customer’s signature _________________________________________

Stamp
[[[
xxx
Terms
15 Terms
Table 15-1 Terms and Explanations
Terms Explanation
Adaption values Values stored in the Ñcontrol unit, which can be adapted to the vehicle in a fixed range.
Alphanumeric key- Keyboard by which numbers and text can be entered.

board
Amplitude The maximum value that the amount of deviation of an oscillation, e.g. a voltage, an alter-
nating current, can reach.
Basic setting To permit settings to be made, the controls in the Ñcontrol unit are shut off and set to a
basic value.
Buffered The power supply to the tester is buffered; that is, if the power fails or the tester is moved
with its power cable disconnected, the installed accumulator provides the power supply
for a limited time.
Calibration Determining the deviation of a test device (e.g.: current pick-up).
CD-ROM Compact Disk - Read Only Memory: A storage medium that looks like a music CD that
can be read only; it cannot be written to.
Channel number Number of a measured value channel in the Ñcontrol unit.
COM: "Common"; corresponds to "Ground" or "0 V"; measurement device input
Control unit Electronic device to control and monitor vehicle functions. ÑVehicle system
Data block ÑDisplay group.
Degree of suspicion The order in which Ñdiagnostic objects are suspected of having faults.
Deselection, deselec- Canceling a selection of program functions or list entries. ÑSelection.

ting
Diagnosis The entire process of assigning Ñfault characteristics to possible faulty functions, com-
ponent groups or components until a faulty component is localized. Can be determined by
retrieving expert knowledge from the knowledge base or from the user’s direct expert
knowledge. The result of the process is also sometimes termed "diagnosis".
Diagnosis object Umbrella term for functions, component groups or components to which the diagnostic
function is applied.
Diagnostic cable Connection cable between the vehicle and tester.
Diagnostic connec- Connection socket for the diagnostic lead on the tester or vehicle
tion
Diagnostic strategy Process of guided fault finding based on the available information about a fault such as
1. fault codes read from vehicle systems,
2.complaint reports (terms selected by the user from masks to describe symptoms or fault
characteristics) or
3. terms describing functions and components of the vehicle selected by the user from
masks as possible fault sources; Ñown test plan.
The three entries, either individually or combined, lead to a calculated test proposal in the
test plan. The strategies (1.) and (2.) are designated as system-guided fault finding, while
(3.) is designated as user-guided fault finding.

C79298-A3238-X120-04-19 15-1
Terms
Dialog box On-screen information box showing messages and expecting entries from the user.
Direct current measu- Current measurement in which the tester is used as an ammeter directly in the circuit.
rement (inline current Opposite: Inductive current measurement via a current pick-up clamped on the cable.
measurement)
Display group A fixed group of data that can be read from the vehicle system.
Document Documents in the tester containing information (images, text) that can be used as needed
by the user.
DSO Digital Storage Oscilloscope
Fault characteristics The entire effects (Ñfault symptoms) of a fault scenario in vehicle functions, component
groups or components.
Fault memory Data memory of the Ñcontrol unit in which all detected faults are stored.
Fault symptom A describable effect of a fault symptom in the vehicle functions, component groups or
components. The symptoms make up the Ñfault characteristics. Known symptoms assi-
gned to suspect diagnostic objects are stored in the database of the tester. ÑDiagnosis.
Floating No connection to the power supply or to the grounding.
Function Every action that the tester can take in the various Ñoperating modes. Individual
functions usually are selected from a list displayed on-screen.
Function test A test program with which functions, component groups or components can be checked
as to whether they meet requirements. The function test also can be used for a repair
check.
Guided fault finding This covers the diagnostic process in an optimized procedure including vehicle identifica-
tion, vehicle system test, test plan and function test.
Initial graphic Switchable image of a vehicle that appears in the Ñstart mask.
Inline current measu- ÑDirect current measurement.

rement
IrDA Infrared Data Association.
Job code A unique combination of characters and letters to identify interrupted and saved diagnosis
jobs.
Key CD CD on which the Ñexpanded functions are stored. It must be inserted in the tester’s drive
to access the expanded functions.
Marque separation On devices with marque separation, only CDs for the vehicle marques required in the
dealership in question need be installed on the tester. Without installation of at least one
marque-specific CD the devices cannot run Ñguided fault finding.
Mask On-screen display with pre-set breakdown into various graphical elements such as win-
dows, buttons, scroll bars, etc.
Measurement type In "Test instrument" mode, the measurement type defines whether the measurement is
executed with DC voltage or AC voltage. In "Guided Fault Finding" mode the measure-
ment type determines whether a current or a voltage is measured in a function test.
Mode, Modes The current operating state of the tester, or its program.
Navigation bar Functions in the lower portion of the mask, e.g. switching from the current mask to
another mask in guided fault finding.
Numeric keyboard Keyboard by which only numbers can be entered, no text.

15-2 C79298-A3238-X120-04-19
Terms
Operating mode Any basic tester function that can be activated from the Ñstart mask: "Vehicle self-dia-
gnosis", "Test instrument", "Guided Fault Finding", "Administration" and "Help". Each
operating mode is divided into individual Ñfunctions.
Operating system The software installed in the tester.
Oscilloscope Measurement and display device for electrical signals that displays the time characteristic
of the signal strength (e.g. oscillations)
Own test plan ÑDiagnostic strategy based on the selection of descriptions of possible defective
functions and components by the user. If faults in the vehicle system are detected during
diagnosis or a complaint report is entered, the test plan differentiates between the system
test plan and an own test plan.
Permanent fault A continually occurring or continuous fault.
Preselection The suggestion of the tester to call up one of several functions from the current Ñmask.
The preselection is shown by a black bar on the screen. You can change it at any time.
Print screen (Hard- Paper printout of the screen contents ( Ñmasks, etc.)
copy)
Pull-up menu Selection menu that the tester displays on-screen when certain buttons on the navigation
bar are chosen.
Quit Response to a query from the tester, resulting in termination of a function or dialog.
Reversed polarity Mistakenly switching the connection leads for the power supply.
Run-up Tester action between power-up and the first display of the Ñstart mask, which includes
loading data, a self-test, etc. Tester run-up takes approximately 1.5 minutes, during which
time no entries can be made.
Screensaver (standby Advanced Power Management (APM): If the touchscreen has not been used for ten minu-
mode) tes, the tester turns off the display to conserve energy. The operating system continues
running. To activate the mask display, touch the top edge of the mask.
Selection bar Visual identifier of a selected line.
Selection, selecting Selecting a program function or a text entry from a list. The selected element is highligh-
ted on-screen by a black bar. ÑDeselection.
Self-diagnosis Vehicle systems are capable of making self-diagnoses. They have methods to check their
own functions, connected sensors and actuators. A fault leads to an entry in the fault
memory of the vehicle system. The tester has all faults in its knowledge base so that it can
make a test proposal based on reading the fault memory and allocating a fault code to a
fault type and location.
Sensor Device that picks up measured values.
Shutdown delay The time between pressing the on/off button to switch off the computer and the actual
shutdown. The shutdown delay is approximately 10 seconds.
Signal tone Beep or whistle emitted by the tester when, for example, the battery voltage reaches a
limit in buffer mode.
Sporadic fault An occasional or short-term fault.
Start mask The display on the screen after the tester starts operation. From here, the tester‘s operating
modes can be accessed. Identifiable by the Ñinitial graphic.

C79298-A3238-X120-04-19 15-3
Terms
Sub-mask Any of several mask displays that belong to the sameÑ function and allow selection of
restricting criteria or subfunctions, for example. Sub-masks in the same function are very
similar and show the same basic data as set in other sub-masks in their information win-
dows.
Test plan In guided fault finding, table listing the diagnosis objects determined by generation of
suspicions and by fault finding algorithm.
Touchscreen (touch- Mask that has a touch-sensitive surface. The hardware and software reacts when an object
sensitive surface) such as a finger touches the screen, recognizes the place touched and triggers the associa-
ted Ñfunction (e.g. a button). The touchscreen replaces externally connected input
devices such as a keyboard, mouse, etc.
Trigger level Voltage value at which the measurement of a test signal characteristic is started.
Trigger signal The signal used to start the graphing process of a test signal characteristic.
Update New version of the knowledge base imported from CD.
Vehicle system A Ñcontrol unit known by name, including associated sensors, actuators and cabling.
Virtual keyboard The graphical display of a keyboard on the Ñtouchscreen. The individual buttons can be
used by fingertip control just as with a real keyboard.

15-4 C79298-A3238-X120-04-19
Index
16 Index
$ Drum
Fuse
Measuring lead
Accumulator Printer
Adaption Printer Settings
Adaption value Printing Mechanism
Administration Sight Check
CD contents list Storage battery
Date/time Tester
Enter workshop code / Change Touchscreen
dealership identifier Workshop trolley
CD
Expanded functions Contents list
Overview Channel number
Print format Cleaning the Printing Mechanism
Select function
Select initial graphic COM Measuring lead
Self-test Combo diagnostic cable
Signal generator Complaint report
Start
Update installation Continuity test
Air filter Control unit
Amplitude
Coupling
Applications Current pick-up
Overview
Associated documents
Audio output '
Auto level mode
Auto mode
Data block
Auto setup mode
Dealership identifier
Dealership number
% Default measurement
Degree of suspicion
Device mounting
Basic Setting Diagnosis
Basic setting Diagnosis log
Buffered Diagnosis object
Diagnostic adapter
& Diagnostic bus
Diagnostic cable
Diagnostic connection
Calibration Diagnostic function
Adaption
Test Instrument Erase adaption values
Tester Erase fault memory
CAN Final control diagnosis
Controller Area Network Interrogate fault memory
Read data block
Care and Maintenance Update programming
Calibration Diagnostic strategy
Manuel d’utilisation VAS 5051

C79298-A3238-X140-04-19 16-1
Index
Dialog box *
Digital Storage Oscilloscope

Diode test General Information
Direct and Alternating Current Mea-
surement General Notes
direct Go to menu
Direct and alternating Current Mea- Guided fault finding
surement
via current pick-up
Direct and Alternating Voltage Mea- Complaint report
surement Connection to vehicle
Direct current measurement Diagnosis log
Digital Storage Oscilloscope
Display group
Document Documents
DSO
Draw mode Exit
DSO Measuring lead Fault memory contents
Function test
log
( Function/component selection

Interrupt
End-user part
Overview
Energy-saving mode
Start
Enter workshop code / Change dea-
Target menu
lership identifier
Test plan
Equipment mounting
Vehicle identification
Error Message
Vehicle system test
Expanded functions
) +
Hard copy
Fault
Help
Permanent
Contents
Sporadic
with buttons
Fault characteristics
with topics
Fault memory

erase ,
interrogation
Fault memory contents
Image drum unit
Fault symptom Image position
Final control diagnosis Importer number
Forming the Storage battery Indicator
Function Individual diagnosis
Function test Information box
Information window

Function/component selection
Initial graphic
Fuse Initial Screen
Change Inline current

16-2 C79298-A3238-X140-04-19
Index
Interface
Centronics Diagnostic adapter
IrDA
Interrogate fault memory
IrDA Diagnostic cableLLL
Adapter

Troubleshooting
Interface LT
DSO measuring lead

- Structure
U/R/D Measuring Lead
Job code
U/R/D measuring lead

. Work process
measuring lead
COM measuring lead
Key CD
Measuring mode
Keyboard
Meßkabel
Alphanumeric
Diagnoseadapter

Diagnosekabel
Numeric
LT
Operation
Kombi-Diagnosekabel
Virtual
Mode
keyboard
Auto
Numeric
Auto level
kV pick-up
Auto setup
Draw
/ Normal
Single
Multimedia
LED Select title
Start video
bar Multimeter
lines
Row
Log
1
0
Navigation bar

Mask Normal Mode
Measure mode Normal mode
Measurement type

Measuring lead 2

OBDII

Operating buttons
Operating Mode
COM measuring lead

Operating System
Combo diagnostic cable LLL
Operation

C79298-A3238-X140-04-19 16-3
Index
Keyboard Troubleshooting
Tester Work process
Touchscreen Printer Settings
VAS 5051 Probe Rate
3 4
Paper cassette Quit

Parts List
Pause
Permanent fault 5
Pick-up
Current pick-up Repair part
Replacement part
Resistance Measurement
kV pick-up Reversed polarity

Trigger pick-up
6
Pickup
Current pick-up
SAE
kV pickup
Society of Automotive Engi-
Print
neers Normenwerk
Print format/tsee Administration

Safety
Printer
Safety NoticesLLL

Safety notices
Back
Save result
Screen capture
Display box
Screen dump
Display field
Of a multimedia file

Screen shot
Driver
Scroll bar
Drum

Cleaning
Selection Bar
Drum unit
Selection bar

Self-diagnosis
Front
log
Image drum unit
Self-diagnosislog
Insert toner cartridge
Self-test
Loading Paper

Paper Bin
Diagnostic bus
Paper Jam
Test Instrument
Paper tray

Print format/tsee Administration
Set date

Set time
Structure
Set up
Front
Making the Connection
Toner
Preparation
Toner Cartridge
Turning on the Tester

Shortage of Toner
inserting the
Shut down interval
Toner cassette

16-4 C79298-A3238-X140-04-19
Index
Sight Check Continuity test

Signal generator Digital Storage Oscilloscope
Signal tone
Single Mode Diode test
Single mode Direct and Alternating Current
Slide control Measurement
direct
Sporadic fault Direct and alternating Current
Standby mode Measurement
Start via current pick-up
Administration Direct and Alternating Voltage
Guided fault finding Measurement
Help DSO
Test Instrument Freeze frame with a cursor dis-
Vehicle self-diagnosis played
Start Mask Freeze frame with both cursors
displayed
Start mask Function block
Startup
Switching off Image position
Storage batteryLL Measure mode
Multimeter
Change Overview
Forming Probe Rate
Structure Resistance Measurement
Measuring lead Self-test
Printer Start
Back Trigger mode
Front Test instruments
Tester Channel A
Back Channel B
Front Image position
Left side Time base
Right side Trigger mode
Top Voltage DSO1
VAS 5051 Test plan
Workshop trolley
Submask Individual
Switching off the tester Test steps
Tester
Back
7 Care and Maintenance
Display box
Target menu Display field
Test dialog
Test Instrument
Front
Left side
Operation
Calibrate Right side
Channel A Structure
Top
Channel B Troubleshooting
Work process

C79298-A3238-X140-04-19 16-5
Index
Tester mounting Fault memory

Time base interrogation
Toner cassette Final control diagnosis
Toner low Function
Touchscreen OBDII
Overview
Read data block
Clean Select diagnostic function
Operation Select vehicle system
Trigger Start
gauge Update programming
level Vehicle system
pick-up Vehicle system
point
signal
Troubleshooting
Classification
Computer vehicle system
Drum Vehicle system test
Error Message Voltage DSO1
Exchanging Components
IrDA Adapter
Measuring lead :
Paper Jam
Printer Work interruption
Self-test Work process
Computer hardware Measuring lead
Test Instrument and diagno- Printer
stic bus unit Tester
Test Instrument VAS 5051
Tester Workshop trolley
Toner Work window

8 Workshop Code
Dealership number
Update Importer number
Installation Workshop code

9 Dealership number
Importer number
VAS 5051 Workshop trolley
Operation
Structure Care and Maintenance
Work process Structure
Vehicle identification Work process
workshop trolley
Vehicle self-diagnosis Using the tester without

=
Adaption
Erase adaption values
Erase fault memory Zero potential
Exit

16-6 C79298-A3238-X140-04-19
xxx
Designation Order number
Operating Manual VAS 5051 (with folder) 7KE3180-1xx
Language key
xx Language
AA German
AB Polish
AC Czech
AD Hungarian
AE English GB
AF English USA, Canada
AG Dutch
AH Swedish
AJ Danish
AK French
AL Italian
AM Spanish
AN Portuguese
AP Croat
AQ Japanese
AR Finnish
AS Greek
AT Chinese
AU Russian
AV Turkish
AW Hebrew
BA Romanian
BB Macedonian
BC Norwegian
BD Slovenian
BE Slovakian
We have verified that the contents of the printed document match the described hardware and Distribution or reproduction of this manual, or exploitation or disclosure of its contents,
software. Nevertheless, the possibility of discrepancies cannot be excluded, and consequently is not permitted without express consent. Infringements of the copyright shall be liable
we cannot give any guarantee of complete conformance. The information given in this to claims for payment of damages. All rights reserved, in particular in the event of
document is, however, checked on a regular basis and necessary corrections are included in patent issue or utility model registration.
subsequent editions. We would therefore be grateful for any suggestions for improvement you
may have.
Subject to technical changes. Copyright  Volkswagen AG 2000 All Rights Reserved
Volkswagen Aktiengesellschaft Printed in Germany

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Vehicle Diagnostic, Testing and Information System

Operating Manual Order Number 7KE3180-1AE

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Operating Manual VAS 5051

7.6 Vehicle System Test ................................................................................ 7-8

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Operating Manual VAS 5051

10.4 Help on Topics ..................................................................................... 10-3

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Operating Manual VAS 5051

13.2 Tester ................................................................................................... 13-1

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Operating Manual VAS 5051

Appendices to chapter 1 General Information:

Appendix to chapter 3 Startup:

Appendix to chapter 11 Troubleshooting:

Appendix to chapter 12 Care and Maintenance:

Appendix to chapter 13 Technical Data:

Appendices to chapter 14 Forms and Addresses:

Operating Manual VAS 5051

This is important information about the product or how it is used, or indicates a

Operating Manual VAS 5051

Read all the safety notices:

Operating Manual VAS 5051

Electric ignition systems carry voltages up to 30 kV. Generally applicable safety

Operating Manual VAS 5051

If you open the equipment without authorization or perform improper repairs,

Operating Manual VAS 5051

1.1 General Notes

1.2 Safety Instructions

1.3 Designated Use

• The VAS 5051 may be used only on a vehicle.

Operating Manual VAS 5051

1.4 Associated Documents

1.5 Area of Application

Fault detection and localization in vehicles with the help of

The VAS 5051 is characterized by

Appendices: "Declaration of Conformity", "Zertificate of Calibration"

1. The glossary arrow Ñ refers to an explanation of the marked concept in

Operating Manual VAS 5051

The device described in the following,

On behalf of the manufacturer

Karlsruhe, September 15, 1997

Keller ........................... Dr. Funke ...........................

Section Manager Engineering Management

Operating Manual VAS 5051

manufactured and delivered the device

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