Connecting vehicle diagnostic, measurement and information system VAS 5051 or fault reader V.A.G 1551 and selecting functions — AUDI

AMM AMX
Test requirements:

Fuses for engine electronics OK

=> Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations

Fuel pump relay OK; checking =>Page
24-53
.
Battery voltage at least 12,7 V
Earth connections on engine and gearbox OK.

Procedure

Open rear ashtray (centre console) and remove cover for diagnostic connector.

Connect up vehicle diagnostic, testing and information system VAS 5051 with diagnostic cable VAS 5051/1. Alternatively, connect fault reader V.A.G 1551 with diagnostic cable V.A.G 1551/3A.

Important:
Pay attention to the safety precautions => Page
01-2
.
Note:

The following describes self-diagnosis using the fault reader V.A.G 1551 only.

When using the vehicle diagnostic, testing and information system VAS 5051, follow the procedures described in equipment's operating instructions.

V.A.G
SELF DIAGNOSIS
HELP
1 - Rapid data transfer 1)
2 - Flash code output 1)
Indicated on display:

1)
Appears alternately

Note:

If the display remains blank:

Perform fault-finding in line with "Diagnostic wire fault finding instructions".

=> Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations

Depending on required function => "Available functions" table, Page
01-8
.

Switch the ignition on.

or

Start the engine.
Switch on the fault reader printer with the print key. The indicator lamp in the key must light up.
Press key 1 for "Rapid data transfer".

Rapid data transfer
HELP
Enter address word XX
When indicated on display:

Note:

Address word 00 is used to start the automatic test sequence i.e. interrogation of fault memories in all vehicle systems with self-diagnosis capability in vehicle with rapid data transfer.

Enter "01" for address word "Engine electronics" and confirm entry with Q key.

3B0907551B
2.8l V6/5V
G
0002
⇒
Coding 11551
WSC 12345
The fault reader V.A.G 1551 display will show the control unit identification, for example:

Note:

The control unit identification can be printed out by pressing the PRINT key on fault reader V.A.G 1551.

Control unit identification (example)

- 3B0907551 B · Part-No.; assignment / => Parts List
- 2.8l · Engine capacity
- V6/5V · Design of engine (V-engine, 6-cylinder, 5-valve)
- "G" or no display · Vehicle with or without cruise control
- 0002 · Control unit software version
- Code 11551 · Control unit code
- WSC 12345 · Workshop Code of V.A.G 1551 with which encoding was last performed

Press ⇒key.

Rapid data transfer
HELP
Select function XX
Indicated on display (function selection):

Notes:

The control unit identification can be displayed again by entering function "01" for "Interrogating control unit version" and confirming with the Q key.
Rapid data transfer
HELP
No reply from control unit
When adjacent display appears:

Perform fault-finding in line with "Diagnostic wire fault finding instructions".

=>
Rapid data transfer
HELP
K wire not switching to earth
Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations

Rapid data transfer
HELP
K wire not switched to positive

Rapid data transfer
HELP
Communication problem

Available functions

Vehicle diagnostic, measurement and information system VAS 5051 orfault reader V.A.G 1551 · Ignition on, / engine stopped · Engine idling · Vehicle running · Page
Address words
01 · Engine electronics · yes · yes · yes · 01-3
00 · Automatic test sequence · yes · yes · yes · 01-5
Functions
01 · Check control unit version · yes · yes · yes · 01-7
02 · Interrogating fault memory · no · yes · yes · 01-9
03 · Final control diagnosis · yes · no · no · 01-48
04 · Basic setting · yes · yes · yes · 01-55
05 · Erasing fault memory · yes · yes · yes · 01-9
06 · End of output · yes · yes · yes · 01-11
07 · Encoding control unit · yes · no · no · 01-60
08 · Reading measured value block · yes · yes · yes · 01-63