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

ARH
Test conditions

Fuses for engine electronics OK
Fuel pump relay OK.
Battery voltage at least 11 V
Earth connections on engine and gearbox OK.

Switch ignition off.
Connect vehicle diagnostic, testing and information system VAS 5051 with diagnosis cable VAS 5051/1. As an alternative, connect fault reader V.A.G 1551 with diagnosis cable V.A.G 1551/3.

Note:

The diagnosis connection is in the knee padding at the front left.

Warning!
When performing test-drives and checks, the vehicle diagnostic, testing and information system VAS 5051 as well as the fault reader V.A.G. 1551 may be secured only on rear seat, from where it is to be operated.
Please follow safety precautions => Page
24-1

Note:

Only the procedure for self-diagnosis using fault reader V.A.G. 1551 is described below. For details of how to use the vehicle diagnostic, testing and information system VAS 5051, please refer to its operating manual.

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

1)
appears alternately

If no display appears, check diagnostic cables:

=> Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations binder; Fault-finding programme: "Diagnostic wiring"

Depending on the function required (=> table of selectable functions Page
01-2
):

Switch ignition on.

or

Start the engine.
Switch on fault-reader printer with the Print key
(Warning lamp in key lights up).
Press key 1 for "Rapid data transfer".

Rapid data transfer
HELP
Enter address word XX
Indicated on display:

Rapid data transfer
Q
01 - Engine electronics
Press keys 0 and 1 for address word "Engine electronics" and confirm entry by pressing the Q key.

Note:

Rapid data transfer
HELP
Control unit does not answer
If the display shows one of the messages reproduced here, run through the fault-finding procedure as described in the Fault-Finding Programme for diagnosis wiring.

=>
Rapid data transfer
HELP
Fault in communication build up
Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations

Rapid data transfer
HELP
K wire not switching to earth

Rapid data transfer
HELP
K wire not switching to positive

4B0906018.. 1.8l
R4S/5V MOTR HS
D..⇒
Coding 05002
WSC 06388
The display on fault reader V.A.G 1551 will show the control unit identification. For example:

- 4B0906018.. · Control unit number (see Parts List)
- 1.8 ltr. · Engine capacity
- R4S/5V · In-line, normally aspirated engine, 4 cylinders, / 5 valves per cylinder
- MOTR · Motronic
- HS / AT · HS = manual gearbox / AT = automatic transmission
- GRA (or CCS) · Only appears on vehicles with cruise control system
- D.. · Software version in control unit
- Coding 05002 · Control unit coding / (Coding => Page ) 01-50
- WSC 06388 · Workshop Code of the V.A.G 1551 with which the last coding was performed

Notes:

Incorrect coding may lead to higher emissions and increased strain on the automatic gearbox resulting from harsh gear-shift jolts.
Incorrect coding also causes non-existent faults to be stored in the fault memory.

If the coding differs from the vehicle version, then:

Check control unit coding
=> Coding engine control unit, Page
01-50
Press ⇒key.

Rapid data transfer
HELP
Select function XX
Indicated on display:

Note:

Press the HELP key to obtain a printout of the functions which are available.