Connecting vehicle diagnosis and service information system VAS 5052 and selecting engine electronics control unit — AUDI

Connecting
vehicle diagnosis and service information system
VAS 5052
and selecting engine electronics control unit
Special tools and workshop equipment required
Vehicle diagnosis and service information system
VAS 5052
Test conditions
The battery voltage must be at least 11.5 V.
Fuses OK.
Earth connections on engine and gearbox OK.
Switch off air conditioner.
On vehicles with automatic gearbox the selector lever must be in
“P”
or
“N”
position.
Procedure
Open rear ashtray (in centre console) and remove cover for diagnostic connector.
Connect
vehicle diagnosis and service information system
VAS 5052
.
WARNING
Test equipment must always be secured on the rear seat and operated from that position by a second person.
If test equipment and measuring instruments are operated from the front passenger's seat and the vehicle is involved in an accident, the person sitting in this seat could be seriously injured when the airbag is triggered.
Depending on the function required:
Switch on ignition or start engine.
Selecting operating mode:
Select function
“Vehicle self-diagnosis”
.
Indicated on display:
Selecting vehicle system:
Select
“Engine electronics”
on display.
Note
Vehicle system selection prompt appears in display zone
1
.
“Scrolling”
screen display with bar
2
permits display of vehicle systems (for all vehicle models and equipment levels) which are envisaged for self-diagnosis but are not currently visible on the screen.
Wait until
“Select diagnosis function”
appears in zone
1
on display.
The control unit identification and coding appear in display zone
2
, e.g.:
8D0907401..
Control unit number (refer also to Parts catalogue)
2.5 ltr.
Engine capacity
V6
V-engine / 6 cylinders
TDI
Turbo diesel
G or no display
Vehicle with or without cruise control
000
Control unit maps
AG
SG
Automatic gearbox
Manual gearbox
0..
Data level (software version) of control unit
Coding 02002
Example: coding of engine control unit
WSC 12345
Dealership code of fault reader
V.A.G 1551
with which the last coding was performed
If the coding does not correspond to the equipment in the vehicle:
Check control unit code
Chapter
, coding engine control unit.
Selecting diagnostic function:
At this point all diagnostic functions are available.
Select desired function on display.
Refer to repair operations for further procedure.
Note
In the functions Basic setting and Reading measured value block, the display zones are shown from top to bottom.