Page 3 of 12

01-2
       When the data link has been established, you 
can then select the required troubleshooting 
functions provided. The functions represent 
program sequences within On Board Diagnostic 
(OBD). Their application is described in the 
appropriate sections of this repair manual. After 
first checking the control module version, start 
the troubleshooting procedure with "Check DTC 
Memory" function 02.  
      Any DTCs which may be stored in DTC memory 
will be indicated on the display of the scan tool. 
Diagnostic information leads via DTC tables to 
possible causes and specific repair procedures. 
DTC tables are located in the appropriate 
sections of this repair manual.  
      The OBD distinguishes between "static" and 
"sporadic" malfunctions. If a malfunction which 
has been stored as "static" is no longer present 
when the ignition is switched on, it is converted 
to "sporadic".  
      Sporadically occurring malfunctions are indicated 
as such. "/SP" will appear at right on the tester 
display.  
      A sporadic malfunction is erased automatically if 
it no longer occurs after a certain number of 
driving cycles.  
Pa
ge 3 of 12 On Board Dia
gnostic 
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.1 
     
        
        Page 6 of 12
01-5
      
-  Remove cover for Data Link Connector (DLC).
    
-  Connect scan tool to Data Link Connector (DLC) with the ignition off 
using VAG1551/3 adapter cable. 
Pa
ge 6 of 12 On Board Dia
gnostic 
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.1 
     
        
        Page 8 of 12
01-7
      
-  Switch ignition on.
     
-  Switch printer on by pressing PRINT button on 
scan tool. 
     
-  Press button -1- to select "Rapid data transfer" 
operating mode 1. Rapid data transfer 
HELP
Insert address word XX
    
Indicated on display:  
Note:  
The address word selects the control module that you wish to test using 
the scan tool. The address word consists of two digits and is indcated in 
the relevant section of this repair manual. 
Pa
ge 8 of 12 On Board Dia
gnostic 
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.1