Page 14 of 57
01-8
      
Connecting  
    
Notes: 
 Scan tool operating instructions    -  Locate Data Link Connector (DLC), under driver's knee bar to left side 
of steering wheel. 
-  Connect VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable to 
DLC. 
-  Switch ignition on, or start engine, depending on function to be 
selected. 
If scan tool displays do not appear as indicated:If "Error in communication link" is displayed, disconnect adapter cable 
at scan tool, reconnect, and repeat procedure. 
-  Operate scan tool and advance through program sequence by 
following display: 
-  Press button -1- to select "Rapid data transfer" operating mode 01.
-  Press buttons -0- and -1- to insert "Engine Electronics" address word 
01, and press -Q- button to confirm input. 
Pa
ge 14 of 57 On Board Dia
gnostic 
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1 
         
        
        
     
        
        Page 20 of 57

01-13
 ECM coding variations
 
Country/Emissions  
Drivetrain/Options  
Transmission  
Vehicle type  
00 
=  ------------------   0 
=  Front-wheel-drive without 
traction control (ASR)  0 
=  5-speed manual   0 
=  ------------
------  
01 
=  ------------------   1 
=  Front-wheel-drive with traction 
control (ASR)  1 
=  ------------------   1 
=  A4  
02 
=  ------------------   2 
=  All-wheel-drive without traction 
control (ASR)  2 
=  ------------------   2 
=  ------------
------  
03 
=  ------------------   3 
=  All-wheel-drive with traction 
control (ASR)  3 
=  ------------------   3 
=  ------------
------  
04 
=  ------------------   4 
=  ------------------   4 
=  ------------------   4 
=  ------------
------  
05 
=  ------------------   5 
=  ------------------   5 
=  Automatic trans. 
01V  5 
=  ------------
------  
06 
=  USA, equipped with EVAP system Leak 
Detection Pump (LDP)  6 
=  ------------------   6 
=  ------------------   6 
=  ------------
------  
Pa
ge 20 of 57 On Board Dia
gnostic 
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1 
         
        
        
     
        
        Page 21 of 57
01-14
 
Code number stucture (example)  
  
  
  
  
  
USA vehicle with Leak Detection Pump (LDP):   0   6           
Front-wheel-drive without traction control (ASR):         0        
Automatic transmission 01V:            5     
Audi A4:               1  
Code number:   0   6   0   5   1  Note:  
Vehicles with traction control (ASR) can be recognized by the ASR control light in the instrument cluster or by ABS/ASR On 
Board Diagnostic (OBD). 
       Repair Manual, Brake System On Board 
Diagnostic (OBD), Repair Group 01
   
Pa
ge 21 of 57 On Board Dia
gnostic 
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1