Repair Manual, ABS/EDL/ASR On Board 
Diagnostic (OBD), Repair Group 01       
Always switch the ignition off and disconnect 
the battery Ground (GND) strap before carrying 
out installation or repair work. 
     
CAUTION! 
     
Before disconnecting the battery, determine 
the correct coding for the anti-theft radio. 
Pa
ge 6 of 8 General information on the Anti-lock Brake S
ystem 
(ABS
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU03.45.1