24-182
       If LED does not light up:  
     
-  Check wire connection from terminal 1 or 3 of 
connector for open circuit and short circuit to 
Ground (GND): 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations binder        
-  Repair open circuit or short circuit if 
necessary. 
      If LED lights up:  
     
Checking activation  
     
-  Connect VAG1598/31 test box at wiring harness 
to ECM, do not connect ECM   Page 24
-17
 . 
     
-  Check the following wire connections for open 
circuit and short circuit to Ground (GND) and B+:
     
Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
2   56  
4   55  
Pa
ge 22 of 44 Additional si
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.6 
24-187
       If LED lights up:  
     
Checking activation  
     
-  Connect VAG1598/31 test box at wiring harness 
to ECM, do not connect ECM   Page 24
-17
 . 
    
-  Check the following wire connection for open circuit and short circuit to 
Ground (GND) and B+: Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
2   39  
-  Repair open circuit or short circuit if necessary.
Pa
ge 30 of 44 Additional si
gnals, testin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.6