15-73
      
Checking activation  
    
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, 
Engine Code(s): APB, Repair Group 01
   
If LED does not blink or if it remains constantly lit:  
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, 
Engine Code(s): APB, Repair Group 24
    -  Connect VAG 1527B voltage tester between terminal 1 (+) and 2.
-  Initiate output Diagnostic Test Mode (DTM) and activate valve for 
camshaft adjustment. 
 
LED must blink.
-  Connect VAG 1598/31 test box at wiring harness to ECM, do not 
connect ECM. 
Pa
ge 74 of 99 Valve 
gear, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.15.1 
15-74
 
    
Valve 1 for camshaft adjustment -N205- and valve 2 for camshaft 
adjustment -N208-  
If wire connection is OK:  
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): APB, Repair Group 24
   
If no malfunctions are detected:  -  Check following wire connections for open circuit and short circuit to 
Ground (GND) and B+: 
Harness connector 
terminal  
VAG 1598/31 or test box  
Bushing  
2    Electrical Wiring Diagrams, Troubleshooting 
&Component Locations   
-  Repair Ground (GND) connection or open circuit if necessary.
-  Replace Engine Control Module (ECM).-  Replace mechanical camshaft adjuster.
Pa
ge 75 of 99 Valve 
gear, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.15.1