21-42
 
  
6 - 
Turbocharger 
Check charge air pressure   Page 21
-54
7 - 
Combination valve for secondary air 
injection (AIR) 
8 - 
Fuel pressure regulator 
9 - 
To power brake booster 
10 - 
Check valve 
Installation position (light/dark side): Arrow 
points in direction of flow, as shown 
11 - 
Vacuum booster 
12 - 
To Leak Detection Pump (LDP) 
13 - 
Vacuum reservoir 
Pa
ge 5 of 8 Vacuum control s
ystem 
(en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.21.2