1997 AUDI A4 light

24-187


Vacuum diagram
1 -
to EVAP canister
2 -
Evaporative Emission (EVAP) canister
purge regulator valve -N80-
3 -
Check-valve for EVAP canister
between EVAP canister and intake
manifold before turbocharger Installation position (light/dark side): Arrow
points in direction of flow, as shown in
figure.
4 -
Air cleaner housing with Mass Air Flow (MAF) sensor -G70-
5 -
Turbocharger
6 -
Combination valve for secondary air
injection (AIR)
Pa
ge 1 of 5 Vacuum dia
gram
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.6

24-188


7 -
Fuel pressure regulator
8 -
To brake booster
9 -
Check-valve
Between brake booster and intake manifoldInstallation position (light/dark side): Arrow
points in direction of flow, as shown in
figure.
10 -
Vacuum booster
11 -
Check-valve Between brake booster and intake manifoldInstallation position (light/dark side): Arrow
points in direction of flow, as shown in
figure.
Pa
ge 2 of 5 Vacuum dia
gram
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.6

24-189


12 -
Vacuum reservoir
Installation location: Under wheel housing
liner in front left wheel housing
13 -
Secondary Air Injection (AIR) solenoid
valve-N112- Installation location: Below intake manifold
14 -
Crankcase ventilation
15 -
Check-valve between Leak Detection Pump (LDP) and
intake manifold Installation position (light/dark side): Arrow
points in direction of flow, as shown in
figure.
16 -
to Leak Detection Pump (LDP) -V144-
Pa
ge 3 of 5 Vacuum dia
gram
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.6