sensor AUDI A4 1998 B5 / 1.G AWM Engine Vacuum Diagram Workshop Manual

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

24-190


17 -
Charge air cooler
with charge air pressure sensor -G31-
18 -
Throttle valve control module -J338-
19 -
Recirculating valve for turbocharger-
N249- Installation location: Below intake manifold
20 -
Intake manifold with Intake Air Temperature (IAT) sensor -
G42-
21 -
Vacuum diaphragm for boost pressure
regulation When the combination valve is opened, the
mechanical boost pressure regulation valve
in the turbocharger is opened and
secondary air is thereby channeled past
the turbocharger directly to the catalytic
converter
Pa
ge 4 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