AUDI A4 1997 B5 / 1.G EVAP Repair Manual

20-181


4 -
Bleed line
To gravity valve on fuel tank
5 -
EVAP canister Location: in bottom of spare tire well
6 -
Connecting hose LDP / EVAP canisterPressure side
7 -
Air filter For LDP
8 -
LDP -V144 Location: in left rear wheel house behind
wheel well Page 20
-130

9 -
Vacuum hose
LDP / throttle actuator control module
10 -
T - piece Location Fig. 1
Pa
ge 61 of 65 EVAP s
ystem, servicin
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20-182


The T-piece -arrow- is located between the engine and firewall. Fig. 1 T - piece Location
1 - To the EVAP canister
2 - to LDP -V144-
Pa
ge 62 of 65 EVAP s
ystem, servicin
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11/18/2002 htt
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yp
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pair&id=AUDI.B5.GE04.20.5

20-183


EVAP system leak detection circuit,
schematic diagram (vehicles with 2.7 ltr.
turbo engine)

Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
1 -
To air intake before both turbo chargers
2 -
Check valve Installation position: Arrow at housing
indicates flow-through direction.
3 -
Evaporative Emission (EVAP) canister
purge regulator valve -N80- Location: On right side of engine
compartment Checking:
4 -
Vent line
From EVAP canister to EVAP canister
purge valve regulator valve -N80 Installation position: On right side on
vehicle under-side. Attached to fuel tank.
Pa
ge 63 of 65 EVAP s
ystem, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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yp
e=re
pair&id=AUDI.B5.GE04.20.5

20-184


5 -
Vent valve
To gravity valve at fuel tank
6 -
Evaporative Emission (EVAP) canister Location: At bottom of spare tire well
7 -
Connecting hose Leak Detection Pump (LDP) /EVAP
canister Pressure side
8 -
Air cleaner For Leak Detection Pump (LDP) -V144-
9 -
Leak Detection Pump (LDP) -V144- Location: In left rear wheel well under
wheel well liner Removing and installing Page 20
-162
10 -
Vacuum line
To Leak Detection Pump (LDP) -V144-
Pa
ge 64 of 65 EVAP s
ystem, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.5

20-185


11 -
Vacuum reservoir
For Leak Detection Pump (LDP) -V144-Location: in left front wheel well
12 -
Check valve Installation position: Arrow at housing
indicates flow-through direction.
13 -
To intake manifold at top rear
14 -
To intake manifold at top
15 -
Check valve Installation position: Arrow at housing
indicates flow-through direction.
Pa
ge 65 of 65 EVAP s
ystem, servicin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.5