Page 2 of 6
24-115
Checking for proper seal
When there is no current, the Evaporative
Emission (EVAP) canister purge regulator valve -
N80- is closed.
- Disconnect hoses from EVAP valve; harness
connector remains connected.
- Attach assisting hose to one connection of
EVAP valve.
- Connect VAS5051 tester Page 01
-7 and
select vehicle system "01 - Engine electronics".
Ignition must remain switched on for this.
- Initiate output DTM and activate Evaporative
Emission (EVAP) canister purge regulator valve
-N80- Page 01
-51
.
Display on VAS5051:
A - 1. Actuator in test
1 - EVAP canister purge regulator valve -N80-
Valve must click... ...and must open and close (can be tested by blowing into
assisting hose).
Pa
ge 2 of 6 Tank ventilation, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.3
Page 4 of 6
24-117
Checking voltage supply
Test requirements:
Fuse for the EVAP valve OK.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Fuel Pump (FP) relay OK; checking Page 24
-52
.
Note:
Voltage is supplied to the EVAP valve via the
Fuel Pump (FP) relay.
- Disconnect connector at EVAP valve.
- Connect VAG1527B voltage tester as follows:Harness connector
Terminal
Measure to
1 Engine Ground (GND)
- Operate starter briefly (engine can also start).
LED must light up.
Pa
ge 4 of 6 Tank ventilation, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.3
Page 6 of 6
24-119
If LED does not blink or if it remains constantly
lit:
- Connect VAG1598/31 test box at wiring harness
to Engine Control Module (ECM), do not connect
ECM Page 24
-19
.
If wire connection is OK: - Check the following wire connection for open circuit and short circuit to
Ground (GND) and B+: Harness connector
Terminal
VAG1598/31 test box
Socket
2 64
- Repair open circuit or short circuit if necessary.
- Replace Engine Control Module (ECM) Page 24
-22
Pa
ge 6 of 6 Tank ventilation, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.24.3
