relay AUDI A4 2000 B5 / 1.G APB Engine Evaporative Emission Syst

24-136

Checking voltage supply to Evaporative
Emission (EVAP) Canister Purge Regulator
Valve (solenoid valve)

Note:
The Evaporative Emission (EVAP) Canister
Purge Regulator Valve receives its power supply
via the fuel pump relay.

Test requirements

Fuse for EVAP valve OK

- Disconnect harness connector on Evaporative
Emission (EVAP) Canister Purge Regulator
Valve -N80.

The diode test lamp should light up.
If diode test lamp does not light up:
Electrical Wiring Diagrams, Troubleshooting & Component Locations - Connect VAG1527 diode test lamp between engine Ground (GND) and
socket 1 on connector.
- Operate starter.
- Check continuity of wiring from socket 1 to fuel pump relay via fuse.
Repair open circuit if necessary.
Pa
ge 3 of 6 Eva
porative Emission
(EVAP
) system, 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.FU04.24.3

If the diode test lamp lights up, check activation Page 24
-137
. - If wiring is OK, check fuel pump relay Page 24
-54
.
Pa
ge 4 of 6 Eva
porative Emission
(EVAP
) system, 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.FU04.24.3