Volkswagen Passat 1995 Official Factory Repair Manual page 2043

EVAP canister system
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Checking proper seal
If a small or large leak was recognized during the
test of EVAP canister system, proceed as
follows.
- Remove Leak Detection Pump (LDP) -V144-
and seal connection piece to vent valve on
EVAP canister Page 20-32
system components (vehicles with Leak
Detection Pump), removing and installing.
- Repeat function test.
If malfunction persists:
- Check whether fuel filler cap of fuel filler tube is
completely closed or whether the seal leaks;
replace if necessary.
- Check whether flange of Fuel Pump (FP) unit or
sealing ring is leaking; replace if necessary
Page 20-11 , Fuel Pump (FP) unit, removing and
installing.
- Repeat function test.
Page 14 of 22
20-41
, EVAP canister
12/6/2004