Volkswagen Passat 1995 Official Factory Repair Manual page 2042

EVAP canister system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU08.20.2
EVAP canister system for proper seal,
checking (vehicles with Leak Detection
Pump)
Function test
- Select measuring value "Test-ID 01: Tank leak
test" and check whether the specified value is
being reached Page ST-43
8: Tank leak test.
- Check specified value of tank leak test at idle.
Specified value: Test function active
Note:
During tank leak test, Engine Control Module
(ECM) limits "test function active" to approx. 12
minutes.
If the accelerator pedal is depressed during
test, the test will be aborted.
To repeat tank leak test, switch ignition off and
start engine again and let run at idle for at least
15 minutes.
- End diagnosis and switch ignition off.
If a leak is detected:
Page 13 of 22
20-40
, Diagnostic mode
12/6/2004