Checking The Fuel Tank Venting; Testing Activated Charcoal Filter System Solenoid Valve 1 - Skoda OCTAVIA MK1 Service Manual

Checking the fuel tank venting

Testing activated charcoal filter system solenoid valve 1

Special tools and workshop equipment required
t Vehicle system tester -V.A.G 1552 - with cable -V.A.G 1551/3-
t Handheld multimeter, e.g. -V.A.G 1526 A -
t Voltage tester, e.g. - V.A.G 1527-
t Measuring tool set -V.A.G 1594 A -
t Test box -V.A.G 1598/22-
Check tightness
In dead condition the solenoid valve is closed.
– Detach hose from activated charcoal filter solenoid valve 1 -N80-.
Connect a suitable manometer and a compressed air device (air pump) to the solenoid
–
valve.
– Generate a visible air pressure.
Initiate an actuator diagnosis and select the activated charcoal filter solenoid valve 1
–
-N80- → Chapter.
When the solenoid valve is opened the displayed air pressure must clearly drop and when
–
it is closed it must clearly rise again, if not replace the solenoid valve.
Inspect solenoid valve -N80- electrically
– Pull out plug at the valve.
Perform a resistance measurement with the handheld multimeter between the valve
–
contacts.
Specified value: 22 to 30 Ω.
– If the specified value is not reached, replace the solenoid valve.
Test voltage supply of the solenoid valve -N80-
Note
The voltage supply for the solenoid valve is performed via the fuel pump relay.
Test condition
l Fuse for ACF valve (fuse 43) o.k
– Disconnect plug at solenoid valve.
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