This function is used to test the tank ventilation system. By alternately letting the coal canister valve be closed or active ("active" approx. 220-900 seconds open and approx. 70 seconds closed) it is possible to assess the tank ventilation system.
Test conditions:
Engine idling.
No faults in the system.
Engine temperature above 80°C.
Gear in position P/N.
Procedure:
Select the function: "Tank ventilation system", press "OK".
Switch between coal canister closed or active using the buttons in the function.
When finishing, the coal canister valve is activated automatically.
If the function fails, check the test conditions and repair any faults.