Preconditions for the test:
Engine idling.
No faults stored.
Engine temperature above 80 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Note:
Used to see the lambda adaption value.
Also used when troubleshooting, by letting the carbon canister be alternately closed or active. (When active, about 220-900 seconds open / approx 70 seconds closed.)
The lambda adaption values for bank 1 and bank 2 are displayed during the basic setting procedure.
Procedure:
Choose the lambda adaption function.
Read off the value columns. Required results: additive lambda adaption (cylinder bank 1 and 2) –10 % to 10 % and multiplicative lambda adaption (cylinder bank 1 and 2) –10 % to 10 %.
Now you can also use the arrows above the value lines to alternate the carbon canister valve between closed and open.
On completion of basic setting, the carbon canister valve is activated automatically.