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.
Gear selector set to P/N.
Note:
Used to test the lambda probe after the catalytic converter. The fuel/air mixture is enriched and the lambda probe voltage is observed. The probe voltage must rise.
Procedure:
Choose the function: Lambda probe after catalytic converter, readiness test.
Diagnosis status changes from ”Test off” to ”Test on”.
Observe the lambda probe before catalytic converter value. The value must rise.
Let the engine idle until diagnosis status changes from ”Test on” to ”B1-S2 OK / B1-S2 not OK”.