Test condition:
Engine running
No faults stored
No leaks in the exhaust system
All electrical loads switched off
Coolant temperature at least 80 °C
The temperature of the catalytic converter at least 400 °C
Note:
Used to test the lambda probe before the catalytic converter.
Procedure:
Choose function: Lambda probe before catalytic converter, age check.
Depress brake- and throttle pedal.
The engine speed will raise and the diagnostic status field changes from "Test OFF" to "Test ON".
Test may take several minutes.
Maintain the engine speed until the status field changes from "Test ON" to "B1-S1 OK / B1-S1 not OK".
If the specifications are not attained, interrogate fault memory.
Exit function.