Note:
Used for system diagnosis of lambda regulation.
Test prerequisites:
Engine running.
No faults stored.
Coolant temperature at least 80 °C.
No leaks in the exhaust system.
All electrical loads should be switched off.
Procedure:
Choose the function: 'Lambda regulation, diagnosis'.
Depress brakepedal and then accelerator pedal.
The engine speed will raise and the diagnostic status changes from "Test OFF" to "Test ON".
The procedure may take a few minutes.
Maintain engine speed until the diagnostic status changes from "Test ON" to "Syst. OK! / Syst. not OK!".
If the specifications are not attained, interrogate fault memory.
Exit the function.