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 440 °C
Note:
For diagnosis of catalytic converter efficiency.
Procedure:
Choose the function: Lambda regulation, catalysator diagnosis.
Let the engine idle.
The status field will change from "Test off" to "Test on".
Test may take several minutes.
Maintain the idling speed until the diagnostic status field shows "Cat B1 ok /Cat B1 not ok".
If the specifications are not attained, interrogate fault memory.
Exit function.