Test condition:
Engine idling.
No faults stored.
Engine temperature above 80°C.
Intake air temperature below 60 °C.
All electrical loads switched off.
Note:
For diagnosis of the catalytic converter.
Procedure:
Choose the function: Catalytic converter diagnosis.
Depress brake- and throttle pedal.
The engine speed will raise and the status field will change from "Test OFF" to "Test ON".
The temperature of the catalytic converter must be above 521 °C.
Maintain the engine speed until the diagnostic status field changes from "Test on" to "Cat B1 OK / Cat B1 not OK".
If the specifications are not attained, interrogate fault memory.
Exit function.