Test condition:
Engine idling.
No faults stored.
Engine temperature above 80 °C.
All electrical loads switched off.
Gear selector set to P/N.
The temperature of the catalytic converter at least 440 °C.
Note:
For diagnosis of the catalytic converter.
Test may take several minutes.
Procedure:
Choose the function: Catalytic converter diagnosis.
For vehicles to 04.01:
Raise engine speed to 2200-2600 rpm.
For vehicles from 05.01:
Depress brake- and throttle pedal.
The engine speed will raise by the engine control module.
The status field will change from "Test off" to "Test on".
The temperature of the catalytic converter must be above 440 °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.