Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 85 °C.
All electrical loads switched off.
No leaks in the exhaust system.
Gear selector set to P/N.
Note:
For diagnosis of the catalytic converter.
Basic setting takes about one minute.
Procedure:
Choose the function: Catalytic converter diagnosis.
Increase the engine speed to about 3000 rpm.
When the exhaust gas temperature reaches 550 °C, diagnostic status changes from ”Test off” to ”Test on”.
Maintain the engine speed until diagnostic status changes from ”Test on” to ”Cat B1 OK! / Cat B1 not OK!”.