Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 80 °C.
Induction air temperature below 60 °C.
All electrical loads switched off.
Automatic gearbox set to ”P/N”.
Note:
Catalytic converter efficiency test.
See readiness test
The test takes about 100 seconds. If no result is displayed after 150 seconds, change the engine speed within the limits.
Procedure:
Choose the function Lambda regulation, catalytic converter efficiency.
Engine speed 2200…2800 rpm.
The catalytic converter status changes from ”Test off” to ”Test on”.
The temperature of the catalytic converter must be at least 352 °C.
Check the amplitude. Prescribed value max 0.55 seconds.
Maintain the engine speed until the catalytic converter status shows ”Cat B1 OK! / Cat B1 not OK”.