Preconditions for the test:
Engine running.
No faults stored.
Engine temperature 60 to 120 °C.
All electrical loads switched off.
Gear selector set to P/N.
Induction air temperature below 60 °C.
Lambda regulation and tank ventilation system OK.
Note:
Catalytic converter efficiency test.
Procedure:
Choose the catalytic converter efficiency function.
Engine speed 1500…3900 rpm.
The catalytic converter status changes from ”Test off” to ”Test on”.
The temperature of the catalytic converter must be at least 300 °C.
Maintain the engine speed until the catalytic converter efficiency diagnostic status shows ”Cat B1 OK! / Cat B1 not OK!”.
Required values at test: The catalytic converter efficiency must be at least 50 %.