Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 80 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Automatic gearbox set to ”P/N”.
Note:
Used to see the ageing factor of the lambda sond (oscillation response). If it is too high, the sond is worn out.
The basic setting procedure may take a few minutes.
Procedure:
Choose the function: Lambda probe after catalytic converter, age check
Engine speed 2300…2800 rpm.
The diagnosis status changes from ”Test off” to ”Test on”.
The temperature of the catalytic converter must be at least 350°C.
Maintain the engine speed until the diagnosis status field shows ”B1-S2 OK! / B1-S2 not OK!”.