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.
Note:
Used to test the lambda probe.
The basic setting procedure may take a few minutes.
Procedure:
Choose the function: Lambda probe after catalytic converter, cylinder bank 1.
Keep the engine speed between 3000 and 4000 rpm.
The temperature of the catalytic converter must be above 320°C.
The diagnostic status field will change from ”Test off” to ”Test on”.
Maintain the engine speed until the diagnostic status field changes from ”Test on” to ”B1-S2 OK/ B1-S2 not OK”.