Test condition:
Engine running.
No faults stored.
Engine temperature above 85 °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 2.
Press and hold down the brake pedal.
Press the throttle pedal fully down.
The engine control unit increases the engine speed to about 1800 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
The temperature of the catalytic converter must be above 350°C.
Maintain the engine speed until the diagnostic status field changes from ”Test on” to ”B2-S2 OK/ B2-S2 not OK”.