Test condition:
Engine running.
No faults stored.
Engine temperature above 80 °C.
Battery voltage above 11.5 V.
No leaks in the exhaust system.
All electrical loads switched off.
Note:
Used to test the lambda probe after the catalytic converter.
The basic setting procedure may take a few minutes.
Procedure:
Choose the function: Lambda probe after catalytic converter, readiness test.
Press and hold down the brake pedal.
The engine control unit now increases the engine speed.
The diagnostic status field will change from ”Test off” to ”Test on”.
Read off the lambda probe after the catalytic converter. Prescribed value 0.00-1.00 V.
The diagnostic status field must change from ”Test on” to ”B1-S2 OK!. / B1-Se not OK!”.