Test condition:
Engine running.
No faults stored.
Engine temperature above 80 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Exhaust temperature above 350 °C.
Note:
Used to see the aging of the lambda sond (oscillation time). If it is too high, the sond is worn out.
During basic setting, the AC compressor is switched off and the carbon canister valve is closed.
The basic setting procedure may take a few minutes.
Procedure:
Choose the function: lambda regulation, probe before catalytic converter (aging).
Keep the engine speed between 1800 and 2200 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
Read off the value columns. Required result: Oscillation time 0 to 1 seconds: diagnosis status must change from ”Test on” to B1-S1 OK!/ B1-S1 not OK!