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 see the aging factor of the lambda sond (oscillation response). 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 factor
Keep the engine speed between 2300 and 2800 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
Read off the value columns. Required result: Aging factor 0.5 to 2.5: diagnosis status must change from ”Test on” to B1-S1 OK!/ B1-S1 not OK!