Test condition:
Engine running.
No faults stored.
Engine temperature above 80 °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 probe before catalytic converter, age check.
Rev. up twice to over 5,000 rpm
Keep the engine speed between 1500 and 3900 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
Read the value columns. Required result: Lambda probe before catalysator, age check max. 1 s : diagnosis status must change from ”Test on” to B1-S1 OK!/ B1-S1 not OK!