Test condition:
Engine running
No faults stored
No leaks in the exhaust system
All electrical loads switched off
Coolant temperature at least 80 °C
The temperature of the catalytic converter at least 350 °C
Note:
Used to see the ageing factor of the lambda probe (oscillation response). If it is to high, the probe is worn out.
The basic setting procedure may take a few minutes.
Procedure:
Choose the function: Lambda probe before catalytic converter, age check.
For vehicles to 04.01:
Raise engine speed to 1800-2200 rpm.
For vehicles from 05.01:
Depress brake- and throttle pedal.
The engine speed will raise by the engine control module to 1800-2200 rpm.
The status field will change from "Test off" to "Test on".
Read off the value columns. Required result: Period 0.5 to 2.5.
The diagnos status field change from "Test on" to "B1-S1 ok" / "B1-S1 not ok"
If the specifications are not attained, interrogate fault memory.
Exit function.