Test condition:
Engine running.
No faults stored.
Engine temperature above 80°C.
No leaks in the exhaust system.
All electrical loads switched off.
Automatic gearbox set to ”P/N”.
Note:
This diagnosis is initiated only when the catalytic converter temperature is above 350°C and the lambda values in data list 10 are "111".
Significance of 3 digit number block in data list 10.
xx1 Lambda regulation active
x1x Lambda probe operationally ready
1xx Lambda probe heating on
The basic setting procedure may take a few minutes.
Procedure:
Start the function.
Engine speed 1800-2200 rpm.
Keep the catalytic converter temperature above 350°C.
The diagnostic status field will change from ”Test off” to ”Test on”.
Check cycle duration, maximum 1.0s.
Maintain the engine speed until the diagnosis status field shows ”Syst. OK”.
If the specifications are not attained, interrogate fault memory.
Exit function.