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:
Used to see the aging of the lambda sond (oscillation time). If it is too high, the sond is worn out.
The basic setting procedure may take a few minutes.
Procedure:
Start the function.
Engine speed 1800-2200 rpm.
The temperature of the catalytic converter must be at least 350°C.
The diagnostic status field will change from ”Test off” to ”Test on”.
Test may take several minutes.
Maintain the engine speed until the diagnosis status field shows ”B1-S2 OK! / B1-S2 not OK!”.
If the specifications are not attained, interrogate fault memory.
Exit function.