Test condition:
Engine running
No faults stored
No leaks in the exhaust system
All electrical loads switched off
Coolant temperature at least 80 °C
Gear selector set to P/N.
Note:
Used for system diagnosis of lambda regulation
Procedure:
Choose the function: Lambda regulation, diagnosis
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 the correction value. Prescribed value: under 0.02.
Maintain the engine speed until the status field shows "Syst. ok / Sys. not ok"
If the specifications are not attained, interrogate fault memory.
Exit function.