Preconditions for the test:
Engine running.
No faults stored.
Engine temperature above 80 °C.
Induction air temperature below 60 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Note:
Used for system diagnosis of lambda regulation.
Procedure:
Choose the function: Lambda regulation, diagnosis.
Press and hold down the brake pedal. Within a few seconds the engine control unit will raise the engine speed to 1100-1400 rpm.
The diagnostic status field will change from ”Test off” to ”Test on”.
Maintain the engine speed until the diagnostic status field shows ”Sys. OK! / Sys. not OK!”.