Test condition:
Engine running.
No faults stored.
Engine temperature above 80°C.
Intake air temperature below 60 °C.
No leaks in the exhaust system.
All electrical loads switched off.
Gear selector set to P/N.
Note:
Used to check idling.
Idling, ignition advance/retard and CO value are not adjustable.
The idling speed is set by the control unit.
The CO value is controlled by the lambda regulation.
In basic setting mode, the carbon canister valve is closed and the AC compressor is switched off.
Procedure:
Start the function.
Rev up the engine and let it idle for two minutes.
Read off the engine speed signal. Prescribed value 700-820 rpm.
On completion of basic setting, the carbon canister valve is activated and the AC compressor is switched on.