Preconditions for the test:
Engine idling.
No faults stored.
No leaks in the exhaust system.
Engine temperature above 85 °C.
All electrical loads switched off.
Automatic gearbox set to ”P/N”.
Throttle cable adjustment OK.
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 the basic setting mode, the carbon canister valve is closed, the air conditioning is switched off and the lambda adaption is initialised.
Procedure:
Choose the idling check function.
Note the speed signal, idling. Prescribed value 650-750 rpm.