Under normal warm engine operating conditions, the idle open cycle ratio changes from high to low to achieve rated idle speed.
It may happen that due to the spread of performance (break-in, engine contamination.), the value of the degree of cyclic opening is close to the upper or lower limit.
The adaptive idle cycling degree correction compensates for slow changes in engine air demand so that the idling cycling degree is set to the average nominal value.
This correction is only effective if the coolant temperature is above 75°C, 60 seconds have passed since the engine was started and the engine is in the idle speed control phase.
Parameter interpretation
In case of excess air (due to air leakage, violation of the adjustment of the throttle stop, etc), the engine idle speed is increased, the idle cyclic opening degree value is decreased to return to the rated idle speed, the adaptive idle cyclic opening degree correction value is reduced to return to the average value of the idling cyclic opening degree.
With a lack of air (dirt etc..) the opposite situation occurs: the degree of cyclic opening at idle increases, as does the adaptive correction value, in order for the engine to go to idle.
Attention! After deleting data from the ECU memory, it is necessary to start, stop. and then let the engine idle. This is necessary so that the adaptive correction can recover correctly.