idling on 2003 Isuzu Ascender

how do adjust the idling on a 2003 assender

Asked by for the 2003 Isuzu Ascender
There is no adjustment, this is a Computer Controlled Idle system, so if the idle isn't proper, there is most likely a fault condition. Best to have the Engine Computer scanned to see what is out of balance and to see if there are any codes. Is there a Check engine Light on?