Difference between Direct and Learned Idle Airflow

[joecar]

So I think I figured most of this out, see below:

B4515 - Direct Airflow IS Proportional idle - makes direct airflow adjustment based on error over B4509.
B4514 - Learned Airflow IS Integral idle - updates learned airflow based on error over B4508. This value is added to desired airflow based on conditions.
B4512 - Filtered RPM Airflow Correction IS Derivative. Looks at rate of change as errors approaches 0.

If anyone has anything to add in, feel free.

Good job

after you posted this thread (you can see my knowledge level of it in post #2, in between the parentheses), I started reading and re-readingall the descriptions for the idle tables/parameters, it did make my head spin in 3 planes...

I really appreciate you sharing your conclusions, thanks I will sticky this thread.