AF learning A-D minimum and maximum threshholds

MFB · **Posted:** Thu Mar 01, 2012 12:46 am

Easty wrote:

Very Well Done in finding these limits!

This is how is set up my table i find it easier for me to visualise.

<data> MIN Range A </data>
<data> Max Range A / Min Range B </data>
<data> Max Range B / Min Range C </data>
<data> Max Range C / Min Range D </data>
<data> Max Range D </data>

Thanks Heaps keep up the good woork!

Yup that is easier to understand. :-)

My take on not making close loop affect open loop is to adjust af learning ranges A 0 to 10, B 10 to 40 , c 40 to 80, D 80 above. Knowing that max learning is 80, D never really learns thus not affecting Open loop. Changing max learning from 80 to 39 (given 40 is the min of D in stock) will make you loose what the ecu can correct between 40 to 80 g/s which is still close loop most of the time.

wrxt4cy · **Posted:** Fri Mar 02, 2012 6:26 pm

I added the new tables to my definition file and it looks correct for my rom: 2011 USDM STi

Now I'm thinking about how to use these values. It would seem to me that you would want at least some learning to apply to open loop to account for differences in fuel. I'm running E85 so this is even more of an issue in this case. I might dial my max down some and see if it reduces the D range over compensations that I see sometimes.

dschultz · **Posted:** Fri Mar 02, 2012 6:39 pm

Easty wrote:

Very Well Done in finding these limits!

This is how is set up my table i find it easier for me to visualise.

<data> MIN Range A </data>
<data> Max Range A / Min Range B </data>
<data> Max Range B / Min Range C </data>
<data> Max Range C / Min Range D </data>
<data> Max Range D </data>

Thanks Heaps keep up the good woork!

I'm not a fan of this format as the min and max do not define table values used to manipulate the AF Learning view ranges.

throttlehappy · **Posted:** Fri Mar 09, 2012 4:15 am

Hex Editor Search for: 3FCCCCCC 40B33333 41200000 42200000 42A00000

3FCCCCCC is Min Threshold
42A00000 is Max Threshold

This works with all DBW ECU's I have tested

Th3Franz · **Joined:** Wed Jun 03, 2009 2:20 am **Posts:** 52

Can you post the addresses for A2WC522N? I don't think NSFW has these in his experimental thread

td-d · **Posted:** Tue Jul 17, 2012 4:07 pm

A2WC522N

Min. C7080
Max. C7090

Th3Franz · **Joined:** Wed Jun 03, 2009 2:20 am **Posts:** 52

Sweet, thanks td-d.

throttlehappy · **Posted:** Tue Jul 24, 2012 4:34 pm

For those of you wanting to find these at home...

Open EcuFlash
Click but do not open the AF#1 Learning Range table
Right click and select Edit Map
There will be a 5 digit value
Min Value is 00004 less than that value(so if AF#1 Range table value is 2F4B4 then AF Min is 2F4B0)
Max Value is 00010 more than Min Value(so 2F4C0) which is also 0000C more than AF#1 Range table value.
The last value will always be a 4,8,C or 0(zero)

mikes · **Joined:** Sun May 02, 2010 1:41 am **Posts:** 22

AZ1E400C

Min: C7370
Max: C7380

Merp · **Joined:** Thu Jul 23, 2009 5:46 pm **Posts:** 863

All of these pushed to the Github Alpha repo here: https://github.com/Merp/SubaruDefs/tree/Alpha

Sanity checks were performed on the tables and a template is provided.

Current roms with this Alpha definition:

AE5IB00V
A2ZJB10J
A2ZJB11J
A2UJ000J
A8DH200X
AZ1G101N
AZ1G201G
A8DH200V
AZ1J500J
A2UG000J
AE5I910V
A2ZJ710J
AZ1E400C
A2WC522N
AZ1G701I
AZ1G201I
AZ1J500G

mrf582 · **Posted:** Fri Sep 07, 2012 2:21 am

A2ZJ700J

Code:

<table name="Af learning Min threshhold" address="5b71C" type="1D" level="1" scaling="rawecuvalue"/>
<table name="Af learning Max threshhold" address="5B72C" type="1D" level="1" scaling="rawecuvalue"/>

Min = 1.6
Max = 80.0

Merp · **Joined:** Thu Jul 23, 2009 5:46 pm **Posts:** 863

^^ Pushed to git Alpha repo.

alpine9000 · **Joined:** Fri Oct 14, 2011 2:40 am **Posts:** 34

AZ1G900C

Code:

<table name="A/F #1 Learning Min Threshold" address="C78C8"/>
<table name="A/F #1 Learning Max Threshold" address="C78D8"/>

<table name="A/F Learning #1 Min Threshold" storageaddress="0xC78C8" />
<table name="A/F Learning #1 Max Threshold" storageaddress="0xC78D8" />

Min = 1.6
Max = 80.0

Found using "A/F Learning #1 Airflow Ranges" -4/+C

mike6789 · **Joined:** Tue Jan 26, 2010 9:21 pm **Posts:** 16

is this any different than A/F Learning #1 Limits?? Or is it just useful for picking out A, B, C, D? If I just change my A/F learning limits to 3% that will apply to D as well, correct?

td-d · **Posted:** Thu Dec 13, 2012 6:45 am

mike6789 wrote:

is this any different than A/F Learning #1 Limits?? Or is it just useful for picking out A, B, C, D? If I just change my A/F learning limits to 3% that will apply to D as well, correct?

It's different in that it's MAF airflow based as opposed to percentage - it's basically the outer limits of the learning ranges - whereas the AF#1 learning limits is the maximum / Minimum of the actual % that can be applied.

RomRaider

AF learning A-D minimum and maximum threshholds

Who is online