AF learning A-D minimum and maximum threshholds

throttlehappy · **Posted:** Wed Feb 22, 2012 12:05 pm

td-d wrote:

Argh... I was requested to put up a Romraider definition, and I cannot get it to show up in Romraider, no matter what I do. Dale - could I ask you a favour, to post up a template for it to show up with the one of the roms above that people could cut and paste their addresses into?

Can I suggest?

ADMIN: deleted erroneous RR def...

throttlehappy · **Posted:** Wed Feb 22, 2012 12:14 pm

Fixed a small spelling error

td-d · **Posted:** Wed Feb 22, 2012 12:55 pm

Ok, confirmed

I have indeed found the AF#3 Rear O2 correction limits. Stock is set to 50% (!), so it's always on basically. I set it to 1% to test, and stuck nicely to those limits. I will start a new thread.

MFB · **Posted:** Wed Feb 22, 2012 2:24 pm

td-d wrote:

Happy to find them for any other roms - as a tip to any other IDA'ers on here - the values are basically adjacent to the AF learning ranges. Seems stock is 1.5999 min and 80 max on most roms.

Hi,

For AZ1G101N, I see min at 74.76 and max 78.08. My current Af learning #1 flow ranges are stock 5.6 10 and 40. Its odd to have a min and max value like that. Thoughts?

td-d · **Posted:** Wed Feb 22, 2012 2:59 pm

That's not correct - don't make edits with that. Working on your definitions to see what the issue is.

td-d · **Posted:** Wed Feb 22, 2012 3:01 pm

Cheers - thanks Throttlehappy - much appreciated!

td-d · **Posted:** Wed Feb 22, 2012 3:06 pm

Ok - that's odd, but on some roms, the massairflow scaling throws out those erroneous values.

If you change it to "rawecuvalue" the correct values will pop up - minimum of 1.6 and max of 80.

Mark - here's your corrected one for AZ1G101N:

<table name="Af learning Max threshhold" address="c7740" type="1D" level="1" scaling="rawecuvalue"/>

<table name="Af learning Min threshhold" address="c7730" type="1D" level="1" scaling="rawecuvalue"/>

td-d · **Posted:** Wed Feb 22, 2012 3:23 pm

There's definitely something borked with my Romraider definitions, even with ThrottleHappy's neat RR definitions above, I'm not getting it. Too many experimental variables chucked in there :lol:

dschultz · **Posted:** Wed Feb 22, 2012 4:53 pm

Here's the RR def.
Paste this just below the "A/F Learning #1 Airflow Ranges" table in your CALID section (not in the 32BITBASE section).

Code:

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

Then update the storageaddress value 0x?????? to the correct hex address for your CALID.

Paste these lines into the 32BITBASE CALID below the "A/F Learning #1 Airflow Ranges" table.

Code:

<table type="2D" name="A/F Learning #1 Min Threshold" category="Fueling - AF Correction / Learning" storagetype="float" endian="little" sizey="1" userlevel="4">
  <scaling units="Mass Airflow (g/s)" expression="x" to_byte="x" format="0.00" fineincrement=".1" coarseincrement="1" />
  <table type="Static Y Axis" name="Capped Limit" sizey="1">
    <data>Min Threshold</data>
  </table>
  <description>Minimum required airflow for A/F Learning #1 Airflow Ranges to update.</description>
</table>
<table type="2D" name="A/F Learning #1 Max Threshold" category="Fueling - AF Correction / Learning" storagetype="float" endian="little" sizey="1" userlevel="4">
  <scaling units="Mass Airflow (g/s)" expression="x" to_byte="x" format="0.00" fineincrement=".1" coarseincrement="1" />
  <table type="Static Y Axis" name="Capped Limit" sizey="1">
    <data>Max Threshold</data>
  </table>
  <description>Setting the maximum threshold to lower than the D Min Range value of the A/F Learning #1 Airflow Ranges causes the open loop fuelling to ignore the D learned correction value.</description>
</table>

dschultz · **Posted:** Wed Feb 22, 2012 11:44 pm

td-d wrote:

Here's a trick that is likely to work for most of the roms. In ecuflash, open up the AF learning range tables, and check what the address is.

That address minus hex 4 is the minimum. That address plus hex C is the maximum. Use calc in 'programmer' mode.

I have not looked really close at this, but do you think that the value at 0x14 below the range table address is a minimum sensitivity value to allow processing of correction changes?

I also see there are two other values which are fed into the smoothing subroutine. One is in the subroutine data but the other is at 0x10 below the range table address.

td-d · **Posted:** Thu Feb 23, 2012 3:50 am

Out of town for a couple of days, so no access to Ida at the moment. Didn't look too closely at the routine, quite possible. Pretty lengthy routine from what I recall.

There's definitely a smoothing factor somewhere (that has been incorporated into the COBB SD patch) that I'd also like to find. Some of these routines are immensely long and convoluted (especially with all the indirect referencing). I have to open up simsh and Ida side by side and watch what's happening line by line.

2bfi · **Joined:** Fri Dec 25, 2009 12:46 pm **Posts:** 93

If you can spare the time, AZ1J500G EDM '11 STI, please.

TIA

td-d · **Posted:** Fri Feb 24, 2012 7:07 pm

2bfi wrote:

If you can spare the time, AZ1J500G EDM '11 STI, please.

TIA

Max - C8038
Min - C8028

2bfi · **Joined:** Fri Dec 25, 2009 12:46 pm **Posts:** 93

td-d wrote:

2bfi wrote:

If you can spare the time, AZ1J500G EDM '11 STI, please.

TIA

Max - C8038
Min - C8028

Thanks!

As with Mark's problem above, it showed min at 74.76 and max 78.08. I changed scaling to rawecuvalue as you instructed in the post above. It's perfect at min 1.6, max 80.

I looked into ecuflash's scalings and saw there is a MassAirflow(g/s) which gives the wrong value, and a MassAirflow(g/s)1 which give the right value.

So I modified it to:

Code:

 <table name="Af learning Max threshhold" address="C8038" type="1D" level="1" scaling="MassAirflow(g/s)1"/>
 <table name="Af learning Min threshhold" address="C8028" type="1D" level="1" scaling="MassAirflow(g/s)1"/>

It's just window dressing but it works.

Easty · **Posted:** Sat Feb 25, 2012 6:48 am

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!

RomRaider

AF learning A-D minimum and maximum threshholds

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