Rear O2 sensor closed loop fueling target limits

rhino6303 · **Joined:** Sun Feb 06, 2011 10:12 pm **Posts:** 41

I searched through the github releases and couldn't find the correction address. Could someone please post the address for E2Z101G? Thanks.

unknown001 · **Joined:** Wed Apr 23, 2008 3:46 am **Posts:** 36

been searching for AE5IB40L on github and both threads with no luck. can someone help with the correct locations for this rom?

td-d · **Posted:** Sun Dec 20, 2015 12:02 am

unknown001 wrote:

been searching for AE5IB40L on github and both threads with no luck. can someone help with the correct locations for this rom?

Code:

ROM:00034320 AF_3_Correction_Limits
ROM:00032748 Closed_loop_fueling_target_comp_RearO2

TBX · **Joined:** Tue Jan 05, 2016 6:12 am **Posts:** 2

Can someone please verify?

AE5IB00L
AF 3 CL Target Compensation Limits : 32850
AF 3 Correction Limits : 34c5c
AF 3 Learning Thresholds : 34428 <- questionable

Pretty sure comp and correction limits are correct, just not certain about thresholds as I didn't observe any change in behavior.

Big, big thanks for the effort and level of detail in putting this together.

td-d · **Posted:** Fri Jan 08, 2016 4:24 pm

Your AF3 correction and learning thresholds are swapped.

TBX · **Joined:** Tue Jan 05, 2016 6:12 am **Posts:** 2

td-d wrote:

Your AF3 correction and learning thresholds are swapped.

Awesome, thanks for taking a peek!

Bamofo · **Joined:** Mon Jul 02, 2007 11:46 am **Posts:** 430

TD any way you can find these for me on a USDM 2010 WRX - az1g701v

05Pzev · **Joined:** Sun Jan 03, 2016 2:05 pm **Posts:** 217

My rom has 4 returns of 3F 00 00 00 BF 00 00 00 . This is a 05 U5 car with 5 O2 sensors . (5th / rear o2 sensor may not do anything for fueling... for what it's worth, it is different from the other 2 rear o2 sensors).

I am thinking that the 4 returns are Correction and compensation for AF3 and AF4. Any way to tell for sure?

By the fact that they are the only +.5/-.5 values, and these values exist for both correction and compensation for each rear O2 (AF3 and AF4) I'd imagine these must be them but would love some confirmation. Thoughts?

GWFXT · **Posted:** Wed Aug 16, 2017 6:06 am

For 2011 ADM Forester XT S-Edition AZ1J500V

<table name="AF 3 CL Target Compensation Limits" address="305d4">
</table>

rozsko · **Joined:** Tue Jul 25, 2017 9:29 pm **Posts:** 11

Could someone check these addresses for my rom please?
A8DK100Z - 07 EDM STi
Thanks in advance.

rozsko · **Joined:** Tue Jul 25, 2017 9:29 pm **Posts:** 11

rozsko wrote:

Could someone check these addresses for my rom please?
A8DK100Z - 07 EDM STi
Thanks in advance.

In this thread or in the other one someone mentioned, that one these 0.5, -0.5 addresses is for AF Learning#1. Because in my rom there are only 3 occurrences of these values and I already figure out the correction limits address, I thought I will give it a try and test this out.
#029A60 is the correction limits
#029F5C seems to be the AF Learning #1 limits as AFL#1 was deactivated when I logged it once I zerod these out.
#02B360 This is the only one left, so this must be the closed loop fueling compensation targets.
On the other hand, I would still appreciate if someone could confirm the same.
Thanks

The Lorax · **Joined:** Tue Nov 04, 2014 11:51 am **Posts:** 219

rozsko wrote:

Could someone check these addresses for my rom please?
A8DK100Z - 07 EDM STi
Thanks in advance.

In this thread or in the other one someone mentioned, that one these 0.5, -0.5 addresses is for AF Learning#1. Because in my rom there are only 3 occurrences of these values and I already figure out the correction limits address, I thought I will give it a try and test this out.
#029A60 is the correction limits
#029F5C seems to be the AF Learning #1 limits as AFL#1 was deactivated when I logged it once I zerod these out.
#02B360 This is the only one left, so this must be the closed loop fueling compensation targets.
On the other hand, I would still appreciate if someone could confirm the same.
Thanks

Based on td-d's work from here and here

Code:

29A60 AF_3_Correction_Limits_High:.float 0.5
29A64 AF_3_Correction_Limits_Low:.float -0.5

27AE0 AF_3_CL_Target_Compensation_Limits_Low:.float -0.5
27AE4 AF_3_CL_Target_Compensation_Limits_High:.float 0.5

td-d, sent you an email, did you receive it?

Zaid · **Posted:** Tue Apr 03, 2018 6:24 am

Hi Guys,

Can someone help me

find the address for ROM A2ZJD00B 2003 JDM legacy GT
I have no skills in this but I have been driving with no rear 02 sensor for years and it has been driving me nuts why my AFR would fluctuate to 13.8 until I found this today.

Will insert it in this and put in ecuflash defintion.

<scaling name="AF3 Lambda" units="Lambda Additive" toexpr="x" frexpr="x" format="%.4f" min="0" max="255" inc="1" storagetype="float" endian="big"/>
<table name="AF 3 Correction Limits - 2DF2C" category="Experimental" address="2DF2C" type="2D" level="1" scaling="AF3 Lambda">
<table name="X" type="Static X Axis" elements="2">
<data>High</data>
<data>Low</data>
</table>
</table>
<table name="AF 3 Learning Limits - 2C91C" category="Experimental" address="2C91C" type="2D" level="1" scaling="AF3 Lambda">
<table name="X" type="Static X Axis" elements="2">
<data>Low</data>
<data>High</data>
</table>
</table>

Thanks in advance.

Zaid · **Posted:** Wed Apr 04, 2018 1:24 am

Hi Guys, I did a search in an online hex editor for the string 3F 00 00 00 BF 00 00 00 in my ROM. Found these 2 addresses 27d70 & 2a0e0. Once loaded into ecuflash. I get these values. see pic. Do these look correct. Can anyone confirm they are correct. Can I Zero these out ?

td-d · **Posted:** Thu Apr 05, 2018 9:46 pm

Something's wrong with your correction values. Should be -0.50 and 0.50 - not 0 and 5.

Don't edit it until you've fixed it. These older roms also had the additives, not the correction thresholds.

RomRaider

Rear O2 sensor closed loop fueling target limits

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