AF#3 (Rear O2 sensor) correction limits

td-d · **Posted:** Mon Jun 23, 2014 2:37 am

A8DK101X

Code:

2EB7C Rear_O2_Comp - these are reversed, like the older roms (i.e. -0.5 / 0.5)
30B04 AF3_correction_limits

rammer · **Posted:** Mon Jun 23, 2014 11:01 am

Thanks!

GADzik · **Joined:** Mon Nov 05, 2012 11:06 am **Posts:** 2

Hi guys, anyone knows please tell me the address for Subaru Forester EDM A2ZJ500F thanks

td-d · **Posted:** Sat Aug 30, 2014 7:28 pm

GADzik wrote:

Hi guys, anyone knows please tell me the address for Subaru Forester EDM A2ZJ500F thanks

Code:

ROM:0005320C AF3_Adder_Remove:.float 0.000244
ROM:00053210 AF3_Adder_Add:  .float 0.000168

ROM:0001E044 Closed_loop_fueling_target_comp_RearO2_max:.float 0.5
ROM:0001E048 Closed_loop_fueling_target_comp_RearO2_min:.float -0.5

spec.b dream · **Joined:** Thu Jun 18, 2009 12:23 am **Posts:** 102

A2TB001L was requested a couple times but I didn't see it posted. Any chance I can get this? Thanks!

spec.b dream · **Joined:** Thu Jun 18, 2009 12:23 am **Posts:** 102

throttlehappy wrote:

The hot restart issue can be solved, even on E85 with the Base idle Timing table and then the non AVCS Cruise top left timing value. Set the 400rpm Base Idle to 17.27, 600rpm to 16.56 and 800rpm to 15.86 then the cruise table timing needs to be 17.27.

Fighting a hot start issue on e85 with my 08 spec.b. Are these tables "Base Timing Idle Minimum" and "Base Timing Primary Cruise"?

td-d · **Posted:** Sun Sep 14, 2014 3:12 am

spec.B Dream wrote:

A2TB001L was requested a couple times but I didn't see it posted. Any chance I can get this? Thanks!

That's because it's already up on Github: https://github.com/TD-D/SubaruDefs/raw/ ... TB001L.xml

As well as the hot restart tables that will help you sort out the other issue.

spec.b dream · **Joined:** Thu Jun 18, 2009 12:23 am **Posts:** 102

Fantastic! Thanks.

SOd · **Posted:** Sat Jan 17, 2015 9:15 am

Hi,
Please help find a valid address in my A2TB100K Rom.
viewtopic.php?f=8&t=4053

355dc or 36ff0 ?

Thanks in advance

eeK · **Joined:** Sat Jan 31, 2015 3:53 am **Posts:** 1

Hi!
Could I get the rear o2 comp and AF3 addresses for D0XJ002B ?Tribeca

Thanks!

SOd · **Posted:** Sun Feb 15, 2015 5:44 am

SOd wrote:

Hi,
Please help find a valid address in my A2TB100K Rom.
viewtopic.php?f=8&t=4053

355dc or 36ff0 ?

Thanks in advance

Thank you very much for Sasha_A80

valid address in A2TB100K is 355dc

crippsdr · **Posted:** Wed Mar 04, 2015 5:15 am

Anyone got these for A4TH100H?

pyro6314 · **Joined:** Sun Dec 01, 2013 4:17 pm **Posts:** 47

wrxt4cy wrote:

Well I pulled the rear o2 sensor and replaced with my wideband. Even without the AF3 correction limits zeroed, it was still targeting 14.6 at idle. If I blipped the throttle, it would target 13.8 for a bit and then rise back up to 14.6.

I zeroed the limits and re-flashed. It still targeted 14.6 and sits on 13.8 for a bit after a blip.

I went out for a long drive and found that generally for afrs are at 14.7 (wideband & front o2) while cruising but every so often, especially after accelerating and going back to cruising, my ARFs would hang out around 13.6 for a while and eventually go back to 14.7.

My logs indicate that it was targeting around 13.6 based on corrections it was applying. I didn't actually log the fueling target.

Do you guys think my car is reacting to the missing rear o2 sensor? Based on other logs, it would seem like it is but again, I don't really know the full symptoms of rear o2 corrections.

Bamofo wrote:

pyro6314 wrote:

I am after the location of the AF3 Correction and Compensation Limits for my 06 USDM STI Rom (A2ZJE11J).

EDIT: Found only one occurrence of 3F 00 00 00 BF 00 00 00 at 2B154 assumed to be the AF3 correction limits. Will verify the effect of zeroing once my 257 swap is wired in.

That looks right. There were other mentions of the hex pattern but they werent correct!

I'm still having issues with this, I zeroed the AF3 Correction Limits from -50%/50%, and monitored the 32bit base AF3 Correction in RomRaider. It didn't appear to have any effect and the correction hovers around -0.47. I am having the same issue as wrxt4cy (years ago now) where the Closed Loop Target has a clear switch between 14.7 --> ~13.7 . There must be something else at play here besides a correction which is causing this step change in the target. It doesn't appear to be a continuous Correction or Learning value but a definite switch over.

If anyone [td-d] has any insight..

EDIT: I have no rear 02 and the relevant codes are turned off. A2ZJE11J

td-d · **Posted:** Tue Jun 16, 2015 2:46 pm

Pyro - that's because it's an older rom with the adders:

Code:

AF3_Adder_Remove C5E24 
AF3_Adder_Add    C5E28 

pyro6314 · **Joined:** Sun Dec 01, 2013 4:17 pm **Posts:** 47

Thanks for the quick reply. I'm not sure I understand how these stack up, but shouldn't zeroing the AF3 Correction limits I found make these adders irrelevant? It's interesting that they are switched on/off opposed to progressively adding/subtracting. I'm guessing at some emissions work in attempt to light up the cat.

EDIT: Unfortunately zeroing the adders didn't do it. (.0005 / .0003) What they did do, is zero my AF#3 Correction (32 bit) as logged from the 32bit base definition. Zeroing AF 3 Correction didn't appear to have an effect on my CL Target which still 'switches' from ~14.69 -> 13.7 .

RomRaider

AF#3 (Rear O2 sensor) correction limits

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