AF#3 (Rear O2 sensor) correction limits

td-d · **Posted:** Tue Apr 08, 2014 9:36 am

The adders are here:

Code:

ROM:00065E3C AF3_Adder_Remove:.float 0.000244 
ROM:00065E40 AF3_Adder_Add:  .float 0.000168    

Zeroing these should remove AF3 correction.

covertrussian · **Joined:** Tue Jan 28, 2014 10:48 am **Posts:** 120

td-d wrote:

Rear o2 comps for A2WD002T is at 2972C

Looks like the older STIs (pre 2007) have only the adders to AF3 correction, not the limits.

That's how the 04 Forester seems to be too. Disabling the Correction doesn't seem to zero out the AF3 at all either.

td-d · **Posted:** Tue Apr 08, 2014 9:57 am

For Ecuflash

Code:

   <table name="AF Correction 3 Adder (Increase)" address="65e40"/>

   <table name="AF Correction 3 Adder (Decrease)" address="65e3c"/>

in 32bitbase

Code:

   <scaling name="AF3_Adder" units="units" toexpr="x" frexpr="x" format="%.6f" min="0" max="255" inc="1e-05" storagetype="float" endian="big"/>

      <table name="AF 3 Correction Adder (Increase)" category="ALPHA AF 3 (Rear O2 Sensor)" type="1D" level="1" scaling="AF3_Adder"/>

   <table name="AF 3 Correction Adder (Decrease)" category="ALPHA AF 3 (Rear O2 Sensor)" type="1D" level="1"  scaling="AF3_Adder"/>

td-d · **Posted:** Tue Apr 08, 2014 10:06 am

For the A2ZJ512I

Code:

ROM:0005D558 AF3_Adder_Remove:.float 0.00049999997                                    
ROM:0005D55C AF3_Adder_Add:  .float 0.00034999999   

td-d · **Posted:** Tue Apr 08, 2014 10:09 am

A2WD010T

Code:

ROM:00065E54 AF3_Adder_Remove:.float 0.000244
ROM:00065E58 AF3_Adder_Add:  .float 0.000168

ROM:00029738 Rear_O2_Comps 

covertrussian · **Joined:** Tue Jan 28, 2014 10:48 am **Posts:** 120

Woah you rock, thanks!

norbs · **Joined:** Sat Feb 03, 2007 7:38 pm **Posts:** 75

td-d wrote:

The adders are here:

Code:

ROM:00065E3C AF3_Adder_Remove:.float 0.000244 
ROM:00065E40 AF3_Adder_Add:  .float 0.000168    

Zeroing these should remove AF3 correction.

Thanks a bunch.

Couple of questions. What are these adders? They are float values that need to be zeroed out to disable af3 correction? This on top of the limits or should I start with that first?

Also is the following correct:-

Code:

<scaling name="AF3_Adder" units="units" toexpr="x" frexpr="x" format="%.6f" min="0" max="255" inc="1e-05" storagetype="float" endian="big"/>
 <table name="AF 3 Correction Adder (Increase)" category="ALPHA AF 3 (Rear O2 Sensor)" address="65e40" type="1D" level="1" scaling="AF3_Adder"/>
 <table name="AF 3 Correction Adder (Decrease)" category="ALPHA AF 3 (Rear O2 Sensor)" address="65e3c" type="1D" level="1"  scaling="AF3_Adder"/>

td-d · **Posted:** Wed Apr 09, 2014 9:17 am

In the earlier roms, there is no limit to the AF 3 correction (only the rear o2 comps). These are adders are basically added or substracted from the AF 3 correction value - so if they are zeroed out, AF 3 correction is also zeroed.

In terms of the xml, I would put it into the 32bitbase and your xml - that way you can easily add the value for any future roms, as opposed to adding it to each rom one by one. See my syntax above.

covertrussian · **Joined:** Tue Jan 28, 2014 10:48 am **Posts:** 120

td-d wrote:

For the A2ZJ512I

Code:

ROM:0005D558 AF3_Adder_Remove:.float 0.00049999997                                    
ROM:0005D55C AF3_Adder_Add:  .float 0.00034999999   

Thank you very much, that did the trick (Along with zeroed Comp limits), AF3 stayed at 0 at all RPM's.

td-d · **Posted:** Thu Apr 17, 2014 5:34 pm

Great stuff, good to hear.

aijii · **Joined:** Sun Oct 16, 2011 3:57 am **Posts:** 150

i wonder if connecting the wideband output (0-5v) instead of a narrowband to the rear o2 input will still result in the "limp" mode that happens when you disconnect the rear o2 sensor.

rammer · **Posted:** Sat May 10, 2014 2:04 am

A8DK101X 2007 WRX?
Thanks!

rtbrjason · **Posted:** Thu May 29, 2014 9:11 am

Any chance of getting the xml for A2TB001L (08 USDM Spec B)?

PolarisSnT · **Joined:** Thu Dec 14, 2006 12:17 am **Posts:** 54

Is this available for the 04 WRX? A4TF520F

rammer · **Posted:** Tue Jun 17, 2014 12:19 pm

rammer wrote:

A8DK101X 2007 WRX?
Thanks!

bump? I'll buy you a beer or coffee. Or recommendations how I could find it w/o IDA?

RomRaider

AF#3 (Rear O2 sensor) correction limits

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