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 Post subject: May be posible to convert jdm v9 sti ecu to jdm v8 sti ecu
PostPosted: Sat Jun 11, 2016 3:19 pm 
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Joined: Thu Jun 20, 2013 10:16 pm
Posts: 7
Ok iv been messing around with a few ecus trying to figure out what changed between the 2 models of ecu turns out the hardware is totaly the same except for 3 removed bridge resistors and a caps i compaired the usdm wrx ecu from an 02 wrx

I think it may be posible to hardware disable imoblizer
And convert rear cam pickups for avcs from a 3 wire sensor to a 2 wire all i need is some one with a usdm 04 sti ecu to send pics of the pcb so i can confirm the hardware removal of the imoblizer
In box me ill post my findings soon and pics with a list of parts


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 Post subject: Re: May be posible to convert jdm v9 sti ecu to jdm v8 sti e
PostPosted: Sun Jun 12, 2016 12:53 pm 
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Joined: Thu Jun 20, 2013 10:16 pm
Posts: 7
Ecu model number is 112031-7070


Ok here is a short list
On the v7 ecu i found vs the v9 04 ecu
C829 missing
Ic604
C621
J802


On the v9 u do this to make ot match the v7 ecu hardware
Move j801 jumper to j802
Add a 100smt resistor to r943
Remove
C829
Ic604
C621
move j404 to j403
move j402 to j401
move j405 to j409
move j408 to j406


After u do that use a brick ecu recovery circut to reflash a v7 sti map on the ecu should be hardware identical from what i looked at compairing the 2 ecus i think the imoblizer code is stored in ic604 i need confermation tho if the ic is present in a usdm 04 sti ecu if it is a dump of ic604 whould be nice to compare data between the 2 ecus

worst case if i cant get ecu to read on ecu flash ill swap a cpu ic from a usdm wrx to the v9 ecu if i cant get the imoblizer system to bypass so i can program the ecu


Keep me posted if u guys find any more diffrences


Last edited by mario_pic on Thu Aug 04, 2016 3:17 am, edited 1 time in total.

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 Post subject: Re: May be posible to convert jdm v9 sti ecu to jdm v8 sti e
PostPosted: Mon Jun 13, 2016 8:15 am 
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Joined: Thu Aug 03, 2006 10:40 am
Posts: 1898
interesting!


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 Post subject: Re: May be posible to convert jdm v9 sti ecu to jdm v8 sti e
PostPosted: Mon Jul 04, 2016 11:55 am 
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Joined: Thu Jun 20, 2013 10:16 pm
Posts: 7
Built flash tool just need the 16bit ecu probe points to flash it anyone here going to help me out thanks


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 Post subject: Re: May be posible to convert jdm v9 sti ecu to jdm v8 sti e
PostPosted: Fri Aug 05, 2016 8:09 pm 
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Joined: Thu Jun 20, 2013 10:16 pm
Posts: 7
intresting update guys ok got my hands on a extra wrx ecu managed to swap the cpu with rom from the v9 jdm ecu to a 02 wrx ecu and pluged my tatrix cable up to it and i got com from the ecu i was able to get the fuel pump to prime
so thst tells me the cpu is not locked on imoblizer models so i figure theres a jumper or another ic on the pcb that makes car not prime the fuel pump if im correct that means it may be posible to disable the imoblizer on ecus that are equips with it

wondering any one got the fuel pump and main relay circut pinout leads for the 05 jdm hawkeye sti wondering if thay moved the pin location with the junper aray thay got on under side of ecu


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 Post subject: Re: May be posible to convert jdm v9 sti ecu to jdm v8 sti e
PostPosted: Mon Sep 26, 2016 2:46 am 
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Joined: Mon Sep 26, 2016 2:45 am
Posts: 1
any update on this?


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