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Old 01-10-2010, 12:23 PM   #1
02SKReX
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Default JDM forester ECU pinout

Swapping a EJ20G from a 97 Forester into my Rs.

ANYONE have a fsm or ecu pinouts for a jdm forester? will a impreza be the same?
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Old 01-11-2010, 10:47 AM   #2
Jaxx
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is it a 3 or 4 plug ecu?
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Old 01-11-2010, 07:56 PM   #3
rs182
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a 97 forester 20g will be a 3 plug using the same wiring as a 20k impreza motor
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Old 01-12-2010, 06:13 AM   #4
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Or EJ20G WRX Wagon after 04-1996.
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Old 01-12-2010, 11:43 PM   #5
02SKReX
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it is a 3 plug.. thanks gents!
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Old 01-13-2010, 02:10 AM   #6
elislider
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ah yeah i forgot its the same as ej20k electronics. if you checked a ej20k ECU pinout, it would probably be the same
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Old 01-13-2010, 08:47 AM   #7
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By the way, I've got a spare non-STI EJ20K WRX ECU (IS / 22611AC722) you can have it for 50 US$ plus postage. It will give you 30 extra horses.
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Old 01-14-2010, 12:52 AM   #8
02SKReX
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postage from the netherlands? ouch lol

I'm interested however!
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Old 01-14-2010, 03:33 AM   #9
Marnix
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Postage is 24 Euro but I'm willing to part with the ECU for 75 US$ incl. postage. We could deal via Paypal.
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Old 01-14-2010, 05:42 PM   #10
rs182
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Would the IS work ok with a tdo4 and 9:1 motor? I would there would be significant timing, fuel, and boost differences? I sent you a pm as well if the OP turns down the ecu
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Old 01-15-2010, 04:54 AM   #11
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9:1 is a bit much, I'd be more comfortable running it on a 8.5 engine. With a TD04 you're not exploring the full potential of the ECU above 5k rpm.
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Old 01-15-2010, 01:13 PM   #12
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I have the same swap in my 99 rs. Pm me if there is anything I can help with. I recommend Iwire for you harness needs. He did mine and it was flawless

Last edited by rs182; 01-15-2010 at 11:52 PM.
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Old 01-17-2010, 02:55 AM   #13
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Just want to let you know I made a mistake by stating using that other WRX ECU is plug and plug, it's not because of the bigger injectors this ECU requires. Let me know if you're still interested though.
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Old 10-17-2013, 05:16 AM   #14
ma4e
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Default Replacement of ECU by Forester Sf5 JDM

Hello, you can help me? Send please pinout ECU from Forester Sf5 No. 22611-AD421 and from No. 22611-AC722 WRX RA, I want to establish on SF5 with WRX, but check burns... I will be grateful.
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Old 10-17-2013, 05:16 AM   #15
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Quote:
Originally Posted by Marnix View Post
Just want to let you know I made a mistake by stating using that other WRX ECU is plug and plug, it's not because of the bigger injectors this ECU requires. Let me know if you're still interested though.
Hello, you can help me? Send please pinout ECU from Forester Sf5 No. 22611-AD421 and from No. 22611-AC722 WRX RA, I want to establish on SF5 with WRX, but check burns... I will be grateful.
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Old 10-17-2013, 09:46 PM   #16
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I am in the middle of a forester swap into a outback sport. When I tried researching the wiring before I did my swap most people just said use WRX/ej20k wiring. I didnt like not knowing for sure that the wiring was exactly the same, since I was doing my own wiring harness work. I did find the WRX diagrams to be off in color and pinout. I found diagrams from japan for a forester and had them translated. Injectors wiring pins would be off. I cant recall exactly some of the other components that were different between the two. Doing the wiring is not that bad, as long as you have the correct information.
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Old 10-21-2013, 07:49 PM   #17
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I've got my Impreza RS running again after I put a '99 EJ205 from a JDM Forester (Unless your EJ20Gs and EJ20Ks have EJ205 as the first five digits of the engine code? in which case I don't know what I have o_O) and the ECU is a JECS 22611-AE831.

I used the V5 STI wiring diagram from PossumLink's install sheet and Powerlab's blog on Sam's swap as a guide, and apart from a few wires being different colors, everything matched pin-for-pin on the ecu connectors.

As far as I can tell, the only differences in the wrx, sti and turbo forester engines is mechanical (ei the size of the turbos, the flow rate of the injectors, the compression ratios and the forged internals in the sti). Obviously that means the ECUs have different tuning, but my point is that from my experience, they have the same number of sensors, the same number of outputs and the same pin locations on the ecus.
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Old 10-21-2013, 07:56 PM   #18
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Also, as a side note: I have a problem with my AE831 ecu. It appears that it isn't switching ground to the pressure exchange solenoid. This is causing a check engine light with code 45 (which is how I found the problem in that solenoid circuit) and also a drivability issue where I can't get on boost. I think the ecu is mistaking engine vacuum for atmospheric pressure.

Anyways, does anyone know if I could run a wrx ecu on my forester engine? Any ideas about compatibility? discrepancies in compression/boost levels? I'm trying to sort out the nitty-gritty details before I go source myself a replacement ecu.
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Old 10-22-2014, 07:47 PM   #19
panel
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Was there a link to that pin out for the 22611 AE 831 ECU anywhere ?
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