Link plugin Forester xt 2.5

[Denmark]

Hi all ,

have Any of you used a plugin link for a Forester instead of a wrx ? 

I Got a 2005 Forester 2.5xt that Will have a built engine and i would like to use a link plug in , im thinking i Can use a wrx104+ 

wrx 2004-2006 plugin ecu and then hopefully someone Can point me to what wires that needs to be swaped if Any , 

for the link to work out of the box 

 

let me know if anyone hot Any info before i buy a ecu for my costumer 

 

thanks

skassa 

 

 

[barge]

I am using the 04usdm STI PnP in my 04 Forrester XT and it's truly PnP.

I believe in 05 the Forrester varied from the STI. You'd have to compare the 2 pinouts and move any differences to match.

The service manuals are out there if you look.

[Adamw]

Take a very close look before committing.

I recently compared a forester ECU for another user, I dont know which year but his ECU had an "AK" code.  The connector was the same but the pinout was very different to either of our "V10" ecu's.  Our ECU's will cover most AJ, AL & AM as far as I know.

 

[Denmark]

Thanks , i have found the ecu pinout from a 2005 Forester 2.5 xt edm ,

so i Will compaire before buying , 

thanks

skassa 

[Denmark]

with the 2005 Forester xt edm i Can find online , it seems to be the same as the wrx104 link , 

but in the link manuel i Cant see the power and grounds , but if the wrx104 link cover the versions around the World it seems to be a direct plug in

[Denmark]

I have just had my costumer send me a picture of the ecu thats in the 2005 Forester xt 2005 not faceliftet , and without secondary airpump setup ,

this is the ecu 

9Z

22611AJ590

its just if the online 

[cj]

I'd reccomend have a look on jdmfsm.info and download a couple manuals within a year or 2 of yours. make a spreadsheet of all the wires in your actual ECU, then compare the wire colours to the manuals etc until you find one that matches. If its just very close, confirm continuity to a few easy wires (injectors, crank sensor, coils, tps. Then complete your spreadsheet with all the pin functions from the manual. From this, send it to the Link guys and they can compare it against the various subaru plugins and tell you which one matches.

[Quentinbbsi]

I have exactly the same ECU and the same problem, did you find a solution ?

[Adamw]

15 hours ago, Quentinbbsi said:

I have exactly the same ECU and the same problem

Can you elaborate, what is the problem you are trying to solve?

[Quentinbbsi]

Hi,
I have a Forester 2.5 xt 2005 MT with exactly the same ECU in the picture above and my tuner told me there is no solution to properly remap this ECU (and modify it the way we want) with any ECU remapping softwares.

It is a build motor with flexfuel, td04 19T² and other modifications (Electronic throttle control, tgv/egr delete and a lot of other things)
From what I read there is no plug and play solution for this ECU and we're looking to avoid changing the whole loom so what we want is to find if it is close enough to an existing link plugin ecu with the same connectors and know if we need to swap any wires in the connectors to make it work.
If we find a solution, that will unlock the possiblity to do a very precise remap and switch from MAF to SD.
I am telling you what my tuner said to me with my currently limited knowledge so there may be some imprecisions in what is said in this post.
Thank you for any help given !
Quentin

[Adamw]

The pinouts for all our ECU's are in the PC Link help file as well as a PDF version in the quickstart guide for each ecu on the Link website.  I would start by comparing the pinouts of our ecu's that have the same connector as yours (most likely the WRX104, WRX107, WRX11 and USDM WRX11 have the same connector) to see if any of the pinouts match yours.

[Quentinbbsi]

Thank you very much for your help. I am having trouble finding a reliable document showing the pinout of my ECU, do you know where I could find this information ?

[jdniss]

12 hours ago, Quentinbbsi said:

Thank you very much for your help. I am having trouble finding a reliable document showing the pinout of my ECU, do you know where I could find this information ?

Try 'jdmfsm.info' like CJ suggested above?

This one maybe?
https://jdmfsm.info/Auto/Japan/Subaru/Forester/2005/2005 Service Manual EU.pdf

Starting from Page 3,840 seems to have ECM / ECU related things..

[Quentinbbsi]

Thank you, from what I found it is very similar to the ECU from an impreza sti from 2005 or 2006 but with some notable differences and missing pins from the Forester ECU or the STI ecu :

 

Pins on the Forester XT 2005 ECU NOT PRESENT ON sti 2006 :

Exhaust gas temperature sensor : Signal B136 24, GND (sensors) B136 35
CAN communication : Signal (+) B137 18, Signal (−) B137 26
Immobilizer input/output B137 19
Immobilizer input/output B137 27
Generator control B134 22

Pins on the ECU STI 2006 NOT PRESENT on forester xt 2005 ECU

Fuel tank pressure sensor B136 21 and B136 35
Pressure control solenoid valve B134 12
Drain valve B134 13
Fuel tank sensor control valve B134 24
(fuel level sensor same on the two ECU !)
Fuel temperature sensor signal B136 12
Blow-by leak diagnosis signal B137 24
Accelerator pedal position sensor (2 missing on 6 pins : Sub power supply B136 16 and GND (sub sensor) B136 35) EXCEPT ON THE ECU STI 2005 WHICH IS THE SAME AS FXT
Cruise control set light B134 16
Resume/accel switch B136 10
Main switch B136 7

Differences between the two :

Ignition switch B137 16 (Forester)
Ignition switch B137 14 (Sti)
Fuel pump control unit : two signals going to the same pins but inverted (B137 28 and B135 27)
On sti "SET/COAST switch" B136 11 is same pin as "Cruise control command switch" on Forester XT but pin "7" also present in the column for FXT ECU

 

[jdniss]

On 1/10/2025 at 4:51 AM, Quentinbbsi said:

Thank you, from what I found it is very similar to the ECU from an impreza sti from 2005 or 2006 but with some notable differences and missing pins from the Forester ECU or the STI ecu

I'd be comparing your ECU pinout against the Link ECU pinouts that Adam suggested,
rather than comparing both Subaru ECU pinouts against each other.

That Service Manual I suggested - indicated it was for the EU market - is your vehicle maybe a JDM import that may have a slightly different pinout to the EU vehicle?