[OhNineSTI]

I think it would be cool to try and remove what seems to be a locked COBB tune, while waiting for the standalone.

Anyone know how to unCOBB or unbrick the ECU?
I am fine with soldering if that needs to be done.

The instructions on the Tactrix site are not usable.

 

[kopele]

Look at this thread: https://forums.nasioc.com/forums/showthread.php?t=2200443
But you'll be restoring a stock ROM, which you weren't sure about.
Keep in mind I'm only guessing about it being locked down, just don't know what else it could be.

 

[OhNineSTI]

The unbricking path was too difficult, as it looks like creating a PCB from scratch. Curious why a premade does not exist.

But the Link arrived and got it all wired up and installed.
Just need to figure out how to install an IAT and Wideband before first start.

 

[OhNineSTI]

I have been posting on the Link forum for direct tech support.
This path is proving to be very difficult as well.
Have been learning AFR/VE/Timing table tuning just to get this thing to run.

Here are the topics so far.

Subaru STI ECU Fault Code 49: Analog Temp 3 above Error High Value

Looking to repair fault code 49 on an 09 STI. The fault code manual says it could be a sensor that stays high when the car is off. I am unsure which part needs testing/replacing. Any help would be appreciated.

forums.linkecu.com

09 STI Connection error: 1019 LINK_NOT_RESPONDING_CORRECTLY

Getting some strange readings on first ECU connect. Connection error 1019 ECU Fault Code 64: IAT Signal Error ECU Fault Code 49: Analog Temp 3 above Error High Value Flash ECU is suggesting to flash to v1.4 from v6.27 After hitting cancel from the Flash window, the 1019 error goes away, but comes...

forums.linkecu.com

USDM Subaru STI x JDM EJ20 - Trigger Calibration Timing Light First Start

TLDR: How important is it to check timing with a timing light for a first start coming from a running stock STI ECU? There does not seem to be a timing mark on the inner, mid or outer ring of the accessory belt pulley to match up with the calibration badge next to the pulley. I purchased an analo...

forums.linkecu.com

Subaru EJ20 Single AVCS VVT and Trigger Settings

Going for first start and wanted to make sure these settings were correct. I only see an option for Quad AVCS, will that work with a single AVCS?

forums.linkecu.com

Subaru STI - APS and TPS Calibration for First Start

In the manual under section 1.8 First Time Startup #3 says to hit F12 and select the Analog tab. #3a then says TPS should span from 0 to 100% but there are no percents listed anywhere. When I do a TPS calibration, noise comes from the dash and it says calibration complete. Doing an APS calibratio...

forums.linkecu.com

Subaru STI - Wideband O2 Options/Debate

Before getting a Link, I was researching aftermarket o2 sensors and came across a lot of conflicting information. Some places said the Link supported any o2 sensor, others said it did not come with a Bosch Wideband controller onboard. The place I purchased the Link from said most should work, but...

forums.linkecu.com

Getting a bit discouraged as the learning curve here is pretty harsh.

 

[OhNineSTI]

After watching a bunch of youtube videos, its looking like this engine is a JDM STI EJ207, not the EJ20X, which is a nice surprise.

The Link is proving to be quite difficult to start off with as it needs a few aftermarket sensors to be installed before it will run, which is a catch 22 on being able to get the car to the shop to install those sensors.

I decided to return to the unbricking path and have some great news!
Got a friend that worked on Starlink to help reverse engineer the Tactrix unbrick diagrams and that user wireup from 10 years back.

We successfully got a stock ROM to upload over wired serial to USB! No more "married" ECU roadblocks!
The car runs now too! Going to be making sure no knock is present and keeping it at lambda 1 so it can get to the shop.

Will be creating a new unbrick guide once the parts arrive, should work for quite a few ECUs too!

 

[OhNineSTI]

HERE IT IS!!!

https://raw.githubusercontent.com/OhNineSTI/subaru-unbrick/refs/heads/main/Unbrick.pdf

Feel free to share and post it anywhere or make a youtube video with it.
If you come up with other ECU header pinouts or find a typo, let me know and ill add it to the repo.

 

[EZTuned]

I have:
1) Bricked STI 16 ECU
2) Your guide

Already ordered all the hardware from AdaFruit. I was wondering the same, why the hell they don't put a ZH or Molex/serial/usb connector for bench flashing?

I'm learning to solder while I wait to get all the parts. I will let you know how far I get. Thanks for the great guide, it's very clear.