Break-thru: Reading ACD ECU with EcuFlash
Newbie
Joined: Jun 2009
Posts: 83
Likes: 25
From: QLD, Australia
Long story short, there wasn't any changes in this rom that would have me change the way that I tune the ACD. Gravel and Snow have had some more ACD lockup applied, but otherwise just a few coefficient changes to each mode. Nil changes to the AYC settings. Might there be an improvement for a stock vehicle using these settings...yeah, maybe.
Newbie
Joined: Feb 2017
Posts: 15
Likes: 2
From: Japan
Thank you for posting! Yes, i have studied this one a little while ago. This is also the same ECU/ROM as found in the JDM Evo9 GT.
Long story short, there wasn't any changes in this rom that would have me change the way that I tune the ACD. Gravel and Snow have had some more ACD lockup applied, but otherwise just a few coefficient changes to each mode. Nil changes to the AYC settings. Might there be an improvement for a stock vehicle using these settings...yeah, maybe.
Long story short, there wasn't any changes in this rom that would have me change the way that I tune the ACD. Gravel and Snow have had some more ACD lockup applied, but otherwise just a few coefficient changes to each mode. Nil changes to the AYC settings. Might there be an improvement for a stock vehicle using these settings...yeah, maybe.
If you have it, I want you to share it.
I know that the definition file is the same as 401403.
Reviving this for those who are interested: I hunted for patents regarding ACD and AYC and found a lot, so here are a selection. Most of them are either for other generations of Mitsubishi's rather than CT9A Evo's, e.g. ACD for the Galant VR-4, AYC for CN9A, and S-AYC, SAWC for Evo X. All apply at least some degree to Evo's 7-9 with ACD or AYC or S-AYC.
I've had these for months (retrieved from several patent sites) and just never got round to sharing them until now. I hope this stimulates a little more interest in the topic - including my own!
I read or at least skimmed through all of these. A few of us have found some rather interesting graphs and info that closely match those in our ROM's. I've got a few things I've been meaning to trial on my car since reading these and other patents and technical reviews.
I can share more if there is more interest!
I've had these for months (retrieved from several patent sites) and just never got round to sharing them until now. I hope this stimulates a little more interest in the topic - including my own!
I read or at least skimmed through all of these. A few of us have found some rather interesting graphs and info that closely match those in our ROM's. I've got a few things I've been meaning to trial on my car since reading these and other patents and technical reviews.
I can share more if there is more interest!
USE ONLY ECUFLASH 1.43.3000 VERSION FOR CORRECT WRITING
Today i managed to read out the ACD ECU of a EVO VII and a EVO VIII with OP 2.0 and EcuFlash 1.42
Unfortunately, you cannot read/write this ecu into the car, only on the bench for now. But i think that if it will gain people's curiosity, it is very easy to mod something and tune this ecu directly into the car.
You have to connect to the ECU
1 ground
2 Vcc
1 K-line
1 flashing voltage
Also you have to put ground and Vcc on the OP also. Look on the schematics and you will understand. You also need a steady 12-14 Vcc source.
Download the .xml in the archive into the ...\rommetadata\read templates
Open EcuFlash 1.42 and choose from READ -> ACD ECU.
!!! It will work only with EcuFlash 1.42 and only with OpenPort 2.0 from Tactrix!!!
Until now, i just read the ACD ECU, now i will start trying and verifying writing also.
I believe that ACD-AYC ECU is the same like this, but i have to test further.
Thank you Acamus, for giving me the idea.
Now, that everyone can read his ACD ECU, i hope that you reverse-engineering guys will start and find the maps inside and make the definitions that we need.
S.
Disclaimer:
It is a method that imply some risques. Do it on your own risque!!!
Today i managed to read out the ACD ECU of a EVO VII and a EVO VIII with OP 2.0 and EcuFlash 1.42
Unfortunately, you cannot read/write this ecu into the car, only on the bench for now. But i think that if it will gain people's curiosity, it is very easy to mod something and tune this ecu directly into the car.
You have to connect to the ECU
1 ground
2 Vcc
1 K-line
1 flashing voltage
Also you have to put ground and Vcc on the OP also. Look on the schematics and you will understand. You also need a steady 12-14 Vcc source.
Download the .xml in the archive into the ...\rommetadata\read templates
Open EcuFlash 1.42 and choose from READ -> ACD ECU.
!!! It will work only with EcuFlash 1.42 and only with OpenPort 2.0 from Tactrix!!!
Until now, i just read the ACD ECU, now i will start trying and verifying writing also.
I believe that ACD-AYC ECU is the same like this, but i have to test further.
Thank you Acamus, for giving me the idea.
Now, that everyone can read his ACD ECU, i hope that you reverse-engineering guys will start and find the maps inside and make the definitions that we need.
S.
Disclaimer:
It is a method that imply some risques. Do it on your own risque!!!
Good morning gents, having an odd issue with an ACD/AYC ECU. I can read the ECU but cannot write back to it without it failing. Is there a different kernel I need to use or is it that my new laptop has v1.44 and not one of the older versions to read write? Only seems to be an AYC related issue as I can write the USDM ECUs perfectly fine.
thanks
Aaron
thanks
Aaron
Newbie
Joined: Jun 2009
Posts: 83
Likes: 25
From: QLD, Australia
Good morning gents, having an odd issue with an ACD/AYC ECU. I can read the ECU but cannot write back to it without it failing. Is there a different kernel I need to use or is it that my new laptop has v1.44 and not one of the older versions to read write? Only seems to be an AYC related issue as I can write the USDM ECUs perfectly fine.
I'll have to double check what ECU flash version I'm using (it might be 1.43), but i've never had any issues writing any ROM to any ECU. Whether the ECU works within an incorrect ROM is another story, but it will always let you flash it.
Last edited by ROB-80E; Mar 25, 2025 at 04:30 PM.
I was able to download my ACD using the bench setup but it only shows the ROM info. No maps show up. What am I missing?
Last edited by wizzo 8; May 19, 2025 at 04:55 PM.
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