Break-thru: Reading ACD ECU with EcuFlash
 

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!!!

Good stuff. Hopefully someday you will be able to launch an ACD evo at the track on VHT and not cause the TX to push its way out of its case and into the side of the trans, basically destroying everything in the drivetrain in one shot.

Cant wait to see future development.

I have a 2.0 cable and 9 if you need any help with testing.

Yay! I have a spare ACD ECU so I'll try and find some time to start playing with this!

Just sent an email to Colby @ Tactrix asking if there is anything he can do to further this along.

^win.

this is def. good news - especially if it will eventually be done w/o removing the acd ecu....I may be upgrading to the OP2.0 sooner than later now.

Great stuff happening all around us {thumbup}

I noticed the ACD is a H8!!! Though mitsu stopped used them in 2001.

Could someone give some more info on the physical hook up of the ACD and operation?
Might help dissemblers.

Like connected to TPS, RPM, etc? Outputs PWM to control solenoid? Connected to main ecu?

Which table/routine would be most useful to tuners?



(Acamus's script is choking on the nuls (FFFFFFFF) in the Vector Table, I think.)

(Be careful when first flashing these, the 7203Fs are easy to brick, and EcuFlash had issues with them for a while.)

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Yes- let me know if I can do anything to help. I had considered doing the ACD years ago, but I didn't have a working H8 kernel at the time. Since I don't own an Evo, I eventually forgot about it. A couple of comments:

* Your pin numbering of the OBD connector in your image is mirrored, which might confuse some people. Pins 4 and 5 are ground, Pin 7 is the K line, Pin 16 is battery voltage.

* I will need to look at my Evo8 wiring diagrams at work, but there is a possibility that the init line for the ACD goes to OBD plug - it may be possible to do this flashing without any special wiring. I'll check and let you know.

Ok, i made some testing and the writing is also working perfect. I read and write and read and compare several times to be sure that what i write goes inside the ecu.

No problems until now. Next step is to verify if the Evo IX ACD ECU works the same.

I hope that now people will start reverse-engineer this ECU.

S.

Not really chocking :P
follow the thread for the pinout.

I believe it is on PIN 13

@ Colby: I already done that and the flash voltage doesn't go to this ECU. I looked today all day on the electrical schematics of the Evo 7 and 8. If we want, we just need to route a wire to that pin.

I know that the numbers are mirrored but i told everyone that i put the schematics to connect directly on the pins of the OP.

I will post later all the pin-out of the ACD ECU for people to be easier to dissasembly.


Now, i tell you my experience in tuning ACD ECUs (i talk about MOTEC and GEMS). You only have 6 maps, 2 for every program selected from the button.

One for acceleration periods and one for braking periods with speed vs tps and in the table is the procent for locking the differential.

And a throttle value for 0% TPS and 100% TPS

If I use the script, I get every single instruction defined as a function.

Do you get the same?