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  #1066  
Old 05-18-2011, 03:56 AM
b3lha's Avatar
b3lha b3lha is offline
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Re: Memory dump of ECU

I haven't done much with this project for a while, apart from building some custom TCUs with special shift maps.

Somebody just sent me a new software called JECScan that can log ECU and TCU parameters, and download the ROMS to a file. It's on my website for download if anyone wants to try it.




This is currently the only windows software that can download TCU rom.

I've also got some information on communicating with the cruise control unit. It uses an older protocol designed for the L-series (Leone). It needs a modified interface and special software to communicate. I'd like to make it work just for completeness, but I don't see anybody ever using it.
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1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1067  
Old 05-18-2011, 07:17 AM
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Huskymaniac Huskymaniac is offline
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Re: Memory dump of ECU

Do you get this data through the OBD port?

My son just bought an android phone and I am toying with the idea of him writing an application that can pull the Subaru Select Monitor data. There are lots of applications out there that can get OBD and OBDII data and some that get some SSM data but I haven't found one that can get the TCU data.
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Tony

1996 Subaru SVX LSi, 149,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 0W40 and 5W30 High Mileage Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, StopTech Cross Drilled Front and Rear Rotors, Akebono ProACT Brake Pads
2005 Acura RL, 128,XXX miles, Redline D4 ATF, Mobil 1 0W40 and 0W20 High Mileage Oil Blend
2009 Toyota Venza, 78,XXX, Mobil 1 5W30 High Mileage Oil
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  #1068  
Old 05-18-2011, 07:51 AM
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Re: Memory dump of ECU

Quote:
Originally Posted by Huskymaniac View Post
Do you get this data through the OBD port?

My son just bought an android phone and I am toying with the idea of him writing an application that can pull the Subaru Select Monitor data. There are lots of applications out there that can get OBD and OBDII data and some that get some SSM data but I haven't found one that can get the TCU data.
Yeah. Through the SSM connector on OBD cars. May also work on OBDII with the right cable.

I hear android runs java, so FreeSSM may work with a bit of tweaking. Maybe also ECU Tracker (formerly called JDash).
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Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1069  
Old 05-18-2011, 07:55 AM
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Re: Memory dump of ECU

If you made it for android, consider me your first customer.
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1992 Pearl White LS-L "Ruslana" #4946 - 180k on body, 95k on engine.
Mods: ECU bead crush, 15 min mod, 20 min mod, drilled/slotted rotors & Axxis ceramic brakes, SS lines, 17" Evoke F1 wheels, XS-HF137 Sony Xplod speakers, 6000k HID's (lows & fogs), resistor mod, 1" Sleek Spoiler mod, custom exhaust by svxfiles, '02 WRX aluminum racing radiator by svxfiles, Summit Racing 400# x 300# springs w/ Koni's by svxfiles, ClassGlass fiberglass hood /w scoop, Nevin's rear sway bar, '97 grille, phenolic spacers, custom LED interior lighting, custom paint.
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Work to be done: Tinted windows, clear/LED tail lights, tailbar mod, "Power Mode" mod, Supertone horns, clear corners & headlight lenses, 2 pc splitters or custom bumper, Alcyone side skirts, TruSpeed Stage III SVX Intake, Hydra, 4.44 tranny swap, JDM auto folding side mirrors, engine rebuild, super charger, STi seats, bone leather interior /w SVX emblem, dash overhaul, SVX decals, paint (stock color). Total cost?: 22k At least it's going down..
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  #1070  
Old 05-18-2011, 08:15 AM
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Re: Memory dump of ECU

Quote:
Originally Posted by b3lha View Post
Yeah. Through the SSM connector on OBD cars. May also work on OBDII with the right cable.

I hear android runs java, so FreeSSM may work with a bit of tweaking. Maybe also ECU Tracker (formerly called JDash).
Don't those programs only get some of the SSM data?
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Tony

1996 Subaru SVX LSi, 149,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 0W40 and 5W30 High Mileage Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, StopTech Cross Drilled Front and Rear Rotors, Akebono ProACT Brake Pads
2005 Acura RL, 128,XXX miles, Redline D4 ATF, Mobil 1 0W40 and 0W20 High Mileage Oil Blend
2009 Toyota Venza, 78,XXX, Mobil 1 5W30 High Mileage Oil
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  #1071  
Old 05-18-2011, 08:33 AM
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Re: Memory dump of ECU

Quote:
Originally Posted by Freeman View Post
If you made it for android, consider me your first customer.
If I can convince him to do it, I was planning on having a few people here beta test it.
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Tony

1996 Subaru SVX LSi, 149,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 0W40 and 5W30 High Mileage Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, StopTech Cross Drilled Front and Rear Rotors, Akebono ProACT Brake Pads
2005 Acura RL, 128,XXX miles, Redline D4 ATF, Mobil 1 0W40 and 0W20 High Mileage Oil Blend
2009 Toyota Venza, 78,XXX, Mobil 1 5W30 High Mileage Oil
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  #1072  
Old 05-18-2011, 09:19 AM
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Re: Memory dump of ECU

Quote:
Originally Posted by Huskymaniac View Post
Don't those programs only get some of the SSM data?
As far as I remember, FreeSSM has a definition file where you tell it what parameters you want to read and how to decode them. I know that Frank, the developer, was pulling the addresses out of a real select monitor to make sure he got them all.

It was still a bit experimental last time I tried it. I may have another go soon.
__________________
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1073  
Old 05-19-2011, 03:50 PM
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Re: Memory dump of ECU

Will my interface work for you?

Quote:
Originally Posted by b3lha View Post

I've also got some information on communicating with the cruise control unit. It uses an older protocol designed for the L-series (Leone). It needs a modified interface and special software to communicate. I'd like to make it work just for completeness, but I don't see anybody ever using it.
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  #1074  
Old 05-19-2011, 04:07 PM
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Re: Memory dump of ECU

I posted the definitions file I created for my ECUtuner software earlier on in this or one of your other threads. It includes all the Subaru Select Monitor parameters which were obtained directly from eavesdropping on the coms between an SVX ECU and genuine Subaru Select Monitor. It also includes most everything I found of interest in the ROM for tuning and modifications and a few things you had mentioned as well. It's still on the website at http://www.ecutune.com/posts/definitions.xls

Quote:
Originally Posted by b3lha View Post
As far as I remember, FreeSSM has a definition file where you tell it what parameters you want to read and how to decode them. I know that Frank, the developer, was pulling the addresses out of a real select monitor to make sure he got them all.

It was still a bit experimental last time I tried it. I may have another go soon.
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  #1075  
Old 05-20-2011, 03:31 AM
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b3lha b3lha is offline
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Re: Memory dump of ECU

Quote:
Originally Posted by longassname View Post
Will my interface work for you?
No. I need to generate a 250 hz clock on pin 4 with -5v to +5v pulses. I can generate the right signal with the FTDI interface in bitbang mode, but only between 0v and 5v.

I think I need a voltage inverter to create the -5v and a comparator to toggle the signal between -5 and +5 as the FTDI toggles between 0 and 5.
__________________
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1076  
Old 05-20-2011, 03:32 AM
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b3lha b3lha is offline
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Re: Memory dump of ECU

Quote:
Originally Posted by longassname View Post
I posted the definitions file I created for my ECUtuner software earlier on in this or one of your other threads. It includes all the Subaru Select Monitor parameters which were obtained directly from eavesdropping on the coms between an SVX ECU and genuine Subaru Select Monitor. It also includes most everything I found of interest in the ROM for tuning and modifications and a few things you had mentioned as well. It's still on the website at http://www.ecutune.com/posts/definitions.xls
Did you ever release that software? I thought you had given up on it?
__________________
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1077  
Old 05-20-2011, 07:34 AM
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Re: Memory dump of ECU

I just stopped working on it. I will presumably continue with it someday and release it (open source) so I can sell the interfaces I have sitting on a shelf (complete with select monitor harnesses).
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  #1078  
Old 05-20-2011, 06:32 PM
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Re: Memory dump of ECU

I just bought another SVX ECU for research and it wasn't quite what I expected. I think it's a very early USDM version, label is D1 rather than the usual M7.

The circuit board is slightly larger (see photo). The D1 is on the left compared with the regular D2 from my JDM on the right. The small chip in the top left corner is external ROM. I guess that when this ECU was made, the M37791 MCU wasn't yet available in a 32K version, so they had to use external.

The original firmware is 722521. At some point it has been upgraded with a chip containing the 1993 firmware 722527.

I compared the 722521 firmware with the USDM 92 firmware 722525. The timing maps and MAF scale are the same but the fuel map is very slightly different.

Attached Images
File Type: jpg D1-vs-D2-ecu.JPG (154.9 KB, 828 views)
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Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
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  #1079  
Old 05-24-2011, 05:19 PM
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Re: Memory dump of ECU

Will this / or could you eliminate the speed Governor that restricts top end ?
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  #1080  
Old 05-24-2011, 05:36 PM
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Re: Memory dump of ECU

No SVXes have governors. There's nothing in the ECU or TCU that limits the top speed.
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Now a mod "over there" ............Photo album
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