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-   -   Gearshift Maps (https://www.subaru-svx.net/forum/showthread.php?t=46581)

longassname 12-23-2008 07:45 AM
Re: Gearshift Maps
 
ut oh, when you are done with that you are sure to get a request for the 2.0 turbo; they have the hitachi too.



Quote:
Originally Posted by b3lha (Post 577904)
I really want to get back to playing with the TCU. But I've been distracted by another project. I'm busy helping a guy to find the parameter addresses for his Impreza EJ15 ECU. It's a Hitachi unit and the code is quite nasty.

b3lha 12-24-2008 04:02 AM
Re: Gearshift Maps
 
Quote:
Originally Posted by longassname (Post 578468)
ut oh, when you are done with that you are sure to get a request for the 2.0 turbo; they have the hitachi too.
Yeah, Probably. Although I'm surprised the 2.0 turbo parameters aren't already posted on the net somewhere.

longassname 12-24-2008 06:43 AM
Re: Gearshift Maps
 
i didn't mean 2.0 i meant 2.2

b3lha 12-30-2008 05:21 PM
Re: Gearshift Maps
 
Hey Michael,

I wonder if we're missing a trick with the TCU mods.

Ryan's post on the USMB seems to suggest that on his TCU, the stock rom can be disabled by a resistor cut rather than removing it completely - like on our ECU.

Quote:
Originally Posted by presslab
The TCU was modified by soldering a socket onto the circuit board. I was going to use a different Legacy TCU but it had no holes to solder the socket! I'm not sure what year that TCU was. After the socket is in place, there is a 0-ohm resistor on the bottom of the board that needs to be moved to enable the new socket. The ROM chip I am using is a SST27SF512; this EEPROM is easily reprogrammed without a UV eraser.
http://www.ultimatesubaru.org/forum/...ad.php?t=93670

Any ideas?

longassname 12-30-2008 09:30 PM
Re: Gearshift Maps
 
r432 connects the oe of the surface mount to the same driver pin that goes to the dip socket
r431 if used connects the oe of the surface mount to high

r430 connects the ce of the surface mount to ground (the ce of the dip socket is straight to ground)
r428 connects the ce of the surface mount to high

r429 pulls a14 of both pad sets high

moving the resistor from r432 to r431 will put the surface mount in output dissable mode


Quote:
Originally Posted by b3lha (Post 579865)
Hey Michael,

I wonder if we're missing a trick with the TCU mods.

Ryan's post on the USMB seems to suggest that on his TCU, the stock rom can be disabled by a resistor cut rather than removing it completely - like on our ECU.


http://www.ultimatesubaru.org/forum/...ad.php?t=93670

Any ideas?

b3lha 12-31-2008 05:15 PM
Re: Gearshift Maps
 
Quote:
Originally Posted by longassname (Post 579908)
r432 connects the oe of the surface mount to the same driver pin that goes to the dip socket
r431 if used connects the oe of the surface mount to high
moving the resistor from r432 to r431 will put the surface mount in output dissable mode
Nice work.:)

I see it, the little green surface mount one in the corner with 000 stamped on it.

However, it's a very small part for an amateur like me to solder. It might actually be easier to remove the rom from the board than to disable it by moving the resistor.:rolleyes:

b3lha 01-08-2009 08:32 AM
Re: Gearshift Maps
 
Quote:
Originally Posted by longassname (Post 579908)
r432 connects the oe of the surface mount to the same driver pin that goes to the dip socket
r431 if used connects the oe of the surface mount to high

r430 connects the ce of the surface mount to ground (the ce of the dip socket is straight to ground)
r428 connects the ce of the surface mount to high

r429 pulls a14 of both pad sets high

moving the resistor from r432 to r431 will put the surface mount in output dissable mode
Michael, I've added the above information to my website, credited to you. Is that OK?

http://www.alcyone.org.uk/ssm/tcumod.html

longassname 01-08-2009 08:36 AM
Re: Gearshift Maps
 
sure,

I see you have a sst27sf256 in one of your pictures. Do you have a current source for them?

b3lha 01-08-2009 09:03 AM
Re: Gearshift Maps
 
Quote:
Originally Posted by longassname (Post 581175)
sure,

I see you have a sst27sf256 in one of your pictures. Do you have a current source for them?
No. It's a sst27sf512. I got it from Calum. I think he got it from Mouser.

longassname 01-08-2009 09:06 AM
Re: Gearshift Maps
 
ah, ya they still make those..the 256's are harder to find.

longassname 01-10-2009 07:55 AM
Re: Gearshift Maps
 
subernatural,

Did you ever get a tcu?

longassname 01-14-2009 08:25 AM
Re: Gearshift Maps
 
phil,

if you come up with a desire to switch between tcu software on the fly I'll be happy to give you a multi-tune adaptor.

b3lha 01-14-2009 06:13 PM
Re: Gearshift Maps
 
Quote:
Originally Posted by longassname (Post 582197)
phil,

if you come up with a desire to switch between tcu software on the fly I'll be happy to give you a multi-tune adaptor.
Thanks. I might take you up on that sometime.

longassname 02-23-2009 08:51 AM
Re: Gearshift Maps
 
bump for this being cool..come on peeps..trust me, you want to chip your tcu.

SuberNatural 02-23-2009 12:41 PM
Re: Gearshift Maps
 
Im waiting on some funding lol. Like I said though, after my TCU is chipped I'll be getting a ROM off you.


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