FastECU

I managed to dump my ECU with your wonderful program (did have to select 2003 Legacy 2.0 sub_unisia_jecs_70).

I get slightly different results with ecuMem though perhaps I am not setting the correct start and end?

Is there anything out there that can edit these files? looking to disable some DTC in regards to secondary air.

Guessing flashing it back is not working and super risky anyway?

Ill keep tinkering around in the mean time see if I can figure it out

It looks like there is some data missing from start of file that is downloaded with FastECU. First 2688 bytes, after that it looks right. There is some bugs still with Hitachi ECUs and writing is not yet possible as I haven't yet able to use test ECUs for those. But those are under development so hope we have them added as soon as possible.

ah good to know, if there's anything I can do let me know... willing to learn/help out.


my post on romrader forum might be a little bit wrong then ... https://www.romraider.com/forum/viewtop ... =8&t=20689

Hi Miika,

Any news on Hitachi ECU writing? I have an ecu here on the bench for testing.
Rom dumps are the exact same between fast ecu and pcmflash.

Cheers

mrdohca wrote:Hi Miika,

Any news on Hitachi ECU writing? I have an ecu here on the bench for testing.
Rom dumps are the exact same between fast ecu and pcmflash.

Cheers

Hi,

I'm starting to work these out now.

Awesome! Let me know if you need a hand with testing

Better late than never

There was some things that made me stop working with these for a while, but now I have worked out unisia jecs reading/writing. These are tested only with uj20/30 but should work with all uj20/30/40/70. We are also figuring out unbricking uj70 in case of bricking it when flashing, uj20/30 is already done.

I'm also getting to create definitions at some point, as some I already have that I can use base for others. So at least basic tuning can be made.

Secondary air pump codes should get disabled by zeroing bit4 (0x10) in 0x8031, so if value is 0x12, after disabling it should be 0x02.

New version is not yet under master branch/precompiled but should get first release version soon.