Understanding ETC (electronic throttle control) map

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Understanding ETC (electronic throttle control) map

Postby ETC » Tue Apr 08, 2008 1:43 pm

Hello,

I hope I can find some help with my problem here. I am looking on the ETC map of a Nissan VQ35 engine but can not make sense of it.

The cell values raise and the only thing I know for sure is that the vertical axis is rpm. I do not know what the horizontal axis is and what the cell values represent.

Does anyone have any info on Denso ETC mapping?

Thank you.
ETC
 
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Postby Freon » Wed Apr 09, 2008 6:09 pm

Do you have a map we can look at?
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Postby ETC » Thu Apr 10, 2008 2:19 am

Oh, of course... here you go! As you can see there is a primary and a secondary ETC map.
Attachments
350Z_ETC.gif
350Z_ETC.gif (63.62 KiB) Viewed 3810 times
ETC
 
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Postby Freon » Thu Apr 10, 2008 1:05 pm

Can you not post the ROM file? I'd like to load it in Ecuedit and try to design an XML spec for it. I could also try to disassemble it to get a hint on the conversion factors.
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Postby ETC » Thu Apr 10, 2008 1:18 pm

I have no BIN file I can post, I am using OSIRIS Tuning Suite from a company called UpRev. All files are patched and only readable with their software.
ETC
 
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Hi

Postby christian_piasini » Sat Apr 12, 2008 6:16 am

Here the stock dump of the 350 Z


Can easy find this maps too inside.


Regards


Christian Piasini
R&D Piasiniengineering
Attachments
350Z.zip
(269.11 KiB) Downloaded 194 times
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Postby radsdau » Sun Apr 13, 2008 2:58 pm

Cool!!! Which processor is that? Is that SH7055?
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Postby Freon » Sun Apr 13, 2008 4:45 pm

Thanks. It appears this is a 7055 processor like the 2004 US STI and many 2004-2006 2.5L Turbo AVCS DBW models.

Is there a free flash program and some sort of affordable cable available for the 350Z available? If so I may be willing to spend some time writing basic definitions for it to help get a tuning platform started. I've started to disassemble it.
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Postby ETC » Sun Apr 13, 2008 11:32 pm

Maybe we could come back to the original question? :wink: I am looking for help understanding the ETC table as from my testing it's not likely the cell values are directly related to throttle positions, however what they represent I do not know and I do not know what the horizontal axis represents.
ETC
 
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Postby Freon » Mon Apr 14, 2008 12:59 pm

That's why I asked the above questions. You're asking for definition work to be done. I can't just open it and zero right in on the ETC stuff in 10-15 minutes. It's very complex on the Subaru Denso 7055/7058 ECUs. I'm not too interested in helping if this is just to help support a commercial reflash program.

So, how is this flashed? Is there a free reflash program available? I am willing to help if whomever is providing this capability is willing to take a similar approach as Colby has with free software and very affordable interface cables.
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Postby ETC » Mon Apr 14, 2008 11:42 pm

Oh, OK.... well I don't know of any free flash programms for the VQ35 engines. You can buy the user tunable version of the aforementioned software though.

I thought that maybe someone would know more about the "logic" of the Denso ETC map, I wasn't asking for definition or reprogramming work.
ETC
 
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Postby Jon [in CT] » Tue Apr 15, 2008 7:12 am

ETC wrote:I wasn't asking for definition or reprogramming work.
You asked for someone to define what the axis and cell values represent. That's called "definition."
ETC wrote:I do not know what the horizontal axis is and what the cell values represent.

Does anyone have any info on Denso ETC mapping?
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Postby ETC » Tue Apr 15, 2008 7:41 am

Then I apologize, I figured this would be an "universal" information if someone has a clue on how Denso ETC maps work as they are surely not used exclusively on these engines. I am not a programmer, I am just using this tool to tune cars.
ETC
 
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Postby Jon [in CT] » Tue Apr 15, 2008 7:54 am

ETC wrote:Then I apologize, I figured this would be an "universal" information if someone has a clue on how Denso ETC maps work as they are surely not used exclusively on these engines. I am not a programmer, I am just using this tool to tune cars.
They sure are exclusive to Nissan engines. Just because a manufacturer uses Denso software/compiler to create a ROM image doesn't mean that its tables have the same meanings as those created by other manufacturers using the same Denso software/compiler.
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Postby ETC » Tue Apr 15, 2008 8:07 am

Okay, thanks for pointing this out.
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