Re: [opendiag] Nissan Interfacing Project

Sorry. www.telemaster.ru/orange/proshivki1.html
----- Original Message -----
From: Jai Dhar
To: opendiag@yahoogroups.com
Sent: Wednesday, September 10, 2003 6:56 PM
Subject: Re: [opendiag] Nissan Interfacing Project

So if I could just find out this web site, it might help things a bit :-)

Quoting highlander <gorgar@...>:

> I do not know for your Nissan but on one web site have instructions how to
> make so called chiptuning for better perfomance for other Nisaan,file is free
> for download,
> but is protected by password(rar) .In that case you must unsolder
> chip,reprograming with new
> dump or put new chip with appropriate data and that is all.If you are
> interest in chiptuning some
> firms offer tool for chiptuning even through the OBD2 connector.
> That is in the most case with firms in Germany.I am visit one website but i
> am forget whichone,they sale tool for
> chiptunnig over diagnose connector.I tell you this that you know that is
> possible.
> Regards from Serbia
>
> ----- Original Message -----
> From: turbans_turkey
> To: opendiag@yahoogroups.com
> Sent: Wednesday, September 10, 2003 2:55 PM
> Subject: [opendiag] Nissan Interfacing Project
>
>
> Hello everyone,
>
> I have recently taken a newfound interest in the challenge of ECU
> interfacing with my '96 Nissan Maxima (OBD-II compliant/VQ30DE
> engine). Anyway, my goal is this - to basically make a little
> monitoring station that can grab as much information as possible (no
> matter how useless) while driving, so that it's real time. I'm a
> Computer Engineer, so the hardware part isn't the big problem, but
> the communication protocol(s) on the other hand are what seems to be
> the problem. I have 3 proposed solutions to my project, and I was
> hoping if I could obtain some clarification as to the validity of
> them.
>
> All the various sensors tie directly into ECU, and one can
> communicate to the ECU through the OBD-II protocol, correct? But this
> will only provide limited information, and won't allow any
> modifications (if I wanted to tweak for power or whatever). So
> strictly using OBD-II, I could probably obtain most of the relevant
> information about performance, but I could not change anything,
> correct? So this is one option for monitoring, just talk through OBD-
> II.
>
> If I don't want to use OBD-II (or as an extra), I could tie directly
> into the sensors, correct? As in between where the sensors interface
> to the ECU. This way, I wouldn't have to use OBD-II, and I could get
> more 'raw' information. HOwever, each sensor is different, and they
> all have different characteristic curves I'm sure, which makes things
> a bit more difficult. But it's still an option, correct?
>
> These seem to be the two obvious solutions, right? Now, the
> limitation in both of these is that I cannot modify engine
> parameters. For that, I would need to go directly into the ECU,
> right? And modify it's EPROM. IF I wanted to do this, I would have to
> obtain a memory map of the EPROM (which, by far, seems the most
> challenging task) - but if I obtained this, or at least part of it,
> not only could I view all the parameters that I could in the previous
> solutions, but I could modify them as well, correct?
>
> The last option would be nice, if viable, but I'm hoping that maybe
> I could modify parameters through another mechanism (if I'm lucky).
> Either way, like I said, the goal is to monitor, not modify - it
> would be nice if I could do both though. Any comments are appreciated,
>
> Jai
>
>
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Received on Wed Sep 10 10:06:15 2003