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reprogramming Regina ECUs 700

posted by  The Plastic Lizard on  Tue Sep 14 10:49 CST 2004
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last visit: Tue Nov 8 09:34 CST 2011
[RELATED]

If anybody out there has the tool to reprogram and update the Regina ECU please let me know.

There was a TSB about it sometime in 94 I think. It was an update to the programming of the Bendix/Regina ECU.

I'd like to update my 91 but I'm a bit far from any dealer and none of the local guys has the tool. Contact me here or at my privite email : plasticlizard@adelphia.net and we can work something out.

It's good for your Karma.

TPL



--
1991 740 B230F 135K miles








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    reprogramming Regina ECUs 700

    posted by  Jim Holst on  Tue Sep 14 12:17 CST 2004
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    last visit: Tue Jan 4 11:05 CST 2011
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    I have a little information on this. My Mitchell repair CD shows that there was a modification to the Rex-Regina control modules for the '89 - 92 model 740/940. The purpose was to improve cold starts when low-volatility fuels were sold in the summer and to correct for idle dip when the AC came on. The mods brought the systems up to late '92 specs.

    However, the change involved replacing the entire MFI (Regina) control module and sometimes the Rex ignition module. These two modules had to be compatable and there were several possible combinations which would work. The change also involved some re-wiring in the MFI connector.

    Reference TP 31903/1

    I could not find any reference to re-programming the PROM. In fact it would have to be an EPROM and most references I've seen on those involve sending the EPROM somewhere to have it re-programmed or replacing the EPROM with a new one. In the '95 Volvo data there was reference to replacing the EPROM in the LH 2.4 system to correct for poor cold starting. The tools referenced were the standard anti-static tools used in working with sensitive electronic components. These basically serve to bleed off static charges though conductive work surface pads and the handles of hand tools. There is also a tool used to extract the EPROM from its socket. None of these tools is a re-programming tool. Sorry I couldn't find any more on this.








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      reprogramming Regina ECUs 700

      uid 27's pic
      posted by  Art Benstein on  Tue Sep 14 14:13 CST 2004
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      last visit: Fri Oct 17 20:10 CST 2014
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      Early this spring I got a chance to borrow a green manual on the "Regina Programmer" ordered by a fellow list member. Turns out it was very thin and only depicted what appeared to be a (proprietary) special tool for distributing code to the Regina ECU in the field. It looked like no EPROM burner I've ever used, but I believe it connected directly to the ECU's external plug, from which I infer serial download to non-volatile ram. But flash and nvram in the early 90's was a lot slower and smaller and expensiver, so it seems hard to swallow that I was looking at something capable of changing fuel maps and operating instructions.

      The manual was of no value to me-- just had instructions specific to the tool and its connection. The tool looked like the kind of thing that would bring several thousand bucks to its vendor. Just my recollection of inexpert observations. It was six months ago. Jim, you know my crs is getting worse.
      --
      Art Benstein near Baltimore








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        reprogramming Regina ECUs 700

        posted by  Jim Holst on  Wed Sep 15 06:15 CST 2004
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        last visit: Tue Jan 4 11:05 CST 2011
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        Art,

        My Rex-Regina Volvo green manual is sort of like that. There is some very helpful information on the system but much of the time it involves proprietary test readout boxes which I've never seen for sale.

        P.S. I've been looking for a fuel pressure tester which will connect to that Schrader valve on the 940 fuel rail. Those idiot designers have the test valve pointed downward and there isn't room to connect the testers that I've found so far. The Volvo manual shows their tester with a right angle connector. Have you found something which will work on this engine? It would be nice if it would also adapt to the 240 fuel rail as well.

        I just thought of those tire valve extensions which truckers use on the dual wheels. I wonder if those would work. What think you?








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          reprogramming Regina ECUs 700

          uid 27's pic
          posted by  Art Benstein on  Wed Sep 15 07:45 CST 2004
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          last visit: Fri Oct 17 20:10 CST 2014
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          Pointing down? Sounds like a safety reason perhaps? The one 940 in our fleet lives over the hills and through the woods, so I only have pictures to go by; unfortunately the photo of the rail I have must be hiding the shraeder valve.

          I can't think of any reason not to fit anything meant for tires to the fuel pressure tap, and I think my generic shraeder-tipped gauge also has a rather inflexible straight-on connection at the end. I did adapt it to the LH M14 fittings, though I like Randy Starkie's adapter (using compression fittings) better.





          --
          Art Benstein near Baltimore








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    reprogramming Regina ECUs 700

    posted by  Steve on  Tue Sep 14 12:01 CST 2004
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    last visit: Fri Oct 24 07:16 CST 2014
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    The Bosch ECUs are reprogrammed by replacing the chip. Not sure about Bendix REgina: they could be flash reprogrammable, but only using a special tool.








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      reprogramming Regina ECUs 700

      posted by  skipskip on  Tue Sep 14 14:13 CST 2004
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      last visit: Sun Jan 30 18:04 CST 2011
      [RELATED]

      OP is correct. there IS a tool to reprogram the Regina system. I have the manual. It's a fairly elaborate black box. the manual is prolly 20 pages. and NO i dont have a programmer.
      Skip







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