Ever get tired of probing wires? Building E30 Diag Tools!

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  • James Crivellone
    Head Janitor
    • Oct 2003
    • 6297
    #1

    Ever get tired of probing wires? Building E30 Diag Tools!

    I started phase 1 of my motronic diag box today, this is the first mockup of what it will be capable of.

    Once complete, the system will be able to read all engine sensors, and report them to a selectable meter/digital readout on a breakout box that will connect to this one. I will also have 2 adapters for connecting to ETA and M10 harnesses.

    Phase one features Main Relay Control, Fuel Pump Relay, O2 Heater, Check Engine Light Test, Ground Testing, Constant Power Indication, and Manual Injector Pulsing.

    Phase 2 will include the sensor metering, and Phase 3 should have the adapters that I need for testing all 3 configurations, so I should be fully compatible with M42, M10, M20, and perhaps some other engines assuming electrical similarities.

    I also plan on building a box that will allow me to connect it in the chain between motor and ECU, to monitor everything in realtime. That will be a complete bitch, however I can appreciate the value in having such a device.

    Here are shots of Phase 1, I have not installed the DB25 breakout connector yet as I am still drawing up schematics for that. The final version will include a much nicer label, not one printed on plain paper on my laser printer :)





    Anyway, thats it!
    Tags: None
    • parkerbink
      R3V OG
      • Jun 2004
      • 10134
      #2
      That looks great. I am very impressed especially seeing as you say it is just the first go at it!

      Thanks for sharing!

      [IMG]https://cimg4.ibsrv.net/gimg/my350z.com-vbulletin/550x225/80-parkerbsig_5096690e71d912ec1addc4a84e99c374685fc03 8.jpg[/IMG

        Comment

        • e30Matt
          R3V Elite
          • Dec 2003
          • 5077
          #3
          Haha, finally get some of that useless computer knowledge put to work. ;)

          Awesome work James, can't wait to see it in action. Are you planning a write-up on how to build it?

          "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

            Comment

            • James Crivellone
              Head Janitor
              • Oct 2003
              • 6297
              #4
              Originally posted by e30Matt
              Haha, finally get some of that useless computer knowledge put to work. ;)

              Awesome work James, can't wait to see it in action. Are you planning a write-up on how to build it?
              The current design is pretty simple, if I really get into this I will design a custom PCB to make everything easier, if so I can easily put up all the schematics for its design/build.

                Comment

                • BahnE30
                  E30 Enthusiast
                  • Oct 2003
                  • 1050
                  #5
                  a smarter person would either a) sell the schematics b) sell the unit itself

                  just food for thought....

                    Comment

                    • James Crivellone
                      Head Janitor
                      • Oct 2003
                      • 6297
                      #6
                      Originally posted by BahnE30
                      a smarter person would either a) sell the schematics b) sell the unit itself

                      just food for thought....
                      Everybody who has ever met me knows that its very difficult to give me money for things I do, especially help with cars.

                      While a smarter person could sell the schematics/the unit, a generous person would provide it to the community on which he based his knowledge on originally :)

                      just food for thought...

                        Comment

                        • Mot
                          45 toting redneck
                          • Jul 2004
                          • 4018
                          #7
                          Originally posted by James Crivellone
                          Everybody who has ever met me knows that its very difficult to give me money for things I do, especially help with cars.

                          While a smarter person could sell the schematics/the unit, a generous person would provide it to the community on which he based his knowledge on originally :)

                          just food for thought...
                          sums you up pretty well. I owe you like 30k in hours of labor.

                            Comment

                            • Beej '86 325es
                              R3VLimited
                              • Feb 2004
                              • 2639
                              #8
                              Wow, that's pretty impressive. Nice work man. :)
                              -Brandon
                              '86 325es S50
                              '12 VW GTI Autobahn DSG
                              '03 540i M-Sport (sold)
                              '08 Jeep SRT-8 (sold)

                              For sale:
                              S50 TMS chip for Schricks

                                Comment

                                • bmwm3n528
                                  No R3VLimiter
                                  • Dec 2003
                                  • 3654
                                  #9
                                  Originally posted by James Crivellone
                                  Everybody who has ever met me knows that its very difficult to give me money for things I do, especially help with cars.

                                  While a smarter person could sell the schematics/the unit, a generous person would provide it to the community on which he based his knowledge on originally :)

                                  just food for thought...

                                  Awwwww......
                                  Trevor Ely
                                  '95 M Sport 540i - '00 A4 1.8TQMS - '85 190E 2.3-16
                                  '88 535is - '87 325e - '89 325is - '91 318is - '90 325is - '96 328is

                                    Comment

                                    • Spaz
                                      Crazy Canuck
                                      • Oct 2003
                                      • 2276
                                      #10
                                      that is one of the coolest things i've ever seen made.
                                      Cam .W '91 325is

                                      Spaz's 1991 Alpine White???? S52 Build Thread...

                                        Comment

                                        • Justin B
                                          Sikky Nar Nar
                                          • Mar 2005
                                          • 4273
                                          #11
                                          Awesome work, James. I must say you certainly are very generous, even for the short while I was there during the PNW Picnic. Hopefully I can get back up there this year. If you do make a write up and/or improve what it 'sees' I guess, I'd like to hear about it it. Good luck with that.

                                            Comment

                                            • James Crivellone
                                              Head Janitor
                                              • Oct 2003
                                              • 6297
                                              #12
                                              Well I just took it from mockup to functional alpha.



                                              its working on the bench, I will test it on an actual car tommorrow, but there you have it.

                                              Thanks for the comments as well guys, its cool little tools like this that can make diagnosing wiring issues alot easier.

                                                Comment

                                                • h0lmes
                                                  #13
                                                  that is pretty neat

                                                    Comment

                                                    • BENdashdash
                                                      Tom is not my friend
                                                      • Aug 2004
                                                      • 2506
                                                      #14
                                                      You're a day late ;)

                                                      Nice work, thats pretty spiff. I'm anxious to see how it develops.

                                                        Comment

                                                        • DarkWing6
                                                          Moderator
                                                          • Apr 2004
                                                          • 7144
                                                          #15
                                                          James, you amaze me.
                                                          sigpic

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