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c101 and x20 wire function questions....90% finished cant find rest in the ETM

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    c101 and x20 wire function questions....90% finished cant find rest in the ETM



    any help where you see ones that arent labeled would be most helpful or if some are labeled wrong. I have some concerns about the x20 becasue it seemedeverythin lead to "DataLink" but i know that it doesnt necesarrily mean ir didnt serve another function as well. Any input here would be great. These are both Body side plugs. c101 from a 1991 318is 5spd, and x20 from a 1992 325i coupe 5spd.

    Thanks.
    faint in, throttle out.

    #2
    This is what I have on my wiring chart,

    E30 Side
    6- O2 Heater
    7- DME
    8- Fuel Econ. signal
    9- Engine Speed signal (tach)
    11- Service Reset
    12- CEL
    14- Speedo Signal

    E36
    10- not needed
    11- not needed
    12- Water Temp
    23- oil pressure
    -Justin

    sigpic

    Current: BMWless for now... '15 Grand Cherokee & '03 Mach 1

    Comment


      #3
      thanks dude I'll give it a try.
      faint in, throttle out.

      Comment


        #4
        question though if 23 is oil pressure. what is the "pressure switch" @ pin 5 on the e36 side
        faint in, throttle out.

        Comment


          #5
          318is is the same as a '90 325i, without an oil level sensor.
          Build thread

          Bimmerlabs

          Comment


            #6
            so i have used the information above in conjunction with the image below to create my entire harness and have every wire from the c101 connected to something (hopefully all correct) except for the Gr/Yl pin 6 connection that is apparently O2 Heater or Power and the ABS red yellow wire? What wire should this connect too on the x20. I'm assuming pin22 or pin 10 as they are the only remaining wires of that gauge. Please help me out, and lastly where is the common spot to steal +12V for the red yellow ABS wire.

            Thanks

            faint in, throttle out.

            Comment


              #7
              for pin 20 (ABS power) just run a wire from pin 6. No need to splice into anything.
              Build thread

              Bimmerlabs

              Comment


                #8
                awesome pin 6 pin 20 c101 to pin 22 of x20 . dual purpose.
                faint in, throttle out.

                Comment


                  #9
                  yep!
                  Build thread

                  Bimmerlabs

                  Comment


                    #10
                    some pics for fun of the progress. Special thanks to my friend for soldering. I hate that shit.

                    still slightly incomplete. Will take a pic of the complete diagram tonight.





                    faint in, throttle out.

                    Comment


                      #11
                      finished wiring diagram... Will be test running it tommorow and let everyone know if it works.

                      faint in, throttle out.

                      Comment


                        #12
                        I live in Bayonne...if you want me to stop by I can and I'll get your car running easily. Done too many of these swaps.....
                        Originally posted by TSI
                        ♫ Rust flecks are falling on my head...♫
                        OEM+

                        Comment


                          #13
                          If it doesn't go for me tomorrow I may do that, but at first glance how do my charts look?

                          Do i have the right functions at the right pins?
                          faint in, throttle out.

                          Comment


                            #14
                            CEL isnt on and the m*%^$# f(*&%% just cranks and cranks away.

                            It will not start and I'm fed up.
                            faint in, throttle out.

                            Comment


                              #15
                              maybe I'm having a brain fart but why are you cutting the wires going into the C101 from the right hand side in this picture???
                              are you splicing the X20 in here rather than modify the engine harness??

                              try this link, scroll down to the bottom of the page. Hope this helps...

                              Last edited by e30rapidic; 02-13-2012, 09:14 PM.
                              '87 325ic, powered by S50.

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