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MSS54 DS2 Tool: FREE TOOL for programming DME - Tune, full binary, flash counter, etc

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    V1.2.1 released. https://github.com/karter16/MSS54-DS...ses/tag/v1.2.1

    bugfix/minor enhancements
    • Fixed an issue with the CSL flap test which caused the test to abort prematurely. The test now sends the DS2 test command twice, as is required.
    • Changed TMOT prerequisite for VANOS test to 75 degrees from 80 degrees.
    • Added display of TDME (DME temperature) to the E-Box Fan test.
    • Added display of TMOT (motor temp) and TKA (radiator outlet temp) to the Electric Fan PWM Control test.
    Last edited by karter16; 05-31-2026, 12:52 PM.
    2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
    Build Thread | Community Patch | MSS54 DS2 Tool

    Comment


      Originally posted by karter16 View Post
      V1.2.1 released. https://github.com/karter16/MSS54-DS...ses/tag/v1.2.1

      bugfix/minor enhancements
      • Fixed an issue with the CSL flap test which caused the test to abort prematurely. The test now sends the DS2 test command twice, as is required.
      • Changed TMOT prerequisite for VANOS test to 75 degrees from 80 degrees.
      • Added display of TDME (DME temperature) to the E-Box Fan test.
      • Added display of TMOT (motor temp) and TKA (radiator outlet temp) to the Electric Fan PWM Control test.
      Thanks karter16. A silly question but does the "Idle Speed Control" test manipulate the Idle Control Valve?

      Comment


        Originally posted by ac427 View Post

        Thanks karter16. A silly question but does the "Idle Speed Control" test manipulate the Idle Control Valve?
        Yes it does. Not directly, in that the desired idle target is still measured against the assessed engine and accessory load as a whole, and the ICV then controlled as a result. e.g. it's not a direct "open ICV by this amount or to this position" more a "I want idle to be this speed", and the DME then works out how the ICV should be set accordingly (I only note this because this differs to how the throttle test works which is a "open the throttle bodies to this exact position/percentage").
        2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
        Build Thread | Community Patch | MSS54 DS2 Tool

        Comment


          Hmm, still having the same issue with the flap test. Not sure if it's my tune that is suppressing DTCs or what.
          2004 Silbergrau Metallic 6MT
          Karbonius/OEM Snorkel/Flap/HTE Tuned
          Ssv1/Catted Sec. 1/SS 2.5" Sec. 2/SCZA

          OE CSL Bootlid/AS SSK/TCK Vorshlag/4.10 Gears/ Sportline 8S Wheels/Cobra Nogaros
          RACP Plates/Vincebar/CMP/Turner RTAB/Beisan

          2006 M6 Black Saphire SMG
          Instagram

          Comment


            Originally posted by Cubieman View Post
            Hmm, still having the same issue with the flap test. Not sure if it's my tune that is suppressing DTCs or what.
            Nah if it's working for you with tool32 then it'll be the app. There must be something else that's affecting it as well. Just a bit hard to figure out without having one myself to test with


            Sent from my iPhone using Tapatalk
            2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
            Build Thread | Community Patch | MSS54 DS2 Tool

            Comment


              oh man, this is so good. Thank you!

              Comment


                Originally posted by karter16 View Post

                Nah if it's working for you with tool32 then it'll be the app. There must be something else that's affecting it as well. Just a bit hard to figure out without having one myself to test with


                Sent from my iPhone using Tapatalk
                Could the tool be trying to close it when it is already closed or vice versa?

                It sounds a lot like the throttle actuator at 100%

                Comment


                  Is there a guide to wiring in the CSL flap motor and sensor available?

                  Comment


                    Originally posted by ac427 View Post
                    Is there a guide to wiring in the CSL flap motor and sensor available?
                    Well here is my DIY attempt at converting my wiring to OEM CSL after replacing my MSS54 with a Terra Modified MSS54HP. I have an OEM CSL Airbox with Flap and all OEM ducting etc.. Starting to untangle the mess LOL..... http://i17.photobucket.com/albums/b96/ejazsharif/DARTH%20VADER/CSL%20MAP-IAT-FLAP%20wiring/IMG_0840.jpg

                    Comment


                      is it normal in 1.2.1 to show KL15 ignition on when i just have the application open but no USB cable connected?

                      i just downloaded and installed over previous version and launched 1.2.1 but saw the status shows KL15 ignition on

                      Click image for larger version

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                      Comment


                        Originally posted by nextelbuddy View Post
                        is it normal in 1.2.1 to show KL15 ignition on when i just have the application open but no USB cable connected?

                        i just downloaded and installed over previous version and launched 1.2.1 but saw the status shows KL15 ignition on

                        Click image for larger version  Name:	image.png Views:	5 Size:	84.0 KB ID:	357451
                        Weird. No it's not. Let me investigate. Are you running in a VM?

                        What happens if you close and reopen the app, it persists?


                        Edit: I don't seem to be able to reproduce this on my test machines. Is COM3 the COM port your cable is usually on? or a different / virtual COM port?
                        Last edited by karter16; 06-04-2026, 05:55 PM.
                        2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
                        Build Thread | Community Patch | MSS54 DS2 Tool

                        Comment


                          Originally posted by karter16 View Post

                          Weird. No it's not. Let me investigate. Are you running in a VM?

                          What happens if you close and reopen the app, it persists?


                          Edit: I don't seem to be able to reproduce this on my test machines. Is COM3 the COM port your cable is usually on? or a different / virtual COM port?
                          i just downloaded and installed 1.2.1 to my other laptop and i dont have anything installed driver wise or bmw tool wise other than this DS2 tool from today. when i run it, it shows nothing is connected as i would expect.

                          my bmw tool laptop which is a lenovo thinkpad, is not a VM and has many things installed along with previous FTDI drivers not the ones you provided but my D CAN USB is not plugged in when that issue happens. normally it show COM1 if it is plugged in.

                          not a huge deal for me but i will try different scenarios and see if i can nail that one down

                          for now seems to be an isolated environmental related issue specific to me

                          Comment


                            Originally posted by nextelbuddy View Post

                            i just downloaded and installed 1.2.1 to my other laptop and i dont have anything installed driver wise or bmw tool wise other than this DS2 tool from today. when i run it, it shows nothing is connected as i would expect.

                            my bmw tool laptop which is a lenovo thinkpad, is not a VM and has many things installed along with previous FTDI drivers not the ones you provided but my D CAN USB is not plugged in when that issue happens. normally it show COM1 if it is plugged in.

                            not a huge deal for me but i will try different scenarios and see if i can nail that one down

                            for now seems to be an isolated environmental related issue specific to me
                            I'm not sure if i am helping but with the latest version of the tool and nothing connected to my laptop but with FTDI drivers loaded, KL30 and KL15 are not illuminated.

                            However, as soon as i plugged the USB end of the cable in the COM port but without the OBDII connector plugged into the car both KL30 and KL15 illuminated.

                            Click image for larger version  Name:	image.png Views:	0 Size:	52.8 KB ID:	357532

                            Comment


                              Originally posted by 0-60motorsports View Post

                              Yeah that's what I thought mate. My cousin has a windows tablet, told him to bring it over and I'll download the tablet and give it a shot once the car is back.
                              you can buy windows license for about $10 License Tom


                              Sent from my iPhone using Tapatalk

                              Comment


                                Originally posted by fattycharged View Post

                                you can buy windows license for about $10 License Tom


                                Sent from my iPhone using Tapatalk
                                Yeah I'll do that and get a dedicated windows laptop too. Thank you.

                                Comment

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