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MSS54HP Boot Mode (Grounding pins 32 on the EEPROM)

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    MSS54HP Boot Mode (Grounding pins 32 on the EEPROM)

    Hello guys! I recently had a thread started of trying to troubleshoot the current state of my DME which was confirmed to be bricked from a mishap with MSSFLASHER.

    In the course of this thread, Terra mentioned that I can my particular error by grounding pin 37 on the master and slave of the EEPROM. I was also in contact with Paul @msstuning and he recommended the solution to ground pin 32 of master and slave to force boot mode.

    "short pins 32 of both eeproms to GND, then power up the ecu. removenshprts
    after 5 seconds. that should get you into bootmode. you can tehn identify
    the ecu to confirm and flash whatever is necessary."

    These were the only instructions I was given, that and conflicting pin number between the two I am unsure of what the process is.

    Would anyone be able to help clarify what needs to be done to force the boot mode? Or just the process of being able to short these to the ground. Any information helps and is greatly appreciated. I am well outside of my wheelhouse of knowledge but I am very willing to learn to get my car back and on the road.

    Thank you!

    #2
    I would start with making a bench flash harness. I don't think it would be wise (or even doable) to attempt this with the DME in the car.

    https://github.com/saildot4k/MSS54-X...sh-Harness-DIY

    You'll need some electronics and fittings to do it but it's much safer than tinkering with a live DME in the engine bay.

    Comment


      #3
      Originally posted by skristedja View Post
      I would start with making a bench flash harness. I don't think it would be wise (or even doable) to attempt this with the DME in the car.

      https://github.com/saildot4k/MSS54-X...sh-Harness-DIY

      You'll need some electronics and fittings to do it but it's much safer than tinkering with a live DME in the engine bay.
      Thank you for your reply. My only hesitation with this is that if I can’t get a clear answer on grounding pin 32 then I am just going to move forward to using the galetto kit to serve the purpose for me.

      I saw this as a possibly easier solution than waiting for the shipping on the galetto and it would be a little cheaper if I don’t necessarily need to bdm my ecu


      Sent from my iPhone using Tapatalk

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        #4
        I don’t think grounding pin 32 will do anything (it is already grounded). Grounding pin 37 should do the trick.

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          #5
          I still recommend use a geletto or bdm, it's easier to recover but for reference this is how I did mine, i just solder a couple of wires on the legs and left it on my DME, in case I want to put into bootmode.

          Click image for larger version

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            #6
            On MS43 DME, one can ground the boot pin to enter ECU and use tool like JMGarage to virginize or clone/backup the full EEPROM, including the boot sector. Hence making a boot mode backup as a 1:1 backup of the ECU that can be used to create clone of that ECU.

            On MSS54HP, the pin 32 is ground. Pin 37 says it's address A13.

            Once these pins on master/slave EEPROMs are grounded then can you create a 1:1 backup of the ECU that can be used to create a clone of that ECU?

            Or, only way to make a 1:1 backup of MSS54HP is through use of BDM?

            Thanks.


            Click image for larger version

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