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Thread: How to flash MS41.1 to MS41.2 with WinKFP

  1. #1
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    How to flash MS41.1 to MS41.2 with WinKFP

    Prerequisites: working INPA installation with winkfp, interface cable, 12v to DME pin 60/diagnostic connector pin 18.

    MS41.1 and MS41.2 are the same hardware (all are labeled MS41.1 on the outside), but winkfp won't let you flash MS41.1 to MS41.2 because it looks at the file DATA\MDS412\MDS412.HWH to make sure the hardware number currently reported by the DME is listed there:

    1405491A F , 1405854B F , 1406464C F ;

    You can change the first number to whatever is on your current MS41.1 DME and it will let you flash:

    1437806A F , 1405854B F , 1406464C F ;

    I've done this *many* times and it works great. A similar process should work to flash MS41.2 to MS41.1, but I've never had the need to try.
    S54 swap DME flashing - $100
    S54 swap CAN interface board (for proper A/C & check engine light) - $275
    e36 SAP sim/secondary air pump simulator:
    $75 - standard or $170 - plug & play
    e36 post-cat O2 sims: $115 shipped, plug & play

  2. #2
    busterhax's Avatar
    busterhax is offline Y̝͎̘̍́ͣ̉͑̿̆Ō͎̼̺̬̒ͯ̃̇͗̂ U͈̖
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    Genius. This should help out the m3 guys with finding replacement DMEs as ms41.1s are more abundant for reasonable prices.

  3. #3
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    I'm having trouble getting the 20 pin connector to work on my m3. I bet I could install one of my spare 328 dme's in my 328 vert and use this procedure to flash it to ms41.2

  4. #4
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    Mr. Peterson you continue to be the Man!!
    97 BMW M3 (s52b32) - VF-Supercharger kit ( Vortech V2-SQ supercharger, 32 pound injectors, VF tuning ), VDO/LeatherZ Gauge Kit (Oil Temp, Oil Pressure, and Boost), UUC Motorwerks RSC36 Exhaust, Stainless Steel 6-2 Exhaust Headers, Bilstein Sports, Rear Adjustable Camber bushings, Wheel Spacers 10mm in front 25mm in back, Uprated Clutch, UUC Shift Knob, Short Shifter and Clutch Stop, Cross Brace, Mason Engineering front strut bar, Contour Wheels, Euro Ellipsoid (Angel Eyes) HID Headlights, braided steel brake lines, aluminum thermostat housing, mishimoto aluminum radiator and silicone hoses and a partridge in a pear tree

  5. #5
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    Quote Originally Posted by flyfishvt View Post
    I'm having trouble getting the 20 pin connector to work on my m3. I bet I could install one of my spare 328 dme's in my 328 vert and use this procedure to flash it to ms41.2
    Should work for flashing, probably better to build a bench flasher, or better yet - find out what is going on with the 20-pin.

    The cheap salvage yard near me (Pick N Pull) only has OBD1 cars, but the connector is the same - just had to hacksaw/file the housing a bit where it slides into the DME sort of like a hinge. I pulled all of the pins I didn't need and installed a SPDT switch that lets me turn the DME off, on, or on with programming voltage to pin 60.

    S54 swap DME flashing - $100
    S54 swap CAN interface board (for proper A/C & check engine light) - $275
    e36 SAP sim/secondary air pump simulator:
    $75 - standard or $170 - plug & play
    e36 post-cat O2 sims: $115 shipped, plug & play

  6. #6
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    I have a connector sitting on top of my Bentley manual just waiting for me to do the same thing. I need to find a inexpensive power source. I'm thinking maybe an old desktop computer.

  7. #7
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    Quote Originally Posted by flyfishvt View Post
    I have a connector sitting on top of my Bentley manual just waiting for me to do the same thing. I need to find a inexpensive power source. I'm thinking maybe an old desktop computer.
    I've been happy with this - http://www.amazon.com/Tekpower-HY180.../dp/B000CSQK5E
    S54 swap DME flashing - $100
    S54 swap CAN interface board (for proper A/C & check engine light) - $275
    e36 SAP sim/secondary air pump simulator:
    $75 - standard or $170 - plug & play
    e36 post-cat O2 sims: $115 shipped, plug & play

  8. #8
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    Quote Originally Posted by gpeterson View Post
    I bet you have. Overkill for the job though. Do you have the volts/amps requirement for the Siemens 41 jotted down somewhere. For those of us not offering a service wall warts are a little more appealing. I think it's posted on the other forum but I'm on my phone.
    97 BMW M3 (s52b32) - VF-Supercharger kit ( Vortech V2-SQ supercharger, 32 pound injectors, VF tuning ), VDO/LeatherZ Gauge Kit (Oil Temp, Oil Pressure, and Boost), UUC Motorwerks RSC36 Exhaust, Stainless Steel 6-2 Exhaust Headers, Bilstein Sports, Rear Adjustable Camber bushings, Wheel Spacers 10mm in front 25mm in back, Uprated Clutch, UUC Shift Knob, Short Shifter and Clutch Stop, Cross Brace, Mason Engineering front strut bar, Contour Wheels, Euro Ellipsoid (Angel Eyes) HID Headlights, braided steel brake lines, aluminum thermostat housing, mishimoto aluminum radiator and silicone hoses and a partridge in a pear tree

  9. #9
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    Quote Originally Posted by RobertFontaine View Post
    I bet you have. Overkill for the job though. Do you have the volts/amps requirement for the Siemens 41 jotted down somewhere. For those of us not offering a service wall warts are a little more appealing. I think it's posted on the other forum but I'm on my phone.
    Overkill for this, but already on my desk and used for many other things. Current-limiting function is nice to have when you mess something up.

    Power supply currently reads .29A with MS41 idle. May consume more during reading/writing, haven't ever watched it.
    S54 swap DME flashing - $100
    S54 swap CAN interface board (for proper A/C & check engine light) - $275
    e36 SAP sim/secondary air pump simulator:
    $75 - standard or $170 - plug & play
    e36 post-cat O2 sims: $115 shipped, plug & play

  10. #10
    busterhax's Avatar
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    My bench hookup draws about 500-550 mA when ignition is on

  11. #11
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    Quote Originally Posted by gpeterson View Post
    Should work for flashing, probably better to build a bench flasher, or better yet - find out what is going on with the 20-pin.

    The cheap salvage yard near me (Pick N Pull) only has OBD1 cars, but the connector is the same - just had to hacksaw/file the housing a bit where it slides into the DME sort of like a hinge. I pulled all of the pins I didn't need and installed a SPDT switch that lets me turn the DME off, on, or on with programming voltage to pin 60.


    How did you wire it up

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