1995 E36 328i DME issues

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  1. 1995 E36 328i DME issues 
    #1
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    JoeCollins's Car Details
    Model of Car:
    328I
    Year of Manufacture:
    1995
    Transmission Type:
    Manual
    Car Body Type:
    Coupe

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    hi all,
    after fixing a no start immobilised issue with a replacement DME, EWS module and chip for the key (the bypasses using the EWS/DME wiring didn't work ) i have noticed that inside my old DME there is what seems to be an add-on chip. i know nothing about the circuits and wondered if anyone could tell me what this bit is? (see picture) or point me in the direction of a "stock" schematic?

    thank you in advance,

    Joe

    20130813_192957.jpg20130813_192849.jpg20130813_193012.jpg20130813_192918.jpg20130813_193016.jpg20130813_192934.jpg
    Last edited by JoeCollins; 13-08-2013 at 20:28.
     
     

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    #2
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    TheEnd's Car Details
    Model of Car:
    540
    Year of Manufacture:
    1998
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    It's possibly an EWS emulator.
    I've seen a few that haven't been fitted properly before that never worked.
     
     

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    JoeCollins (13-08-2013)

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    #3
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    JoeCollins's Car Details
    Model of Car:
    328I
    Year of Manufacture:
    1995
    Transmission Type:
    Manual
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    Brilliant - thank you. It didn't look like any kind of performance upgrade, but like i said, i have no idea. Just attached pictures - hopefully you can see what i mean. Thanks again.
     
     

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    #4
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    TheEnd's Car Details
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    1998
    Transmission Type:
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    Saloon
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    OK, it's not an emulator, but something a bit more historic.

    The earlier MS41 ecus (323/328 etc) had a non reprogramable memory chip fitted, called a TMS87PC110
    Once the memory was written, there is no way to erase or re-use it, and the chips are pretty rare and expensive.

    BMW dropped the use of them in late 1995 and replaced them with a reuseable chip and these ECUs can be reprogrammed as much as you like.

    Years ago though, when these cars were still new, these boards were added which take the place of the original 87pc110 and use the far more common 27c1024 memory chip you see on the other side.

    The boards probably cost £40-50, plus the removal of the old chip and the fitting of a socket, and a new memory chip so there were expensive but they had some value as remapping could have been £400-500 back then.

    Currently, you can pick up a second hand ECU for about £20 so it's no longer worthwhile to use them, but that's how people got around non-reprogramable ECUs when a replacement ECU would have cost £200-300.
     
     

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