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Thread: Cadilac ECM Identification Help Please

  1. #1
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    Default Cadilac ECM Identification Help Please

    I am going to be working on 1999 Cadilac Deville. Does anyone know what model computer is in that vehicle? Does EFI work on it also?

  2. #2
    Lifetime Member GMPX's Avatar
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    It's a Siemens PCM, we don't support them.
    Check out this thread -
    http://forum.efilive.com/showthread....ight=Northstar

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
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    The 99 PCM is a Delco. It looks like an old 97 LS1 PCM. It uses 2 Mot CPU's and 4 small memory chips and a knock module.

    I can write this, but I can't read it yet.



    Cal Editor aka A.J.
    Lead Calibrator at PCM Calibrators
    ASE Master Certified since 1988 -- ASE L1, F1 & A9
    GM Technician since 1999 -- GM World Class Technician since 2009
    CNG Installer -- CSA Inspector
    A handful of people out there who do have an intimate knowledge of GM Calibrations

  4. #4
    Lifetime Member GMPX's Avatar
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    Wow, is that thing still HC11 based or is the main CPU on the other PCB? This is old 16bit stuff in there.
    I no longer monitor the forum, please either post your question or create a support ticket.

  5. #5
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    Hey I am in Rock Hill SC now and I have my other camera now and I can take pictures now. My old camera got broke by a valet attendant in Chicago.

    I will go pop some clean pictures like the one above.
    Cal Editor aka A.J.
    Lead Calibrator at PCM Calibrators
    ASE Master Certified since 1988 -- ASE L1, F1 & A9
    GM Technician since 1999 -- GM World Class Technician since 2009
    CNG Installer -- CSA Inspector
    A handful of people out there who do have an intimate knowledge of GM Calibrations

  6. #6
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    the old Delco Chip isn't always a Delco Chip. I think on different year PCM's it's a Mot





    BTW it is nice to have a camera without a broken screen
    Cal Editor aka A.J.
    Lead Calibrator at PCM Calibrators
    ASE Master Certified since 1988 -- ASE L1, F1 & A9
    GM Technician since 1999 -- GM World Class Technician since 2009
    CNG Installer -- CSA Inspector
    A handful of people out there who do have an intimate knowledge of GM Calibrations

  7. #7
    Lifetime Member GMPX's Avatar
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    Quote Originally Posted by CalEditor View Post
    the old Delco Chip isn't always a Delco Chip. I think on different year PCM's it's a Mot
    Correct, any chip that has the number '185' on it is a Motorola sourced part, anything with '466' is Delco.
    Looks like that PCM is all HC11 (16bit) based. Any this is 99? very odd.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

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