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Thread: Serial Port Pins on EBL Flash II

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    Carb and Points! C3Ferrari's Avatar
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    Serial Port Pins on EBL Flash II

    Does anyone know what pins are used for the Serial Port interface on the Flash II ECM are (Data+, Data-, Return). I know they are D10, D11, and D12, but which one is which? I have a new unit I just installed into an '89 Corvette (it's TPI, so I have the Port Mod, if that matters), and it won't communicate with my laptop. Any help or ideas would be greatly appreciated.

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    Super Moderator dave w's Avatar
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    Carb and Points! C3Ferrari's Avatar
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    Been all through everything on the site, but none of his wiring diagrams have the serial port pins on them!

  4. #4
    GearHead-EFI Vendor!
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    Recall that the serial data at the ECM is 5V (TTL), don't go anywhere near 12V or it will pop the port on the micro-controllers.

    D10 is RX to the EBL ECM
    D11 is TX from the EBL ECM
    D12 is ground

    For the most part TX is always active (ECM powered up). RX is active when flashing and when a bank selection is made.

    RBob.

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    Carb and Points! C3Ferrari's Avatar
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    Thanks!

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    Carb and Points! Robertcladner's Avatar
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    thanks for this post, my problem has been fixed too.

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