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Thread: 8l90e tutd

  1. #1
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    Default 8l90e tutd

    I'm setting up an 8L90E behind a 2016 LT1 in an older car. I would like to get the TUTD function to work. I have read other post saying that the hard wire input goes to pin 39 on the T87 controller. I have the resistor values figured out. Is there something in the TCM that needs to be switched? I have looked and don't see anything in the cal that says something like "switch TUTD from serial to hard wire".

    Thanks in advance.
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  2. #2
    Joe (Moderator) joecar's Avatar
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    Default

    TUTD is a hardwired connection since CAN/serial might get busy and slow down.

  3. #3
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    There is no "switch" in the tune file to change from serial to hard wire. Is there anyway to get this added to the cal file?

  4. #4
    Lifetime Member GMPX's Avatar
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    Default

    Probably not sorry, too hard to locate with these TCM's.
    I no longer monitor the forum, please either post your question or create a support ticket.

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