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Thread: OBD-II port wiring

  1. #1
    Potential Tuner
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    Dec 2008
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    Question OBD-II port wiring

    I am doing an engine swap, 98 Buick Regal GS 3800SC into a fiero. I need to know the pinouts for the HPTuners module so that I can run the wires to make it work.
    I can't seem to find the Serial Data UART wire. I have the Serial data Class II. Is the class II the only one need to scan and write to the PCM?

  2. #2
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    Bump

  3. #3
    Advanced Tuner Programmer's Avatar
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    Jul 2007
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    DLC should be...


    Pin 2 - Serial**
    Pin 4 - GND
    Pin 5 - GND
    Pin 16 - 12V
    2009 Cadillac CTS-V 196.7 MPH on the Salt
    Superflow SF600 FlowBench -- Superflow Autodyn 30 Chassis Dyno -- Superflow SF901 Engine Dyno--RaceLogic Emulator -- MikiPro Logic Emulator -- ASNU Injector Flow Bench --

  4. #4
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    Correct me if I am wrong put your PCM has two inputs for the serial data.
    #14 and #11. #11 is the one you need. #14 is for the body control module.

  5. #5
    Potential Tuner
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    Nov 2009
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    The UDART Serial Data does not need connected to HPT, or your OBDII port.

    I was in a similar situation only a week ago, and found that only the purple serial wire needs connected (along with the 12v and ground wires).