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Thread: PLX SM-AFR Wideband to VCM Scanner

  1. #1
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    PLX SM-AFR Wideband to VCM Scanner

    Being fairly new to HPTuners, I'm looking for some input on how best to connect a PLX SM-AFR Wideband to the Prolink+ Cable on my MPVI3 and set it up properly in VCM Scanner.

    My understanding from researching is that the 0-5V wideband output from the PLX should be connected to the red wire on the Prolink+ cable.

    If that's correct, what is the best way to setup it up in VCM scanner for logging and make sure the math (AF Ratio = 2 * Voltage +10) is correct?


    PLX SM-AFR Info:
    https://www.plxdevices.com/Wideband-...7346002726.htm

    Bosch LSU 4.2 Sensor

    0-5V Wideband Output
    (AF Ratio = 2 * Voltage +10)

  2. #2
    Simply add channel and choose the external input MVPVI3 input 1 (red wire). then right click on the added channel and chose transform. select the PLX AFR defualt. save your channel list. re-syc the MVPI and it should start pulling the voltage and converting it to AFR.

  3. #3
    Blue highlite means you have it in the channel list already.

  4. #4
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    Quote Originally Posted by DaveNY View Post
    Blue highlite means you have it in the channel list already.
    I just figured that out , but I can't find a matching name, so I need to keep digging to see what it is mapped too.

    Thanks for pointing me in the right direction tho!

  5. #5
    it'll say right in the channel list what its mapped to. read my first reply again. you need to transform it to convert voltage to lambda or AFR (whichever you want)

  6. #6
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    I have a custom channel list from the tuner, so I am assuming that "MPVI2.1" is Input 1(red wire) and "MPVI2.2" is Input 2(blue wire) and I just need to adjust the transform to PLX for MPVI2.1 that is currently set for Ballenger - AFR500.

    mpvi_channels.png

  7. #7
    yes, if you only have one PLX wideband hooked up to the red wire, you can delete the other two channels. then transform the MVIP2.1 channel from a Ballenger format to PLX. chose Transform/oxygen sensors/air fuel ratio/PLX and click ok.

  8. #8
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    Quote Originally Posted by DaveNY View Post
    yes, if you only have one PLX wideband hooked up to the red wire, you can delete the other two channels. then transform the MVIP2.1 channel from a Ballenger format to PLX. chose Transform/oxygen sensors/air fuel ratio/PLX and click ok.
    Thank you Sir!