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Thread: VCM MPVI firmware 4.8.7 SCANNER NOT CONNECTING TO LM-2 WIDEBAND HELP PLEASE

  1. #1
    Potential Tuner
    Join Date
    May 2021
    Posts
    1

    VCM MPVI firmware 4.8.7 SCANNER NOT CONNECTING TO LM-2 WIDEBAND HELP PLEASE

    I have MPVI interface that was working with lm-2 wideband.
    I read a vehicle and it prompts me to update.
    after the update I can add the channel, I can see lm-2 options I have the calibrations of 1024-0.5 volts out.
    Once I start Record it disappears.

    firmaware 4.8.7 PMVI interface
    firmaware 1.8a lm-2 wideband
    2002 ecm/pcm/ecu gm truck

    please any help will greatly appreciated it .

  2. #2
    Advanced Tuner Pulse_GTO's Avatar
    Join Date
    Apr 2008
    Posts
    283
    Are you using the Serial or analog out from the LM-2? I had the same problem last year where the serial connection would cause the PID to disappear. There is also the problem of the analog out not being a true analog signal but a PWM signal that the MPVI reads and displays as a bunch of garbage data that we cannot use. I build a digital to analog converter and run that between the LM-2 and the MPVI. I then set up the LM-2 on one of the 0-5V analog inputs in the Scanner and is works great so far. I got the information on how to build the box from this thread.