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Thread: AEM Wideband 5v signal not working for data logging.

  1. #1
    Join Date
    May 2015
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    96 Hellrot 328is Turbo

    AEM Wideband 5v signal not working for data logging.

    I posted this in the engine tuning section as well, but I figured it would be good to ask you guys since there is a large knowledge pool in here and someone likely has some experience with this sensor.

    I need to do some data logs for TRM to revise my tune, and I need to tap into the analog 5v signal from my AEM UEGO wideband O2 sensor (white wire). The problem is, when I check the signal voltage with a DMM, it gives me about 0.8v. It jumps around a little, but regardless of if I am max rich or max lean, it doesn't change much. I am using a clean chassis ground source for my other lead. Anyone have experience with this, or an explanation as to why I am not getting a 5v signal?

    Could it be because the signal is changing so fast and it is taking an average? I am using a high quality fluke multimeter.
    Last edited by manneurex; 05-08-2019 at 08:54 PM.

  2. #2
    Join Date
    Jun 2004
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    The D, MI
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    97 M3, 98 328i, 13 Cruze
    What's the part number of the controller?

    Check the user manual. The white wire might be a 0-1v output to stimulate a narrowband sensor. Check for an orange wire that should be your 0-5v analog output.

  3. #3
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    '86 325e, '14 VW EPA
    What does it read with the sensor unplugged?

  4. #4
    Join Date
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    96 Hellrot 328is Turbo
    It is an AEM 30-4110

    The user manual states that the white wire is 0-5v analog signal. This corresponds with the directions that came with it.

    https://www.aemelectronics.com/files...GO%20Gauge.pdf

    - - - Updated - - -

    Quote Originally Posted by TheJuggernaut View Post
    What does it read with the sensor unplugged?
    I will definitely have to check that when I get home. I think it is supposed to read like 2.38v per the manual.
    Last edited by manneurex; 05-08-2019 at 09:22 PM.

  5. #5
    Join Date
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    There's a little dial to turn to configure the output on those. Page 12 is what you need.

  6. #6
    Join Date
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    Quote Originally Posted by Kevin325i View Post
    There's a little dial to turn to configure the output on those. Page 12 is what you need.
    THANK YOU!!!!!! I skipped that part because I thought it was only applicable to using the AEM standalone. I am eternally grateful. And I need to learn how to read.

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