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SPN 925 FMI 5 optimized idle weirdness

Discussion in 'Freightliner Forum' started by PermanentTourist, Sep 2, 2018.

Page 2 of 2
  1. Aug 11, 2020 #12
    WillFreshour1978

    WillFreshour1978 Bobtail Member

    8
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    Feb 28, 2020
    0
     
    WillFreshour1978, Aug 11, 2020
    WillFreshour1978, Aug 11, 2020
    #12
  2. Aug 11, 2020 #12
    WillFreshour1978

    WillFreshour1978 Bobtail Member

    8
    2
    Feb 28, 2020
    0

    I looked at a truck for purchase... it’s “idle mgmt” light was out. Also I checked

    I looked at 2015 113 cascadia with fault 5 spn 925 eng 0... it’s “idle mgmt” light was out. However, I checked code with this link ...Cancomm Web Administration.
    It states”Digital Output 3/17 Open Circuit (broken wire, terminal floating)”
     
    WillFreshour1978, Aug 11, 2020
    WillFreshour1978, Aug 11, 2020
    #12
  3. Dec 16, 2021 #13
    alberto695

    alberto695 Bobtail Member

    1
    0
    Dec 16, 2021
    0
    we're is that located
     
    alberto695, Dec 16, 2021
    alberto695, Dec 16, 2021
    #13
  4. Dec 16, 2021 #14
    PermanentTourist

    PermanentTourist Heavy Load Member

    749
    881
    Nov 9, 2016
    48 states + Canada
    0
    20211216_092546.jpg
     
    PermanentTourist, Dec 16, 2021
    PermanentTourist, Dec 16, 2021
    #14
  6. Mar 18, 2022 #15
    Japp

    Japp Bobtail Member

    3
    0
    Mar 18, 2022
    0
    Hello everyone, I’m facing the same problem with my 2015 freightliner Cascadia, Both the check engine lights are on when I check in the Diagnostics the codes I get I have attached the pictures, if anyone can help guide me what to do or where to go it will be much appreciated ( I’m from Indiana) any mechanic that can fix this issue I can go to him. Thanks
     

    Attached Files:

    Japp, Mar 18, 2022
    Japp, Mar 18, 2022
    #15
  7. Mar 20, 2022 #16
    PermanentTourist

    PermanentTourist Heavy Load Member

    749
    881
    Nov 9, 2016
    48 states + Canada
    0
    Replace the optimize idle alarm unit, like I did. Get one at freightliner, it's like 25 bucks and it takes 5 minutes to replace, very easy to do it yourself
     
    PermanentTourist, Mar 20, 2022
    PermanentTourist, Mar 20, 2022
    #16
    Japp Thanks this.
  8. Mar 20, 2022 #17
    Japp

    Japp Bobtail Member

    3
    0
    Mar 18, 2022
    0
     
    Japp, Mar 20, 2022
    Japp, Mar 20, 2022
    #17
  9. Mar 20, 2022 #18
    Japp

    Japp Bobtail Member

    3
    0
    Mar 18, 2022
    0
    the optimize idle doesn’t work in my truck the person who had it before me deleted it, so should I still get the alarm unit and replace it?
     
    Japp, Mar 20, 2022
    Japp, Mar 20, 2022
    #18
  10. Mar 20, 2022 #19
    PermanentTourist

    PermanentTourist Heavy Load Member

    749
    881
    Nov 9, 2016
    48 states + Canada
    0
    I'm guessing the engine control unit is still finding the fault in the alarm even though the optimized idle is disabled. I guess you can either replace the alarm or just ignore the check engine lights because they don't indicate anything actually bad. I wouldn't recommend that though, if something bad actually happens and you get a real important check engine light, you won't notice

    Also, with the gas prices these days, unless you have an APU, maybe consider turning the optimized idle back on? You can save a lot of money in the summer...
     
    PermanentTourist, Mar 20, 2022
    PermanentTourist, Mar 20, 2022
    #19
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