Freightliner Cascadia DD15 2018 Code ICUC 523002 31

Discussion in 'Freightliner Forum' started by emilko, Oct 16, 2023.

  1. emilko

    emilko Bobtail Member

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    Feb 4, 2018
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    What it could be ? The last update on my truck was installation of WEBASTO Engine coolant heater, just couple days ago. I don't know if that kind of work affected ICUC. My question is if I should look for help at truck repair shop ASP, in an order to avoid possible breakdown, or I can wait until I finish this trip? Thank You
     
    Last edited: Oct 16, 2023
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  3. SWM_TECH

    SWM_TECH Light Load Member

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    Apr 15, 2018
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    In the New Cascadia troubleshooting manual it shows that SPN 523002 FMI 31 is ICU (SA23) telling you that EEPROM checksum Fault-Condition exists. FYI "Instrumentation Control Unit =ICU"
    Possible causes is Internal hardware failure.
    Trouble shooting steps are short. Program the ICU with the "Newest" software available on server, if available. Otherwise, program the ICU with the "latest" settings or the "Factory" settings.
    If the programming was successful and SPN 523002 FMI 31 in now inactive nor further action is necessary. If "No" then replace the ICU.
     
    Last edited: Oct 16, 2023
    Reason for edit: Grammar
    QUALITYTRUCK, RocketyMan and emilko Thank this.
  4. emilko

    emilko Bobtail Member

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    Feb 4, 2018
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    Thank you. I will look at it
     
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