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Adaptive cruise control problem

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jetinc2016, Mar 3, 2020.

  1. Mar 3, 2020 #1
    Jetinc2016

    Jetinc2016 Bobtail Member

    3
    0
    Feb 13, 2020
    0
    Hey guys I hope someone can help me. I have a 2015 Peterbilt 587 VIN 262267. I’ve truck for 2 years and I’ve had nothing but problems with my cruise control it doesn’t work I get codes I attached photo. It use work I would set the speed and it would work for a little while than it would kick me off. This also happens if it rained it would kick me off or if I come to a complete stop and I would get going again I would try
    setting again and it won’t work.



    codes I get

    SPN 93
    FMI 4

    SPN 886
    FMI 14
     

    Attached Files:

    Jetinc2016, Mar 3, 2020
    Jetinc2016, Mar 3, 2020
    #1
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  3. Mar 5, 2020 #2
    Inderjit

    Inderjit Heavy Load Member

    716
    703
    Sep 17, 2017
    0
    Neither of those codes should stop the cruise control from working. The first one I believe is for the
    relay valve that applies the rear service brakes. It has a solenoid on top of it that the adaptive cruise
    control and traction control uses to apply the brakes. There is a connectivity problem or the solenoid has failed.
    The second fault is for the headway forward antenna which is the radar antenna at the front bumper. It may be dirty or there is a problem with it. When the headway controller can't function the cruise control should work still without it. It just works like a normal cruise control.

    When you scanned the truck did you verify that the cruise on/off, set/resume, brake and clutch and park brake switches were all functional?
     
    Last edited: Mar 5, 2020
    Inderjit, Mar 5, 2020
    Inderjit, Mar 5, 2020
    #2
  4. Mar 5, 2020 #3
    Jetinc2016

    Jetinc2016 Bobtail Member

    3
    0
    Feb 13, 2020
    0
    Yes they all work. I had a bad abs harness in the rear axle which I fixed. I understand that cruise control can still work but I’ve read that after a while of not communicating with front radar that it will not work until serviced.
     
    Jetinc2016, Mar 5, 2020
    Jetinc2016, Mar 5, 2020
    #3
  5. Mar 21, 2023 #4
    leveluptruckingllc

    leveluptruckingllc Bobtail Member

    1
    0
    Mar 21, 2023
    0
    Did you find the solution ? Im getting the same code (spn 886 )and my cruise stop working as well .
     
    leveluptruckingllc, Mar 21, 2023
    leveluptruckingllc, Mar 21, 2023
    #4
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