Ghost Braking

Discussion in 'Fedex Freight' started by mattbob, Sep 1, 2016.

  1. mattbob

    mattbob Active Member

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    I;m telling you...................smurfs are the solution
     
  2. Crazy Trucker

    Crazy Trucker Clown Math Expert

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    Lol no reason to lie were your friends red.
     
  3. Crazy Trucker

    Crazy Trucker Clown Math Expert

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    Lol
     
  4. SwampRatt

    SwampRatt Well-Known Member

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    Whatever Red... That's me bro, asinine to the core. But do you really think that no one has thought of checking the system, before shutdown? Perhaps? Sure. Likely? Not very...

    Rather than re-state the case, you need to understand that comprehensive analysis requires one to consider all of the possibilities.

    In case you don't realize it, I'm giving you a pass on the idiocy of your rant.
     
    Last edited: Mar 5, 2017
  5. Crazy Trucker

    Crazy Trucker Clown Math Expert

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    You also assume to know what your talking about but don't, and now your changing your story.
     
  6. SwampRatt

    SwampRatt Well-Known Member

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    Nothing to disagree with there. As for your last sentence, I have no problem making the call, even though I've not experienced this phenomena. When time allows, I'll make the effort... Knowledge beats speculation every time.
     
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  7. Redracer3136

    Redracer3136 BANNED

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    Seeing as how the company denied that these events were even occurring because there were no codes to validate their existence until they were captured by the forward facing cameras, I'm suggesting comprehensive alalysis is still in its infancy...and the mfg's still aren't sure what's causing it.

    Honestly, how many times do you really think someone has encountered ghost braking while on the yard where a company shop is present...and of those times, how many times where the ECM's actually checked while ghost braking was still active??

    Again, to assume that "it's probably, you think, likely been tried" is asinine considering it's only been a few months since the company accepted the fact that there's an issue...before then, why would they look for something that they didn't believe existed??

    No pass needed...the condescending tone of your post suggest that we're right, thx. :1036316054:
     
  8. Redracer3136

    Redracer3136 BANNED

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    Says the UNtruth monster....and when did I change my story??
     
  9. johndeere4020

    johndeere4020 Well-Known Member

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    Let me backup and get some clarification for those of us that don't have this system. Feel free to correct me because I'm not arguing just trying to understand.

    Ok the truck does this "ghost braking" thing (I'm aware what happens based on reading it here and talking to your drivers first hand no need to rehash that) in the past before the camera system it would do it, you would shut off the truck or apparently in some cases just keep driving and it would miraculously just stop correct? And before the camera system the company didn't believe it was happening correct? So apparently something is happening and no fault code is being stored or the shop would have been able to diagnose it, right so far? So if a truck is actively "ghost braking" would any curious person want to have a look at it while it's active since we've already determined there is no stored code? I know I would, all fair questions by the way. I'm truly interested because these are situations you refer back to later when your trying to fix a problem, you know past experience teaches a lot. Ok let me have it.
     
  10. Redracer3136

    Redracer3136 BANNED

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    All questions are fair and correct...the problem lies with ghost braking usually isn't active while on the yard. In every case that I'm aware of, ghost braking happens while "on the road" and either clears up on its own or the driver resets the ECM themselves and once arriving at a yard where a shop is present, there are no codes stored in the ECM pertaining to this issue.
    In my original example, luckily for our driver the ghost braking started just a few miles from our yard and he managed to limp the truck back safely while keeping the issue active instead of resetting the ECM. He immediately drove to the shop before powering down the unit in an attempt to find out what was causing the issue. Would a code have been present? Could questions have been answered? Perhaps, perhaps not, but now we won't know until the next time a truck is on the yard with ghost braking active, which is rare...a missed opportunity IMO.
    For those who "think" this has already been checked, again, perhaps, perhaps not. There's been no mention of such activity with our shop, nor as any been relayed by other shops if it has. My argument is why would they have checked for something that they didn't believe existed until just a few months ago?? The probability that a truck was on a yard with a shop while ghost braking was active in the last few months is very minuscule IMO...especially since it's the first time it's happened in almost two years at our center.
     
  11. johndeere4020

    johndeere4020 Well-Known Member

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    I guess my next question is is this an aftermarket system or factory and what is controlling it? Could be the ECM has nothing to do with it therefore wouldn't store a code? It would be interesting to observe the crash mitigation system while in a fault status which seems to be a rare opportunity. It definitely needs addressing asap.
     
  12. SwampRatt

    SwampRatt Well-Known Member

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    I don't know about "letting you have it" :idunno:. I know what you know, more or less.

    I do know the vendor had denied the phenomena, for some time. I listened while they blamed it on assorted "events". Events they said the driver may have been unaware of. In essence, the vendor explained it away as driver error, of one sort or another, in every reported (at the time) case.

    I know the on-board cameras paint a different picture. Now the issue is known to be real, but relatively rare. I have no numbers to put that into perspective, as far as how rare, isolated, etc.

    I'm out, on the discussion of codes captured, not captured, how to preserve data, etc. Beyond speculation and curiosity, I've got little to add. I might ask questions, in a effort to learn something, and possibly contribute to the analysis portion of the discussion, but that's it.

    Unless it has already been tried, I stand by my original position, that a directive on policy should be in place, and shared with both drivers and mechanics, as far as what to do "if" such an event occurs.

    If I learn more facts, I'll share them.:smilie93c peelout:
     
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  13. Big Dave

    Big Dave Dispatcher for Team BRG-Wong

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    [​IMG]

    I found this bastard messing with my brake pedal.
    But he flew away before the mechanic came out.....
     
  14. citydog

    citydog Well-Known Member

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    I'm not 100% sure but it is factory installed. On another not I thought it was limited to one brand of truck until Saturday where it happened to one of my counterparts in another brand truck. IMO it's a problem with the crash mitigation system and is something that needs to be fixed before it causes a major incident on the road. The pavement is not always dry and straight.
     
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  15. Crazy Trucker

    Crazy Trucker Clown Math Expert

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    As long as your truck was running the mechanic could have determined where he came from.:17142:
     
  16. Redracer3136

    Redracer3136 BANNED

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    The collision mitigation systems on the Volvo & KW's are Eaton's, Freightliners are Meritor, and not sure what the International's use but I'm guessing Eatons as well. These are all systems that are installed by the truck manufacturers on behalf of Eaton and Meritor.

    From our experience in CLT, the Freightliner/Meritor system experiences this issue a lot more than the Eatons but we don't have the ELD/cameras yet which are known to effect the Eaton system.

    Its been "speculated" that the eye on the front bumper is sensing a rear end collision (for whatever reason) when there's nothing in front of us and it signals the ECM to apply the brakes. The reasoning behind wanting to hook to a laptop while active is to test this theory since for whatever reason, no code is being flagged once the unit is powered down.

    I'm not a mechanic but one would think the problem has to lie within the eye/sensor, the sending units, the ECM, or the wiring harnesses that connects the various parts of the collision mitigation system...I mean, there's only so many things to choose from...
     
  17. johndeere4020

    johndeere4020 Well-Known Member

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    I was just poking with the let me have it comment, just an interesting conversation.
     
  18. johndeere4020

    johndeere4020 Well-Known Member

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    So apparently the Meritor system sucks as bad as they're transmissions did?
     
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  19. johndeere4020

    johndeere4020 Well-Known Member

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    Should have kept the door closed, or swatted him with your hat.
     
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  20. Redracer3136

    Redracer3136 BANNED

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    Yeeeeessss!!!!!
     
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