Braking assist

[Riley1131]

Can anyone tell me if this can be disabled and if so how to do it on a 2021 t680 with cummins. I was coming down i65 Friday running 75 mph with nothing around approaching a under pass and this thing stabbed the brakes so hard then immediately released them but I nearly lost it. I was grossing 79k with a load of steel on the back. It stabbed so hard I got out and made sure it didn't tear anything up in the brakes. Thank God it wasn't raining.

[marek4792]

If I'm not mistaken and I may be wrong but I think on Insite it's in the cruise control settings you have to switch from predictive or whatever its called to traditional? Otherwise it has to be turned off through the chassis software and stealerships won't do it for liability reasons..

[Riley1131]

Ok im going to get someone to see if they can do it. My experience with the dealerships is pretty much same as yours they dont want to mess with it. I guess when it locks it down like that if u lose it nobody around to tell the story. Everyone i know that has drove rucks with it in it has experienced it at some point or another. Maybe a little cash to the right person at kenworth would do the trick. Ive come to the conclusion with these new trucks you cant just have a mechanic you need a computer programmer, mechanic with access to every software known to man and with all that u need quite a bit of good luck as well. Thanks for your reply it gives me a starting point. I plan in the future to get as much access to this computer stuff as I can, just trying to read up and educate myself on it all before firing up mission control in here lol

[Riley1131]

A big problem im running into these days is I guess me. Im tired and ill i basically live on the road so even if was nice nobody sees me . My point is I never make friends with right guy because even if I stumbled upon him in a steel mill or a rest area , im basically a old asshole and he probably wont be jumping to do me any favors. Im sure there's some young kid out here that can hack, program and all that but definitely not running in my crowd. If u need to get a wide load up some steep ass snowy mountain backwards im your guy. When it come to computers, insite, calterm, or hacking into kenworths main frame I might as well be blind and lost in the woods.

[SquareOne]

I know exactly what you're dealing with!

My International LT625 does that stupid $hit... absolutely can't stand it! Will randomly display 'Collision Imminent" and scare the hell out of ya, because you know there is nothing that can be done if it wants to stab the brakes.

Mine will typically do it late in the afternoon while heading East coming out of the Mobile tunnel on I-10. Almost as if it momentarily sees the tunnel shadow/ceiling against the bright sky as a hazard. Just like mentioned in the first post above -- bright sky with a shadow from something (like an overpass). It will also sometimes do it to me late at night if the reflection from a digital message board hits the radar just right.

Like Marek mentioned, you can change the cruise type to traditional within the ECM, but it will leave a constant warning on the dash and still will not solve the issue. The Bendix On-Guard is tied into the ABS module and will have a conflict with the ECM if the cruise is not set in the proper configuration. For me, maybe if I had the body control software (Diamond logic) maybe then I would have a chance at shutting it down. This would most likely be what you need as well... something to communicate with your truck modules and have the ability to change the configurations.

If someone has a suggestion, I too would love to hear it. This stupid a$$ system is straight up dangerous!

[mikkhh]

What happens if you do not use cruise control? Does the emergency brake still kick in?

What happens if you press throttle? Will throttle override the braking?

[Riley1131]

Yea wasn't on cruise control. I think its all tied
together though. Ive had other trucks do it before , this time just scared me at that speed with that kinda load on it, stabbing the brakes is a good way to tear shi#t up at best and kill a bunch of people including me at worst. If that sensor thinks its about to hit something it locks the brakes weather u have cruise on or not. A shadow is a bad reason to lock it up. Everytime its happened to me it has always released pretty much immediately but my buddy drives a international lt and he said his locked it up and took him all the way down to 20 mph ive never had that happen but if it locked it up grossing 80k and held it to 20mph chances of breaking something would be pretty high.it stabbed harder then I would ever hit the pedal.

[SquareOne]

(Yesterday )mikkhh Wrote:  What happens if you do not use cruise control? Does the emergency brake still kick in?
What happens if you press throttle? Will throttle override the braking?

It does it regardless if using cruise or not. Throttle input won't stop it either. Once the system 'sees' danger, it takes priority and stabs the brake. And Riley is correct. Aside from an actual emergency, you would never hit the brakes as hard as the truck will do to itself.

There is an area that if I go through in a certain part of the day (early afternoon with a bright sky), it will almost certainly quick-stab the brakes. I've tried rolling into the throttle, cruise on, cruise off, and even putting it in neutral letting it coast with no throttle input --- still does it.