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Anyone have a barney style information card or guide on them
the OM and the sync 4 is vague to say the least
my question is if the truck knows how much weight you add in and changes the scale meter thing
wouldn't that mean it also knows how much it weighs, before you add stuff to the cargo box or hitch up a trailer
the center stack set 325 as passenger weight for 2 persons
so how does it know if you exceed the cargo weight limit, if it does not know its weight?
it would be nice to see actual empty weight, then set a zero and it know exactly how much until your at gvwr
or am i wishing upon a golden ticket
thanks i saw some of those, helped a bit
but it made me ask more questions
how does truck now its own weight to know your still within gvwr? if it does, then we maybe can tap that to see the trucks unladen weight before we hitch up or load the cargo box
and since it has sensors on all 4 wheels, it knows the weight on those wheels???
The scale shows remaining payload, which is just GVWR minus curb weight. Ford says it is an approximate number within a margin of error, so maybe it was programmed with the VIN specific value during build or more likely a close approximation based on some typical configurations. Maybe some poking around with Forscan could reveal where the onboard scales config resides...
The truck does not really weigh anything - it just does some computation and approximates weight added or removed based on suspension travel.
The scale shows remaining payload, which is just GVWR minus curb weight. Ford says it is an approximate number within a margin of error, so maybe it was programmed with the VIN specific value during build or more likely a close approximation based on some typical configurations. Maybe some poking around with Forscan could reveal where the onboard scales config resides...
The truck does not really weigh anything - it just does some computation and approximates weight added or removed based on suspension travel.
yup
Your last lines
It knew what it was told or programed it's gvwr and maybe empty weight was ...and compares sensor movements to give us payload..etc
So maybe we can find a display of what started at...to what we are now
it's interesting system
on the vdm vehicle dynamics module...it lists vehicle gvwr in hex a decimal , as well as sensor calibrations
i need to do some digging
I was rolling around under my truck just for fun, and noticed a big box mounted to the inside of the driver's side frame rail under the bed. There's a 2-bar linkage connecting a bracket on the spring shackles to a little shaft on the side of the box. I assume there' some kind of encoder or potentiometer inside the box. When the box compresses, that linkage would turn the shaft, and some kind of processor converts whatever is measured (resistance, pulses, ?) into a weight reading.
But wait, there's more. Behind the front wheel, on the outside of the frame rail, there's another linkage hooked up to a little rotary device. It must feed back to the same processor as the rear one and the combined data is the total weight. That's part of the reason I weighed both axles on my truck with it empty, I can used those weights to "zero" the no load condition.
I was rolling around under my truck just for fun, and noticed a big box mounted to the inside of the driver's side frame rail under the bed. There's a 2-bar linkage connecting a bracket on the spring shackles to a little shaft on the side of the box. I assume there' some kind of encoder or potentiometer inside the box. When the box compresses, that linkage would turn the shaft, and some kind of processor converts whatever is measured (resistance, pulses, ?) into a weight reading.
But wait, there's more. Behind the front wheel, on the outside of the frame rail, there's another linkage hooked up to a little rotary device. It must feed back to the same processor as the rear one and the combined data is the total weight. That's part of the reason I weighed both axles on my truck with it empty, I can used those weights to "zero" the no load condition.
that's them
Those puppies give info for weight as well as a few other items
OK, here's an oddity I noticed. There is a rigid plastic tube that goes from that box up to the nub under my gas cap where diesels have their additive added. What is that tube for? And if a diesel uses that nub for adding additive, where would a rigid tube corresponding to mine go to?
The system can be zero'd out when empty and senses movement away from zero when weight is added. It can be done at factory or my guess most likely at dealer during PDI when they take truck out of transport mode. It uses these height sensors to interpolate weight from known heights (empty and max cargo cap). It really doesn't know the weight you put on it just movement caused by it. So many other factors come into play which makes it more of a guide then a true 'scale'. I ordered it on my F-350 tremor and curious how it will operate. However, I'm also going to add air bags to rear axle so this will effect accuracy of course. Still nice to see delta changes when adding / removing weight.
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