2015 Information Display DTE calculation error?
Thread Starter
|
Mountain Pass
Joined: Feb 2010
Posts: 113
Likes: 6
From: Pacific Northwest
It's not the T/H setting that changes the calculation (but that's not a bad idea!). It's in the setting menu of the center display. It appears that the DTE calculation is a combination of fuel tank level, historical MPG with an added bias on whether you have to DTE setting set to "Tow" or "Normal", telling the computer how you intend to use the truck on the remaking fuel level. As I said earlier, my 2.7L truck works as expected, the 3.5L Eco, not so much.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
But, if you haven't run in T/H you don't have an average T/H MPG. So, there must be a default T/H MPG in the system. Otherwise, when you change the DTE calculation to use the T/H average it wouldn't be able to calculate.
Perhaps the default T/H MPG is unrealistically high, so when I changed DTE to T/H the result was actually higher than Normal?
Perhaps the default T/H MPG is unrealistically high, so when I changed DTE to T/H the result was actually higher than Normal?
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
Maybe be it checks past mpg based on what trailer you are towing at the time. So if no history of towing a/this trailer it goes with the default factory one. But once you start towing a trailer it then uses what you are getting now figures.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
That's pretty much what I'm guessing, although I forgot you can name the trailers. So, if it was programmed for it the average MPG could be recorded by trailer and used to calculate DTE. However, then it would have to handle the situations where you run in T/H but aren't connected to a trailer. So, I'd bet it just records average MPG for any time you are in T/H and uses that to calc DTE.
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
That's pretty much what I'm guessing, although I forgot you can name the trailers. So, if it was programmed for it the average MPG could be recorded by trailer and used to calculate DTE. However, then it would have to handle the situations where you run in T/H but aren't connected to a trailer. So, I'd bet it just records average MPG for any time you are in T/H and uses that to calc DTE.
It should make no difference what transmission mode you use.
But even than it would have to strongly figure in what you are getting in the pass few miles and keep up dating the DTE miles.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
So, how do you figure in the Tow/Haul mode? You can tow without being in T/H mode on the transmission. Does that make any difference?
And, if you don't have a trailer attached but go into Tow mode for DTE, why does the DTE change?
Note that I don't have any answers, just lots of questions.
And, if you don't have a trailer attached but go into Tow mode for DTE, why does the DTE change?
Note that I don't have any answers, just lots of questions.
Thread Starter
|
Mountain Pass
Joined: Feb 2010
Posts: 113
Likes: 6
From: Pacific Northwest
You change the DTE calculation in the Settings menu on the information display between the gauges.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
So, how do you figure in the Tow/Haul mode? You can tow without being in T/H mode on the transmission. Does that make any difference?
And, if you don't have a trailer attached but go into Tow mode for DTE, why does the DTE change?
Note that I don't have any answers, just lots of questions.
And, if you don't have a trailer attached but go into Tow mode for DTE, why does the DTE change?
Note that I don't have any answers, just lots of questions.
As to why not having a trailer attached and switching to T/H mode changes the DTE it's because the different shift points causes you to get diferent mpg. Now as to why it thinks T/H mode is going to get you better mpg,,might be because it hasn't been driven long enough to get a update over the factory default mpg yet.
But what do I know??? I'm still trying to figure out how to get my halo lights to work. And that my cooled seat back shouldn't make my back sweaty.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Yes, I've done that. But, the question is whether the calculation uses an average MPG that has been achieved in the transmission's Tow/Haul mode, regardless of whether a trailer has been connected. Or, an average achieved while pulling a trailer - regardless of the transmission mode, Normal or Tow/Haul. And, if the latter, is it just while pulling any trailer? Must be as there's only one selection in the DTE calc - not one for each of your trailers. Unless the DTE changes when you connect/disconnect a specific trailer.
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
Yes, I've done that. But, the question is whether the calculation uses an average MPG that has been achieved in the transmission's Tow/Haul mode, regardless of whether a trailer has been connected. Or, an average achieved while pulling a trailer - regardless of the transmission mode, Normal or Tow/Haul. And, if the latter, is it just while pulling any trailer? Must be as there's only one selection in the DTE calc - not one for each of your trailers. Unless the DTE changes when you connect/disconnect a specific trailer.
But just because we think something should work one way doesn't seem to mater on this truck.
I have three different trailers I'll pull with my truck but so far have not done any pulling. So I have no first hand experance yet.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Now we would think that it would keep track of which trailer was pulled last and use that mpg if you just switched to towing DTE to get a idea without having a trailer attached. And if a trailer was attached use its history mpg.
But just because we think something should work one way doesn't seem to mater on this truck.
I have three different trailers I'll pull with my truck but so far have not done any pulling. So I have no first hand experance yet.
But just because we think something should work one way doesn't seem to mater on this truck.
I have three different trailers I'll pull with my truck but so far have not done any pulling. So I have no first hand experance yet.
Seriously, I have two trailers myself and another across the fence I could easily borrow with which to answer the question. But, I've not done that either. Guess we aren't so curious after all?
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
So with about 25 miles into a full tank my normal setting shows I can go 670 miles till empty, but switching to tow I can go 740 miles to empty. Guess I should start towing a trailer all the time??? Just makes it hard to park at Wallyworld..
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
Right,,, the magic EPA ones.