I understand having idiot lights for idiots, and sure, do that on the dash, but please give end users any way to get some actual info. It’s the “door ajar” when the vehicle knows which door but doesn’t disambiguate to the user. It’s bad design, or malicious design to boost dealer profits.
Steering angle: 0 degrees
LF wheel speed: 305 rpm
RF wheel speed: 293 rpm
LR wheel speed: 302 rpm
RR wheel speed: 285 rpm
In this case, it may be possible for the car to determine that you probably have some incorrect pressures, but it may not know exactly which tire(s) is/are wrong. Nor does it know what the pressures are.
It also perfectly calculates distance to empty in miles/kilometers.
2021-2023: https://parts.ford.com/shop/en/us/electrical/other-electrica...
2015-2020: https://parts.ford.com/shop/en/us/electrical/other-electrica...
2013-2014: https://parts.ford.com/shop/en/us/electrical/other-electrica...
In fact, your example looks more like one overinflated (or perhaps overheated) tire --- RR.
You still don’t know for sure that it needs inflated, because:
1. setting tire pressures incorrectly is not uncommon
2. That button is user accessible and might be pressed inadvertently or by someone who didn’t set the tires correctly
3. If all tires change in pressure at the same time, it would be undetectable
This is why these systems generally tell you to “check” your tires, rather than inflate a specific one. If they made that assumption, your car could be telling you to inflate an already overinflated tire.
There are many cars with tpms in the wheel that still won’t tell you what wheel it is or what’s the pressure, so I still much rather have no sensor to deal with trading the “inconvenience” of checking the tires once the light comes on, which is what you would do anyway.
I was explaining why the engineering of the system dictates the information that the interface provides.
I don’t care what pressures the tires have as long as they are good. If I stop to inflate one, I check all of them anyway, with a real gauge. But that’s just me, I know.
The transponder in each tire just shouts out its serial number and pressure on 315mhz and then sleeps for a random amount of time. The car counts how many times it has heard the various serial numbers, and assumes the top four most frequently heard serial numbers are its own tires (as opposed to those on the car next to it).
It is sort of stupidly easy to gather location data from TPMS sensors. If I ran a major criminal gang I'd track the cop cars this way. 315mhz is almost VHF, it goes a long way. One receiver per city block should do it. Covering your turf would be easy.
Other vehicles actually know which is which without being told. I'm not sure exactly how this is done, but I'm guessing/vaguely recall hearing they do this by using multiple receivers.
As for tracking from a distance - these sensors have very low output power, and a lot of their signal is blocked by the metal wheel. It can somewhat be done but you'll need more than one receiver per block if you want 100% coverage.
Sources: worked as a tire shop technician for a while, messed around with SDR, read a lot online. Also: https://web.wpi.edu/Pubs/E-project/Available/E-project-09111...
That's one of the revelations from Snowden files. Us govt does this!
It's always been this way.
Uhhh, except I have an OBD-II adapter in mine[0] and combined with an Android app[1] can see in detail basically everything about the car, including individual battery voltages inside the cell pack?
You can now monitor a piece of data you have no means whatsoever to adress outside of the tesla ecosystem. which is thrice fold not an issue with "open-er source" ICU vehicles because: 1. no concern for this battery (obvious I guess) 2. you can bring it to the mechanic down the street, 3. You can do it yourself with parts you source with a warranty that the dealer does not care about.
If your battery "starts to go", do you think you can go anywhere besides Tesla, and that they will not first charge you for a diagnostic using their license ODB2 software? Your diagnostic using a non licensed odb2 scanner and....android app will not allow them to bypass the diagnostic you will certainly have to have done by them, because of their insurance/warranty process requiring licensed equipment. ICU manufacturers DO pull the same shit, but you can at least bring the car to a cheaper mechanic who is hopefully footing the bill of the tooling/license.
Say you ARE Able to perform work outside of Tesla, better not tell Tesla that, or your vehicle will be blacklisted.
Huh, I guess I was just imagining it when I plugged into the OBD-II port on my 2020 Ford and reprogrammed a bunch of engine and transmission parameters to improve performance. I certainly didn't have any proprietary Ford software or hardware.
There are some boutique companies, and even some oems [2] that provide software to retune your engine but I have no experience, nor desire, to do that kind of tinkering.
1-https://www.amazon.com/Scanner-FORScan-Adapter-ELMconfig-Dia...
I don't have the expertise to set up all the parameters on my own, but I'm very happy with the tune they provided.
You can't do that with a generic OBD-II compliant tool and Ford's OEM firmware.
I am particularly thinking about John Deere. Although not specific to Electric vehicles.
In your example, have you since taken it to ford and told them you did this? Better not, as you've broken your warranty and they will see this and report that to you.They will put this information on record, and you now have a nightmare selling the vehicle.
Again, and your example is a good one, ICU vehicles and manufacturers are at least addressable/self repairable. This is not the case so much for electric.
Mine was $150 and came with Honda support. Other manufacturers can be downloaded for $50.
isn't that the way every industry intersecting with IT behaves, and isn't there always someone else fighting to open it up, so https://github.com/iDoka/awesome-canbus A curated list of awesome tools, hardware and resources for CAN bus
Want to link into any car in the last 5 years can-bus for anything beyond simple air-fuel mixture issues? You can't. You can't even reliably go to a mechanic down the road, as they don't carry the 500k a year license from GM for the proprietary OBD2 scanner.
This problem is 10 fold with electric cars, and 100 fold with Tesla or boutique EV manus.