Carpokes

Ken G wrote: Fri May 02, 2025 9:58 am I don't know if this works on the 718 and didn't have the guts to try enabling it with auto coding using the PIWIS.

@Lynx man said, "I am trying to code a 981..." so we may or may not be able to see anything like that in the 718s. It's worth looking at, though.

Arne2 wrote: Fri Sep 01, 2023 2:57 pm

J-Dub wrote: Tue Aug 29, 2023 7:51 pm @Arne2 With the X431 can you change the TPMS nominal tire pressure set points? From a google I see it can be done with the PWIS, not sure if that functionality is in the X431 as well.

Yes - System Selection > Instrument cluster > Brush Hidden/Modified > Search for Coding items

Search for 'Nominal' and all the TPMS choices come up. Note that they are listed with front (VA) and rear (HA) separately, and are not listed in PSI, or even kPa like the door jamb sticker shows, but in bar. (1 bar = 100 kPa)

I know this is a while ago, but just found this super useful thread. I'm trying to add an item to my 718 GT4 for 19" Track I know I need to write it as "19'' Track" using two apostrophes instead of a quote for the character limit, and I've found the nominal items in the brush hidden/modified section but I can't figure out how to enable one of the disabled sets of tyres sizes and rename them. I can see all sorts of 18" and 19" selections (summer, winter, comfort pressure etc) but no idea where the names are that are connected can anyone point me in the right direction?

Thank you

From memory there are several pre-defined tire types and then one that you can name anything you like. It was named something like user defined, this is the one I named 19" Track plus some spaces to get the required character count.

I remember 4 distinct TPMS menus and one was to enable/disable each type. Two were to manipulate things in the predefined tire attributes like pressure set points, and if you wanted to add comfort pressures etc The last one was not useful at all for what I was doing but could be useful for others, I think it contained the tire circumference.

If needed I can have a look.

J-Dub wrote: Mon Mar 30, 2026 7:03 pm From memory there are several pre-defined tire types and then one that you can name anything you like. It was named something like user defined, this is the one I named 19" Track plus some spaces to get the required character count.

I remember 4 distinct TPMS menus and one was to enable/disable each type. Two were to manipulate things in the predefined tire attributes like pressure set points, and if you wanted to add comfort pressures etc The last one was not useful at all for what I was doing but could be useful for others, I think it contained the tire circumference.

If needed I can have a look.

if you have time that would be amazing I've spent the last several days reading every thread on this on all the major forums and I'm still thinking I've missed something as others seem to think it's super clear. I'm going to go look at the car again, one thing is if I do the search for TPMS will all the menus be found or is there something else to look at? It's tough because on the X431 every other time I hit the back button from looking at something all the results go away, then I have to search again and sort of start over.

So I think I figured it out, something I read said I had to use the search function find the TPMS values and modify it that way I just figured out if I scrolled down I could find I think 4 different TPMS and under each of these things are more clear about what you're changing for track tires I selected an item with a name of like "summer/free text" and under one of the categories I could set the name, another the pressure (1.7 bar which is 25 psi is the lowest you can set) and then under the last one you can pick to enable it in the display.

The way I got there is after picking "Instrument Cluster" I then picked "Code/Brush Hiding" and then under that "Brush Hidden/Modified" and then just scrolled that screen until I found TPMS. For some other items like the seatbelt chimes I had to use the search function though.

Yes, I think you are getting there. Try updating the free text one to something you like and also enable comfort pressure.

It will still ding at you under 1.7 unfortunately.