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[SOLVED] Carplay has suddenly started crashing :(

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2.2K views 7 replies 4 participants last post by  nicknames  
N
#1 ·
Morning all,

I have looked high and low on the internet for the answer to this and nothing has worked. In recent weeks, Carplay has systematically started freezing when on a call, to the extent that the screen is dead and I cannot switch between apps (meaning, for example, that I cannot have Google Maps on at the same time).

I have tried everything - several different cables, disabling VPNs, updated iphone software. The only thing I haven't been able to do is find the latest software for the head unit. Some forums suggest there is a lesser know 2022 update, but I have not been able to find it.

Bottom line is I am totally and absolutely stumped and have tried everything before coming here. I suspect it is linked to IOS 18 but this is unconfirmed.

Is anyone having the same issue? Does anyone have even the slightest idea how to remedy it? I know Carplay is a bit of a luxury but for me it's a key component of a well functioinng car!

Thank you!
 
Discussion starter · #3 ·
Just coming back here to say I have fixed this after MUCH effort, so I am going to leave the how-to here for the internet to come and find.

The main thing is you need to update the firmware on the CHR unit. This is not as simple as it may sound. The last update was from 2021, it appears that many cars don't have any update older than 2019.

The first thing you need to do is check which audio system version you have - you can find this in the setup menu (click on software update and it should list it at the top of the screen).

Once you have that number, go to this thread:


and follow the link to download the right software for your version (mine is the 17TDT2EU-DA31)

You'll end up with a ZIP folder. Click on it to de-compress it and you'll end up with a file which has a .kwi extension.

Right, you now need to get this into your car. And this is the bit which took me ages. The CHR USB connection is archaic. First thing, you need to format your USB memory stick into EX FAT or FAT 32 format, or else it won't recognise it. Worse still, it ONLY worked when I dug out an old 1GB memory card. It didn't like the 16GB or 32GB ones I tried. I suspect it doesn't like anything above 2GB. A real pain, but it is what it is.

Once you have found a low capacity card, pop the file on it and insert it into the CHR USB slot. Go to Setup on the menu, and scroll down to software update. It should recognise your USB stick, just follow the instructions from there, and it takes a matter of minutes to install the update.

Once it's installed, all the CarPlay bugs appear to have disappeared.

Hope this helps others out there having the same issues.

Nick
 
Discussion starter · #5 ·
yep, my strong suspicion is iOS 18 gave up and couldn't work with the old software. My understanding is that the 2021 update was not insignificant, and you'd expect software developers (in Toyota's case, Panasonic I think) to stay up to date with whatever Apple pushes out. It kind of makes sense therefore that at some point the old Firmware would stop interacting well with apple software. I hope this helps other too, like you say!
 
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