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ravilach Author

Level 1

34 points

CarPlay Disconnecting - iPhone XS Max

Dear all wise and all knowing Apple Community 🙂

I recently switched from my iPhone 7+ running iOS 12.0 to an iPhone XS Max running iOS 12.0.

I have a 2018 Audi S4 with the latest firmware from Audi.

With the switch to the XS Max, seems that my Apple CarPlay will get into a cycle of disconnecting and reconnecting

every 30 seconds or so.

I tried reverting back to my 7+ and works fine.

1. Siri is enabled.

2. The USB Lockout is turned off on the XS Max. The 7+ had the lockout turned on

but made no difference in the XS Max toggling on or off.

3. Swapped the cables to the one in the box of the iPhone XS Max and USB ports

in the car. This had no impact on the XS Max recycling the connection. The 7+ is uneffected

business as usual.

Not sure if this is tied in with the authentication issue with the charger. I go over wired carplay and the 30

second increment is suspect as that is my lockout time on the phone.

Curious if others are facing this.

Thanks!

-ravilach

iPhone XS Max, iOS 12

Posted on Oct 2, 2018 11:50 AM

270 replies

wilcon2

Level 1

14 points

Oct 21, 2018 7:55 AM in response to SpEe521

It sounds drastic but I’ve just bought a usb hub on Amazon with power delivery, along with a 10w usb cigarette adapter, I’m going to plug the usb hub into the car’s USB port, then wire the cigarette usb to the usb hub to provide extra power, then plug the iPhone into the usb hub. No idea if it’ll work but I’ll post when I find out 😆

cselland

Level 1

4 points

Oct 21, 2018 8:29 AM in response to ravilach

Yup just chiming in exact same problem. Seems to be an Audi issue obviously - I have a 2018 A5 coupe. My XS Max disconnects maybe 3-4 times in the first 5 minutes I'm driving, and then seems to settle down. Hopefully 12.1 fixes the issue because it's extremely annoying.

SpEe521

Level 1

18 points

Oct 21, 2018 10:53 AM in response to wilcon2

Very interesting! Can't wait to hear if that works...and if it does, then what does Audi need to do to fix this? Or is it Apple??? VERY CONFUSING AND FRUSTRATING ON THAT END!

Fingers crossed that you found the problem...

sapper17

Level 1

11 points

Oct 21, 2018 11:17 AM in response to LisaMcMom

Tested 100% battery this morning, no disconnect. Got out of car maybe ran the battery down to 98%, got back in car, phone disconnected, but noticed as soon it was at 100% the phone stayed connected again. iPhone Xs in Audi S5 Sportback

SpEe521

Level 1

18 points

Oct 21, 2018 11:24 AM in response to sapper17

"Tested 100% battery this morning, no disconnect. Got out of car maybe ran the battery down to 98%, got back in car, phone disconnected, but noticed as soon it was at 100% the phone stayed connected again. iPhone Xs in Audi S5 Sportback"

INTERSTING! Well, that's progress I guess... wonder if it is the amount of power the phone is trying to pull from the USB port... Apple should be able to fix this via an update I would think...

wilcon2

Level 1

14 points

Oct 21, 2018 3:59 PM in response to ravilach

Guys, Its happening with my mains charger as well !...its stopping then starting charging, its happening every 10-15 minutes or so. Can anyone else check if it's happening with them? This is definitely not just an Audi problem.

Oct 22, 2018 7:26 AM in response to ravilach

Add me to the list of people experiencing this. I have a 2018 Audi S5 Sportback. I upgraded my iPhone XS Max to iOS 12.0.1 and that seemed to solved the disconnecting issues and freezing for a while but the problems have returned.

mkuflik

Level 1

4 points

Oct 22, 2018 11:11 AM in response to wilcon2

Very good finding
I have tested my iphone XS with 100% battery and Carplay has not been disconnected (using Waze, Spotify, phone). 2018 Audi A5 Sportback.
In my wife's car, 2018 VW Tiguan, disconnections also occur when the iphone XS battery is not fully charged.

I hope Apple can solve the problem.

ravilach Author

Level 1

34 points

Oct 22, 2018 11:42 AM in response to mkuflik

Forgot which thread this was on but a poster stated that could be the phone trying to draw too much power. Not sure the best way to test this if in-between a fast charge(able) amount and not. Could be the USB component that VW choose trying to cut too much power from flowing.

0.5 amps vs 2.4 amps when in the 2.4 causes some flaw?

When I swapped out both lighting cables and changed ports, my cable was always a little warmer than I would have liked.

Solid problem solving skills on these threads, thanks to the community coming together on this!

-ravilach(OP)

jayshep

Level 1

19 points

Oct 22, 2018 7:24 PM in response to ravilach

OK. I tested it for two twenty-minute drives starting with the battery at 100%. No disconnections. The hypothesis that it's a power-management issue seems valid. Now we all need to bring it to Apple's attention.

(IPhone XS Max, 2018 Audi A5 Sportback)

Oct 22, 2018 11:07 PM in response to ravilach

I have an alpine ilx107 which I connect to via wifi with the xs max

I have a 50-50 rate of connection. With the 7plus nu errors ever same radio.

I was going to try wired but looks like many people have trouble with that.

I hope apple can fix this because I feel like I downgraded from 7plus.

Oct 25, 2018 4:29 PM in response to ravilach

I have this same problem as well. But mine seems to do it more Bluetooth than anything. Streaming media is fine. But phones calls are the worst. Every few seconds or so keeps going to privacy mode and then shows phone disconnected and then it reconnects. Seems to be an Apple problem as I drive a Ford F150

wilcon2

Level 1

14 points

Oct 26, 2018 7:01 AM in response to ravilach

Temporary solution: I purchased a usb power meter from Amazon for £7 to see what happens to the wattage as the phone disconnects. It turns out that the iPhone does not disconnect when connected via this intermediary device. It’s called Muker 10VA USB Multi-Meter.

sapper17

Level 1

11 points

Oct 30, 2018 8:31 AM in response to ravilach

Just spent forever on Support with Apple. They will take no responsibility for the disconnection through Carplay. I asked for a new iphone X, as I had no problems with it. Lesson learned. DO NOT UPGRADE IPHONE until proof it works with Carplay

SpEe521

Level 1

18 points

Nov 1, 2018 3:51 AM in response to Marksman338

I think I can confirm on my end, for 3 days now I’ve been using a usb voltage meter and no disconnects. If I remove the meter and plug straight in, it disconnects. It must be some kind of power management issue. 12.1 did not address this either. For those having the same issue, I got a $5 usb voltage meter off of Amazon (Prime shipping too) and that should be a good temp fix to alleviate some frustration until Apple finally addresses this issue.

CarPlay Disconnecting - iPhone XS Max