[Trollz3457]

After having this car for two years, I began having an issue I believe with the touchscreen. Its like a ghost is touching my screen all the time It happens while driving and it starts clicking random things. I ran a diagnostic test by following the steps below:
So turn your car on.
On the commander (once the mazdaconnect loads) hold the music note, star, and mute/volume buttons down for a few seconds.
A test screen appears.
Turn the commander clockwise to put a 4 on the screen.
Press the commander knob down and release.
You should see a code list come up.
If your screen is failing you’ll have a code B108E:04 for center display internal failure, this indicates you need a new display screen.

I currently have the display failure notification. I am out of warranty. Due to it expiring in December 2019. The dealer told me they would charge me diagnostic fee to check it out. Theres a recall for this for Mazda3 2014-2016. What can I do?

The reason there is a recall for the Mazda3's and not the 6's is because the 3 had the new infotainment system first and the 6 used the older tomtom system up until 2016. The reason the dealer wants to diagnose it is to 100% confirm that it is that specific issue and not something else causing it to fail. If you already have updated the system to 70.00.367 and are still having these issues you're pretty much definitely gonna have to have the screen replaced or repaired. I'm not sure but i believe they started sending out actual repair kits for the screens but I may be wrong about that. If you don't want to pay for a diag you're best bet is just paying to have the screen replaced with a new one. The screen and the actual cmu are separate pieces so just make sure you just ask for the screen so you don't get jipped.

 

[Trollz3457]

I have not. I am waiting to get an oil change to ask them to update my system. I am around like version 59 I believe so maybe its that.

That could definitely be the issue, the newest update has fixed a ton of the issues we've been seeing with the infotainment systems so hopefully that's all you'll need.

 

[Trollz3457]

even with hardware fault codes? the firmware updates are helping?

I can’t confirm but I have had multiple repair orders where the customer complaint is a touch screen jumping issue (ghost touch) and blank screen complaints or constant rebooting complaints and all those repairs need to start with the software update. Most of the time the software is multiple versions behind the newest and therefore I start with the update. It’s what mazda says to do on MGSS and it makes the most sense. I haven’t had any of those vehicles come back for the same issues.

 

[Trollz3457]

mine is confirmed as a hardware failure. dealership wants $1200 to replace, out of warranty since April despite me reporting problem in December. but they didn't have a hardware code at that point. they said my complaint then was phone disconnecting not ghost touching. We have appealed to mazda corporate. if this doesn't work, can i still disable the touchscreen by pulling the ribbon cable like was possible in the older mazdas?. currently in a 2017 cx-5 GT. if so, is it the same process?

I’m not quite sure as I believe the touchscreen and cmu are connected with the same connector so taking out one of the connectors may disable the entire system or make even more problems. Unfortunately the screen itself is ridiculously expensive at like $900 or something crazy but honestly a skilled tech can change one out in about half an hour. If you’re somewhat mechanically jnclined all you’d really need is a Phillips head screwdriver a 10mm socket on an extension and a ratchet. You can pop off a majority of the dashboard pieces quite easily.

 

[Trollz3457]

I'm quite sure I can swap the screen. I took the whole unit out to install the carplay USB adapter and do that upgrade . it's not a big deal at all.

I know that in previous versions there was a digitizer ribbon cable and also a second cable for the lcd display. ~2014 Era you could simply remove the digitizer cable and disable the touch screen without all the random touch codes still being sent.

if have to take the unit out and see but was hoping someone had either done it this way or taken one out recently enough or had one on a workbench etc that could verify.

yes cheapest I can find the unit new is ~$750 from one of the online Mazda parts warehouses. average full retail is $1200.

Any tweak to disable touch screen all togather on 2014...

I have issue with touch screen pressing buttons by itself on low speed or idle. Not happening when car is moving at speed and LCD is disabled. Can anyone come up with tweak to disable touch function of the screen all togather (even at idle). I will appreciate. :crying2:

www.mazda3revolution.com

Yea you can definitely just change the screen without changing the cmu. i think it's only held on by 2 or 4 small screw/bolts. I just double checked with my foreman and the mazda sites wiring diagram and I was correct in saying you cannot just unplug the touch ability. They are all run through a common connector.

 

[Trollz3457]

My software update seemed to work for about a week then the stations started jumping again and right before i take it in today actually the ghost touches went crazy but when I took out my phone to record them they stopped for the entire time I was waiting to deposit a check at the bank.

Do you have a nav sd card installed? There was a bad batch of sd cards at some pint that were causing issues.

 

[Trollz3457]

How long does it take for the nav sd cards to corrupt the system BTW? had the car nearly 3 years and all of a sudden problems right before warranty ends

Honestly the sd card issues were really random, we’ve still got cars out there with them and they don’t exhibit any issues at all. And then you get some that the second you put the cards in it starts messing with the system. When you go to the dealer have them check tsb 09-015/20. It’s the service bulletin that covers the sd card issues. Or you can double check your own sd card and you’ll know it’s the issue. If the small number on the backside of the sd ends in any of these 6 digits, it’s a corrupted SD card:
50424D
50428G
50631D
50632G
50635G
50877D
50881G
50913D
50955G
50995G

 

[Trollz3457]

Thanks for posting these details. No issues with the infotainement or nav. systems so far but I just verified my SD card, ends in 50424D, the front side shows BHP1 66 EZ 1 E, 2566624 Rev 05. I have a 2017 GT with MTX, is it preferable that I not re-install it and order a new card at the latest revision ?

honestly that’s gonna be a personal decision, if your system seems to be working fine with it in you could leave it in and just order a new one or wait until you have issues. Or if you don’t really use the nav you could just leave it out. It’s possible you may never have any issues either so it’s really up to you and whether you want to spend that money.

 

[Trollz3457]

Thanks, thinking it maybe a good idea to update the card with the latest version for about 60$, Ebay offers show BHP1 66 EZ 1 N as the latest revision, there are also other listings under different call letters (BHR, BJM), guess I should stick with the BHP one, correct ?
Thanks !

I'm not really sure on the call letters or which one you should buy as I don't have nav in my car and I'm not sure if those are for different models or they could be for the different systems as well (tomtom, mazda connect gen1, mazda connect gen2).

 

[Trollz3457]

Hi, I have a 2016 Mazda CX-5 and the infotainment system has been rebooting for about a 2.5 months now. Twice it briefly came back. The dealer told me a need a new CMU and I'm about to have this replace for $1,200. But I saw your post and i'm wondering if there is a way to update the software if I cannot get to the menu? I had a nav SD card, but it is gone now! I didn't realize until today because the whole infotainment center Including the Nav system has been out of commission for the last couple of months, but I just checked to see if the SD card was one of the bad batch you were talking about and... there's no SD card there. The warranty is up and I really don't want to spend $1200 on a 5 year old car. Please any advice?

Depending on how long the sd card was in the system and if it was able to corrupt the cmu it very well may have to be replaced. Once the cmu has certain codes set or if it’s corrupted there’s no way to repair it which sucks, you could try and email Mazda corporate and see if they’ll help you out with paying for as it is a known issue.