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M2 Technical Topics > Navigation, iDrive, Audio, Video, Bluetooth, Phone, Cameras, Electronics > Nav/Telephony broken

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      05-11-2017, 08:27 AM   #1
Ghost of Akina
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Nav/Telephony broken

I tried searching the forums to see if anyone else had this on a recent BMW but couldn't find anything useful; apologies if I just can't search well.

For the last several days, my GPS won't get a position lock and defaults to the sea off the western coast of northern Africa. I punched in my manual GPS coordinates and it shifted the map there since the map data still works but it still couldn't follow me around or direct me. Over the same period, the built-in SOS telephony is broken as evidenced by the error lights on the dash. Finally, my bluetooth works for receiving sound (ie the speakers) but the mic won't work so callers can't hear me though I can hear them just fine.

My car (2017 M2 6MT) is stock aside from a BMS clutch stop. It isn't due for service for some time and I'm a fairly busy guy so I'd rather take a crack at this myself on a weekend if possible. Several restarts haven't fixed the issue but I wondered if anyone knows if this is something I can troubleshoot a bit myself. Could it be a loose relay/connection for the shark fin antenna or something of the sort? Any experience and ideas would be appreciated. Thanks all!
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      05-11-2017, 04:13 PM   #2
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Quote:
Originally Posted by Ghost of Akina View Post
I tried searching the forums to see if anyone else had this on a recent BMW but couldn't find anything useful; apologies if I just can't search well.

For the last several days, my GPS won't get a position lock and defaults to the sea off the western coast of northern Africa. I punched in my manual GPS coordinates and it shifted the map there since the map data still works but it still couldn't follow me around or direct me. Over the same period, the built-in SOS telephony is broken as evidenced by the error lights on the dash. Finally, my bluetooth works for receiving sound (ie the speakers) but the mic won't work so callers can't hear me though I can hear them just fine.

My car (2017 M2 6MT) is stock aside from a BMS clutch stop. It isn't due for service for some time and I'm a fairly busy guy so I'd rather take a crack at this myself on a weekend if possible. Several restarts haven't fixed the issue but I wondered if anyone knows if this is something I can troubleshoot a bit myself. Could it be a loose relay/connection for the shark fin antenna or something of the sort? Any experience and ideas would be appreciated. Thanks all!
I didn't have those exact issues, but similar ones (SOS inoperable, turn signals that were a little haywire, etc), and the problem turned out to be a defective com box. Seems like yours could be the same if those things all route through the box, which, surprisingly, the turn signals do. It was a known issue at the time (January), apparently there was a bad batch. If that's the case they'll have to replace it - there's no fixing them.
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      07-26-2017, 09:57 AM   #3
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Not to revive a dead thread but in case anyone has similar issues in the future and is looking for a cause and fix, it was indeed the TCB unit (telematics control) which has been replaced and everything works fine again.
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      07-27-2017, 11:24 PM   #4
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Major props for following up on your old thread though. Hate when people leave them hanging.

https://xkcd.com/979/
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      07-28-2017, 07:37 AM   #5
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Since this hardware is shared by other, much-higher production BMW models, makes sense to post questions like these in other model forums to improve likelihood of an answer. Having an M2-specific nav/radio forum would seem to limit opportunity to get and share relevant info about iDrive, coding, amps, speakers, you name it.
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      12-13-2017, 10:25 PM   #6
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having Exact issue...this is great. u happen to know where the telecom box is located? i ound one for half price on ebay...
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      12-14-2017, 12:32 PM   #7
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Quote:
Originally Posted by DKM2Power View Post
having Exact issue...this is great. u happen to know where the telecom box is located? i ound one for half price on ebay...
wouldn't something like this be covered under warranty? Or because you have been coding BMW won't cover this?
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      12-17-2017, 10:08 PM   #8
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Quote:
Originally Posted by LSB --> LBB View Post
wouldn't something like this be covered under warranty? Or because you have been coding BMW won't cover this?
My cars fbo, has a hidden tamper code, suspesion etc. Its having major drivetrain issues and no gps...my sm has done tens o thousands to my modded m3 and now the m2 but bmw is gwtting strict and bc the electrical system is stock they wont diagnose it...

his fix makes sense bc that box sits under a 12" sub w 3000watts lol could have easily rattled something loose...

Good news he wont flag me
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      01-13-2018, 01:26 AM   #9
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Fixed...The TCB was fried and its fuse in the rear fuse panel (next to TCB) was burnt out...Probably as a result of a methanol spill that occured directly above the tcb...
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      04-15-2023, 10:21 AM   #10
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Sorry to revive old thread but im having same issue, seems like general consensus is new battery. Is the telcom control unit in trunk or headliner?
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      04-16-2023, 11:24 AM   #11
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Quote:
Originally Posted by DKX4///M View Post
Fixed...The TCB was fried and its fuse in the rear fuse panel (next to TCB) was burnt out...Probably as a result of a methanol spill that occured directly above the tcb...
Do you know what fuse it is? And is the combox the one in trunk ir in headliner?
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