MY2020 - LTE Failure - update

[TomP]

I lost LTE connection last month.
It worked "OK" for the last 15 months.
But there were times I would lose connection.

The dealer ordered a new LTE module from Porsche which was due in about one week. Tracking showed the part was stuck in US Customs for another week. The dealer then ordered another one since the replacement part from Porsche is MIA and never arrived.

The new module arrived this week.
It’s a different part number than the OE module.
That seems good since maybe there has been an improvement to connectivity.

Bad news – the same day the module arrived Porsche messaged the dealer and said – Do NOT install this part.

No reason given.

Today Porsche messaged back that a software update is forthcoming, supposedly next week.
Hopefully know more next week...

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[Pjjameso]

I lost LTE connection last month.
It worked "OK" for the last 15 months.
But there were times I would lose connection.

The dealer ordered a new LTE module from Porsche which was due in about one week. Tracking showed the part was stuck in US Customs for another week. The dealer then ordered another one since the replacement part from Porsche is MIA and never arrived.

The new module arrived this week.
It’s a different part number than the OE module.
That seems good since maybe there has been an improvement to connectivity.

Bad news – the same day the module arrived Porsche messaged the dealer and said – Do NOT install this part.

No reason given.

Today Porsche messaged back that a software update is forthcoming, supposedly next week.
Hopefully know more next week...

I hope there is a software update as my LTE just drops the signal randomly. Have Verizon phone which never drops at signal when the Taycan does. Hope this is an over the air and not a dealership update.
Please let us know when/if you hear any details regarding the update, mines a MY 20.

 

[TomP]

A new External Communication Control Unit has been installed along with update WMH0 and the LTE is back up and running.

The dealer did initially try the 12v Battery reset in an effort to "wake up" the module, it did not.

No settings were lost other than having to pair the phones with the new module.

When using the Connect App I have noticed that there is no lag updating the vehicle data and vehicle location.

Also the AMC-1 update was installed while in the shop, no issues.

 

[Pjjameso]

A new External Communication Control Unit has been installed along with update WMH0 and the LTE is back up and running.

The dealer did initially try the 12v Battery reset in an effort to "wake up" the module, it did not.

No settings were lost other than having to pair the phones with the new module.

When using the Connect App I have noticed that there is no lag updating the vehicle data and vehicle location.

Also the AMC-1 update was installed while in the shop, no issues.

What is WMH0 update? So I assume the software update did not fix the LTE dropouts. How did you convince the dealer to replace the comm unit. Think it’s going to be a fight on my end as it’s so intermittent.

 

[TomP]

What is WMH0 update? So I assume the software update did not fix the LTE dropouts. How did you convince the dealer to replace the comm unit. Think it’s going to be a fight on my end as it’s so intermittent.

Mine totally stopped communicating for weeks.

from work order:

control unit for external communications faulty confirmed customer complaint, radio, bluetooth, navigation and other functions are inoperative. perform pre-VAL, and find fault code U164200 - Connect control unit - no communication. performed 12v battery reset in an attempt to "wake up" control unit. status did not change. determined control unit to be faulty due to a factory defect. removed and replaced control unit for external communications according to the workshop manual.

Porsche also requested the software update with the module replacement.
The WMH0 update description is attached.

hope that helps.

 

[CATaycan21]

Just to clarify, did you completely and consistently lose LTE connectivity prior to the repair? Or was LTE indicated but not data connectivity?
thanks for the information.

 

[TomP]

Just to clarify, did you completely and consistently lose LTE connectivity prior to the repair? Or was LTE indicated but not data connectivity?
thanks for the information.

Yes complete and consistent loss of LTE connection.
The LTE connection icon was also gone.

 

[CATaycan21]

I have now experienced what you experienced on our '21 RWD.
The dealer is being instructed to replace the OTA control unit (which hopefully will resolve the issue)
The car has been at the shop for over 2 weeks.

See my thread here:
https://www.taycanforum.com/forum/t...ata-related-services.15421/page-2#post-239148

 

[TomP]

A new OTA unit should solve your connection issues.
Mine has been working well since the replacement a few years ago.

 

[Irv09]

I just lost my LTE for the second time. The 12V reset worked the first time.

 

[TomP]

I shouldn't have commented it was working well, because now its not.
No LTE for a week, its going to the dealer this weekend.

 

[Irv09]

Man, I am sorry. This is so frustrating to see after having the module replaced.

 

[franksc]

I shouldn't have commented it was working well, because now its not.
No LTE for a week, its going to the dealer this weekend.

Second time for me as well. Out since May 3. Last time Porsche support responded to me and had me send pictures and got resolved. No response this time to 2 emails.

 

[TomP]

Interesting, mine went out May 4.
What was Porsche Support able to do remotely that got you connected the last time?

 

[Irv09]

I did not get any real help from Porsche Support and I had to take it in for the 12V battery disconnect and shut down. My LTE went out on May 5th.

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