TSB: WPS9 – Re-Programming Thermal Management Control Unit - Feb 8, 2024

[Tooney]

Model Year: As of 2020 up to 2025
Model Line: Taycan (Y1A/Y1B/Y1C)

Concerns: Thermal management control unit (TME)

Cause: Optimized software is available for the thermal management (TME) control unit to increase the
robustness of the electric passenger compartment heater.

Actions:
• Re-program the thermal management (TME) control unit with the latest PIWIS Tester software
release.
• Minimum requirement: Release 42.500.000
https://static.nhtsa.gov/odi/tsbs/2024/MC-10251145-0001.pdf
Edit - added: https://static.nhtsa.gov/odi/tsbs/2024/MC-10251446-0001.pdf
Edit - added revised TSB: https://static.nhtsa.gov/odi/tsbs/2024/MC-10252437-0001.pdf

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[WasserGKuehlt]

Woohoo! They found a software fix to a hardware problem.
(ducks, runs)

 

[f1eng]

I had this as a recall yesterday and the day before.
Replacing the hardware was also on the work list.

 

[iamai]

my '21 Turbo S had this exact procedure done today 3/15/24 because i complained that i had to set the temp to 77 to feel any sort of warm air, which was unlike all the other EVs i owned in the past.
But when i asked if this procedure will affect the Heater Replacement Campaign, i was told that it is a separate thing and might still happen to me.

 

[anonymouse]

Woohoo! They found a software fix to a hardware problem.

what annoys me is that they don’t do anything by remote software update. Tesla find and fix issues every day and push those out as updates for the global fleet. Porsche instead tell us to drive an hour to the dealer, who says “We will need your car overnight in case the update fails”. It’s still 1980 in Porsche land.

 

[Scandinavian]

what annoys me is that they don’t do anything by remote software update. Tesla find and fix issues every day and push those out as updates for the global fleet. Porsche instead tell us to drive an hour to the dealer, who says “We will need your car overnight in case the update fails”. It’s still 1980 in Porsche land.

Agree, Porsche is completely lost in the Connected car space. Just now looking at a BMW I series and the functionality of the car and app, puts Porsche to shame. It’s not comparable at all.

No wonder there are so many Porsche Taycan being returned around here where I live. The car is not living Up to the promises. I have never had a car that needs to visit the service department as much as this Turbo. Not even my Aston has done 20% of the service visits and that includes yearly oil change. Always been ready in a day or two. Except when upgrading and tuning.

 

[WasserGKuehlt]

My car has been in once in 1 year/20k+ miles, for a recall. I asked if they could do it remotely, but they insisted that the car had to be present for the battery pressure test.

 

[f1eng]

I am lucky it seems.
The Taycan is the first car in 50 years I have owned that had anything on it other than the Sat Nav map that even could be updated.

 

[violuma]

what annoys me is that they don’t do anything by remote software update

If you read the service bulletin, there are big flashing warnings about how the control units can be bricked if the voltage deviates from a fairly strict range during reprogramming. I would expect that is why it needs to be done under controlled conditions.

I just had this campaign done while my AC charger was being replaced.

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