Nissan announcement: termination of NissanConnect services on older Leafs

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Eddie16

Active member
Joined
Aug 21, 2020
Messages
25
Nissan recently sent out an email to owners of older Leafs that use AT&T 3G to provide telematic services. AT&T is turning off 3G, thus cars like my 2016 will lose telematics by Feb 2022. The main thing I was interested in knowing was whether loss of telematics would cause clock drift, so I called Nissan but got the usual we're-nice-to-you-but-we-dont-have-an-answer routine.

I would have attached Nissan's announcement .eml file, if this forum allowed attachments.

Of course Nissan emailed me the usual after-call survey. My response to them is below. If anyone here knows whether clock synchronization will be a casualty of telematics termination, I would like to hear from you!
--------------------------------
These comments are regarding the 2016 Nissan Leaf I drive.

I am not exactly pleased that the car I drive, lost two battery
bars at about 35K miles. Because the maximum range of this vehicle
is now about 90 miles, the vehicle can no longer take me to some
of the places I need to go. It seems to be common knowledge on the
Leaf Forum that the 30kwh battery design loses bars quickly, even
in moderate climates. When I asked a local Nissan dealer what the
cost of replacing the battery pack with a more dependable 40kwh
pack would cost, I was quoted a price of $13500. That makes it
clear that I need to go to another car company for electric drive
that is cost-effective, reliable, and has good longevity.

My recent experience with trying to get information from Nissan,
regarding the announcement that AT&T 3G is going away and thus older
Leafs will lose telematic services, was frustrating. When I asked
your staff if the loss of telematics would mean the car's clock
would drift, because clock synchronization is done via telematics,
nobody had knowledge of how time-keeping is done in these cars.
That is, your staff had no knowledge of whether clock correction
is done via NTP over the telematics cell connection, is done
directly from the NIST atomic clock (as in some watches), or
some other way.

The owner's manual says nothing about whether owners can manually
set the clock in their car. This would be necessary if the loss
of telematics is going to cause clock drift. The dashboard time
display is important to me, because it is the safest way to know
time while driving.
 
I wouldn't be surprised if the clock signals come from GPS. Maybe someone here w/a Leaf w/a disconnected TCU or w/a non-working 2.xG unit can chime in.
 
cwerdna said:
I wouldn't be surprised if the clock signals come from GPS. Maybe someone here w/a Leaf w/a disconnected TCU or w/a non-working 2.xG unit can chime in.

I was able to confirm on my 2013 when 2G was shutdown, it would still get the clock time from GPS even with no 2G service. At least it was nice to know that always worked when you had to pull the 12V battery for any reason. :D
 
To answer the original question: the TCU has nothing to do with the clocks in the Leaf.
Even better: replace the existing TCU with an OVMS module.
I have started a dedicated thread on this topic at https://mynissanleaf.com/viewtopic.php?f=31&t=32715
 
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