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2017 Model X (1 week old car) died while driving

pawanvaswani_98121795pawanvaswani_98121795
edited November -1 in Model X
I bought Model X on 13th April 2017. Today I was driving the car as usual and I got a sudden warnings on the dashboard "Car can shutdown any time", "Air suspension not working properly", "Power of the car is reduced", "Call Tesla Roadside Assistance". Speed of the car came down to 10 miles an hr and eventually it died on me. I called Roadside assistance, they sent a tow truck to pick up my car. This has been a very disappointing experience! Has anyone faced this kind of an issue? I am wondering what it could be? Is it common for Tesla owners to see their car failing on them?
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Comments

  • dortordortor
    edited April 2017
    only Model X owners.
  • teslaramateslarama
    edited April 2017
    never heard of it...hopefully SC will figure it out quick.
  • pawanvaswani_98121795pawanvaswani_98121795
    edited November -1
    My driving speed was 30 - 50 miles/hr, Battery of the car was showing 140miles, not sure what caused this issue?
  • john.smith192021_98122396john.smith192021_98122396
    edited April 2017
    That happened with my 75D after two weeks, they told me it was a 12V battery issue.
  • Maximus-XMaximus-X
    edited November -1
    Taking delivery of my MX on Wednesday, fingers crossed. But I think this is a rare event.
  • nnick01nnick01
    edited April 2017
    Sounds like the small 12v battery failed (its like a regular car battery). SC should fix it right up hopefully.
  • pawanvaswani_98121795pawanvaswani_98121795
    edited November -1
    What!! Despite of a bed full of battery, it still has that 12 v battery? That's a news to me. Where is the 12v battery located in the car? I couldn't see it in truck or Frunk.

    On the errors dash board, when I got stream of errors one of them was about 12V battery that I totally ignored simply because other errors were pretty scary. I hope the issue is as trivial as bad 12v battery.

    I will let you guys know when I hear back from service center.
  • Leli001Leli001
    edited November -1
    In the frunk, there is a cover near the base of the windshield that needs to be removed. The 12V battery is between the center of the car and the drivers side. Although similar in size to most car batteries (a little smaller), it is of the deep discharge type, the kind used in the telecom industry.

    That battery is used for the electronics/computers and also used to energize the contactors inside the main traction battery pack. Once energized, the battery pack power is then available for the motors and A/C or heating.

    This is mainly a safety feature as it is a means of disconnect of the main battery pack. It is silly to say but it can be thought of as a 'starter' battery for the main battery pack.

    Your problem could be a bad 12V battery (it happens) or a DC-DC converter that is going bad.
  • JAnnenJAnnen
    edited November -1
    Leli001: Good description. Thanks.

    The dash screen goes crazy with wild error messages.

    Could be a connector issues. The Model S had several grounding issue threads on a similar issue:

    https://forums.tesla.com/forum/forums/loose-ground-stud
    https://forums.tesla.com/forum/forums/grounding-issue-solved-private
    https://imgur.com/8CJkYro?r

    pawanvaswani: Sorry for trouble. Whatever the issue, Tesla will jump to fix this.
  • pawanvaswani_98121795pawanvaswani_98121795
    edited November -1
    @Leli001 - What an outstanding description. Thanks a lot for explaining this.

    Now that I understand the usage of 12v battery, I tend to agree that my issue was related to 12v battery. Last week it happened twice when I got in the car the screen didn't come up for almost 10-15 seconds. One time I got a message, please wait car is performing start up checks (or something like that). It could be because of bad 12v battery or some connector that keeps it charged. I hope the service center will resolve this issue.
  • Silver2KSilver2K
    edited November -1
    If that batteries dies and your pack is full, you still will not be able to drive the car or even get into it.
  • Silver2KSilver2K
    edited November -1
    Battery
  • VawlkusVawlkus
    edited April 2017
    it does sound like the 12v would cause this, and Tesla has had a couple of bad batches of 12v batteries trip them up (they've changed suppliers twice that I know of).
  • poloXpoloX
    edited April 2017
    The messages do not seem to relate to the 12V battery. Just curious on why folks say it is? Suspension? Car Power is reduced...? How do these have anything to do with the 12V batt?
  • VawlkusVawlkus
    edited April 2017
    it matches error messages that occurred when the initial Model S had a batch of bad 12v batteries.
  • pawanvaswani_98121795pawanvaswani_98121795
    edited April 2017
    @poloX: there was a message about 12v battery but I didn't pay attention because all other messages were pretty scary.
  • pawanvaswani_98121795pawanvaswani_98121795
    edited April 2017
    @Vawlkus: Thanks for confirming. I really hope problem is as trivial as 12v battery.
  • UnknownUnknown
    edited April 2017
    12V battery was an issue early on for Model S but I rarely hear that anymore. My understanding is it got a (more) sophisticated monitoring algorithm now that could monitor the battery condition so it will know long before battery needs to be replaced. ICE cars could nave battery problems too, some cars like BMW are known to have batteries lasting no more than a year although the first symptom you got is not able to start the car.
  • VawlkusVawlkus
    edited November -1
    carlk: that was part of the issue. The other part was a bad batch of batteries that eventually caused Tesla to switch suppliers over, since the failure rate was far in excess of anything reasonable.
  • UnknownUnknown
    edited November -1
    Vawlkus Yes Tesla did both which made happenings like these very rare nowadays.
  • Leli001Leli001
    edited April 2017
    @poloX, a faulty 12V battery, DC-DC converter, and/or bad grounding can cause random intermittent error messages that vary with the components involved. The computers and controllers, although resilient, are very sensitive to power fluctuations which can cause operating problems to manifest within the network. These problems can exceed the fault tolerance of some systems causing the errors to show on the display.

    Digital electronics either work or they don't so voltage drop is a big concern when sizing cabling for DC power applications.

    The car knew it had a problem but the voltage must have dropped or was varying so quickly that it caused so many other error messages to come in at the same time so it would seem all the different errors were not related.
  • Model - XModel - X
    edited November -1
    So what was the issue?
  • Solarman004Solarman004
    edited April 2017
    @pawanvaswani, any diagnosis yet?
  • pawanvaswani_98121795pawanvaswani_98121795
    edited April 2017
    Guys, my car is back :)

    The issue was bad connection between high voltage cable and the junction box. As per Tesla service center this is one of the rarest of the rare situation. Bad cable connection has caused some damage to the junction box. To fix this issue SC changed all high voltage cables, regular cables and the junction box. Basically they have changed junction box and every cable that goes in and out of the junction box.

    I am very happy to get my car but to be honest my confidence on the car regarding its reliability has gone down by several notches.
  • BighornBighorn
    edited April 2017
    Invariably it was going to be a bad harness or connection--now that it's remedied you should be good to go. It shouldn't really sour you on reliability, though you will have to absorb that going forward as your faith is restored. It is to be expected in the manufacture of complex systems--
    http://www.weibull.com/hotwire/issue21/hottopics21.htm
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