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MCU Slow Boot and Car Unresponsive via App

Discussion in 'Model X: User Interface' started by boelkers, Apr 18, 2018.

  1. boelkers

    boelkers Member

    Joined:
    May 30, 2017
    Messages:
    131
    Location:
    Minnesota
    I've had this issue happen twice now. First time I thought it was perhaps a fluke. 2nd time not so much. Heres the story.
    I parked my MX in the garage like normal and plugged it in for the night. Charging is supposed to start at 12:00am. Woke up the next morning to turn on the heater about 15 mins before I leave the house. I tried accessing my car via the App, the app connected to the car but shows no battery and ---%. See Attached screenshot. The car is also in an unlocked state. Turn on heater and see the air flow arrows but no temp or color changes showing that the heat was on.

    I go out to my MX and unplug the car and get in. Heat did not turn on and the MCU is off and not turning on. Try the reset but that does not work. Try it again, still no go. Wait in car 5 mins and the screen finally turns on by itself. Look at charge level and see that the car did not charge at all last night. Put in bug report after boot so if a technician worked on it they would see the timestamped area in the logs.
    This happened a second time about 5 days later. After this happened for the second time I called Tesla to see what was going on.

    Speaking with a tech, he connected to my car and saw that the firmware was good and saw no issues in the logs. But then asked what both my trip meter mileage was. Well Trip A had 16K and Trip B had 18K. Trip B for me is the "Lifetime" miles I've personally driven the car since. My MX was a demo vehicle and had 2K miles on it already so the odometer isn't exact for my personal usage. The tech stated that those are really high numbers explained that when the logs get full the car deletes old records, but it cannot delete everything it needs to if the trip meters are not also being reset on a regular basis. He said I was essentially filling my logs and the car was unable to delete certain data.

    I don't know how accurate his statements were but I reset them anyway. So far I've not had the issue again but I'll be calling back if it does. If this does resolve my issue in the long term then I hope this info can help someone else if they experience the same issue.
     

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  2. FTNguyen

    FTNguyen Member

    Joined:
    Aug 31, 2016
    Messages:
    8
    Location:
    Denver, CO
    I had a 40K lifetime trip, MCU was rebooting almost daily and door screen took 5-6 seconds to respond after putting car in park. Took it to serivce center they suggested resetting that trip and it seemed to fix all my issues. It's been almost 2 weeks and haven't had an had a reboot since.

    I was also skeptical of this 'Fix' at first.
     
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  3. AdamHLG

    AdamHLG Member

    Joined:
    Sep 29, 2017
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    326
    Location:
    Baltimore, Maryland
    I may be having this issue now. I'll need to try this as well.
     
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  4. boelkers

    boelkers Member

    Joined:
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    131
    Location:
    Minnesota
    After the reset for me the issue has not resurfaced. I think its a really stupid "fix" but what can you do?
     
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  5. AdamHLG

    AdamHLG Member

    Joined:
    Sep 29, 2017
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    326
    Location:
    Baltimore, Maryland
    So my car is getting a Modesta coating at a shop 90 minutes away from me. Dropped it off earlier this week and I pick it up tomorrow. Last night I was playing on my computer waiting for my wife and decided to check Teslafi and see the sleep cycle and charge on the car. To my surprise I received some sort of error where the data should be on the Teslafi page and was like 'wtf'. So I launched the app and saw the empty battery and the ---% and was like "HOLY %$$#" and thought my battery must be dead. It was after hours of course so the shop was not open. I sent a frantic email and he responded that he thought everything was OK but the MCU was very slow to start. He indicated he had seen it before and would try a reset on the car this morning (not the 'trip reset' but I guess a MCU reset).

    Then I found this thread and felt MUCH better overnight. So kudos to the OP (wait - that is you that just posted OP lolol) because he posted the exact issue and I assumed my battery was not actually dead! This morning I checked the app and my baby was alive again with 176 miles of range. And...... exhale!!!!!

    I don't know which reset he tried but he emailed me and said the reset worked. We will see if it holds. If not I will reset the Trip counters because, I too use one of those to measure my "date of delivery" data. But I only have 6,000 miles so far.
     
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  6. boelkers

    boelkers Member

    Joined:
    May 30, 2017
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    Location:
    Minnesota
    Glad my thread was help to you. I also had a similar panic attack when it happened. Glad to hear your car is OK. :)
     
  7. Logger

    Logger Member

    Joined:
    May 11, 2017
    Messages:
    61
    Location:
    American Southeast
    I had something similar happen twice. Once in October, the MCU shut down after charging had started and basically did not stop charging at the set level so instead of 80% I had a 95% battery when I woke up and manually stopped it. Most recently, this morning, the MCU went down before charging started so this morning I had only 80 miles on the battery. I took the car in back in December and they reset the trip meters. I thought this was a very interesting thing but okay they said it would need to be done, but my question is how often? I only have around 4000 miles on the trip meters now. Is this something I should do every month? If so I think there needs to be some updates being made to resolve it. Just my opinion.
     
  8. boelkers

    boelkers Member

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    May 30, 2017
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    131
    Location:
    Minnesota
    Agreed. Seems a bit like a design flaw to me.
     
  9. Joelhc

    Joelhc Member

    Joined:
    Oct 10, 2018
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    34
    Location:
    Los Angeles, CA
    I also have this issue with the car waking up via the app and used to have the problem with the car being asleep and having to wait for it to wake up when entering. The latter seems to be less common now though. I don't seem to have any power saving options that other people talk about like "always connected". Maybe that was removed in the recent updates, I've only had the car for 6 weeks.
     
  10. jboy210

    jboy210 Supporting Member

    Joined:
    Dec 2, 2016
    Messages:
    3,718
    Location:
    Northern California
    From what I understand, some setting were removed as part of the MCU2 upgrade found in cars manufactured after mid-March 2018.
     
  11. Joelhc

    Joelhc Member

    Joined:
    Oct 10, 2018
    Messages:
    34
    Location:
    Los Angeles, CA
    Ah, got it. Thanks for the insight @jboy210
     

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