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Unplug charging cable while car in sleepmode

Discussion in 'Model 3: Battery & Charging' started by paulvinh, Sep 18, 2018.

  1. paulvinh

    paulvinh Member

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    When the car finish charging overnight and is still in sleep mode. I have to open the door to wake up the car to be able to unplugg the charging cable. Is there a better way to do this?
     
  2. swaltner

    swaltner Active Member

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    No. They do it this way so that a random stranger isn’t able to disconnect and walk off with your mobile connector or J1772 adapter when charging in public.

    I walk past the charge port with the car backed into the garage, pop the driver’s door open and let it sit open an inch or so, go back to the charge port, push the button on the J1772 charge cable, remove the cable and adapterfrom the port, hang up the cable, get in the car and drive, letting the charge port door close automatically.

    You could use the app to unlock the charge port to avoid opening the door first. I don’t bother doing that because it seems to take 30 seconds to get the app to wake the car and only a couple seconds to walk from the driver’s door back to the charge port. I unlock the port from the app if i’m approaching the car at a public charging station at night, but I think it’s too much of a hassle otherwise.
     
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  3. brandonee916

    brandonee916 Member

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    So I've been struggling with this as well.... here's how I figured out how to get it to work. Walk up (phone on you)... press and hold the thumb button, until the T turns white, let go so it reclamps the adapter, then pull off. I couldn't get the "unlock" to work reliably without using these steps.
     
  4. Need

    Need Active Member

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    I think it should unlock if you push the button on the charge handle? I think I get it to work a few times but my phone doesn't always open the door either.
     
  5. Eno Deb

    Eno Deb Active Member

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    As far as I can tell the car cannot detect the button on the charge handle if it's in sleep mode. If you wake it up first (e.g. by opening the app on your phone) the button works.
     
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  6. Kirby64

    Kirby64 Member

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    If you need to add anything to the trunk, I've found opening the trunk wakes up the car properly and you can disconnect the charger after that.

    My morning routine is just that: Open trunk, toss bag in, unplug charger/hang up, close trunk.

    No need to open the car door before I'm ready to go in.
     
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  7. Need

    Need Active Member

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    How long do you have to hold the button? I will try it tomorrow morning. Although if it is too long, I might as well open the front door first.
     
  8. jsmay311

    jsmay311 Member

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    #8 jsmay311, Sep 18, 2018
    Last edited: Sep 18, 2018
    This is a bug, straight up. But I don't think Tesla has any line-of-sight to fixing it, so it seems they won't admit that it's a bug, even though the manual clearly describes (on page 113, shown below) that the car is supposed to release the charge connector upon pressing the button on the connector if a phone key is present.

    upload_2018-9-18_14-43-55.png

    That's not right. This behavior only occurs when the car is asleep. If this behavior was intentional and intended as a security feature, it would work this way all of the time, even when the car is awake. But it doesn't.

    Plus, it requires the phone key to be present. So there's no theft-deterrence.

    Or you could just open the app and allow it to connect and "wake up" the car. You don't have to send any commands through the app. Once the car is "awake", when you press the button on the connector it will recognize a nearby phone key and release the connector.
     
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  9. Eno Deb

    Eno Deb Active Member

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    I suspect this is actually a hardware limitation that prevents the car form detecting the button in sleep mode. Remember that the car was originally supposed to unlock (and thus wake up) automatically when an authenticated phone approached. The current method (only actually unlocking when you use the door handles) was introduced in a firmware update later. Perhaps the charger module that handles the communication with the EVSE needs to be awake to detect button presses.
     
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  10. Need

    Need Active Member

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    Good theory! It makes sense.
     
  11. brandonee916

    brandonee916 Member

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    Just press it until you see the Tesla "T" light up white :) It's very easy... I can't get the charge port to unlock using the option in the UI... so this method works 100% of the time for me.
     
  12. ibdb

    ibdb Any excuse for a road trip

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    I understand the charge port locking if the car is asleep and the car is locked. My car is not locked in my garage but when the car is asleep, the charge port is. I think that's a bug.
     
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  13. jsmay311

    jsmay311 Member

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    In my experience, holding the button down doesn't make any difference. I've held it down for 10+ seconds before to no effect.

    If the car is asleep, it won't recognize the button press no matter how long you hold down the button.
     
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  14. brandonee916

    brandonee916 Member

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    My car has no problem waking up when I press the thumb button... I have an iPhone though, I've read lots of issues with Android folks at the phone key
     
  15. jsmay311

    jsmay311 Member

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    iPhone here too.

    Trying to think of any explanations for the difference...

    -I see you've only had it for 9 days. Do you have enough data points to assess "normal" behavior?
    -What firmware version are you on?
    -Do you open the app within 30 minutes or so prior to unplugging the car (which would wake it up)?
    -Do you have a third-party app that pings the car periodically and keeps it awake?
    -Do you have charging scheduled so that it's still charging (or just recently finished charging) when you unplug it?
     
  16. Eno Deb

    Eno Deb Active Member

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    More likely the car wasn't in sleep mode when you tried. The easiest way to tell is if you have a quiet garage: listen for the whirring sound of the coolant pumps in the front of the vehicle. It's easy to miss if there is any background noise.
     
  17. brandonee916

    brandonee916 Member

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    It was parked at work all day long, I just walk up to my car and press the thumb button... it lights up, turns white and I pull it out. I'm on 34.1
     
  18. Need

    Need Active Member

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    So this morning I walked up to my car, press the button on the plug handle, the T turns blue and white immediately, and I was able to unplug without "holding the button" or "open the door first". To me, it is like how my trunk is behaving. Sometime it opens on first push, sometime I have to open the front door first. I think it is a problem with my phone. I know that if the app is open, everything works perfectly every time.
     
  19. jsmay311

    jsmay311 Member

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    For the record, I have a 0% success rate when trying to disconnect the charge connector first thing in the morning after it has charged overnight. VIN # is 37XXX.
     
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  20. ibdb

    ibdb Any excuse for a road trip

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    In 3+ years of charging our S the same way, in the same garage, using the same cable, this was never an issue. It's either a bug or a very poor design choice by the development team.
     
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