Dead 12-volt start battery
Dead 12-volt start batteryEarlier, August of 2024 to be exact, we got a panicked call from a friend whose car, a Tesla Model Y, was giving her real headaches. It turned out to have a dead 12-volt start battery.
A number of messages were being displayed in a seemingly random fashion on her instrument panel, but one indicated a problem with the 12-volt battery. Her car is electric, so when she seeing battery caused the panic, but in effect all EVs have 12-volt batteries too, needed to start the electronics. We posted on this at our website and you can see it here.
She was fortunate to have enough power left to actually get in the car. However, no Tesla models have mechanical keys available to accomplish this if the 12-volt battery is actually dead.
The video demonstrates how to get inside a Tesla if the 12-volt battery dies so that the battery can be charged or replaced. The instructions are in the owner’s manual, which inside the locked car on the center screen.
Each model has are two wires, red and black or positive and negative, available somewhere at the front of the Tesla to connect to. The Model 3, Model Y and Model S give identical access behind tow eye cover in the bumper on the left side. The gif file to right is a pretty good demo, but its more difficult in practice.
We added the Model X and Cybertruck as well. You can see the video here on our Tesla page here or on YouTube here.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
There are three basic locations to try, as shown in the image, but experience tells us you might just as well skip to the last one. The first, top to bottom, is to simply drop the key fob into the cup holder. If this fails, hold the key fob against the front of the console, as we are doing in the image (second). There are several places that can be tried in this case alone.
If all these fail, the next recommendation is to remove the battery from the fob and run through the options again. As it happens, this is exactly what we had to do with the Model X we had and we landed at the base of the console before the car recognized the fob. That location, with the key fob resting in place, is shown in the second image. The fob was recognized at last and we were able to operate the car.
If you were given a key card, place it against the left side of the of the space at the front of the center console just below the screen, as shown to the right. The vehicle will recognize the card, the instrument panel will come to life and the car will be ready for action. Don’t lose the card!
If your mobile phone has gone dead or is missing, place the key card on the center console behind and between the two cup holders. The car will recognize the card and will allow it to be driven.
In the earliest versions of the Model S, the back of key fob is to be placed against the passenger side front fender, somewhat below and to the right of the emblem, as shown in the image. When the fob is recognized, the door handles will extend as they do normally.
The concept is the same in the newer Model S, but the location is changed. However, it remains on the passenger side. Place the key fob near the base of the passenger side windshield wiper. The image to the right shows the exact spot that worked in the model we tested, and we tried several. Then press the driver’s door handle. The handles will extend if it is recognized, but it took a full 20 seconds in the car we tested. Try repositioning the fob if this fails. If it continues not to be recognized, try removing the battery and go back through the process.
Tesla’s Model X uses an entirely different back up location. There again is no hard key or key cylinder. In addition, the door handles do not extend in normal operation as with the Model S. The mirrors will extend when the key fob is recognized.
To get in, the key card is placed on the door frame between the front and rear doors on the driver’s side and just above the bottom of the windows, as shown. As with other models, the mirrors will extend inviting you inside. The vehicles can be locked this way as well.
Tesla Model S Incident Shines a Laser on a Broader Problem
Tesla Model S Incident
We watched with a good deal of fascination the running battle between New York Times reporter John Broder and Tesla Motors CEO Elon Musk. Broder took to the interstate system in the northeast to test the Tesla Model S and the company’s charging stations. The resulting debacle has Tesla reeling, and while we hope and believe the end result will be a positive for the company and the buying public, we see a different problem and one that is faced daily by all car manufacturers, not just Tesla.
The reality is that new technology in nearly all new cars has drivers calling roadside assistance and service departments at alarming and increasing rates. Most drivers are more like Broder – average Joes rather than car jocks. What happened to Broder and Tesla is frankly not a new phenomenon. But because it is Tesla, the issue he faced received a great deal of attention and presents an opportunity to focus on a growing knowledge gap.
Case in point: shortly after the East Coast debacle, autoblog.com posted a video of Kelly Blue Book’s Micah Muzio – for the record, a car jock – attempting a trip from LA to Las Vegas in a Model S. On the way, he and his cameraman pulled into the Tesla Design Center to get a rundown on the car. And there we are, one minute and six seconds into the 14 minute video, and the screen shows in big bold letters “Warning! Information Overload!”
Overload Indeed
This is what an entire industry runs headlong into every day, and manages to miss! A driver getting too much information to process and remember. And in this case, the managing editor for a top automotive website!
Seriously, what chance does everyone else have???
It really is time to pause and think about this.
In the back and forth that erupted on Twitter, Rebecca Greenfield of the Atlantic Wire posted “If a New York Times reporter, with an entire squadron of Tesla employees at his disposal, can’t use a Model S electric car properly, as Tesla founder and C.E.O. Elon Musk strongly asserted in a tweet this afternoon, it doesn’t say much about the usability of Tesla’s cars for regular people.”
And while she is right, our assessments from the trenches suggest that new car dealer service departments handle nearly 30 million calls a year related to electronics issues in gas and hybrid powered vehicles (17,000 new car dealers in the U.S. and Canada averaging a half dozen calls per day). And a whole lot of those drivers are also in vehicles that won’t move, or that they are afraid to move.
These are not electric cars, but they offer a good deal of new technology unfamiliar to the driving public. Drivers need and want a car they can get into, start and drive. They have full lives and more than enough to deal with without their car companies expecting them to learn every detail about their rides.
This is not just about usability. It is also about how a vehicle communicates its status and needs to its driver. Lights, chimes, buzzers and text have been rendered useless.
The laser focus placed on the Tesla Motors incident is an opportunity to shine a light on and re-think this entire process and come up with something as new as the electric car itself. We firmly believe that Tesla will make the improvements needed in its cars. We hope that the same will be true of its car-to-driver interface, and that of every other manufacturer.
——————————————————————-
Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY