How to do it yourself, replace the battery for your 451 smart car key fob.
Пікірлер: 7
@TheRealElbadoo9 ай бұрын
Your video is helpful and easy to follow, except that you're describing the polarity of the battery backwards. On 3 volt lithium button cells like the 2016 battery used here, the positive terminal is the outer shell of the battery. It's clearly marked "+", as can be seen at 1:36 in your video. The smaller inner part that's separated by an insulator from the outer shell is the (unmarked) negative terminal. It's easy to get this confused, because it's the exact opposite of alkaline and most other other cells we use. As you show in the video, the battery goes into the case with the positive shell-side-down in the holder and the contacts touching the side. The negative center part of the battery is what's facing up to touch the contacts on the electronics module.
@graemetaylor89335 жыл бұрын
Yep, very helpful
@alalba26674 жыл бұрын
Thanks
@loufrank25182 жыл бұрын
mine the positive goes down
@flitsies5 жыл бұрын
So after you swapped out the battery did the unlock system still work, cos some don't you have to reset the key to the car again.
@rotaryfd3stt5 жыл бұрын
The key is already programmed to your vehicle it won't reset the program on your car, I change mine about every 3-4 months to insure longer keyless entry distances so you can unlock or lock the car from farther away. Also if your key looks weathered/warned like the plastic looks old you can replace the plastic or the rubber buttons as well from smart madness i believe they have plastic covers and rubber buttons for your smart key.
@flitsies5 жыл бұрын
@@rotaryfd3stt Here's an interesting point I discovered. I swapped out my battery on my smart, and found the key stopped working, It started the car no problem but just wouldn't open or close the doors I put in a brand new tested battery the voltage was correct bang on, I tried everything the key wouldn't work. So I thought perhaps it's the battery? Even though it's brand new so I put in another battery same thing, I decided to try a different brand of battery bingo doors worked perfectly but only after I had pressed the button with the key in the car held on for around 10 seconds. So I tried the other battery again, and even though it was of equal power rating but a cheaper brand the key still didn't work. So the solution I found was to use Panasonic cells over other brands for some reason that's the only brand I have found that actually works in the key fob for opening and closing the doors. The cheap unicell or Tianqiu or Hm power cells simply don't work, I suspect it's the amperage output of the cheap cells over the Panasonic cells, clearly the Panasonic cells put out more power. I think it also makes a difference how long the battery is out of the key as to whether or not you need to press the open door button for 10 seconds while in the car, the 10 second thing works cos I had to do exactly the same thing with my spare key.