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How to Fix a Key Fob That isn't Working
If your key fob doesn't work, a few easy steps can fix it. The first step is to make sure that it's not your backup remote.
If your backup remote is unable to lock and unlock the doors of your car, then it is likely that the primary remote is not working. The most frequent causes of key problems with your car remote are circuitry or battery issues.
Battery
The battery inside the key fob could get worn out over the course of time. It is simple to replace a battery. However it is essential that you use the correct kind. You can check your owner's manual or call the manufacturer to determine the correct type. It is also essential to check the battery compartment, since batteries that are not working properly can release toxic chemicals that could damage the remote. If replacing the batteries doesn't solve the issue it could be because there are other issues that require attention by a professional. If the buttons are damaged or stuck for instance it could be necessary to disassemble the remote and rework each component. You can also try reprogramming the vehicle to recognize the new fob.
Buttons
From frequent use, key fobs could get dirty and worn. It is not common to have buttons stop functioning, or require a hefty push to make them work. This can be very frustrating especially when you're away from your home and need to turn on your car. Even broken or damaged buttons are often fixable with a little effort and the tools you already have at home.
First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Take the remote apart and inspect the circuit board. Examine for signs of rust or other signs that the buttons are worn or damaged, like missing conductive paint. Utilizing a Q-tip dipped in rubbing alcohol, gently clean any membrane contacts that have damaged or have conductive paint missing. Avoid rubbing too hard as this can erode the conductive paint and stop the button firing when the button is pressed.
Examine the battery connector's terminals for loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the case. You can apply the same procedure to restore functionality to any other loose connection inside the fob.
If any of the rubber buttons at the front of the keyfob isn't functioning or require to be pressed very hard, the graphite disks at the back of the button might have worn out and require replacement. This can be done by rubbing a pencil over the disks, which will bring the button back to working.
If all of this doesn't help, or if the button does not respond to a firm press It could be because the circuit board itself has gone bad. It is possible to fix this by cleaning and re-soldering your fob, but you should have a spare in case it doesn't work.
Circuitry
The circuit board inside your remote control may be dirty, regardless of whether the buttons on the key fob work or not. A very thorough inspection will usually resolve this problem. The most common causes for dirty circuit boards is water and broken cases. A damaged case can allow water and other debris to enter and short circuit the electronics. Water can also damage pins and vias, which are the tiny connectors found on the board.
If you're able to open up your key fob, and you're not afraid of making a mess, we can take off the buttons and then solder new ones in their place. It's also worth checking the connections between the battery terminals. If they're loose, the buttons could not function or get stuck in their down position. Soldering the terminals and buttons back in place is usually all that's needed to return keys that are not in working condition.
Non-Remote transponder chips
The non-remote chips that are sealed are more durable than their remote fobs. However, they are susceptible to cracking when a hole is made into them or in the event that a door handle of a car or lawnmower runs over them. Failures of the fuse are typically the cause of non-remote chip failures.
If you're handy enough to remove a key fob that is sealed and are able to bear the mess, you can take off the circuit board and test the fuse using a multimeter for proper diode function. If you're unsure about doing this, go to your local hardware store or Oreilly's, and they usually have a RFID frequency tester that can let you know whether the key fob is sending a signal.
Programming
click this site fobs aren't impervious to destruction and are susceptible to being damaged by a lot of things. They can break their connection with the receiver inside your vehicle due to shocks or a low battery, which calls for the reprogramming. A professional auto locksmith, or the main dealer, can reprogram your keyfob and get it up and running again. In the rarer case that resetting and fixing your key fob isn't working it could be the time to replace it all over again.