How to Fix a Key Fob That isn't Working
If your key fob does not work and you're not sure why, you can fix it with a few simple steps. The first step is to be sure that it's not the backup remote.
If your backup remote is unable to unlock and lock the doors of your car, it is likely that the primary remote isn't functioning. Most problems with car remote keys result from circuitry or battery issues.
Battery
It is not uncommon for the battery inside a car key fob to wear out. It is simple to replace a battery. However it is essential to select the right kind. You can refer to the owner's manual or contact the manufacturer to inquire about the correct type. It's also a good idea to examine the battery compartment carefully, as dead batteries sometimes leak harmful chemicals that can cause damage to the remote. If replacing the batteries doesn't solve the issue, it may be that there are other issues that require professional attention. For instance, if buttons appear stuck or broken It may be necessary to take the remote apart and rework its parts. You could also try reprogramming your car to recognize the new key fob.
Buttons
From frequent use, key fobs may wear out and become dirty. It is not uncommon to have buttons stop functioning, or require a hefty push to make them work. car key fob repair can be a huge hassle particularly if you're away from home and need to start your car. Fortunately, even worn out or damaged buttons can be fixed with a bit of time and a few items you may already have around the home.
First, check that the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully remove the remote and inspect the circuit board. Look for signs of rust or other signs the buttons have been damaged or worn. For instance the paint that conducts electricity could be missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that is worn out or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when pressed.
Check the battery connector's terminals carefully for any loose solder connections. Soldering them back into place will allow the button to function again if this is the situation. The same process can be used to restore function to any loose connections in the fob.
If any of the rubber buttons located at the front of the keyfob aren't functioning or require to be pressing 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 on the disks, which will bring the button back to life.
If none of this is helpful or if the button still does not respond to a hard push It could be because the circuit board itself has gone bad. It is possible to fix this by cleaning and re-soldering the button however, you should have another spare in case it does not work.
Circuitry
The circuit board inside the remote control could be dirty, regardless of whether the buttons on the key fob work or not. The issue can be solved through a thorough examination. The most common causes for dirty circuit boards is water and damaged cases. A broken case can allow water and other debris to enter the circuit board, causing it to short. Water can also damage pins and vias, which are tiny connectors found on the board.
If you're handy enough to remove your key fob and don't mind a little mess, we can remove the solder from the buttons and put new ones in their place. Also, you should check the connections between the battery terminals. If they're loose, the buttons could not function properly or become stuck in their down position. Soldering the terminals and buttons back in place is usually all it takes to restore keys that are not in functioning condition.
Non-Remote transponder chips
The non-remote chips that are sealed are more durable than their remote fobs. However, they are susceptible to breaking in the event of a hole being drilled in them, or when a door handle for a car or lawnmower runs over them. The majority of non-remote transponder chip malfunctions could be attributed to an exploded fuse.
If you're handy enough to open the sealed key fob and can tolerate the mess, you can take off the circuit board and test the fuse using a multimeter for proper diode function. If you're not sure with this, visit your local Oreilly or hardware store and test their RF frequency tester. This will inform you whether the key fob sends signals.
Programming
Key fobs aren't impervious to destruction and are susceptible to damage by a lot of things. They may lose their connection with the receiver inside your vehicle due to shocks or low battery, requiring the reprogramming. A professional auto locksmith or the main dealer can reprogram your key fob and get it back working again. In the event that resetting or repairing your key fob doesn't work it could be the time to replace it completely.