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The 10 Most Terrifying Things About Remote Key Repair
How to Fix a Key Fob That isn't Working

If your key fob isn't working There are a few simple steps that can fix it. The first step is to make sure that it's not the backup remote.

If the backup remote is able to lock and unlock your car door, it is most likely an issue with the main remote. Most car remote key failures are caused by circuitry or battery problems.

Battery

The battery inside the key fob may wear out over time. It is simple to replace a battery. However, it is important that you choose the right kind. You can check your owner's manual or call the manufacturer to inquire about the right type. It is also crucial to check the battery compartment as batteries that are not working properly can release caustic chemicals that can harm the remote. If changing the batteries doesn't solve the problem it could be that there are other issues that require attention from a professional. If the buttons are stuck or broken for instance it might be necessary to remove the remote and rebuild each component. You could also try reprogramming the vehicle to recognize the new fob.

Buttons

Key fobs can get dirty and worn-out from frequent use. It is not unusual for buttons to cease functioning, or require a hard push to make them work. This can be frustrating especially when you're away from your home and you need to start your car. Even worn-out or malfunctioning buttons can be fixed with a little time and the tools you already have at home.

First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and examine the circuit board. Look for evidence of rust, or other signs the buttons are damaged or worn. For example the paint that conducts electricity could be missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that has worn out or has conductive paint missing. Avoid rubbing too hard, as this can erode the conductive painting and prevent the button from firing when it is the button is pressed.

Also, make sure to inspect the battery connector's terminals to ensure any loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the situation. The same procedure can be used to restore function to any loose connections inside the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob aren't functioning or require a hard press to work, it is likely that the graphite disks at the back of the button are wearing down and require replacement. This can usually be done by rubbing a pencil over the disks, which should bring the button back to its original state.

If none of this is useful or if the button still does not respond to a firm press, then it may be the case that the circuit board itself has gone bad. It is possible to fix this with a quick clean and re-soldering, but it is recommended to have an additional fob on hand in the event that this method does not work for you.


Circuitry

Whether or not the key fob buttons function the circuit board in your remote may be dirty. A very thorough inspection will usually resolve this issue. The most common causes for dirty circuit boards are water and damaged cases. A broken case can let water and other debris to enter the circuit board, causing it to short out. Water can also eat through pins and vias, which are the tiny connectors that are found on the board.

If you're skilled enough to open your key fob, and aren't afraid of making an mess, you can remove the buttons from their sockets and put in new ones. It's also worth checking the connections between the battery terminals. If they're loose, the buttons may not function or get stuck in their down position. Soldering the terminals and button's back in place is usually all that's needed to return the key fob that is not working to functioning condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than the remote fobs they are contained in, but they can be damaged by a hole that is drilled into them or run over by a lawnmowers blade or car door handle. Most of the time, non-remote transponder chip failures can be attributed to a blown fuse.

If you're not comfortable opening the key fob, you may remove the circuitboard and utilize a multimeter to determine if the diode is operating properly. If car key fob repair 're not comfortable with this, go to your local Oreilly or hardware store and test their RF frequency tester. This will let you know whether the key fob transmits an RF signal.

Programming

Key fobs aren't impervious to destruction and are susceptible to being damaged by a lot of things. They may lose their connection with the receiver inside your vehicle due to shocks or a low battery, which calls for reprogramming. A professional auto locksmith or dealer will be able to reprogram your key fob and get it back up and running. If, in the unlikely event that resetting or repairing your key fob fails it could be the time to replace it completely.

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