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The No. 1 Question Everyone Working In Remote Key Repair Should Be Able Answer
How to Fix a Key Fob That isn't Working

If your key fob isn't functioning There are a few simple steps that can fix it. First, make sure that it's not the backup remote.

If the backup can lock and unlock your car door, it is most likely an issue with the primary remote. The majority of car remote key malfunctions are caused by circuitry or battery issues.

Battery

The battery in the key fob may wear out over time. It is quite simple to replace batteries, but it is crucial to ensure you select the correct one; you can look in the owner's manual or talk to the dealer for the manufacturer to find out the kind of battery you need. It is recommended to examine the battery compartment carefully since dead batteries may leak caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the problem it could be because there are other issues that require attention from a professional. If the buttons are damaged or stuck, for example it could be necessary to disassemble the remote and rework each component. You can also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs may become dirty and worn-out from frequent use. This is not atypical however it can cause buttons to stop working or require a difficult press to get them to work. This can be extremely frustrating particularly if you're away from home and need to start your vehicle. Fortunately, even worn out or damaged buttons can be fixed with just a bit of time and a few items you have in the house.

First, check that the batteries are correctly inserted and that the indentation on the back of the button has been filled. Open the remote carefully and inspect the circuit board. Examine for indications of rust or other signs the buttons are worn or damaged. For instance, conductive paint may be missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has become worn out or where conductive painting is missing. Don't rub too hard as this can damage the conductive paint, and block the button from firing when pressed.


Also, be sure to check the battery connector's terminals for an unattached solder connection. Soldering them back in place will restore the button's functionality If this is the case. The same procedure can be used to restore functionality to any other loose connections in the fob.

In the end, if any of the rubber buttons on the front of the key fob stop functioning or require a long press to function it is likely the graphite disks that are on the back of the button are wearing out and require replacement. This can be done by rubbing a pencil on the disks, which will bring the button back to its original state.

If all of this doesn't help, or if the button doesn't respond to a firm press It could be that the circuit board itself has gone bad. It is possible to fix this issue by cleaning and re-soldering your fob however, you should have a spare in case it doesn't work.

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Whether or not the keys fob buttons are functioning the circuit board that is inside your remote may be dirty. A thorough inspection is often enough to resolve this problem. The most common causes for dirty circuit boards are water and damaged cases. A damaged case can allow water and other debris into the circuit board, which can cause it to short out. Water can also damage pins and vias, which are small connectors found on the board.

If you are handy enough to open your key fob, and you don't mind making a mess, we can take the buttons out of their sockets and put in new ones. It's also worth checking the battery terminal connections. If they're loose, the buttons may not function or get stuck in their down position. Soldering the terminals back to their original positions is often enough to restore a non-working fob back to working.

Non-Remote transponder chips

Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, but they can be broken by a hole being drilled into them or run over by a lawnmowers or door handle for a car. The majority of non-remote transponder chip failures could be attributed to a blown fuse.

If you're not comfortable opening the key fob, you can take the circuit board off and use a multimeter to check that the diode is working correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob is sending an RF signal.

Programming

Key fobs aren't impervious to destruction and can be damaged by a variety of factors. They can lose their pairing with the receiver inside your vehicle due to shocks or low-battery, which requires the reprogramming. A professional auto locksmith or main dealer can reprogram your key fob to get it back up and running. If resetting or repairing your keyfob does not work it is possible to replace it.

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