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How to Fix a Key Fob That isn't Working
If your key fob doesn't work and you're not sure why, you can fix it with a few simple steps. The first step is to make sure that it's not your 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. The most common causes for car remote key failure are issues with the circuitry or battery.
Battery
It is not uncommon for the battery inside the car key fob to get worn out. It is relatively easy to replace batteries, but it is crucial to make sure that you use the right type that you can refer to 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 inspect the battery compartment thoroughly because dead batteries can leak harmful chemicals that can harm the remote. If changing the batteries does not solve the problem, it may be that there are other issues that require attention by a professional. For example, if buttons seem to be stuck or damaged it could be necessary to disassemble the remote and rebuild its components. You could also try reprogramming the vehicle to recognize the new key fob.
Buttons
Through frequent use, key fobs can get dirty and worn. It is not unusual for buttons to stop 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 switch on your car. Even broken or damaged buttons are often fixable with a little time and tools you already have at home.
First, verify that the batteries are correctly inserted and that the indentation on the back of the button is filled. Take the remote apart and inspect the circuit board. Look for signs of corrosion or other signs that the buttons are worn out or damaged, like missing the conductive paint. Use the Q-tip, dipped in rubbing alcohol, gently clean any membrane contacts that have become damaged or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint, and block the button from firing when pressed.
Examine the battery connector's terminals for loose solder connections. Soldering check here them back in place will allow the button to function again if this is the case. The same method can be used to restore function to any loose connections inside the fob.
If any of the rubber buttons located at the front of the keyfob isn't functioning or require to be press very hard, the graphite disks at the back of the button might have worn out and will need to replaced. This can usually be done by rubbing a pencil on the disks. This should bring the button back to its original state.
If none of these solutions work or you not be able to get the button respond when pressed hard, it could be that the circuitry is failing. It is possible to fix the issue by cleaning and re-soldering the fob however, you should have another spare in case it doesn't work.
Circuitry
Whether or not the keys fob buttons are functioning the circuit board that is inside your remote may be dirty. This problem can be resolved by a thorough inspection. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case can let water and other debris to here enter the circuit board, which can cause it to short out. Water can also eat through pins and vias, which are small connectors found on the board.
If you're handy enough to open your key fob, and you're not afraid of some mess, we can remove the solder from the buttons and solder new ones in their place. It's also worth looking at the battery terminal check hereclick here connections. If they're loose, the buttons could not function or get stuck in their down position. Soldering terminals and buttons back into place is usually enough to restore a non-working fob to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are much more durable than remote fobs that have them but they can be cracked by a hole that is drilled into them or over by a lawnmowers blade or door handle for a car. Most of the time, non-remote transponder chips fail, and this can be attributed to a blown fuse.
If you're not confident opening the key fob, take the circuit board off website and use a multimeter to verify that the diode is operating properly. If you don't feel comfortable with this, go to your local Oreilly or hardware store and utilize their RF frequency tester. This will inform you whether the key fob sends signals.
Programming
Key fobs are not indestructible and are susceptible to damage by a lot of things. They can break their connection with the receiver inside your vehicle because of shocks or a low battery, which calls for changing the program. A professional auto locksmith or the main dealer can reprogram your key fob and get it back functioning again. If resetting or fixing your key fob fails it is possible to replace it.