Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs can have issues, such as a malfunction. Some issues may need professional attention, however many can be fixed at home.
The first step is usually to replace the battery. Most fobs utilize flat watch-style batteries that are readily available in hardware stores or auto parts stores.
Dead Battery
It can be a major inconvenience when a key fob's battery goes out. This is especially true when you're away from home. There are methods to get your car back on the road if your keyless entry system has stopped working.
One of the first things you should examine is whether the buttons on your key fob function. If they do, then the problem may lie in the locks of your car instead of the fob.
If your keys will not unlock, you might find a mechanical slot within the trim around the door handles or in other places on your car (consult the owner's manual). Insert the mechanical key and try again. If this doesn't work, some cars have an app that can open doors remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for example let owners unlock their doors with their smartphones. These apps are charged a monthly fee for subscription.
Also, you should ensure that your key fob isn't draining the car's battery by sitting on it. A dead key fob can drain your battery, especially when you use its remote features while watching TV or talking on the phone.
The key fob should be held right up to your car's start button can sometimes start a key fob with a low battery. It's a quick fix that will save you a trip to the dealer or even select Interstate All Battery Center locations.
You can also find out whether your key fob actually dead by testing it in a different vehicle that has the push-button ignition. If it doesn't work, it could be necessary to replace the battery on your fob. This is why it's a good idea keep an extra key fob in your bag or purse.
Damaged Buttons
If your key fob is unable to open doors or start the car remotely, it's possible that one or more of its buttons have been damaged. The key fob may contain circuit boards with "contact pads" for each button. These tiny pads are coated with a conductor of electricity that wears away over time. This wear could cause your device to respond slower, or not to respond at all.
The good news is that the pad inside a car key fob is simple to replace and is done with the help of a flathead screwdriver. However, if the key fob is severely damaged or smashed in any way, it could be more difficult to remove the case, and you'll be required to take the fob into an auto shop for repair.
It's not unusual for a key fob to be dropped on hard surfaces, walked on, or exposed to water. All of these can cause physical damage to the keys, such as bending or snapping them.
It could also affect the internals of the fob which could result in malfunction. It is a good idea, therefore, to always carry an additional fob in your wallet or pocket in case the one you're currently using breaks.
Examine the battery first to determine If your key fob's buttons are not responding like they should. Key fobs do not require any special electronic device. They utilize the same battery for two dollars that is used in hearing aids and watches. how to repair car key fob are available at drug, hardware, and online stores.
If the battery is in good condition it's likely that the buttons are worn down or dirty and can be cleaned by using a damp cloth to wipe them down. If the buttons still don't work, try an alternative car key fob. This will help determine if the problem is yours or an specific model. If the other key fob functions it is possible that yours needs to be reset or replaced.
Reprogramming
The secret world of car keys fobs is much more complex than many myths suggest. The basic fobs work on unique radio frequency signals that are assigned to specific cars. The fobs have to be programmed correctly in order for them to unlock and start the vehicle. Reprogramming a key fob not as easy as pressing several keys. It's usually done by the dealer.
Refer to the owner's manual for detailed instructions. Certain manufacturers, such as Mercedes have proprietary technology that only the dealership is capable of creating a brand new key fob and then resync it to your vehicle. Some independent shops might offer this service, so be sure to read reviews and prices prior to choosing a shop.
Some car models will erase all other fobs when they're programmed, meaning you'll have to have any additional fobs professionally programmed. This can be costly, especially if you're just one functional fob. Even in the event that the mechanical key will not start the vehicle, it's a good idea to have a backup option that can open the trunk and doors.
Be prepared for a difficult experience if you opt to reprogram your fob yourself. There are numerous guides available online that promise success however, you're likely to be disappointed. A lot of these guides were written by people with no experience and are based on unsubstantiated claims. Some of these guides claim that you can easily program your car key fob yourself with only a few clicks. This is false.
The battery is usually secured with a plastic clip, which is easily removed. However, the circuit board contains the battery, and you will need to carefully remove the battery with a tool. You should be able find the button cell battery. This is usually a small battery for watches that you can purchase at most pharmacies or at home improvement stores. It's usually easy to replace the battery. Before replacing the whole device, you should try it first.
Replacement
If your car key fob is damaged or has stopped working it is important to know there are several ways to remedy the problem. It may be possible to resolve the issue quickly by replacing the battery or programming your key fob. However it is possible that a more extensive repair may be needed. A spare fob could be helpful in the event that one is stolen or lost.
Modern key fobs are more expensive and difficult to replace because they contain an actual key as well as the electronic. Certain "smart" fobs even have a built-in remote starter. It's therefore important to be aware that it can take up to an hour for a replacement key fob cut and programmed to your vehicle.
Fobs communicate with the car receiver using a small radio transmitter built into the circuit board. By pressing a button the transmitter emits an RF signal unique to the car's receiver. The receiver is able to recognize and compare the signal to preprogrammed codes. This allows the driver to start the car from a distance, without having to put the key in the ignition.
If the buttons on your key fob are not responding or working in a sporadic manner, they may have been damaged by water. You could be able to repair the fob by removing it and looking for any damaged or unresponsive buttons. If this doesn't resolve the issue, try reprogramming or buying an entirely new fob.
You should check with an auto dealer in your area or a locksmith prior purchasing a replacement keyfob online to make sure it's compatible with the security system of your vehicle. You can find aftermarket fobs cheaper, but it's important to study the brands and read reviews prior to attempting to program them. Some fobs can be changed by a locksmith who is reputable and other models require programming equipment that only a mechanic or dealer is able to utilize.