Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can experience problems with time, like the loss of functionality. While some issues may require professional attention, the majority can be resolved at home.
The battery replacement is usually the first step. Most fobs run on a flat watch-style battery, which can be easily found at hardware stores or auto parts stores.
Dead Battery
It can be an incredibly issue when a key fob's battery dies. This is especially true when you are far from home. However, there are options to get back on the road even when your car's keyless entry isn't working.
One of the first things to examine is to determine if the buttons on your key fob function. If they do not, the problem could be with the locks on your car.
If your keys won't unlock, you might find a mechanical slot within the trim around your door handles or elsewhere in your car (consult the owner's manual). Insert the mechanical key and try again. If this fails, some cars have an app that can open doors remotely. what google did to me and myMazda apps, for example allow owners to open their doors using their smartphones. These apps are charged a monthly fee for subscription.
It is also important to ensure that your key fob isn't draining the car's battery by resting on it. A dead fob can drain your battery quickly especially if it's used to control your phone or TV while you're watching.
A key fob that's low on battery can be activated by holding it right up to the start button. It's a quick solution that could save you going to the dealer or select Interstate All Battery Center locations.
You can also determine if your key fob is actually dead by testing it in a different vehicle that has the push-button ignition. If it's not working, the fob battery probably needs replacement. It's a good idea keep a spare key fob in your bag or purse.
Damaged Buttons
If your key fob isn't able to open doors or start the vehicle remotely, it's possible that one or more of its buttons have been damaged. The key fob has an electronic circuit that has "contact pads" which are covered by an electrically conductor film. The film wears away over time. This wear could cause your device to respond less or not at all.
The good news is that the contact pad inside the car key fob is easy to replace, and is done with the help of an easy flathead screwdriver. If the case is damaged or badly damaged it may be difficult to open. You'll need to take it to an auto shop to repair the fob.
It's not common for a key fob being dropped, trampled, or exposed water. All of these incidents can cause physical damage, such as breaking and snapping keys.
This could also cause internal damage to the fob that could cause a malfunction. It's a good idea therefore, to always carry a spare fob in your wallet or pocket in the event that the one you're using fails.
Make sure the battery is charged first to determine if the buttons on your key fob aren't working in the way they should. Be aware that key fobs don't come with a particular kind of electronic device - they're typically powered by the same batteries for two dollars that are used in watches and hearing aids, which are readily accessible at drug stores, hardware stores, and on the internet.
If the battery is fine, it's likely that the buttons are dirty or worn out, and can be cleaned using a moist cloth to clean them. If they're still not responding, you can test a different key fob to see whether the problem is with yours, or with a specific type of car key fob. If the other fob functions it's likely that your key fob needs to be reset or perhaps replaced entirely.
Reprogramming
The hidden world of car keys fobs is more complex than many myths suggest. Basic fobs operate using radio frequency signals that are specific to each car. The fobs must be properly programmed to allow unlocking and starting the vehicle. Unfortunately it's not as simple as pressing a few buttons and with very few exceptions it must be handled by the dealer.
The procedure of reprogramming a fob is based on the model and model year of the car you own It is therefore essential to consult the owner's manual to get step-by-step instructions. Certain manufacturers, like Mercedes, use proprietary technology that makes sure only dealers can create the new fob and sync it with your vehicle. However some independent shops provide this service as well and you should look up reviews and prices prior to choosing the shop.
Certain car models erase all other fobs once they're changed. This means you'll need to have any additional fobs programmed by professionals. This can be expensive, especially if your fob has stopped working. Even if the mechanical key won't start the vehicle, it's a good idea to have a backup key that can open the trunk and doors.
Be prepared for a gruelling experience if you choose to reprogram your fob by yourself. There are numerous guides available online that promise success but you're likely to be disappointed. Many of these guides were written by people who have no knowledge of this field and often are founded on unsubstantiated claims. Some even claim that you can program your car key fob in just a few clicks, which is extremely confusing.
The battery is usually secured with an elastic clip that is easily removed. However the circuit board is home to the battery, and you will need to carefully remove the battery using an instrument. Once you've got inside, you should be able to find the button cell battery, which is typically a small watch battery that can be purchased at most pharmacies or at home improvement stores. Replacing the battery is usually a straightforward procedure, and it's always worth trying first before replacing the entire device.
Replacement
If a car key fob is damaged or isn't functioning, it's important to know that there are a few ways to fix the issue. It is possible to fix the problem quickly by replacing the battery or reprogramming your key fob. However, a more extensive repair may be required. It can also be helpful to keep a spare fob in case one gets lost or stolen.
Modern key fobs are more expensive and difficult to replace since they have a physical key as well as the electronic. Some "smart fobs" even include remote starters. It's important to be aware that it can take up to an hour to cut and program the replacement fob to your vehicle.
Fobs communicate with the car's receiver by using a small radio transmitter built into circuit boards. Pressing the button triggers the transmitter, and it transmits a unique RF signal to the car's receiver. The receiver receives the signal and validates it against the preprogrammed codes. This allows the driver to start the car from a distance, without the need to put the key in the ignition.
If the buttons on the fob you have purchased fail to respond or work sporadically it could indicate that they've been damaged due to water or other elements. It is possible to repair the fob by taking it apart and examining it for broken or non-responsive buttons. If this doesn't resolve the issue, try reprogramming the fob or purchasing a new fob.
It is best to check with a local auto dealer or a locksmith prior to purchasing a replacement keyfob to ensure that it's compatible with the security system of your vehicle. The fobs from the aftermarket can be less expensive however, you must look into the brands and read reviews prior to trying to program them yourself. While certain fobs can be repaired by a trusted locksmith, other models require special programming equipment that can only be used by a vehicle dealer or auto technician.