Car Key Repair - How to Fix a Dead Remote
Car remotes provide a excellent convenience for drivers. They can unlock doors, open trunks and even start the engine. These remotes are prone to malfunction at the most inconvenient of times.
If you discover that your key fob no longer working, try a few quick fixes before heading to the dealership. These steps may save you money.
Keyless Entry System
You don't have to look for keys in your purse or pockets. Just walk up to your vehicle, press the button on the keyfob, and the doors will be opened and the engine will start. It's a simple function that makes driving a car more relaxing and secure. However, just like any other device it's possible that the keyless entry system may be damaged by repeated use or because of other reasons. If you've had issues with yours, there are two options: Go to the dealer or contact the local locksmith.
Keyless entry systems operate by sending radio signals and then looking for the response signal from a key fob. If the system recognizes the signal, it's triggered to unlock the car doors and activate the onboard computer. Certain systems have a second transmitter on the trunk of the car which opens it when you waggle your foot beneath it.
Each key fob is given an individual digital identification number by the manufacturer. A specific process of technology called "programming" is used to configure the fob to work with the specific car's system. This involves turning the ignition of the car several times in a specific sequence. It may also require pushing or pulling buttons or levers, or even removing the fuse.
Once a key fob has been programmed to your specific car's keyless entry system it transmits its digital identity code as well as a function code that tells the car what to do (lock, unlock, or open the trunk). The car's receiver confirms the identity of the transmitter through an authentication and encryption process. If it's authorized, the onboard computer unlocks the vehicle and then starts the engine.
A skilled criminal could snoop and then use the code that is transmitted between the keyfob and the vehicle. This will require a device that records the transmission and then transmits it again in the event that the system doesn't want it. To help combat this issue, the majority of keyless entry systems rely on rolling code, which ensures that each new transmitter signal received by the vehicle has a different counter than the previous one.
Batteries
A dead battery is the most frequent reason for car remotes not to function. If you have an extra key fob, it's a low-cost and simple fix. Most fobs are powered by watch-style batteries that can be bought at big-box stores or hardware stores for less than $10. A quick search of the internet or your car's owner manual should provide instructions on how to disassemble the fob that you have been using and swap out the battery.
Be careful not to harm any antennas or circuits in the case after you've removed the battery. They are likely holding the key fob's program to your specific car and any disruption to them can cause it to become impossible to program (and most likely not work). If you must move the key fobs, be cautious. Certain key fobs could have fasteners which can easily pop out and scatter key fob pieces all over your living space.
Most key fobs have one hole that can be used with an screwdriver or similar tool to open the case, but it's a good idea put your tool on the outside of the case first, just as you were peeling an apple or orange. Don't apply too much pressure since the case of the key fob is typically made of plastic, and it is prone to break or crack when you apply too the force.
If you're ready to replace the battery, be sure to match its size and style to your key fob. Some key fobs have two batteries, while others only need one. The wrong battery could make your remote key fob useless.
After the new battery has been put in place, try using your key fob once more to see if it solves your problem. If it doesn't, you'll need to determine if your fob has an issue that is more complex and requires a professional diagnosis and repair. If this is the case, you might need to have it reprogrammed by a dealer, or you may need to purchase a new key fob altogether.
Buttons
The buttons on your key fob could appear small however they're packed with electronic components. It's not surprising that they'll occasionally fail. If the button on your car's ignition suddenly stops working, you can usually fix it yourself.
One of the most common reasons a car key remote fails to function is because dirt or grit has accumulated between the buttons. To get rid of this, carefully remove both the batteries and clean each button with a cotton swab coated with ruby alcohol. Be sure to dry them thoroughly prior to replacing the batteries.
It's possible that your key fob was damaged in any way, for example, being dropped on concrete or accidentally scratched. If this is the case using a different key fob to check its functionality might reveal that it has simply been damaged and needs to be replaced.
Another possibility is that the door sensor for your car's lock has stopped working. It's a tiny metal piece that is connected to the key fob's door lock button. It is not uncommon for it to break due to weather conditions or long use. Press your key button a few times without locking or unlocking your doors. This resets the sensor.
If all else fails, you can always check the functioning of the spare key by attempting to open and close your doors with it. If Ongoing doesn't work, it may be necessary to locate a 24-hour locksmith that offers automobile key repair in order to get your remote operating again.
You can change the settings on your computer if your car key button is working however it cannot lock or unlock your vehicle. If you have had the same key fob a time, it may require reprogramming every few months to continue working with your vehicle. It's not ideal, but it is better than having to purchase a new remote.