Car Key Repair - How to Fix a Dead Remote
Car remotes are a great convenience for drivers. They can unlock doors, open trunks and even start the car. But, these remotes sometimes stop working at inconvenient times.
Before you go to the dealer, try some quick fixes when your key fob stops working. These tips could save you money.
Keyless Entry System
There's no need to search for keys in your purse or pockets. Simply walk up to your car, push the button on the keyfob, and the doors will open and the engine will begin. It's a convenient feature that has made the experience of car driving more enjoyable and safer. But, like all devices it's possible that the keyless entry system can break from repeated use or because of other factors. If you're having problems with your system, you can either visit the dealer or call an locksmith.
Keyless entry systems operate by sending radio signals and then looking for a response signal from a key fob. If the system can recognize the signal, it will trigger to unlock the car doors and activate the onboard computer. Some systems have another transmitter located in the trunk of the car which opens when you move a foot under it.
Each key fob is equipped with an unique digital identity code that's given by the manufacturer. The fob is programmed by an exclusive process known as "programming". This usually involves turning the car's ignition several times in a certain sequence, and could also require pulling or pushing various levers and buttons or taking out fuse.
When a key fob is programmed to your specific vehicle's keyless entry system it transmits its digital identification code along with a function code that tells the car what to do (lock in, unlock, or open the trunk). The car's receiver verifies that the transmitter is who it claims to be using an authentication and encryption process. The onboard computer will allow the vehicle to be opened and start the engine when it is authenticated.
There are concerns that a clever criminal could intercept the code that's transmitted between the key fob and the car. these details would require a device to record the transmission then retransmit it later in the event that the system doesn't anticipate it. To prevent this from happening, most keyless entry systems rely on the rolling code method that ensures that every new transmitter signal received by the vehicle has a different counter value than the previous one.
Batteries
A dead battery is the most common reason for the car remote to not work. If you have an extra key fob it's a simple and inexpensive fix. Most fobs are powered by watch-style batteries that can be purchased at hardware stores or big-box stores for less than $10. A quick search of the internet or your vehicle's owner's manual will provide directions on how to take apart your key fob and swap out the battery.
Be careful not to damage any of the circuits or antennas within the case once you've removed the battery. If you do this, the key fob will become unprogrammable and will not work. If you must move them, do it very gently, as some key fobs have fasteners that are able to pop open and scatter key fob parts all over your living room.
The majority of key fobs have one hole that can be used with the screwdriver or another pry tool to pop open the case, but it's a good idea to put your tool on the outside of the case first, as if you would peeling an apple or orange. Do not apply too much pressure, as the case of the fob is usually made of plastic and can break or crack if apply too excessive force to it.
Make sure you ensure that the size and type of battery to the key fob when replacing it. Some fobs require two batteries, whereas others have only one, and the incorrect battery could render your key fob remote useless.
If the issue persists, you can try again with your key fob after installing the new battery. If not, you'll need to determine if your fob has a more complicated issue that requires professional diagnosis and repair. You may need to have the fob reprogrammed by an authorized dealer or purchase another one.
Buttons
The buttons on your key fob might be small however they're packed with electronic components. It's not surprising that they will fail from time-to-time. If the car key button suddenly ceases to function, you can usually fix it yourself.
One of the most frequent reasons why a car key remote fails to function is due to dirt or dust that has accumulated between the buttons. To fix this, remove the batteries carefully and scrub each button with a cotton swab that is dipped in the rubbing alcohol. Be sure to dry them completely before installing the batteries.
It's possible that your key fob has been damaged in some way, like being dropped on concrete or accidentally scratched. If this is the scenario, you can test the functionality of your key fob by using a different one.
Another possibility is that the door sensor for your car's lock has stopped working. This sensor is a small metal piece that is connected to the key fob's door lock button. It is not unusual for it to break due to weather conditions or extended usage. Press your key button several times without locking or unlocking your doors. This resets the sensor.
If all else fails, you could always check the functioning of the spare key by attempting to open and close your doors using it. If the spare key does not work, it may be necessary to find an emergency locksmith who can provide car key repair to get your remote operating again.
You can change the settings on your computer if your car key button is working, but it still cannot lock or unlock your vehicle. However, keep in mind that if you've owned the same key fob for a period of time, it's going to need to be programmed each few months to ensure it remains in sync with your vehicle. It's not an ideal situation, but it's better than having to replace your remote completely.