Car Key Repair - How to Fix a Dead Remote
Car remotes are an excellent convenience for drivers. They allow you to unlock doors, gain access to trunks and even start the engine. But, these remotes sometimes cease to function at uninviable times.
If you discover that your key fob is not working, try a few simple fixes before heading to the dealership. remote car key repair could save you money.
Keyless Entry System
There's no need to search for keys in your pockets or purse. Just walk to your car, push the button on the keyfob and the doors will be opened and the engine will get started. It's a simple function that makes driving a car more comfortable and secure. However, just like any other device, the keyless entry system may be damaged by frequent use or due to other factors. If you've encountered issues with yours, there are two options: Go to the dealership or contact the local locksmith.
The way that a keyless entry system functions is by releasing radio signals, and then searching for a corresponding response signal from the key fob. If the system detects the signal, the car's doors are unlocked and the onboard computer activated. Certain systems include a second transmitter on the trunk of the car which opens when you move one foot underneath it.
Each key fob is given a unique digital identification code by the manufacturer. The fob is programmed using a unique process called "programming". This requires turning the ignition of the vehicle repeatedly in a certain sequence. It may also require pulling levers or buttons or removing fuse.
Once the key fob is programmed into your car's keyless system, it transmits a digital identity code and a function code that instruct the car to (lock or unlock the trunk). The car's receiver verifies the transmitter's identity through an authentication and encryption process. The computer on board will allow the vehicle to be opened and start the engine if it is authenticated.
There are concerns that a skilled criminal could intercept the code transmitted between the key fob and the car. This would require a specific device to record the transmission and then retransmit it later when the system isn't expecting it. Most keyless entry systems utilize rolling codes to prevent this. This ensures that each new transmission signal received by a vehicle has a counter value that is different from the previous one.
Batteries
A dead battery is the main reason for the car remote to not work. If you have an extra key fob it's a low-cost and simple fix. Fortunately, the majority of fobs have regular watch-style batteries that are sold in hardware stores or big-box retailers for as little as $10. You can find the steps to disassemble the key fob on the internet or in your car's manual.
Be careful not to harm any circuits or antennas inside the case after you've removed your battery. They're likely to be holding the key fob's programming to your particular car, and messing with them will render it unprogrammable (and probably not work). If you have to move them, do so very gently, as certain key fobs have fasteners that are able to open and scatter key fob pieces all over your living room.
Most key fobs have one hole that can be used with a screwdriver or other pry tool to open the case, however it's best to wedge your pry tool around the outside of the case first, just as you would peeling an orange or apple. Be careful not to apply too much pressure, since the case of the fob is usually constructed of plastic and could break or crack if you apply too much pressure to it.
If you're ready to replace the battery, be sure to match the size and type to the key fob. Some key fobs have two batteries while others require one. The wrong battery can cause your remote to become useless.
If the issue continues then you can try it again using your key fob after installing the new battery. If not, you'll need to determine whether your key fob is suffering from an issue that is more complex and requires professional diagnosis and repair. If this is the case, you could need to have it reset by a dealer or purchase a replacement key fob entirely.
Buttons
The buttons on your key fob could be tiny but they're loaded with electronics. So it's not too surprising that they're likely to fail from time time. If the car key button suddenly stops working, you can usually fix it yourself.
The most common reason a car remote key stops working is due to dirt or crud has gotten stuck between the buttons. To fix this, remove the batteries carefully and scrub each button with a cotton swab that has been dipped into rubbing alcohol. Be sure to dry them completely before replacing the batteries.
It's possible that your key fob is damaged in any way, for example, being dropped on concrete or accidentally scratched. If that's the case, using a different key fob to check its functionality might reveal that it has simply been damaged and needs to be replaced.
The door lock sensor could have stopped working in your car. It's a tiny metal component attached to the key fob's door lock button. It's not common for it to fail due to weather conditions or prolonged use. Press your key button several times without locking or unlocking your doors. This resets the sensor.
If all other options fail, you can test the functionality of the spare key by attempting to unlock and lock your doors using it. If the spare key doesn't work, you may need to call a locksmith 24 hours a day who can repair your car keys to get your remote working again.
You can change the settings on your computer if the car key button works however it cannot lock or unlock your vehicle. However, keep in mind that if you've used the same key fob for a long time, it's likely to need to be programmed each few months to ensure it continues to work properly with your vehicle. It's not optimal, but it's better than having to buy an entirely new remote.
