Car Key Repair - How to Fix a Dead Remote
Car remotes provide a great convenience to drivers. They can unlock doors, open trunks and even start the car. However, they can stop working at odd times.
If you notice that your key fob not working, try a few simple fixes before going to the dealership. These steps could save you money.
Keyless Entry System
Rather than needing to fumble around with keys in your purse or pocket Instead of fumbling around with keys in your purse or pocket, you can walk to your car, press a button on the key fob, and then open the doors and start the engine. It's a simple feature that makes driving a car more comfortable and safe. But just like any device, the keyless entry system may be damaged by frequent use or due to other reasons. If you've had issues with yours, you have two options: Go to the dealership or contact the local locksmith.
A keyless entry system operates by sending radio signals and then scouring for the response signal on the key fob. If the system is able to recognize the signal, the vehicle's doors are not locked and the onboard computer is activated. Certain systems have another transmitter located in the trunk of the car that can be opened when you put one foot underneath it.
Each key fob is given an individual digital identification number by the manufacturer. A proprietary technical process called "programming" is used to configure the fob with a specific car's system. This involves turning the ignition of the car repeatedly in a certain sequence, and may also require pulling buttons or levers, or removing fuse.
Once a key fob is programmed to your car's keyless entry system it transmits its digital identity code as well as an operation code that tells the car what to do (lock, unlock or open the trunk). The receiver in the car confirms that the transmitter is who it claims to be through an authentication and encryption procedure. The computer on board will unlock the vehicle and start the engine if it is authorized.
A savvy criminal could steal and use the code transmitted between the keyfob and vehicle. This will require a special device that records the transmission, and then retransmits it when the system doesn't expect it to. Most keyless entry systems utilize the rolling code method to combat this. This ensures that every new transmission signal received by a vehicle has a counter value that is different from the previous one.
Batteries
The most frequent reason for car remotes key fobs not working is a dead battery. If you have an extra key fob it's a cheap and easy fix. The majority of fobs are powered by watches-style batteries, which can be bought at hardware stores or big-box stores for less than $10. You can find instructions to disassemble your key fob on the internet or in your car's manual.
Be careful not to damage any circuits or antennas inside the case once you've removed the battery. They're likely to hold the key fob's program to your specific car and tampering with them can cause it to become impossible to program (and probably not work). If you need to move key fobs, take care. Some key fobs may have fasteners which can easily pop out and scatter key fob pieces all over your living space.
The case of most key fobs is equipped with a single screwdriver hole. To open it, use a tool to pry it open. To begin by putting the tool along the outside edge of the case like you would peel an orange or apple. Don't apply too much pressure as the case of the key fob is usually constructed of plastic and can crack or break when you exert too much force.
If you're ready to replace the battery, be sure to match the size and type to your key fob. Some key fobs have two batteries while others require one. The wrong battery could render your remote keyfob useless.
If the issue persists, you can try again using your fob's key after installing the new battery. If it doesn't, you'll need to determine whether your device has an issue that is more complex and requires a professional diagnosis and repair. key fob repairs may need to have the key fob reprogrammed at the dealer or purchase another one.
Buttons
The tiny buttons on your key fob are tiny, and filled with delicate electronics. It's not surprising that they will malfunction from time to time. If the car key button suddenly stops working, you can usually fix it yourself.
The most common reason that a car remote stop working is due to dirt or crud has gotten lodged between the buttons. To get rid of this issue, take off the batteries in a careful manner and scrub each button with an abrasive that has been dipped into the rubbing alcohol. Be sure to dry the batteries completely before reinstalling them.
It's also possible that the key fob has been damaged in some way, possibly dropped on concrete or accidentally scratched by a sharp object. If this is the scenario, you can test the function of your key fob using a different one.
The door lock sensor might have been unable to function in your vehicle. It's a tiny metal part that's connected to the door lock button on your key fob, and it's not common for this sensor to break after long use or exposure to extreme weather conditions. To reactivate the sensor, simply try pressing your key button a few times without locking or unlocking your doors to reset it.
If all else fails, you can test the capabilities of a spare key by opening and locking your doors using it. If the spare key doesn't work, you may need to contact a locksmith on call 24 hours a day who offers automobile key repair to make your remote work again.
If your car's key fob does work, and it's still not locking or unlocking the vehicle, you can try to reprogram your computer system. Be aware that if you've had the same key fob for a period of time, it will have to be programmed each few months to ensure that it remains in sync with your vehicle. It's not the ideal situation but it's better than having to replace the remote completely.