Reasons Your Fiat 500 Key Fob Won't Work
A key fob from Fiat 500 is a great way to open the doors and begin the car. However, there are numerous reasons the fob could stop functioning. This includes a dead coin-battery, water damage, problems with the receiver modules, and interference.
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Dead Coin Battery
A dead battery is the most common cause of your 500 key fob that isn't working. Modern key fobs have a very limited operating range and must be within a few feet of the vehicle to operate. If you're far from your vehicle when you press the key fob button the car won't respond and will display a "Key Fob Not Detected" message in the instrument cluster.
If this happens If this happens, replace the battery in the coin-cell (Part Number CR2032) by a new one from a reputable brand like Panasonic Duracell or Energizer. They are available at your local hardware store or online.
After you've replaced the coin cell battery You can test it by standing close to your Fiat 500 and pressing the buttons. The parking lights should blink and the key fob will operate the lock and unlock switches.
If your key fob still isn't working after replacing the battery, it may be water damage that prevents it from communicating with the module inside your vehicle. Water damage can occur in many ways, such as the simple splash or submerging the key fob saltwater at the beach. If you suspect your fob has been exposed to water, try putting it in a dry rice bag to pull the moisture out. If that doesn't work, your fob is likely to need to be reprogrammed by an experienced locksmith or dealer.
Water Damage
The fob does have rubber seals to keep water out of the electronic chip inside, submerging it in the ocean or washing it in a machine can cause water damage. Saltwater poses a particular risk to the circuit board of the fob which causes it to short out and eventually die. It's not the best idea to submerge the fob in water however, but don't give it up if you accidentally drop it in water, or fail to take it out of your pants pocket.
Remove the battery first. Clean the electronic chip with isopropyl alcohol or a similar product and then dry it thoroughly before replacing the battery. Test the fob next to determine if it's working. If the fob doesn't function, it may need to be changed. This is usually done by a dealer or professional auto locksmith.
If the key is more recent and hasn't been programmed to your vehicle It will most likely need to be replaced completely. A professional locksmith for cars will be able to complete this process. The locksmith will require the key cut to match your vehicle's ignition. They will also need to reprogram the fob to your car's system. G28CarKeys is a simple and cost-effective process that is usually completed on the same day.
Receiver Module Issues
One of the most common reasons your 500 key fob might stop functioning is because it's out of range. The remote has a maximum range of 30 feet, so when you're too far from your vehicle it will not respond to your commands. This can be fixed by moving it closer to your vehicle until it begins responding.
If your fob won't work after replacing the coin battery, also known as a "button", "watch" or "button" or "button", it could be due to a problem with the internal circuit board. In the majority of cases, reprogramming your fob will solve the issue. You can find instructions on how to do this on the majority of automobiles by searching YouTube or looking through the owner's manual.
You may have to replace the metal retaining clips that keep the battery of your coin in place. If they become loose, it may prevent your battery from sitting properly and cause your remote to malfunction.
In rare instances it is possible that the fob will become desync'd with your vehicle due to software issues or hardware issues. This could be a huge trouble, but you could frequently fix this issue by visiting a local dealer or auto locksmith to reprogram your fob. In certain situations they may have to reinstall the software in your body control module, as well.
Interference
Interference can also cause the key fob to not receive or transmit signals. This can occur when the keyfob is in close proximity to a radio transmitter like a cell phone or radar detector. Other reasons the key fob could not function include a weak connection to the buttons or damage to the internal chip or water damage.
If the key fob failed to work one day suddenly and you've tried every option at home to solve it e.g. replacing the battery, reprogramming it and using the spare key fob, you could have a defective receiver module on your 500. The receiver module is located under the dash and receives the radio frequency signals from the key fob. It converts them into electronic commands that the vehicle interprets.
Fortunately, there's an easy method of resetting all of the onboard systems in your 500 device, including the key fob. Disconnect the battery for 15 minutes by taking off first the negative cable and then the positive cable. Reconnect the battery. This will get rid of any residual electricity and restart the car's computers. This can help get your key fob working again. If the issue continues, you should speak with an expert technician. They can diagnose the exact cause of your problem.