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Reasons Your Fiat 500 Key Fob Won't Work
A key fob for the Fiat 500 allows you to easily open doors and start your vehicle. However, there are many reasons the fob could stop functioning. These include a dead battery damaged receiver module, water damage issues, and interference.
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Dead Coin Battery
A dead battery is the main reason for your 500 key fob not functioning. Modern key fobs come with a restricted operating range, and should be within a few feet of the vehicle to operate. If you're far away from your vehicle and press the key fob button the car won't be able to respond, and will display an "Key Fob Not Detected" message in the instrument cluster.
If this happens, replace the battery in the coin cell (Part number CR2032) by a new one from a trusted brand like Panasonic, Duracell, or Energizer. They are available at your local hardware store or on the internet.
You can test the battery of your coin-cell by pressing the buttons while you're standing close to your Fiat 500. The parking lights should blink and the key fob will operate the lock and unlock switches.
If the fob's remote doesn't function after replacing the battery, it might have water damage that stops it from communicating with the receiver module in your vehicle. Water damage can happen in a variety of ways, such as simply splashing or submerging the key fob in saltwater at the beach. If you suspect your fob was exposed to water, you can try placing it in a dry rice bag to pull the moisture back out. If this isn't working, you'll need to have the fob replaced by an auto locksmith or a dealer.
Water Damage
The fob does have rubber seals that keep water out of the electronic chip inside it, submerging it in the ocean or washing it in a machine could cause water damage. Saltwater can be particularly harmful to the circuit board of the fob which causes it to short out and eventually die. mobile 's not a good idea to get the fob wet however, but don't give it up when you accidentally drop it in water or fail to take it out of your pocket.
Take the battery off first. Clean the electronic chip with isopropyl alcohol or a similar product and then dry it thoroughly before replacing the battery. Test the fob afterward to determine if it's functioning. If the key does not function it could need to be programmed again. This is typically done by a dealer or professional auto locksmith.
If the key is newer and has not been programmed to your car it is likely to need to be replaced completely. This is an easy process that can be carried out by a professional locksmith for automotive use. The locksmith needs to cut the key to match the ignition in your vehicle. The locksmith will also have to reprogram your fob into the vehicle's system. This is a simple and inexpensive process that is usually completed on the next day.
Receiver Module Issues
One of the simplest reasons why your 500 key fob could stop functioning is that it's out of range. The remote typically has 30 feet of range or less and if it's far away from your car it will not respond to your commands. This can be easily fixed by moving it closer to your vehicle until it begins responding.
If your fob doesn't work after replacing the battery for the coin, also known as a "button", "watch" or "button" It could be due to an issue with the circuit board inside. Reprogramming the fob usually resolves this issue. You can find the instructions for the majority of vehicles on YouTube or in the owner's manual.
You may need to replace the metal clips that keep the coin battery. If they become loose, it may prevent your battery from being properly seated, causing your remote to malfunction.
In rare instances, the fob could be out of alignment with your vehicle because due to hardware or software issues. This issue can be fixed by visiting your local dealer or auto-locksmith to reprogram your key fob. In some instances it is possible that the software will require reinstallation to your body control modules.
Interference
In addition to a dead coin battery, the key fob may not be able to transmit or receive the signal due to interference. This can occur when the key fob is in close proximity to a radio transmitter such as a cell phone or radar detector. The key fob might not function because of a weak connection to the buttons water damage or damage to the internal chips.
If your key fob suddenly stopped working, or you've tried everything at home to fix it (e.g. replacing the battery, reprogramming it and using the spare key fob, you may have a malfunctioning receiver module on your 500. The receiver module is situated under the dash and receives the radio frequency signals from the key fob. It transforms the signals into electronic commands, which are then translated by the vehicle.
There is a simple way to reset the 500's on-board system, including the keyfob. Disconnect the battery for 15 minutes by taking off first the negative cable and then the positive cable. Reconnect the battery. This will remove any remaining electricity and restart the car's computers. This can help get your key fob working again. If the issue continues it is recommended that you consult an experienced technician. They'll be able to identify the root cause of your problem.