Reasons Your fiat doblo key replacement 500 Key Fob Won't Work

A key fob for the Fiat 500 makes it easy to open doors and start your vehicle. However, there are many reasons the fob could stop functioning. This could be due to a dead coin-battery, water damage, issues with the receiver module, and interference.

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Dead Coin Battery

A dead battery is the most frequent cause of your 500 key fob not working. Modern key fobs come with a limited operating range, and must be within some feet of the vehicle in order to function. If you're not close to your vehicle and 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, simply replace the battery on your coin cell (Part number CR2032) by a new one from a trusted brand like Panasonic, Duracell, or Energizer. You can find them in your local hardware store or on the internet.

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 light up and the key fob should operate the lock and unlock switches.

If the key fob won't work after replacing the battery, it could have water damage that prevents it from communicating with the receiver module inside your car. Water damage can happen in a variety of ways, ranging from an accidental splash to submerging the fob salt water at the beach. If you believe your fob was exposed to water, place it in a rice bag to draw out the moisture. If that doesn't work your fob is likely to need to be reprogrammed by an experienced auto locksmith or by the dealer.

Water Damage

The fob does have rubber seals that 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 end up dying. It's not a good thing to let the fob get wet however, don't give it up if you accidentally drop it in the water or don't remove it from your pants pocket.

First, remove the battery from the fob. Clean the electronic chip with isopropyl or a similar product and then dry it thoroughly before replacing the battery. Then, test the fob to test if it works. If the fob doesn't work, it may have to be reprogrammed. This is typically done by a professional or dealer auto locksmith.

If your key is a bit older and is not programmed to work with your vehicle then you'll need to replace it completely. A professional locksmith for cars can complete this simple process. The locksmith will have to cut the key to match the ignition in your vehicle. They'll also need to reprogram the fob in your car's system. This is a cheap and fast process that can be completed on the same day.

Receiver Module Issues

One of the simplest reasons your 500 key fob could stop working is that it's simply out of range. The remote usually has a range of 30 feet or less and if it's far from your car, it will not respond to your commands. It can be solved by moving it closer to your vehicle until it starts responding.

If your fob won't work after replacing the battery inside the coin, which is also known as a "button", "watch" or "button" it may be due to a malfunction on the internal circuit board. Reprogramming the fob is usually the solution to the issue. You can find instructions on how to do this for most vehicles by searching YouTube or looking through the owner's manual.

It's possible that you need to replace the metal clips that hold the battery of your coin in place. If they become loose, it could prevent your coin battery from being properly seated, causing your remote to malfunction.

In rare instances it is possible that the fob will become desync'd with your vehicle because of software or hardware issues. You can fix this problem by visiting your local dealer or auto-locksmith to reprogram your key fob. In some instances, they may need to install the software again in your body control module, too.

Interference

Interference can also cause the key fob to not be able to receive or transmit signals. This could occur if the key fob is close to a radio transmitter (cell phones or radar detectors) or any other source of electromagnetic radiation. The key fob may not function because of a weak connection to the buttons, water damage or damage to the internal chips.

If the key fob has been unable to function for a while suddenly, or after trying everything you can do at home to resolve it e.g. You might have a damaged 500 receiver module if you've tried replacing the battery, reprogramming or using an alternative replacement key for fiat ducato van fob. The receiver module is located under the dash and picks up the radio frequency signals from the key fob. It then converts them into electronic commands that the vehicle interprets.

There is a simple way to reset the 500's on-board system including the keyfob. Disconnect the battery for 15 minutes by removing first the negative cable, then the positive cable. Reconnect the battery. This will clear any residual electricity, and allow you to restart the car's computer. This can help get your key fob to function again. If the issue persists you should speak with an expert technician. They'll be able to determine the root of your issues.