Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 is a convenient method to open the doors and start the car. There are many reasons why the fob may stop working. This could be due to a dead coin-battery water damage, problems with receiver modules, as well as interference.

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Dead Coin Battery

The most frequent reason why your 500 key fob will not function is a dead battery. Modern key fobs come with a limited range of operation, and must be within some feet of the vehicle in order to function. If you're far away from 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 occurs you need to replace the battery of your coin-cell (Part Number CR2032) by a fresh one of a reputable brand like Panasonic Duracell or Energizer. They are typically available at your local hardware store or online.

You can test the coin-cell battery by pressing the buttons while you're standing close to your Fiat 500. The parking lights should light up and the key fob will operate the lock and unlock switches.

If the key fob doesn't work after replacing the battery, it might have water damage that stops it from connecting to the receiver module in your car. Water damage can happen in many ways, such as an easy splash or submerging your key fob in saltwater at the beach. If you suspect your fob was exposed to water, try putting it in a dry rice bag to pull the moisture out. If this does not work, you'll need to have your fob reprogrammed either by an auto locksmith or a dealer.

Water Damage

Although the fob is equipped with rubber seals that keep water out of the chip's electronic circuit and out of the ocean or washing it in a machine can cause water damage. Saltwater can cause the circuit board to short and then die. It's not a good idea to submerge the fob in water, but don't give it up when you accidentally drop it in the water or don't take it out of your pocket.

First take the battery off the fob. Clean the electronic chip with isopropyl ethanol or a similar product and dry it completely before replacing the battery. Check the fob again to see if it is functioning. If the key doesn't work, it may need to be reset. This is typically done by a professional or dealer auto locksmith.

If the key is more recent and has never been programmed to your vehicle, it will likely need to be replaced completely. This is a simple procedure that can be handled by a professional locksmith for automotive use. The locksmith will have to cut the key to match the ignition of your car. The locksmith will also need to reprogram your fob into the vehicle's system. This is an affordable and quick process that can be completed in the same day.

Receiver Module Issues

One of the most common reasons your 500 key fob may 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 won't respond to your commands. It can be solved by moving closer to your vehicle until it begins responding.

If your fob does not work after you replace the battery in the coin, also called a "button", "watch" or "button" It could be a problem with the internal circuit board. In most cases, reprogramming the fob will fix the problem. You can find instructions on how to do this on the majority of vehicles by searching YouTube or looking through the owner's manual.

It could be necessary to replace the metal clips that hold the coin batteries in the correct position. If they become loose, it can prevent your coin battery from being properly seated and cause your remote to malfunction.

In rare instances, the fob may be out of connection with your vehicle as a result of hardware or software problems. It is possible to fix this issue by visiting your local dealer or fiat 500 keys auto-locksmith to reprogram your key fob. In some instances they may have to reinstall the software in your body control module as well.

Interference

Interference can also cause the key fob not to receive or transmit a signal. This can occur when the keyfob is in close proximity to a radio transmitter such as a cell phone or radar detector. The key fob might not work 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 have tried everything at home to fix it (e.g. You could have a malfunctioning 500 receiver module after you've tried replacing the battery, reprogramming it, or using a spare key fob. The receiver module, located under the dashboard, picks up radio frequency signals from your key fob. It transforms the signals into electronic commands which are then translated by the vehicle.

There's a simple method to reset the 500's on-board system including the keyfob. Disconnect the battery of 12 volts for about 15 minutes, by removing the negative cable first then the positive cable. Then reconnect the battery. This will eliminate any remaining electrical charge and restart the car's computers. This could allow you to the key fob to function again. If the problem persists you should seek out an expert technician. They will be able to diagnose the exact cause of your issue.