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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends a signal from the fob to the car in order to unlock doors or turn on the motor. However, the fob may stop working due to a variety of causes. The most common cause of key fob failure is the battery of the coin is dead. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery If the battery in your key fob has failed, the initial thing to do is replace it. Use a button cell that has the same voltage, size, and specification as your old one. If the key fob has been exposed to water, like a splash of rain or salt water on the beach, it needs to be cleaned before it is able to be used again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will work wonders. If the key fob hasn't been exposed to water, but it is still not working it could be due to an issue with the receiver module or an internal electronic chip. In these situations it is possible that reprogramming the key fob using an OBDII scanner can aid. Water Damage There could be water damage to your key fob if it was submerged in a puddle, pool or washing machine. It's usually possible to get it back in working order by removing the batteries and cleaning the circuit board using ruby alcohol. It's best to let the board completely dry before putting in batteries. You may have a faulty module if your key fob stops working after replacing the battery or updating. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob's chip is an electronic chip that communicates with the vehicle's system. If this chip becomes damaged, it will no longer be able to send or receive signals to the vehicle. This could be due to dropping the key fob, or due to exposure to water. If your key fob has stopped functioning due to water exposure or water exposure, you might be able to fix it if you clean the chip with electronic cleaner or isopropylethanol. However, if the key fob continues to not respond after cleaning it there is a good chance that the component is damaged and must be replaced. A damaged receiver module may also cause the remote control key to cease functioning. This is usually caused by electromagnetic interference. Faulty Electronic Chip The chip inside your key fob plays a vital part in the anti-theft security system in your car. It sends out a signal the immobiliser device in the vehicle to determine whether the key is genuine. If the chip is damaged or broken, your car won't start. A malfunctioning chip could be caused by interference signals from other objects like bad weather conditions or transmitters operating on the same frequency in close proximity to your vehicle. In this instance the replacement fob will be required. Contacts for the battery that are damaged The battery contacts on the fob's battery can be damaged due to heavy use. If they're bent, or damaged, the fob will not send any signals to the receiver modules inside the vehicle. Modern fobs come with rubber seals in order to keep out water. A splash of water or light rain is acceptable but submerging them into salt water could harm the electronic chip. The key fob has an electronic chip that communicates with the vehicle's immobilizer to allow it to activate it. The system uses the old red keys in older vehicles, or the crypto coding system in newer cars. This chip will need to be replaced if it's defective. Faulty 12 Volt Batterie A damaged battery can cause the key fob to stop working. The car's computer may not recognize the remote when this occurs. Before you replace the battery, you should test it with a a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly then it's time to replace it. To test a battery's capacity put an electrical load on it for a couple of minutes. This will remove 1percent of the surface charges. Then take fiat 500 replacement key cost of the voltage. The better the battery's capacity and the longer it can keep its voltage. Ideally, it will remain close to 12 volts several minutes. Problems with Radio Signal This is the most common reason for keys not sending signals to vehicles. This issue can be resolved by replacing the battery. But, it is essential to purchase a battery that has the same size and voltage as the original one. Fobs can take a lot punishment, and aren't indestructible. Battery contacts and buttons can be damaged through rough handling. Other transmitters or objects that use the same frequency can interfere with a signal. A light control panel in your home, for example, may interfere with key fobs using the same frequency. This can interfere with the remote control of your car. Problems with OBDII Scan Tool There are a number of reasons why a scan tool could not function. Certain are more complicated than others. Professional scan tools permit mechanics to observe the car's networks and perform a variety of self-tests. These are great time savers, however they can also be very expensive, and out of the range of most DIYers. If your OBD2 scan tool doesn't turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If all is fine, a fuse may have failed. This is one of the most common causes of a scan tool failing. The simple fix is usually to replace the fuse which has blown.