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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain transponder chips that send signals to your car to open the doors and start the engine. The fob can stop functioning for a variety. A dead coin battery is the most common reason for key fob malfunctions. Other reasons include water damage, malfunctioning receiver modules and signal interference. Dead Coin Battery Replace the battery if your key fob is dead. Use a brand new button battery with the same size, voltage, and specification as the old one. If the key fob was exposed to water (such as saltwater or rain at the beach) it should be cleaned prior to using it again. A paper towel soaked in alcohol or electronic cleaner will work wonders. If the key fob is not working despite being not exposed to water it could be due to a problem in the receiver module or internal electronic chip. Reprogramming the keyfob by using an OBDII scan can aid in these situations. Water Damage There could be water damage if your key fob was submerged in a puddle, pool or washing machine. It is usually possible to get it back in working order by removing the batteries and cleaning the circuit board with ruby alcohol. It's a good idea let the fob dry completely before putting in a brand new battery. There could be a problem with the module in the event that your key fob stops working after replacing the battery or reprogramming. You can find information on the reprogramming of most remote keys on YouTube, or consult the owner's manual. You can also try resetting the car's computer onboard using the OBDII scan tool. Faulty Receiver Module The key fob contains the chip that communicates the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. The key fob being dropped can cause this, as could water exposure. If the key fob you have purchased has stopped functioning due to water exposure it is possible fix the issue if you clean the chip with electronic cleaner or isopropyl alcohol. However, if the key fob continues to not respond after cleaning it, then it is likely that the component is damaged and needs to 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 electronic chip in your key fob is a vital part in the anti-theft security system of your car. It transmits a message the immobiliser in your car to inform it whether the key is genuine. If the chip is damaged or broken, your vehicle will not start. A faulty chip can also be caused by interference signals from objects such as weather conditions, objects or transmitters operating on the same frequency close to your vehicle. In this situation, a new fob will be needed. Contacts for the battery that are defective The battery contacts on a key fob are very delicate and could be damaged by repeated use. If they are bent or broken the fob will not be able to send any signals to the receiver modules inside the car. Modern fobs are equipped with rubber seals that block out water. A splash of water or a light rain should be fine However, submerging them in saltwater may damage the chip's electronic components. The key fob is equipped with a chip which communicates with the immobilizer system of the vehicle in order to start it. It uses the old red keys for older vehicles or the cryptocoding system that is used in newer vehicles. If the chip is defective it will have to be replaced. A faulty 12 Volt battery A faulty battery can cause the remote to cease to function. The car's computer will not recognize the remote if this occurs. Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If spare key for fiat 500 drops significantly the time is now to replace it. To test the battery's power to determine its capacity, put an electric load on it for a few minutes. This will remove about 1 percent of the charge on the surface. Then, you can measure the voltage. The better the battery's capacity is, the longer it will keep its voltage. Ideally, it will remain at 12 volts or less for several minutes. Problems with Radio Signal This is the most frequent reason for the key fob to stop sending signals to the car. This issue can be resolved by replacing the battery. However, it is crucial to buy a new battery with the same voltage and size as the original one. Fobs take a lot of abuse, but they're not impervious to destruction. The battery contacts and buttons are delicate, so they can get bent or damaged by excessive use. A signal can also be affected by other objects or transmitters that operate on the same frequency. For instance, a light-control panel near your home may send interference over the same frequency as key fobs use. This could affect the remote control of your car. Faulty OBDII Scan Tool There are a variety of reasons why scanner tools may not work. Some are more complicated than others. Professional scan tools enable mechanics to monitor the car's network and run various self-tests. These tools can save time, but are expensive and not accessible to the majority of DIYers. If your OBD2 scan tool doesn't turn on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are both present it's possible that a fuse has blown. This is among the most frequent causes of a scan tool failing. The most straightforward fix is to replace the fuse that is blowing up.