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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends signals from the fob to the car in order to unlock doors or turn on the motor. However, the fob may be inoperable due to various reasons. A dead coin battery is the most common cause of key fob malfunctions. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery in case your key fob has died. Choose a new button battery with the same voltage, size and specification like the previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) it should be cleaned prior to using it again. The best solution is to use a paper towel soaked with isopropyl or electronic cleaner. If the key fob isn't working even though it is not exposed to water, it could be due to a glitch in the receiver module or an internal electronic chip. In these cases it is possible that reprogramming the key fob with an OBDII scanner may aid. Water Damage You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It is usually possible to get it back in working order by getting rid of the batteries and cleaning the circuit board using rubbing alcohol. It is best to let the circuit board completely dry before installing batteries. There could be a problem with the module if your key fob stops working after replacing the battery or updating. You can find the instructions for reprograming the majority of remote keys on YouTube or consult your 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 a chip that communicates with the car's system. If this chip becomes damaged, it will no longer transmit and receive signals to the vehicle. A key fob falling off can cause this, as could exposure to water. If the key fob is not working after water exposure it is possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol, or electronic cleaner. If the key fob is still unable to not respond even after cleaning it you can be sure that the module is faulty and will need to be replaced. A damaged receiver can cause the key to not work. This is usually caused by electromagnetic interference. Electronic chip that is malfunctioning The electronic chip in your key fob plays an important role in the anti-theft security system in your car. It transmits a message the immobiliser in your car to inform it that the key is valid. If the chip is damaged or broken, your vehicle will not start. A damaged chip could be caused by interference signals from objects like bad weather conditions or transmitters operating on the same frequency as your vehicle. In this case, a new fob will be required. Contacts with the battery may be damaged. The battery contacts on the fob's key can be damaged by heavy usage. If they are bent, or damaged, the fob will not transmit any signals to receiver modules in the vehicle. Modern fobs come with rubber seals in order to keep out water. Submerging them in water, even if it's only small splash or drizzle could damage the chip's electronic components. The key fob is equipped with an electronic chip that communicates with the vehicle's immobilizer system to allow it to start. This system utilizes cryptocoding systems in vehicles that are more modern or the red key system for older models. The chip must be replaced if it's damaged. The 12 Volt Battery is faulty A malfunctioning battery could cause the key fob not to work. When this happens, the car's computer system will not be able to recognize that the remote is within the vehicle. Before you replace the battery, you should test it with a a voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If fiat 500 key fob decreases significantly then it's time to replace it. To test the battery's capacity put an electrical load on it for a few minutes. This will take away approximately 1 percent of the charge on the surface. Then measure the voltage again. The higher the capacity of the battery, the longer it can keep its voltage. The ideal is to keep it close to 12 volts during several minutes. Faulty Radio Signal This is the main reason for a keyfob that ceases to send signals to the car. The battery could be replaced to fix this problem. It is crucial to purchase a battery with the same dimensions and voltage as the original. The buttons are not impervious to destruction and can withstand a lot. The battery contacts and buttons are delicate and are susceptible to being bent or broken with rough use. Other transmitters or objects using the same frequency could also interfere with the signal. A light-control panel at your home, for example, may interfere with key fobs which use the same bandwidth. This can interfere with the remote control in your car. Afflicted OBDII scan tool There are a number of reasons why a scan tool might not work. Certain are more complicated than others. Professional scan tools let a mechanic observe the car's networks and run various self-tests. These can be real time savers, however they can be expensive and are out of the range of most DIYers. If your OBD2 scan tool isn't turning on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they are all OK the fuse could have blown. This is the most common reason for failures of the scanner. It is generally simple to fix the issue by replacing the fuse that has blown.