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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends an indication from the fob to the car to unlock doors or turn on the motor. The fob could stop working for a variety of reasons. A dead coin battery is the most frequent reason for malfunctioning keys. Other causes are water damage as well as a defective module and interference signals. Dead Coin Battery Replace the battery if your key fob has gone out of service. Use a button cell that has the same voltage, size, and specifications as the previous one. If the key fob has been exposed to water, for example a splash of rain or salt water at the beach, it will need to be cleaned before it is able to be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner will be the solution. If the key fob doesn't working even though it is not exposed to water, it could be due to a glitch in the receiver module or in the internal electronic chip. Reprogramming the keyfob by using an OBDII scan may aid in these situations. Water Damage You could have water damage if your key fob was submerged in a puddle, pool or washing machine. It is usually possible to get it back to working by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's a good idea allow the fob to dry completely prior to installing a new battery. It could be that you have a defective module if your key fob stops working after replacing the battery or replacing it with. There are instructions for reprograming the majority of remote keys on YouTube, or consult the owner's manual. You can also reset your computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob has an electronic chip that communicates with the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. This could be due to dropping the key fob or through exposure to water. If the key fob you have purchased has stopped working due to exposure to water and you are unable to fix it by attempting to clean the chip using electronic cleaner or isopropyl alcohol. However, if the key fob continues to not respond even after cleaning it it is likely that the component is damaged and must be replaced. A defective receiver can cause the key to not work. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip inside your key fob plays a crucial role in the anti-theft security system of your car. www.thekeylab.co.uk sends a signal to the immobiliser unit in your vehicle to tell it whether the key is in fact valid. If the chip is damaged or broken, the car won't start. A malfunctioning chip could be caused by interference signals from objects like bad weather conditions or transmitters on the same frequency as your vehicle. In this instance an upgrade to the fob will be needed. Contacts to the battery are not working properly. The battery contacts of the fob's battery can be damaged by excessive usage. If they are bent, or broken, the fob won't send any signals to receiver modules in the vehicle. Modern fobs come with rubber seals that block out water. A splash of water or a light rain is acceptable, but submerging them in saltwater may damage the chip's electronic components. The key fob comes with chip that communicates with the immobilizer system of the vehicle to begin it. The system uses the red keys of older vehicles, or the cryptocoding system found in newer vehicles. This chip needs to be replaced if it's defective. Poor 12 Volt Battery A damaged battery can cause the key fob to cease working. When this happens, the car's computer system won't recognize that the remote is within the vehicle. Before replacing the battery, test it using a an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If the reading falls dramatically it is time to replace the battery. Set an electrical load for a short time on the battery to check its capacity. This will eliminate one percent of the surface charges. Then, measure the voltage again. The longer the battery can hold its voltage, the better its capacity. The ideal is to keep it close to 12 volts over several minutes. Problems with Radio Signal This is the most frequent reason for a key fob that stops sending signals to the car. This issue can be fixed by replacing the battery. It is crucial to buy batteries that have the same dimensions and voltage as the original. Fobs can take a lot abuse, but they're not impervious to destruction. Battery contacts and buttons can be damaged through rough handling. Other transmitters or objects operating on the same frequency can also disrupt the signal. For example, a light-control panel near your home may send interference on the same frequency as key fobs utilize. This could affect the remote control of your car. Faulty OBDII scan tool There are a number of reasons why a scan tool may not work. Some are more complex than others. Professional scan tools let mechanics to observe the car's network and run various self-tests. These tools can save time, but they are costly and out of reach for most DIYers. If your OBD2 scan tool isn't turning on, check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If all is fine, a fuse may have failed. This is among the most common causes of failures in the scan tool. It is typically simple to fix the issue by replacing the fuse blowing up.