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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits the signal to your vehicle to open the doors or start the engine. However, the fob may stop working for several reasons. A dead coin battery is the most frequent reason for a key fob malfunction. Other causes include water damage the receiver module is defective and signal interference. Dead Coin Battery If your key fob battery has died, the first step is to replace it. Make use of a button cell battery with the same voltage, size, and specification as your old one. If the key fob was exposed to water (such as saltwater or rain at the beach) it must be cleaned prior to being used again. A paper towel soaked in isopropyl alcohol or electronic cleaner can be the solution. If the key fob is not working even though it is not exposed to water it could be due to a problem in the receiver module or an internal electronic chip. In these cases you can reprogramme the key fob using an OBDII scanner can aid. Water Damage You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It's usually possible to get it working again by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to allow the device to completely dry prior to installing a battery. You could have a damaged module in the event that your key fob stops working after replacing the battery or changing the programming. You can find reprogramming procedures for most vehicles' remote key fobs on YouTube or in the owner's guide. You can also try resetting the car's onboard computer by using the OBDII scan tool. Faulty Receiver Module The key fob contains a chip that communicates with the vehicle's system. If the chip is damaged, it will no longer transmit or receive signals to the vehicle. Dropping the key fob could cause this, as can exposure to water. If your key fob has stopped functioning due to exposure to water, you may be able to fix it if clean the chip using electronic cleaner or isopropyl alcohol. If the key fob doesn't respond to cleaning, it's likely that the module is in an issue and must be replaced. A defective receiver module could also cause the remote control key to cease functioning. This is usually due to electromagnetic interference. Electronic chip that is malfunctioning The chip inside your key fob plays a vital role in the anti-theft system in your car. It sends a signal the immobiliser unit in your car to determine whether or not the key is in fact valid. Your car will not start in the event that the chip has been damaged. A defective chip can be caused by interference signals from other objects such as weather conditions, objects or transmitters on the same frequency near your car. In fiat 500x key to the fob will be needed. Contacts of the battery may be damaged. The battery contacts on a key fob can be damaged through heavy use. If they're bent, or damaged, the fob will not transmit any signals to receiver modules in the vehicle. Modern fobs are designed with rubber seals in order to keep out water. Immersing them in water, even if it is just the slightest splash or drizzle can harm the chip's electronic components. The key fob contains an electronic chip that communicates with the immobilizer system of the vehicle, allowing it to start it. This system utilizes cryptocoding systems in vehicles that are more modern or the red key system in older models. This chip needs to be changed if it is defective. Poor 12 Volt Battery A malfunctioning battery could cause the key fob to work. The car's system will not recognize the remote if this occurs. Before you replace the battery, you should test it with a an voltmeter for determining its capacity. A fully charged battery will read 12.6 volts. If the reading drops 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 take away approximately 1% of the surface charge. Then, you can measure the voltage. The higher the capacity of the battery is, the longer it will maintain its voltage. Ideal is that it stays close to 12 volts during several minutes. Faulty Radio Signal This is the most frequent reason for a key fob to stop sending signals to the car. The battery is able to be replaced to resolve this issue. But, it is essential to purchase a battery that has the same size and voltage as the original one. Fobs aren't impervious to damage and are susceptible to damage. Battery contacts and buttons can be damaged by rough handling. Other objects or transmitters using the same frequency can disrupt a signal. For example, a light-control panel close to your home can transmit interference using the same frequency that key fobs utilize. This can interfere with the remote control of your car. The tool is not working properly. OBDII scan tool There are many reasons why a scanner tool may not work. Some are more complex than others. Professional scan tools enable mechanics to monitor the car's network and perform various self-tests. These tools can save you a lot of time, but they are costly and not accessible to the majority of DIYers. If your OBD2 scanner won't start, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present it's possible that a fuse is blowing. This is the most common reason for failure of the scan tool. The easiest solution is to replace the fuse that has been blown.