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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder which transmits an electronic signal from the fob to the car to unlock doors or turn on the motor. The fob may stop working for a variety of reasons. The most common reason for key fob failure is the battery of the coin is dead. Other causes are water damage, the receiver module is defective, and signal interference. Dead Coin Battery Replace the battery if the key fob has failed. Use a button cell battery with the same voltage, size, and specifications as the old one. If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before using again. The trick is to use a paper towel soaked with isopropyl or an electronic cleaner. If the key fob has not been exposed to water, but it is still not working it could be a problem with the receiver module or an internal electronic chip. In these situations you can reprogramme the key fob using an OBDII scanner could assist. Water Damage You might 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 back to working by taking the battery off and cleaning the circuit board with isopropyl alcohol. It's best to allow the fob to dry completely before putting in a brand new battery. If your key fob has stopped working even after replacing the battery and reconfiguring it, you may have a faulty receiver module. There are reprogramming guidelines for most vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset the computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob contains an electronic chip that communicates with the car's system. If this chip becomes damaged, it will no longer transmit and receive signals to the vehicle. This can be caused by dropping the key fob or through exposure to water. If the key fob stopped working after exposure to water, it is possible to fix the issue by cleaning the chip using isopropyl alcohol or electronic cleaner. If the key fob does not respond to cleaning, it is possible that the module has an issue and should be replaced. A malfunctioning receiver could cause the key to stop working. 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 of your car. replacement key fiat 500 transmits a message the immobiliser inside your car to determine that the key is valid. Your car will not start in the event that the chip is damaged. A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters close to your vehicle. In this situation you'll need an entirely new key fob. Contacts for the battery that are defective The battery contacts of the key fob are delicate and can get damaged through repeated use. If they're damaged or bent, the fob will not send any signals to the receiver modules inside the car. Modern fobs feature rubber seals to keep out water. Submerging them in water even if it's only a light drizzle or splash, can damage the chip's electronic components. The key fob has a chip that communicates with the vehicle's immobilizer to allow it to activate it. The system relies on cryptocoding systems in newer vehicles or the red key system used in older ones. If this chip is faulty, it will need to be replaced. A faulty 12 Volt battery A defective battery can cause the remote to cease to function. The car's computer won't recognize the remote if this occurs. Before replacing the battery, test it with an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly then it's time to replace it. Set an electrical load for a few seconds on the battery to check its capacity. This will take away about 1 percent of the surface charge. Then take another measurement of the voltage. The longer the battery is able to keep its voltage steady greater is its capacity. It should be close to 12 volts several minutes. Faulty Radio Signal This is the most typical reason for a key fob that ceases to send signals to the car. The battery can be replaced to fix this issue. However, it is important to purchase a battery that is the same size and voltage as the original one. Fobs are not indestructible and can be damaged by a lot. The battery buttons and contacts are brittle, so they can get bent or broken with rough use. The signal could also be impacted by other transmitters or objects who use the same frequency. A light-control system in your home, for example can interfere with key fobs using the same bandwidth. This can interfere with the remote control in your car. Faulty OBDII Scan Tool There are a number of reasons why a scanner could not function. Some are more complicated than others. Professional scan tools allow a mechanic to monitor the car's network and conduct a variety self-tests. These can be real time savers but they're also expensive, and beyond the budget of many DIYers. If your OBD2 scan tool fails to turn on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If all is fine there is a chance that a fuse has blown. This is one of the most frequent causes of a scan tool failing. It is typically easy to fix the problem by replacing the blown fuse.