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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends signals to your car to unlock the doors or start the engine. The fob may stop working due to a variety reasons. A dead coin battery is the most frequent reason for malfunctioning keys. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery If your key fob's battery has failed, the initial thing to do is replace it. Choose a button battery with the same voltage, size, and specifications as your previous 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. The trick is to use a paper towel soaked with isopropyl, or electronic cleaner. If the key fob doesn't working despite not being exposed to water, it could be due a malfunction in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob with an OBDII scan may assist in these situations. Water Damage If your key fob has gotten a bath in the puddle or pool or gone down the wash machine, you may have some water damage. It is usually possible to repair it by taking out the batteries and cleaning the circuit board using ruby alcohol. fiat replacement key thekeylab.co.uk 's a good idea let the fob 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 problem with the receiver module. You can find reprogramming instructions for most vehicles' remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob contains a chip which communicates with the vehicle's system. If the chip is damaged, it will be unable to longer be able to send or receive signals to the vehicle. Dropping the key fob could cause this, as could exposure to water. If the key fob stops working after water exposure it is possible to fix the issue by cleaning the chip with isopropyl alcohol, or electronic cleaner. If the key fob doesn't respond to cleaning, it is possible that the module has an issue and must be replaced. A damaged receiver module may also cause the remote control key to stop functioning. This is typically caused by electromagnetic interference. Faulty Electronic Chip The chip that is embedded in the key fob is a crucial component of the anti-theft systems in your car. It sends a signal to the immobiliser unit in your car to determine whether or not the key is genuine. Your car won't start in the event that the chip is damaged. A damaged chip could be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this situation, a new fob will be required. Contacts to the battery are not working properly. The battery contacts in a key fob are very delicate and may be damaged through repeated use. If they are bent or broken the fob will not send any signals to the receiver modules in the car. Modern fobs come with rubber seals that keep out water. In the event of submerging them in water, even if just an occasional drizzle or splash could damage the chip's electronic components. The key fob has an embedded chip that communicates to the immobilizer system of the vehicle to start it. This system uses crypto coding systems in the latest vehicles or the red key system in older ones. This chip will need to be replaced if damaged. Problematic 12 Volt Battery A faulty battery may cause the key fob to work. The car's system will not recognize the remote when this happens. Before you replace the battery, test it with a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops dramatically, it's time to replace it. To test the battery's power test the battery's capacity by placing an electrical load on it for a few minutes. This will eliminate 1percent of the charges. Then take another measurement of the voltage. The longer a battery is able to keep its voltage steady more effectively, the greater its capacity. Ideally, it will remain at or near 12 volts for several minutes. Faulty Radio Signal This is the most common reason for the key fob not sending signals to a car. This issue can be resolved by replacing the battery. It is important to buy a battery with the same voltage and dimensions as the original. Fobs can take a lot abuse, but they're also not impervious to destruction. The battery buttons and contacts are brittle and are susceptible to being bent or damaged from rough use. Other objects or transmitters using the same frequency can also disrupt the signal. A light-control panel at your home, for example, may interfere with key fobs that use the same bandwidth. This could interfere with your car's remote control. Faulty OBDII Scan Tool There are a number of reasons why a scanner could not work. Some are more complex than others. Professional scan tools let a mechanic observe the car's network, and run various self-tests. They can be huge time-savers, but they are also extremely expensive and are out of the range of most DIYers. If your OBD2 scanner isn't turning on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK it could be that a fuse has ruptured. This is one of the most frequent causes of a scan tool failing. The most straightforward fix is to replace the fuse which has blown.