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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends signals to your car to open the doors and start the engine. The fob could stop working due to a variety reasons. The most commonly cited reason for key fob failure is a dead coin battery. Other reasons include water damage, a faulty receiver module, and signal interference. Dead Coin Battery Replace the battery if your key fob has died. Make use of a button cell battery that has the same voltage, size and specifications as the old one. If the key fob has been exposed to water, for example a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. The best way to do this is using an old towel soaked in isopropyl, or electronic cleaner. If the key fob isn't working despite being not exposed to water it could be due a malfunction in the receiver module or internal electronic chip. In these situations it is possible that reprogramming the key fob with an OBDII scanner can assist. Water Damage It is possible to get water damage if your key fob was submerged in a pool, puddle or washing machine. It is usually possible to get it back in working order by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is best to let the circuit board completely dry before installing a battery. You could have a damaged module in the event that your key fob stops working after replacing the battery or updating. There are instructions for changing the programming of most remote keys on YouTube or refer to your owner's manual. You can also reset your computer of your vehicle using the OBDII scanner tool. Faulty Receiver Module The key fob has an electronic chip that communicates with the car's system. If this chip becomes damaged, it can no longer send and receive signals to the vehicle. This could be due to dropping the key fob or by exposure to water. If the key fob stopped functioning after exposure to water, it could be possible to repair it by cleaning the chip with isopropyl alcohol, or electronic cleaner. If the key fob still does not respond after cleaning it, you can be sure that the module is defective and will require to be replaced. A defective receiver module could also cause the remote control key to stop functioning. This is usually caused by electromagnetic interference. Faulty electronic chip The electronic chip in the key fob is a vital element of the anti-theft device in your car. It sends a signal the immobiliser device in the vehicle to determine whether or not the key is in fact valid. Your car will not start when the chip is damaged. A malfunctioning chip could be caused by interference signals from other objects like bad weather conditions or transmitters operating on the same frequency near your car. In this situation you'll require a new key fob. Faulty Battery Contacts The battery contacts on the key fob could be damaged due to heavy use. If they're broken or bent, the fob will not be able to send any signals to the receiver modules in the car. Modern fobs are designed with rubber seals in order to keep out water. In the event of submerging them in water, even if it's only small splash or drizzle can harm the chip's electronic circuit. The key fob has an electronic chip that communicates with the immobilizer system of the vehicle to start it. This system uses crypto coding systems in the latest vehicles or the red key system for older ones. If the chip is defective and needs to be replaced. Faulty 12 Volt Batterie A faulty battery can cause the key fob to cease working. The car's computer may not recognize the remote when this happens. Test the battery using the voltmeter before replacing it to determine its capacity. replacement fiat key charged battery should display 12.6 volts. If the reading falls significantly then it's time to replace the battery. To test a battery's capacity, place an electrical load on it for a couple of minutes. This will remove approximately 1 percent of the charge on the surface. Then, you can measure the voltage. The longer a battery is able to hold its voltage, the better its capacity. Ideal is to hold close to 12 volts for several minutes. Problems with Radio Signal This is the most typical reason for a key fob that stops sending signals to the car. This issue can be resolved by replacing the battery. It is essential to purchase a battery with the same dimensions and voltage as the original. Fobs take a lot of punishment, and aren't impervious to destruction. Contacts on batteries and buttons can be damaged through rough handling. Other transmitters or objects operating on the same frequency can interfere with the signal. For instance, a light control panel that is near your home could transmit interference using the same frequency that key fobs utilize. This can interfere with the remote control of your car. Faulty OBDII scan tool There are a variety of reasons why scanner tools may not function. Some are more complex than others. Professional scan tools permit mechanics to monitor the car's network and perform a variety of self-tests. These tools can save a lot of time, but they are costly and not accessible to most DIYers. If your OBD2 scan tool doesn't turn on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition, a fuse may have failed. This is the most common cause of scan tool failure. It is typically easy to fix the issue by replacing the fuse that has blown.