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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder that transmits a signal from the fob to the car to unlock doors or turn on the motor. The fob might stop working for a variety. A dead battery for the coin is the most frequent reason for the malfunction of a key fob. Other causes are water damage, an inoperative receiver module, and signal interference. Dead Coin Battery If your key fob battery has gone out of service, 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 has been exposed to water, like a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner will help. If the key fob has not been exposed to water but it is still not working it could be due to an issue with the receiver module or an internal electronic chip. In these cases you can reprogramme the key fob using an OBDII scanner can assist. Water Damage If your key fob took immersed in a puddle or pool, or taken a trip through the washing machine, you may have some water damage. You can usually get it back to working by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to let the board completely dry before putting in the battery. If your key fob isn't working even after replacing the battery and reconfiguring it, you may have a problem with the receiver module. You can find the instructions for reprogramming most vehicles' remote keys on YouTube or in your owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob contains an electronic chip that communicates with the car's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. Dropping the key fob could result in this, as can exposure to water. If your key fob isn't functioning due to exposure to water and you are unable fix the issue if you clean the chip with electronic cleaner or isopropyl ethanol. If the key fob won't respond to cleaning, it's possible that the receiver module has a fault and needs to be replaced. A defective receiver module could also cause the remote control key to stop functioning. This usually happens due to electromagnetic interference. Faulty electronic chip The electronic chip in the key fob is an essential element of the anti-theft device in your vehicle. It transmits a message to the immobiliser inside your car that tells it whether the key is legitimate. Your car will not start in the event that the chip has been damaged. A defective chip could be caused by interference caused by objects, bad weather or transmitters close to your vehicle. In this instance you'll require an entirely new key fob. Contacts to the battery are not working properly. The battery contacts of the key fob are delicate and may be damaged with hard usage. If they are damaged or bent, the key fob will not transmit any signals to the receiver modules in the car. Modern fobs come with rubber seals that block out water. A splash of water or light rain is fine however, submerging them in salt water could damage the electronic chip. The key fob has an electronic chip that communicates with the vehicle's immobilizer system in order to start it. The system relies on cryptocoding systems in modern vehicles and the older red key system used in older ones. The chip must be replaced if damaged. Faulty 12 Volt Battery A faulty battery may cause the key fob not to work. The car's computer will not recognize the remote if this occurs. Before you replace 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 the battery. To test the battery's capacity, place an electrical load on it for a few minutes. This will eliminate 1% of the surface charges. Then, measure the voltage again. The higher the capacity of the battery and the longer it can keep its voltage. The ideal is to keep it close to 12 volts during several minutes. Problems with Radio Signal This is the most typical cause of a key fob that stops sending signals to the car. This issue can be fixed by replacing the battery. It is crucial to buy an identical battery voltage and dimensions as the original. Fobs are subject to a lot of abuse, but they're also not impervious to destruction. Contacts on batteries and buttons can be damaged through rough handling. Other transmitters or objects that use the same frequency may also interfere with a signal. For instance, a lighting control panel in your home could send interference on the same frequency that key fobs utilize. This can interfere with the remote control of your car. Problems with OBDII Scan Tool There are many reasons scanners may not perform. Some are more complex than others. Professional scan tools let mechanics to observe the car's network, and run various self-tests. These can be real time savers but they can also be very expensive, out of the range of most DIYers. If your OBD2 scan tool isn't turning on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If these are OK it's likely that a fuse is blowing. fiat replacement key is the main reason for a scan tool to fail. The easiest fix is to replace the fuse that is blowing up.