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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends an indication from the fob to the car to unlock doors or turn on the motor. However, the key fob may stop working due to a variety of causes. The most commonly cited reason for key fob malfunction is an inoperable coin battery. Other causes are water damage, malfunctioning receiver modules, and signal interference. Dead Coin Battery Replace the battery if the key fob has died. Choose a button battery with the same voltage, size, and specifications as the previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) It must be cleaned prior to using it again. The trick is to use an old towel soaked in isopropyl, or electronic cleaner. If the key fob has not been exposed to water but it is still not working it could be because of an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these cases. Water Damage If your key fob took submerged in a pool or puddle or gone to the washing machine, you may have some water damage. It is usually possible to get it working again by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's a good idea to allow the fob to dry completely before installing a new battery. It could be that you have a defective module when your key fob ceases working after replacing the battery or replacing it with. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer with the OBDII scan tool. Faulty Receiver Module The key fob contains the chip that communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if it becomes damaged. Dropping the key fob could result in this, as can exposure to water. If the key fob stopped working after exposure to water, it may be possible to repair it by cleaning the chip using isopropyl alcohol or an electronic cleaner. If the key fob doesn't respond to cleaning, it is possible that the component has an issue and should be replaced. A damaged receiver can cause the key to not work. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip inside your key fob is a vital function in the anti-theft security system of your vehicle. It sends a signal the immobiliser device in the vehicle to determine whether or not the key is legitimate. If the chip is damaged or damaged, your car will not start. A faulty chip may also be caused by interference from objects, bad weather or transmitters located near your vehicle. In this scenario the replacement fob will be required. Contacts for the battery that are damaged The battery contacts of the key fob could be damaged by excessive usage. If they're damaged or bent, the key fob will not transmit any signals to the receiver modules inside the car. Modern fobs come with rubber seals to keep out water. Immersing them in water, even if it's just the slightest splash or drizzle could damage the electronic chip. The key fob houses a chip that communicates with the vehicle's immobilizer to allow it to begin it. This system utilizes cryptocoding systems in modern vehicles, or the old red key system used in older ones. This chip will have to be replaced if damaged. Problematic 12 Volt Battery A damaged battery could cause the key fob to work. If this happens the car's computer cannot recognize that the remote is inside the vehicle. Test the battery using a voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly the time is now to replace it. Put an electrical load for a few seconds on the battery to check its capacity. This will eliminate about 1 percent of the charge on the surface. Then, test the voltage once more. The longer a battery is able to hold its voltage more effectively, the greater its capacity. Ideally, it should remain close to 12 volts several minutes. Faulty Radio Signal This is the main cause of a key fob that stops sending signals to the car. The battery can be replaced to fix this problem. However, it is crucial to select a replacement battery that is the same voltage and size as the original. Fobs take a lot of punishment, and aren't impervious to destruction. The battery contacts and buttons could be damaged by rough handling. A signal can also be interrupted by other transmitters or objects that use the same frequency. For instance, a lighting control panel that is near your home could send interference on the same frequency as key fobs utilize. This can interfere with your car's remote control. Problems with OBDII Scan Tool There are many reasons scanners don't perform. Some are more complex than others. read what he said enable mechanics to observe the car's network and run various self-tests. These can be real time savers, however they are also extremely expensive, and beyond the range of most DIYers. If your OBD2 scanner won't turn on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are OK, it's likely that a fuse has blown. This is one of the most common causes of scan tool failure. The simple fix is usually to replace the fuse which has blown.