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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits an alert to your car to open the doors and start the engine. The fob could stop working for a variety of reasons. The most commonly cited reason for key fob malfunction is an inoperable coin battery. Other causes are water damage, an inoperative receiver module, and signal interference. Dead Coin Battery Replace the battery if your key fob has failed. Use a button cell battery with the same voltage, size, and specifications as the previous one. If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it needs to be cleaned before it is able to be used again. A paper towel soaked in alcohol or electronic cleaner can be the solution. If the key fob has not been exposed to water, but still does not work it could be due to a problem with the receiver module or an internal electronic chip. In these cases it is possible that reprogramming the key fob using an OBDII scanner might assist. Water Damage You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It's possible to fix it by taking out the batteries and cleaning the circuit board with rubbing alcohol. It's best to let the circuit board completely dry before installing batteries. If your key fob stopped working, even after replacing the battery and reprogramming it, you may have a defective receiver module. You can find reprogramming instructions for most 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 has a chip that communicates with the car's system. The chip will stop sending and receiving signals to the car if it becomes damaged. A key fob falling off can cause this, as could exposure to water. If the key fob stops working after water exposure it may be possible to fix the issue by cleaning the chip with isopropyl alcohol or electronic cleaner. If the key fob is still unable to not respond after cleaning it, it is likely that the receiver module is not functioning properly and must be replaced. A faulty receiver can also cause the key to stop working. This is usually caused by electromagnetic interference. A defective electronic chip The electronic chip in your key fob plays a vital role in the anti-theft system in your car. It sends a signal to the immobiliser in your car that tells it whether the key is legitimate. The car won't start if the chip is damaged. A faulty chip can also be caused by interference signals from other objects such as weather conditions, objects or transmitters on the same frequency close to your car. In this case the replacement fob will be required. Contacts of the battery may be damaged. The battery contacts of a key fob are very delicate and may be damaged when used for long periods of time. If they're bent or damaged, the fob will not transmit any signals to receiver modules in the vehicle. Modern fobs come with rubber seals in order to keep out water. In the event of submerging them in water, even if it's just small splash or drizzle could harm the electronic chip. The key fob contains the chip that connects to the vehicle's immobilizer system to begin it. This system utilizes cryptocoding systems in newer vehicles as well as the traditional red key system in older models. If the chip is damaged and needs to be replaced. Poor 12 Volt Battery A faulty battery can cause the key fob to cease to function. When this happens the car's computer will not 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 then it's time to replace the battery. To test a battery's capacity test the battery's capacity by placing an electrical load on it for a few minutes. This will eliminate one percent of the surface charges. Then, you can measure the voltage once more. The higher the capacity of the battery and the longer it can maintain its voltage. Ideal is to hold close to 12 volts over several minutes. Radio Signal Faulty Radio Signal This is the most typical reason for the key fob not sending signals to a car. This issue can be resolved by replacing the battery. It is essential to purchase a battery that has the same voltage and dimensions as the original. Fobs endure a lot of abuse, but they're also not indestructible. The battery contacts and buttons could be damaged through rough handling. Other transmitters or objects operating on the same frequency could also disrupt a signal. A light-control panel in your home, for example could interfere with key fobs which use the same bandwidth. This could cause interference with the remote control of your car. Afflicted OBDII Scan Tool There are a number of reasons why a scanner could not work. Some are more complicated than others. Professional scan tools enable a mechanic observe the car's network and run various self-tests. These can be real time savers, but they can also be very expensive, and out of the reach of most DIYers. If your OBD2 scan tool fails to turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If thekeylab.co.uk are OK the chances are that a fuse has blown. This is the most frequent reason for failures of the scanner. The simple fix is usually to replace the blown fuse.