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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 start the motor. However, the fob may stop working for several reasons. A dead battery for the coin is the most frequent reason for the malfunction of a key fob. Other causes include water damage malfunctioning receiver modules and signal interference. Dead Coin Battery If your key fob battery has died, the first thing to do is replace it. Choose fiat 500 key cover with the same voltage, size and specifications as the original. If the key fob has been exposed to water, such as a splash of rain or salt water at the beach, it will have to be cleaned before it can be used again. The best way to do this is using a paper towel soaked with isopropyl, or electronic cleaner. If the key fob is not working despite not being exposed water it could be due to a problem in the receiver module or an internal electronic chip. In these cases it is possible to re-programme the key fob using an OBDII scanner can help. Water Damage If your key fob's battery has taken a bath in the puddle or pool or even a trip down the wash machine, you may have some water damage. You can usually get it back to working by removing the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the fob completely dry before putting in a battery. If your key fob isn't working, even after replacing the battery and reconfiguring it, you may have a faulty receiver module. You can find instructions for reprogramming most vehicles' remote keys on YouTube or refer to your owner's manual. You could also try resetting the car's onboard computer with the OBDII scan tool. Faulty Receiver Module The key fob's chip is the chip that communicates the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. Dropping the key fob could cause this, as well as exposure to water. If the key fob stops working after exposure to water, it may be possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol or an electronic cleaner. However, if the key fob does not respond after cleaning it, it is likely that the module is defective and will need to be replaced. A malfunctioning receiver module could also cause the remote control key to not function. This usually happens due to electromagnetic interference. Faulty electronic chip The chip that is embedded in your key fob is a crucial component of the anti-theft systems in your vehicle. It transmits a message to the immobiliser in your car to tell it whether the key is legitimate. If the chip is damaged or broken, your vehicle will not start. A defective chip can be caused by interference signals from objects, bad weather conditions or transmitters on the same frequency close to your vehicle. In this situation you'll need an entirely new key fob. Contacts with the battery may be damaged. The battery contacts on the key fob are delicate and may be damaged when used for long periods of time. If they are bent, or damaged, the fob will not transmit any signals to receiver modules inside the vehicle. Modern fobs are equipped with rubber seals that keep out water. Immersing them in water, even if just small splash or drizzle could damage the electronic chip. The key fob has an electronic chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system relies on cryptocoding systems in newer vehicles, or the old red key system in older ones. This chip will have to be replaced if it's faulty. A faulty 12 Volt battery A damaged battery can cause the remote to stop working. The car's system will not recognize the remote if this happens. Test the battery with a voltmeter before replacing it to determine its capacity. A fully charged battery will read 12.6 volts. If the reading drops significantly, it is time to replace the battery. To test the battery's power put an electrical load on it for a couple of minutes. This will remove approximately 1% of the surface charge. Then, you can measure the voltage again. The longer the battery can hold its voltage more effectively, the greater its capacity. Ideal is that it stays close to 12 volts for several minutes. The radio signal is not working properly. Radio Signal This is the main reason for a key fob that stops sending signals to the car. This problem can be solved by replacing the battery. However, it is important to buy a new battery that is the same size and voltage as the original. Fobs aren't impervious to damage and can withstand a lot. The battery buttons and contacts are brittle which means they could be bent or broken with excessive use. Other transmitters or objects using the same frequency can disrupt the signal. For instance, a light-control panel that is near your home could transmit interference on the same bandwidth that key fobs use. This could cause interference with your car's remote control. Afflicted OBDII Scan Tool There are many reasons why a scanner could not function. Some are more complex than others. Professional scan tools enable mechanics to examine the car's systems and run a range of self-tests. They can be huge time savers, but they can also be very expensive, and beyond the budget of most DIYers. If your OBD2 scanner won't turn on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK, a fuse may have been blown. This is the most typical reason for failure of the scan tool. The easiest solution is to replace the fuse which has blown.