Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder that sends an indication from the fob to the car to unlock doors or turn on the motor. However, the fob may stop working for several reasons. The most common reason for key fob malfunction is an inoperable coin battery. Other reasons include water damage, a faulty receiver module and signal interference. Dead Coin Battery If your key fob's battery is dead, the first step is to replace it. Use a new button cell battery with identical in size, voltage and specifications as the previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) it should be cleaned before being used again. A paper towel soaked with isopropyl alcohol or electronic cleaner can be the solution. If the key fob has not been exposed to water but remains inoperable it could be due to a problem with the receiver module or an internal electronic chip. In these instances it is possible that reprogramming the key fob with an OBDII scanner might assist. Water Damage If your key fob has taken an immersion in the pool or puddle or walked down the washing machine, you could be suffering some water damage. It's possible to repair it by getting rid of the batteries and cleaning the circuit board using rubbing alcohol. It is best to let the circuit board completely dry before putting in batteries. You could have a damaged module when your key fob ceases working after replacing the battery or replacing it with. You can find information on reprogramming most vehicles' remote keys on YouTube or refer to the owner's manual. You could also try resetting the car's onboard computer by using the OBDII scan tool. Faulty Receiver Module The key fob contains a chip that communicates with the vehicle's system. https://www.thekeylab.co.uk/fiat-car-keys/ will stop sending and receiving signals to the car when it is damaged. A key fob falling off can cause this, as could exposure to water. If the key fob has stopped functioning after exposure to water, it could be possible to repair it by cleaning the chip using isopropyl alcohol or electronic cleaner. If the key fob does not respond to cleaning, it's likely that the module is in a fault and needs to be replaced. A malfunctioning receiver module could also cause the remote control key to stop working. This is usually due to electromagnetic interference. A defective electronic chip The chip that is embedded in your key fob is an important element of the anti-theft device in your car. It sends a signal to the immobiliser inside your car to inform it whether the key is genuine. If the chip is damaged or damaged, your car won't start. A malfunctioning chip could be caused by interference signals from objects or weather conditions that are bad, or transmitters on the same frequency in close proximity to your car. In this instance the replacement fob will be required. Contacts to the battery are not working properly. The battery contacts of the key fob could be damaged by heavy usage. If they are broken or bent, the fob will not send any signals to the receiver modules in the car. Modern fobs come with rubber seals to keep out water. A splash of water or a light rain is acceptable however, submerging them in saltwater can damage the chip's electronic components. The key fob contains chips that communicate with the vehicle's immobilizer in order to allow it to start. This system uses crypto coding systems in vehicles that are more modern as well as the traditional red key system for older ones. If the chip is damaged, it will need to be replaced. Faulty 12 Volt Batterie A malfunctioning battery could cause the remote to cease working. If this happens, the car's computer system cannot recognize that the remote is in the vehicle. Test the battery with a voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly, it is time to replace the battery. To test the battery's capacity test the battery's capacity by placing an electrical load on it for a few minutes. This will take away 1percent of the charges. Then take another measurement of the voltage. The longer a battery is able to keep its voltage steady, the better its capacity. It is ideal to maintain close to 12 volts over several minutes. The radio signal is not working properly. Radio Signal This is the most common reason for the key fob not sending signals to vehicles. This problem can be solved by replacing the battery. But, it is essential to buy a new battery that is the same size and voltage as the original one. The buttons are not impervious to destruction and are susceptible to damage. The battery contacts and buttons could be damaged by rough handling. A signal can also be affected by other objects or transmitters that operate on the same frequency. A light-control system in your home, for example could interfere with key fobs which use the same bandwidth. This could interfere with the remote control in your car. The tool is not working properly. OBDII scan tool There are many reasons why scanners may not perform. Some are more complex than others. Professional scan tools allow mechanics to look over the car's networks and run a range of self-tests. These tools can help save time, but they're expensive and are out of reach for most DIYers. If your OBD2 scanner isn't turning on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition there is a chance that a fuse has failed. This is among the most frequent causes of scan tool failure. The easiest fix is to replace the fuse that has been blown.