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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 or start the engine. The fob may stop working due to a variety reasons. The most common cause of key fob malfunction is the battery of the coin is dead. Other causes include water damage a faulty receiver module and signal interference. Dead Coin Battery Replace the battery in case your key fob has gone out of service. Use a brand new button battery with identical in size, voltage, and specification as the original. If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it's going to need to be cleaned before it is able to be used again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will do the trick. If the key fob isn't working despite being not exposed to water, it could be due to a problem in the receiver module or internal electronic chip. In these situations it is possible to re-programme the key fob using an OBDII scanner might aid. Water Damage If your key fob took immersed in a pool or puddle or gone down the washing machine, you could be suffering some water damage. It's usually possible to fix it by getting rid of the batteries and cleaning the circuit board with rubbing alcohol. It's best to allow the device to completely dry before putting in batteries. If your key fob stopped working even after replacing the battery and programming it again, you might have a problem with the receiver module. Reprogramming instructions are available for most vehicles' remote key fobs on YouTube or in the owner's manual. www.thekeylab.co.uk could also try resetting the car's onboard computer with the OBDII scan tool. Faulty Receiver Module The key fob is equipped with a chip which communicates with the vehicle's system. If this chip becomes damaged, it cannot longer be able to send or receive signals to the vehicle. Dropping the key fob could result in this, as can exposure to water. If the key fob is not working after exposure to water, it could be possible to fix it by cleaning the chip with isopropyl ethanol or electronic cleaner. However, if the key fob still does not respond after cleaning it, you can be sure that the module is defective and must be replaced. A damaged receiver can cause the key to stop working. This is typically caused by electromagnetic interference. Faulty electronic chip The chip inside your key fob is a vital role in the anti-theft system of your car. It sends a signal the immobiliser unit of your car to determine whether or not the key is legitimate. Your car won't start when the chip is damaged. A malfunctioning chip can be caused by interference from objects, bad weather or transmitters in the vicinity of your vehicle. In this case it is likely that a new fob would be required. Contacts with the battery may be damaged. The battery contacts of the fob's battery can be damaged due to heavy use. If they are bent or broken the fob will not be able to send any signals to the receiver modules in the car. Modern fobs are designed with rubber seals in order to keep out water. In the event of submerging them in water, even if it's just the slightest splash or drizzle, can damage the electronic chip. The key fob contains a chip which communicates with the immobilizer system of the vehicle in order to start it. The system utilizes the old red keys in older vehicles as well as the crypto coding system in newer vehicles. The chip must be replaced if faulty. Problematic 12 Volt Battery A damaged battery can cause the key fob to cease working. The car's system will not recognize the remote if this occurs. Before replacing the battery, you should test it with a an voltmeter to gauge its capacity. A fully charged battery should display 12.6 volts. If the reading falls dramatically then it's time to replace the battery. To test the battery's capacity put an electrical load on it for a couple of minutes. This will remove 1% of the surface charges. After that, measure the voltage. The higher the capacity of the battery is, the longer it will keep its voltage. Ideal is that it stays close to 12 volts for several minutes. Radio Signal Faulty Radio Signal This is the most frequent reason for a keyfob that ceases to send signals to the car. The issue can be fixed by replacing the battery. However, it is important to select a replacement battery that has the same size and voltage as the original one. Fobs endure a lot of abuse, and they aren't impervious to destruction. The battery contacts and buttons are delicate, so they can get bent or broken with the force of. A signal may also be interrupted by other objects or transmitters that operate on the same frequency. For instance, a light control panel that is near your home could send interference on the same frequency as key fobs use. This can interfere with the remote control of your car. Faulty OBDII scan tool There are many reasons why scanner tools may not perform. Some are more complex than others. Professional scan tools let mechanics to look over the car's network and perform various self-tests. These tools can save a lot of time, but they are costly and not accessible to most DIYers. If your OBD2 scanner doesn't work Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are OK the chances are that a fuse has blown. This is the most common reason for failure of the scan tool. The easiest fix is to replace the blown fuse.