Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip which sends the signal to your vehicle to unlock the doors or start the engine. However, the fob could stop working due to a variety of causes. https://www.thekeylab.co.uk/fiat-car-keys/ cited reason for key fob failure is an inoperable coin battery. Other causes include water damage as well as a defective module and interference signals. Dead Coin Battery Replace the battery if the key fob is dead. Use a new button cell battery that has the same voltage, size and specification as the original. If the key fob was exposed to water, like a splash of rain or salt water on the beach, it's going to need to be cleaned before it can be used again. The trick is to use the paper towel and soak it in isopropyl or an electronic cleaner. If the key fob has not been exposed to water but it is still not working it could be due to an issue with the receiver module or an internal electronic chip. In these situations it is possible to re-programme the key fob with an OBDII scanner might assist. Water Damage There could be water damage if your key fob was submerged in a pool, puddle or washing machine. You can usually get it back to working by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is best to let the fob completely dry prior to installing batteries. If your key fob isn't working, even after replacing the battery and changing the program, you could have a malfunctioning receiver module. You can find reprogramming instructions for all vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with a chip that communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if damaged. Dropping the key fob could cause this, as could exposure to water. If your key fob stopped working due to water exposure or water exposure, you might be able to fix it if clean the chip with electronic cleaner or isopropyl alcohol. If the key fob doesn't respond to cleaning, it is possible that the module has an issue and must be replaced. A defective receiver module could also cause the remote control key to not function. This is typically caused by electromagnetic interference. Faulty Electronic Chip The electronic chip that is in your key fob plays a crucial role in the anti-theft system in your car. It sends a signal to the immobiliser device in your car to determine whether the key is genuine. If the chip is damaged or broken, your car won't start. A malfunctioning chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency close to your car. In this situation, a new fob will be needed. Contacts with the battery may be damaged. The battery contacts of the key fob could be damaged through heavy use. If they're bent or broken, the fob won't transmit any signals to receiver modules in the vehicle. Modern fobs are made with rubber seals that keep out water. A splash of water or light rain should be fine, but submerging them in salt water could cause damage to the chip's electronic components. The key fob is equipped with a chip that communicates with the vehicle's immobilizer system to activate it. This system uses crypto coding systems in the latest vehicles and the older red key system used in older ones. If the chip is damaged it will have to be replaced. Faulty 12 Volt Batterie A faulty battery can cause the key fob to cease to function. The car's computer won't recognize the remote if this happens. Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If the reading drops dramatically, it's time to replace it. To test the battery's power to determine its capacity, put an electric load on it for a few minutes. This will take off about 1 percent of the surface charge. After that, measure the voltage. The longer the battery can hold its voltage, the better its capacity. It should be at 12 volts or less for several minutes. Problems with Radio Signal This is the most common reason for the key fob to stop sending signals to a car. The battery can be replaced to fix this issue. It is crucial to purchase a battery that has the same voltage and dimensions as the original. Fobs endure a lot of punishment, and aren't indestructible. The battery buttons and contacts are delicate and can be bent or broken by rough usage. A signal may also be impacted by other objects or transmitters that operate on the same frequency. A light-control panel at your home, for instance can interfere with key fobs using the same frequency. This could interfere with the remote control of your car. Faulty OBDII scan tool There are many reasons why scanners don't work. Certain are more complicated than others. Professional scan tools enable mechanics to examine the car's systems and perform a variety of self-tests. These tools can save time, but are costly and out of reach for the majority of DIYers. If your OBD2 scan tool isn't turning on, make sure you check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're all fine, a fuse may have been blown. This is among the most frequent causes of a scan tool failing. The easiest solution is to replace the blown fuse.