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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends signals from the fob to the car in order to unlock doors or turn on the motor. However, the fob may not function due to a variety of reasons. A dead battery for the coin is the most frequent cause of a key fob malfunction. Other causes are water damage, a faulty receiver module, and signal interference. The Keylab If your key fob battery has gone out of service, the first thing to do is replace it. Choose a button battery with the same voltage, size, 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 prior to using it 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 it is still not working it could be an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob using an OBDII scan can help in these cases. Water Damage It is possible to get water damage to your key fob if it was submerged in a pool, puddle or washing machine. It's usually possible to be able to get it back up and running by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is recommended to let the board completely dry prior to installing the battery. There could be a problem with the module in the event that your key fob stops working after replacing the battery or updating. There are instructions for reprogramming most vehicles' remote keys on YouTube or consult your owner's manual. You can also reset the computer in your car with the OBDII scanner tool. Faulty Receiver Module The key fob's chip is a chip that communicates with the vehicle's system. If this chip becomes damaged, it can no longer transmit and receive signals to the vehicle. The key fob being dropped can cause this, as can water exposure. If the key fob stops working after exposure to water, it may be possible to repair it by cleaning the chip using isopropyl alcohol or an electronic cleaner. If the key fob does not respond to cleaning, it is possible that the receiver module has an issue and must be replaced. A malfunctioning receiver could cause the key to cease to function. This usually happens due to electromagnetic interference. Faulty Electronic Chip The electronic chip that is in your key fob plays a vital role in the anti-theft system of your car. It sends a message to the immobiliser inside your car that tells it if the key is valid. Your car will not start in the event that the chip has been damaged. A malfunctioning chip can be caused by interference from objects, bad weather or transmitters near your vehicle. In this scenario, a new fob will be needed. Contacts for the battery that are defective The battery contacts on the fob's battery can be damaged by excessive usage. If they're damaged or bent, the fob will not send any signals to the receiver modules in the car. Modern fobs are constructed with rubber seals that keep out water. A splash of water or a light rain is acceptable however, submerging them in saltwater can cause damage to the electronic chip. The key fob comes with an embedded chip that communicates to the immobilizer system of the vehicle, allowing it to start it. This system uses crypto coding systems in the latest vehicles and the older red key system for older models. This chip will have to be changed if it is defective. A faulty 12 Volt battery A defective battery can cause the remote to cease to function. When this occurs, the car's computer system will not be able to recognize that the remote is inside the vehicle. Test the battery using an voltmeter prior to replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly it is time to replace the battery. To test a battery's capacity to determine its capacity, put an electric load on it for a couple of minutes. This will take away about 1% of the charge on the surface. Then, you can measure the voltage. The longer a battery can hold its voltage greater is its capacity. It should be at or near 12 volts for several minutes. Faulty Radio Signal This is the main reason behind a key fob that stops sending signals to the car. The issue can be fixed by replacing the battery. It is essential to purchase a battery with the same voltage and dimensions as the original. Fobs are not indestructible and can withstand a lot. The battery buttons and contacts are delicate, so they can get bent or broken by rough use. A signal can also be interrupted by other objects or transmitters which use the same frequency. A light-control panel at your home, for example, may interfere with key fobs using the same frequency. This can interfere with the remote control in your car. Afflicted OBDII scan tool There are many reasons why a scan tool may not work. Certain are more complicated than others. Professional scan tools let mechanics to monitor the car's network, and run various self-tests. These are real time savers, however they can be expensive and are out of the budget of most DIYers. If your OBD2 scan tool isn't turning on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition, a fuse may have blown. This is the most common reason for failures of the scanner. It is typically easy to fix the problem by replacing the blown fuse.