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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip which sends the signal to your vehicle to open the doors and start the engine. The fob might stop working for a variety. A dead battery for the coin is the most frequent cause of key fob malfunctions. Other causes include water damage an inoperative receiver module and signal interference. Dead Coin Battery Replace the battery if your key fob has failed. Use a button cell battery with the same voltage, size and specifications as your previous one. If the key fob has been exposed to water, for example a splash of rain or salt water at the beach, it needs to be cleaned before it is able to be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner can do the trick. If the key fob hasn't been exposed to water, but still does not work, there may be an issue with the receiver module or an internal electronic chip. In these instances, reprogramming the key fob using an OBDII scanner can aid. Water Damage You might have water damage to your key fob if it was submerged in a pool, puddle or washing machine. You can usually restore it's functionality by removing the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the fob dry completely before putting in a brand new battery. You may have a faulty module when your key fob ceases working after replacing the battery or reprogramming. You can find reprogramming procedures for all vehicles' remote key fobs on YouTube or in the owner's guide. You could also try resetting the car's onboard computer using the OBDII scan tool. The Keylab contains a chip that connects to the vehicle's system. This chip will stop sending and receiving signals to the car if damaged. Dropping the key fob can cause this, as well as exposure to water. If your key fob isn't functioning due to water exposure it is possible to fix it if you clean the chip using electronic cleaner or isopropyl alcohol. If the key fob doesn't respond to cleaning, it is possible that the module has a fault and needs 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 inside your key fob is a vital role in the anti-theft security system in your car. It sends a signal the immobiliser unit inside your car to inform it whether the key is legitimate. If the chip is damaged or broken, your car will not start. A faulty chip may also be caused by interference caused by objects, bad weather or transmitters near your vehicle. In this scenario, you will need a new key fob. Contacts with the battery may be damaged. The battery contacts in a key fob are very delicate and could be damaged when used for long periods of time. If they're damaged or bent, the key fob will not send any signals to the receiver modules in the car. Modern fobs are constructed with rubber seals in order to keep out water. Submerging them in water even if it's only small splash or drizzle could damage the electronic chip. The key fob contains an electronic chip that communicates with the vehicle's immobilizer to allow it to start it. It uses the old red keys in older vehicles, or the cryptocoding system used in newer cars. This chip needs to be replaced if defective. Problematic 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 using the help of a voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If the reading falls significantly, it's time to replace it. To test a battery's capacity put an electrical load on it for a few minutes. This will eliminate approximately 1 percent of the charge on the surface. Then, measure the voltage again. The longer a battery can keep its voltage steady, the better its capacity. It should be at or near 12 volts for several minutes. The radio signal is not working properly. Radio Signal This is the most typical reason for the key fob not sending signals to a car. The battery could be replaced to fix this problem. But, it is essential to choose a battery with the same voltage and size as the original. Fobs are subject to a lot of abuse, and they aren't indestructible. The battery buttons and the contacts are fragile, so they can get bent or damaged by rough use. Other transmitters or objects that use the same frequency could also disrupt a signal. For instance, a light-control panel that is near your home could transmit interference on the same frequency as key fobs utilize. This can interfere with the remote control of your car. The tool is not working properly. OBDII scan tool There are a variety of reasons why scanner tools may not function. Some are more complex than others. Professional scan tools permit mechanics to observe the car's networks and run a range of self-tests. These are great time savers, but they're also expensive, and beyond the budget of most DIYers. If your OBD2 scanner isn't turning on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition it could be that a fuse has failed. This is among the most common causes of a scan tool failing. The easiest solution is to replace the fuse that has been blown.