Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends signals to your car to open the doors or start the engine. However, the fob can be inoperable due to various reasons. A dead battery for the coin is the most common reason for malfunctioning keys. Other causes include water damages or a damaged module and interference signals. Dead Coin Battery If your key fob battery has failed, the initial thing to do is replace it. Use a new button cell battery that is the same voltage, size and specifications as the original. If the key fob was exposed to water (such as saltwater or rain at the beach) it must be cleaned prior to being used again. The best solution is to use an old towel soaked in isopropyl, or electronic cleaner. If the key fob doesn't working even though it is not exposed to water, it could be due to a glitch in the receiver module or internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these cases. Water Damage If your key fob has taken immersed in a pool or puddle or even a trip through the washing machine, you could be suffering some water damage. It's usually possible to get it back in working order by removing the batteries and cleaning the circuit board with ruby alcohol. It is recommended to let the fob completely dry before putting in the battery. If your key fob stopped working even after replacing the battery and programming it again, you might have a malfunctioning receiver module. You can find instructions for reprogramming most vehicles' remote keys on YouTube or consult your owner's manual. You can also reset your car's computer using the OBDII scanner tool. Faulty Receiver Module The key fob has a chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. The key fob being dropped can cause this, as well as exposure to water. If the key fob stopped working after exposure to water, it is possible to fix the issue by cleaning the chip with isopropyl alcohol, or electronic cleaner. If the key fob still does not respond after cleaning it, it is likely that the component is damaged and needs to be replaced. A damaged receiver can cause the key to not work. This is usually caused by electromagnetic interference. Faulty Electronic Chip The electronic chip inside your key fob is an important part of the anti-theft system in your car. It sends a signal to the immobiliser in your car to tell it that the key is valid. Your car won't start if the chip is damaged. A faulty chip can also be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency as your car. In this case you'll require a new key fob. Contacts for the battery that are damaged The battery contacts on the key fob are delicate and can get damaged through repeated use. If they are bent, or broken, the fob won't send any signals to the receiver modules in the vehicle. Modern fobs are designed with rubber seals to keep out water. A splash of water or light rain is fine but submerging them into salt water could damage the electronic chip. The key fob has an embedded chip that communicates to the immobilizer system of the vehicle, allowing it to start it. This system makes use of cryptocoding systems in newer vehicles as well as the traditional red key system for older models. This chip will have to be changed if it is damaged. Poor 12 Volt Battery A faulty battery may cause the key fob not to function. The car's system will not recognize the remote if this occurs. Test the battery using the voltmeter before replacing it to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls dramatically then it's time to replace the battery. Install an electrical charge for a few seconds on the battery to gauge its capacity. This will eliminate 1percent of the charges. Then, you can measure the voltage. The higher the capacity of the battery and the longer it can maintain its voltage. The ideal scenario is to keep it close to 12 volts for several minutes. Faulty Radio Signal This is the most common reason for a keyfob that stops sending signals to the car. This issue can be fixed by replacing the battery. It is crucial to buy a battery that has the same dimensions and voltage as the original. Fobs are not indestructible and can take a lot. The battery contacts and buttons are delicate and can be bent or damaged from rough use. Other transmitters or objects operating on the same frequency may also interfere with a signal. A light-control panel at your home, for instance can interfere with key fobs which use the same bandwidth. This could cause interference with the remote control in your car. Afflicted OBDII Scan Tool There are a number of reasons why a scan tool may not work. Certain are more complicated than others. https://www.thekeylab.co.uk/fiat-car-keys/ enable mechanics to look over the car's networks and run various self-tests. These are real time savers, however they can also be very expensive, and out of the budget of most DIYers. If your OBD2 scanner won't start make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present the chances are that a fuse is blowing. This is among the most common causes of a scan tool failing. The easiest fix is to replace the fuse which has blown.