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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends a signal to your car to unlock the doors or start the engine. However, the fob may stop working for several reasons. A dead battery for the coin is the most frequent cause of key fob malfunctions. Other causes include water damages or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery in case your key fob is dead. Use a button cell with the same voltage, size and specifications as your previous one. If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. The best way to do this is using the paper towel and soak it in isopropyl, or electronic cleaner. If the key fob hasn't been exposed to water, but it is still not working it could be because of an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob with an OBDII scan may assist in these situations. Water Damage If your key fob took an immersion in the puddle or pool, or taken a trip through the washing machine, it could have some water damage. It is usually possible to get it working again by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It is best to let the circuit board completely dry prior to installing the battery. There could be a problem with the module if 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 your car's computer using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with a chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. This can be caused by dropping the key fob or by water exposure. If the key fob stopped functioning after exposure to water, it is possible to fix it by cleaning the chip with isopropyl ethanol or electronic cleaner. If the key fob does not respond to cleaning, it's likely that the module is in a fault and needs to be replaced. A faulty receiver can also cause the key to stop working. This is usually due to electromagnetic interference. A defective electronic chip The chip inside your key fob is a vital part in the anti-theft security system in your car. It transmits a message the immobiliser in your car to tell it that the key is valid. The car won't start if the chip is damaged. A malfunctioning chip could be caused by interference signals from other objects like bad weather conditions or transmitters operating on the same frequency in close proximity to your car. In this situation the replacement fob will be needed. Contacts for the battery that are damaged The battery contacts of the key fob are fragile and are susceptible to damage by repeated use. If they are bent, or damaged, the fob will not send any signals to the receiver modules inside the vehicle. Modern fobs are constructed with rubber seals to keep out water. A splash of water or light rain is fine however, submerging them in saltwater may cause damage to the chip's electronic components. The key fob has chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system is based on the old red keys in older vehicles as well as the cryptocoding system used in the latest vehicles. If the chip is defective and needs to be replaced. Problematic 12 Volt Battery A malfunctioning battery could cause the key fob to cease to function. If this happens, the car's computer system cannot recognize that the remote is inside the vehicle. Before you replace the battery, you should test it with a an voltmeter for determining 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 the battery's capacity, place an electrical load on it for a few minutes. This will eliminate 1% of the surface charges. After that, take the voltage again. The longer the battery can hold its voltage, the better its capacity. Ideal is that it stays close to 12 volts during several minutes. Faulty Radio Signal This is the most frequent cause of a key fob that stops sending signals to the car. This issue can be resolved by replacing the battery. However, fiat punto keys is crucial to buy a new battery that has the same size and voltage as the original one. Fobs are not indestructible and can be damaged by a lot. The battery buttons and contacts are delicate which means they could be bent or broken by rough usage. The signal could also be disrupted by other objects or transmitters who use the same frequency. For instance, a light-control panel close to your home can transmit interference on the same bandwidth that key fobs utilize. This can affect the remote control of your car. Faulty OBDII Scan Tool There are many reasons scanner tools may not work. Some are more complex than others. Professional scan tools enable mechanics to monitor the car's networks and run various self-tests. These tools can save you a lot of time, but are expensive and not accessible to the majority of DIYers. If your OBD2 scanner doesn't work examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition it could be that a fuse has been blown. This is among the most common reasons for failure of the scanner. The most straightforward fix is to replace the fuse that is blowing up.