Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that transmits a signal from the fob to the car to unlock doors or turn on the motor. The fob could stop working for a variety of reasons.
A dead battery for the coin is the most frequent reason for malfunctioning keys. Other causes include water damage, malfunctioning receiver modules, and signal interference.
Dead Coin Battery
Replace the battery if your key fob has died. Use a brand new button battery that has the same size, voltage, and specification like 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. The best method is to use an old towel soaked in isopropyl, or electronic cleaner.
If the key fob doesn't working despite not being exposed to water, it could be due to a malfunction in the receiver module or an internal electronic chip. In these instances, reprogramming the key fob with an OBDII scanner could help.
Water Damage
If your key fob's battery has taken submerged in a pool or puddle or gone to the washing machine, you may have some water damage. It's possible to get it back in working order by getting rid of the batteries and cleaning the circuit board with ruby alcohol. It's a good idea let the fob dry completely before putting in a brand new battery.
If your key fob has stopped working even after replacing the battery and changing the program, you could have a malfunctioning receiver module. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's guide. You can also reset the computer of your car using the OBDII scanner tool.
Faulty Receiver Module
The key fob's chip is a chip that connects to the vehicle's system. If the chip is damaged, it will no longer be able to send or receive signals to the vehicle. Dropping the key fob can cause this, as can exposure to water. If your key fob has stopped working due to water exposure or water exposure, you might be able fix the issue if you clean the chip with electronic cleaner or isopropylethanol.
If the key fob continues to not respond after cleaning it then it is likely that the receiver module is not functioning properly and needs to be replaced. A damaged receiver module may also cause the remote control key to not function. This is typically caused by electromagnetic interference.
A defective electronic chip
The electronic chip that is in your key fob plays an important role in the anti-theft security system of your vehicle. It sends a signal to the immobiliser unit of your car to determine whether or not the key is in fact valid. Your car will not start when the chip is damaged.
A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this case you'll need an entirely new key fob.
Faulty battery contacts
The battery contacts on the key fob are delicate and can get damaged when used for long periods of time. If they're damaged or bent, the key fob will not be able to send any signals to the receiver modules inside the car.
Modern fobs come with rubber seals in order to keep out water. A splash of water or light rain should be fine but submerging them into saltwater could cause damage to the chip's electronic components.
The key fob has an electronic chip that communicates with the immobilizer system of the vehicle to begin it. This system uses crypto coding systems in newer vehicles or the red key system used in older ones. This chip needs to be replaced if faulty.
Problematic 12 Volt Battery
A faulty battery may cause the key fob to work. The car's computer will not recognize the remote when this occurs.
Before replacing the battery, test it using a an voltmeter to gauge its capacity. A fully charged battery will display 12.6 volts. If the reading drops significantly, it is time to replace the battery.
Install an electrical charge for a few seconds on the battery to test its capacity. This will eliminate one percent of the surface charges. Then, test the voltage again. The longer a battery is able to keep its voltage steady greater is its capacity. Ideally, it will remain close to 12 volts several minutes.
Faulty Radio Signal
This is the main reason for the key fob not sending signals to the car. The battery could be replaced to fix this issue. It is however important to purchase a battery with the same size and voltage as the original.
Fobs aren't indestructible and can take a lot. Contacts and buttons on batteries can be damaged through rough handling.
The signal could also be affected by other objects or transmitters that use the same frequency. A light-control system in your home, for example can interfere with key fobs that have the same frequency. This could cause interference with the remote control in your car.
Incorrect OBDII scan tool
There are many reasons why a scanner may not work. fiat punto key are more complex than others.
Professional scan tools allow mechanics to monitor the car's network and run a variety of self-tests. These tools can save you a lot of time, but they're expensive and are out of reach for the majority of DIYers.
If your OBD2 scan tool fails to turn on, check voltage at terminals 16 (scantool power) and 4 (chassis earth). If they are all OK it could be that a fuse has failed. This is the most common cause of scan tool failure. The easiest solution is to replace the fuse which has blown.