Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that sends signals from the fob to the car in order to unlock doors or start the motor. However, the fob could stop working for several reasons.
A dead coin battery is the most common reason for key fob malfunctions. Other causes include water damage, a faulty module, and interference signals.
Dead Coin Battery
If the battery in your key fob is dead, the first step is to replace it. Use a button cell 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 must be cleaned before being used again. The trick is to use a paper towel that has been soaked in isopropyl or electronic cleaner.
If the key fob is not working despite not being exposed to water, it could be due to a problem in the receiver module, or even in the internal electronic chip. In these situations it is possible to re-programme the key fob using an OBDII scanner may assist.
Water Damage
If your key fob's battery has taken immersed in a puddle or pool or walked down the washing machine, you could be suffering some water damage. You can usually be able to get it back up and running by removing the battery and scrubbing the circuit board with isopropyl alcohol. G28CarKeys 's a good idea let the fob dry completely before putting in a new battery.
If your key fob isn't working, even after replacing the battery and reprogramming it, you may have a problem with the receiver module. You can find information on reprograming the majority of remote keys on YouTube or consult the owner's manual. You can also try resetting the car's onboard computer with the OBDII scan tool.
Faulty Receiver Module
The key fob's chip is the chip that communicates the vehicle's system. If the chip is damaged, it will no longer transmit and receive signals to the vehicle. This could be due to dropping the key fob or by water exposure. If the key fob stopped functioning after exposure to water, it could be possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol or an electronic cleaner.
If the key fob won't respond to cleaning, it's possible that the component has an issue and must be replaced. A damaged receiver module may also cause the remote control key to stop functioning. This is usually caused by electromagnetic interference.
Faulty Electronic Chip
The electronic chip in your key fob is an essential component of the anti-theft systems in your vehicle. It transmits a message to the immobiliser in your car to determine that the key is valid. If the chip is damaged or broken, your vehicle will not start.
A defective chip can be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency as your vehicle. In this situation you'll need a new key fob.
Contacts to the battery are not working properly.
The battery contacts of a key fob can be damaged through heavy use. If they're bent, or damaged, the fob will not send any signals to the receiver modules in the vehicle.
Modern fobs feature rubber seals that keep out water. Submerging them in water, even if it is just a light drizzle or splash, can damage the electronic chip.
The key fob houses a chip that communicates with the vehicle's immobilizer system in order to begin it. The system relies on cryptocoding systems in newer vehicles and the older red key system in older ones. If this chip is faulty, it will need to be replaced.
Faulty 12 Volt Battery
A faulty battery can cause the key fob to cease working. When this occurs the car's computer cannot recognize that the remote is inside the vehicle.
Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls dramatically, it is time to replace the battery.
To determine the capacity of a battery test the battery's capacity by placing an electrical load on it for a couple of minutes. This will eliminate about 1 percent of the surface charge. Then, you can measure the voltage again. The longer a battery is able to keep its voltage steady and the higher its capacity. Ideally, it should remain close to 12 volts several minutes.
The radio signal is not working properly. Radio Signal
This is the most typical reason for a key fob that ceases to send signals to the car. The issue can be fixed by replacing the battery. However, it is important to purchase a battery that has the same size and voltage as the original one.
Fobs are not indestructible and can withstand a lot. The battery contacts and buttons are delicate, so they can get bent or broken by rough usage.
A signal can also be disrupted by other objects or transmitters that use the same frequency. A light-control panel in your home, for instance could interfere with key fobs that use the same frequency. This could affect the remote control in your car.
Afflicted OBDII scan tool
There are many reasons why a scan tool could not work. Some are more complicated than others.
Professional scan tools enable mechanics to monitor the car's network and run various self-tests. They can be huge time-savers, but they are also extremely expensive, and beyond the budget of most DIYers.
If your OBD2 scanner won't turn on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present it's likely that a fuse is blowing. This is among the most frequent reasons for failure of the scanner. The easiest solution is to replace the fuse that has been blown.