Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that sends a signal from the fob to the car that allows it to unlock doors or start the motor. The fob might stop working due to a variety reasons.
The most commonly cited reason for key fob failure is a dead coin battery. Other reasons include water damage, an inoperative receiver module and signal interference.
Dead Coin Battery
Replace the battery if the key fob has died. Use a new button cell battery with the same size, voltage and specifications as the previous one.
If fiat 500 spare key was exposed to water, for example a splash of rain or salt water on the beach, it will need to be cleaned before it is able to be used again. A paper towel soaked in isopropyl alcohol or electronic cleaner will help.
If the key fob has not been exposed to water but it is still not working it could be due to a problem with the receiver module or an internal electronic chip. In these instances you can reprogramme the key fob using an OBDII scanner could help.
Water Damage
You could have water damage if your key fob was submerged in a pool, puddle or washing machine. You can usually get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to allow the fob to dry completely prior to installing a new battery.
If your key fob stopped working even after replacing the battery and programming it again, you might have a malfunctioning receiver module. There are reprogramming guidelines for the majority of vehicles' remote key fobs on YouTube or in your owner's guide. You can also try resetting the car's onboard computer by using the OBDII scan tool.
Faulty Receiver Module
The key fob's chip is a chip that communicates with the car's system. If the chip is damaged, it cannot longer transmit and receive signals to the vehicle. Dropping the key fob could cause this, as well as water exposure. If your key fob stopped functioning due to water exposure or water exposure, you might be able fix the issue if you clean the chip using electronic cleaner or isopropylethanol.
If the key fob is still unable to not respond following cleaning, then it is likely that the module is defective and will need to be replaced. A faulty receiver can also cause the key to stop working. This is usually due to electromagnetic interference.
Faulty electronic chip
The electronic chip in your key fob is a vital part of the anti-theft system in your car. It sends a signal the immobiliser device in your vehicle to tell it whether or not the key is in fact valid. If the chip is damaged or broken, your vehicle will not start.
A defective chip can be caused by interference signals from objects like bad weather conditions or transmitters on the same frequency near your car. In this case, you will need an entirely new key fob.
Contacts with the battery may be damaged.
The battery contacts inside a key fob are very delicate and can get damaged by repeated use. If they're damaged or bent, the fob won't send any signals to the receiver modules inside the car.
Modern fobs have rubber seals to keep out water. Submerging them in water even if just the slightest splash or drizzle could damage the chip's electronic components.
The key fob is equipped with a chip which communicates with the immobilizer system of the vehicle to begin it. This system makes use of cryptocoding systems in vehicles that are more modern, or the old red key system in older models. If the chip is damaged it will have to be replaced.
Faulty 12 Volt Batterie
A malfunctioning battery could cause the remote to cease working. The car's computer will not recognize the remote when this happens.
Before you replace the battery, test it by using a the voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls dramatically it is time to replace the battery.
Install an electrical charge for a few moments on the battery to gauge its capacity. This will remove 1% of the surface charges. Then, you can measure the voltage once more. The higher the capacity of the battery is, the longer it will maintain its voltage. Ideal is to hold at or near 12 volts for several minutes.
Radio Signal Faulty Radio Signal
This is the most common reason for a key fob to stop sending signals to a car. This problem can be solved by replacing the battery. It is crucial to purchase a battery that has the same dimensions and voltage as the original.
Fobs aren't impervious to damage and are susceptible to damage. Battery contacts and buttons can be damaged through rough handling.
A signal can also be affected by other transmitters or objects that operate on the same frequency. For instance, a lighting control panel that is near your home could send interference on the same bandwidth that key fobs utilize. This could affect the remote control of your car.
Incorrect OBDII scan tool
There are many reasons why a scan tool might not work. Certain are more complicated than others.
Professional scan tools allow a mechanic to observe the car's networks and perform a variety of self-tests. These are real time savers but they're also expensive, and out of the budget of many DIYers.
If your OBD2 scan tool doesn't turn on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are OK it's likely that a fuse has failed. This is among the most common reasons for failure of the scanner. It is typically easy to fix the issue by replacing the fuse blowing up.