Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that sends an indication from the fob to the car to unlock doors or start the motor. The fob might stop working for a variety of reasons.
The most frequent cause of key fob malfunction is the battery of the coin is dead. Other causes include water damage or a malfunctioning module and interference signals.
Dead Coin Battery
Replace the battery in case your key fob has gone out of service. Choose a new button battery that has exactly the same size, voltage and specifications as the previous one.
If the key fob was exposed to water (such as rain or saltwater at the beach) it should be cleaned before being used again. A paper towel soaked in alcohol or electronic cleaner can do the trick.
If the key fob hasn't been exposed to water but still does not work it could be because of a problem with the receiver module or an internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these cases.
Water Damage
You could have water damage if your key fob was submerged in a pool, puddle or washing machine. You can usually be able to get it back up and running by removing the battery and scrubbing the circuit board with isopropyl alcohol. It is best to let the board completely dry prior to installing batteries.
If your key fob isn't working even after replacing the battery and reconfiguring it, you may have a malfunctioning receiver module. You can find instructions for changing the programming of most remote keys on YouTube or in your owner's manual. You can also reset your car's computer using the OBDII scanner tool.
Faulty Receiver Module
The key fob's chip is a chip which communicates with the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. This can be caused by dropping the key fob, or by exposure to water. If your key fob stopped working due to water exposure and you are unable to fix it if clean the chip using electronic cleaner or isopropyl alcohol.
If the key fob still does not respond following cleaning, there is a good chance that the module is defective and will require to be replaced. A malfunctioning receiver could cause the key to not work. This is usually caused by electromagnetic interference.
A malfunctioning electronic chip
The electronic chip in your key fob plays an important role in the anti-theft system of your vehicle. It sends a signal to the immobiliser unit in your car to inform it whether the key is valid. Your car will not start in the event that the chip is damaged.
A defective chip could be caused by interference from other objects, weather conditions or transmitters located near your vehicle. In this case, you will need an entirely new key fob.
Contacts for the battery that are damaged
The battery contacts of the key fob are delicate and can get damaged when used for long periods of time. If they're broken or bent, the fob will not send any signals to the receiver modules in the car.
Modern fobs are made with rubber seals that keep out water. A splash of water or a light rain is acceptable, but submerging them in salt water could damage the electronic chip.
The key fob is equipped with a chip that communicates with the vehicle's immobilizer system to activate it. This system utilizes cryptocoding systems in modern vehicles and the older red key system used in older ones. If the chip is not working properly and needs to be replaced.
A faulty 12 Volt battery
A defective battery can cause the key fob not to work. The car's system will not recognize the remote if this occurs.
Before replacing the battery, test it with a voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If the reading falls significantly 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 about 1 percent of the surface charge. Then, you can measure the voltage again. The longer the battery is able to keep its voltage steady, the better its capacity. Ideally, fiat 500 key will remain at or near 12 volts for several minutes.
The radio signal is not working properly. Radio Signal
This is the most typical reason for a key fob that stops sending signals to the car. This issue can be fixed by replacing the battery. It is crucial to purchase a battery that has the same voltage and dimensions as the original.
Fobs are subject to a lot of punishment, and aren't impervious to destruction. The battery buttons and the contacts are fragile and are susceptible to being bent or damaged from excessive use.
A signal may also be disrupted by other objects or transmitters which use the same frequency. A light control panel in your home, for instance could interfere with key fobs which use the same frequency. This can interfere with the remote control in your car.
Faulty OBDII scan tool
There are many reasons scanners don't function. Some are more complex than others.
Professional scan tools allow mechanics to look over the car's networks and run a variety of self-tests. These are great time savers but they're also expensive, out of the range of most DIYers.
If your OBD2 scanner won't turn on, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're both in good shape it's possible that a fuse has been blown. This is among the most common causes of scan tool failure. It is often easy to fix the issue by replacing the fuse blowing up.