Fiat Panda Key Fob Replacement
Fiat Panda key fobs contain a transponder chip that sends signals to your car to open the doors or start the engine. However, the fob could be inoperable due to various reasons.
A dead battery for the coin is the most common reason for key fob malfunctions. Other causes include water damage the receiver module is defective, and signal interference.
Dead Coin Battery
If the battery in your key fob has failed, the initial step is to replace it. Use a new button cell battery that has the same size, voltage and specifications as the old one.
If the key fob was exposed to water (such as rain or saltwater at the beach) It must be cleaned before using again. The best solution is to use 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, there may be an issue with the receiver module or an internal electronic chip. In these cases it is possible to re-programme the key fob with an OBDII scanner may aid.
Water Damage
If your key fob took a bath in the pool or puddle or even a trip down the wash machine, you may have some water damage. It is usually possible to be able to get it back up and running by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to let the fob completely dry prior to installing the battery.
There could be G28 with the module in the event that your remote stops working after replacing the battery or replacing it with. You can find reprogramming procedures for all vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the computer of your car using the OBDII scanner tool.
Faulty Receiver Module
The key fob has a chip which communicates with the vehicle's system. If the chip is damaged, it will be unable to 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 is not working after water exposure it is possible to fix it by cleaning the chip with isopropyl alcohol or electronic cleaner.
However, if the key fob continues to not respond following cleaning, it is likely that the component is damaged and needs 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 the key fob is an important component of the anti-theft system in your vehicle. It sends out a signal the immobiliser unit of your car to inform it whether the key is in fact valid. Your car will not start when the chip is damaged.
A faulty chip can also be caused by interference signals from objects, bad weather conditions or transmitters on the same frequency near your car. In this case it is likely that a new fob would be required.
Contacts to the battery are not working properly.
The battery contacts on a key fob can be damaged due to heavy use. If they are damaged or bent, the fob will not transmit any signals to the receiver modules inside the car.
Modern fobs are equipped with rubber seals that keep out water. Immersing them in water, even if it's just a light drizzle or splash could harm the chip's electronic components.
The key fob contains an electronic chip that communicates with the vehicle's immobilizer system in order to activate it. This system utilizes cryptocoding systems in vehicles that are more modern, or the old red key system used in older ones. If this chip is faulty, it will need to be replaced.
The 12 Volt Battery is faulty
A damaged battery could cause the key fob not to function. When this happens the car's computer will not be able to recognize that the remote is in the vehicle.
Test the battery with a voltmeter before replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly then it's time to replace it.
Place an electrical load for a short period of time on the battery to determine its capacity. This will eliminate approximately 1% of the charge on the surface. After that, measure the voltage. The longer a battery is able to keep its voltage steady, the better its capacity. Ideal is that it stays at or near 12 volts for several minutes.
The radio signal is not working properly. Radio Signal
This is the most typical reason for the key fob not sending signals to the car. The issue can be fixed by replacing the battery. It is crucial to purchase an identical battery voltage and dimensions as the original.
The buttons are not impervious to destruction and can be damaged by a lot. The battery buttons and contacts are delicate and can be bent or broken by excessive use.
Other transmitters or objects using the same frequency could also interfere with the signal. For example, a light-control panel that is near your home could transmit interference using the same bandwidth that key fobs use. This could interfere with the remote control of your car.
Incorrect OBDII scan tool
There are many reasons scanners may not work. Some are more complex than others.
Professional scan tools allow a mechanic to examine the car's systems and run a variety of self-tests. These tools can save time, but they are costly and are out of reach for the majority of DIYers.
If your OBD2 scan tool isn't turning on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're all fine, a fuse may have blown. This is one of the most common causes of failures in the scan tool. The easiest fix is to replace the fuse that has been blown.