Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder which transmits an electronic signal from the fob to the car that allows it to unlock doors or turn on the motor. However, the fob could stop working for several reasons.
The most common reason for key fob malfunction is an inoperable coin battery. Other causes include water damages or a malfunctioning module and interference signals.
Dead Coin Battery
If your key fob's battery has failed, the initial step is to replace it. Use a button cell with the same voltage, size and specifications as your previous one.
If fiat 500 keys was exposed to water, for example a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. A paper towel soaked in isopropyl alcohol or electronic cleaner will work wonders.
If the key fob is not working despite being not exposed to water, it could be due a malfunction in the receiver module or an internal electronic chip. In these cases it is possible that reprogramming the key fob with an OBDII scanner could aid.
Water Damage
You could have water damage if your key fob was submerged in a puddle, pool or washing machine. It's possible to get it working by removing the batteries and cleaning the circuit board with ruby alcohol. It's best to let the circuit board completely dry prior to installing a battery.
It could be that you have a defective module if your key fob stops working after replacing the battery or replacing it with. You can find instructions for changing the programming of most remote keys on YouTube or consult your owner's manual. You can also try resetting the car's onboard computer by using the OBDII scan tool.
Faulty Receiver Module
The key fob contains an electronic chip that communicates with the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. Dropping the key fob can cause this, as could water exposure. If your key fob has stopped functioning due to exposure to water it is possible fix the issue if you clean the chip using electronic cleaner or isopropyl alcohol.
If the key fob continues to not respond even after cleaning it then it is likely that the receiver module is not functioning properly and will need to be replaced. A faulty receiver can also cause the key to cease to function. This is usually due to electromagnetic interference.
Faulty electronic chip
The electronic chip in the key fob is a vital element of the anti-theft device in your vehicle. It sends a message to the immobiliser inside your car to inform it whether the key is legitimate. If the chip is damaged or damaged, your car will not start.
A malfunctioning chip can be caused by interference caused by objects, bad weather or transmitters located near your vehicle. In this case it is likely that a new fob would be required.
Faulty Battery Contacts
The battery contacts on the fob's key can be damaged by heavy usage. If they are damaged or bent, the fob will not send any signals to the receiver modules inside the car.
Modern fobs come with rubber seals that keep out water. Immersing them in water, even if it's just small splash or drizzle can harm the chip's electronic circuit.
The key fob comes with an electronic chip that communicates with the immobilizer system of the vehicle in order to start it. This system makes use of cryptocoding systems in the latest vehicles and the older red key system for older models. This chip will need to be replaced if defective.
Poor 12 Volt Battery
A defective battery can cause the key fob not to work. The car's computer won't recognize the remote if this happens.
Before you replace the battery, test it by using a an voltmeter to gauge its capacity. A fully charged battery will display 12.6 volts. If the reading falls significantly it is time to replace the battery.
Install an electrical charge for a few seconds on the battery to determine its capacity. This will eliminate 1percent of the charges. After that, take the voltage once more. The greater the battery's capacity, the longer it can keep its voltage. Ideal is to hold close to 12 volts during several minutes.
Faulty Radio Signal
This is the most frequent reason for a key fob that ceases to send signals to the car. The battery can be replaced to fix this issue. It is important to buy batteries that have the same voltage and dimensions as the original.
Fobs endure a lot of abuse, but they're also not impervious to destruction. Contacts and buttons on batteries can be damaged by rough handling.
A signal may also be disrupted by other transmitters or objects which use the same frequency. For instance, a light-control panel that is near your home could transmit interference using the same frequency as key fobs use. This can interfere with the remote control of your car.
Incorrect OBDII Scan Tool
There are many reasons why a scanner might not work. Some are more complicated than others.
Professional scan tools allow mechanics to monitor the car's network and perform a variety of self-tests. These are real time-savers, but they're also expensive, and out of the reach of most DIYers.
If your OBD2 scan tool fails to turn on, make sure you check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they are all OK there is a chance that a fuse has failed. This is among the most frequent causes of a scan tool failing. The easiest fix is to replace the fuse that is blowing up.