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fiat 500 keys Panda Key Fob Replacement

Fiat 500 Key Panda keyfobs are equipped with a transponder that sends signals from the fob to the car that allows it to unlock doors or start the motor. However, the fob could stop working for several reasons.

The most commonly cited reason for key fob failure is a dead coin battery. Other causes are water damage as well as a defective module and interference signals.

Dead Coin Battery

Replace the battery in case your key fob has died. Make use of a new button battery that is exactly the same size, voltage and specification like the previous one.

If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned prior to being used again. A paper towel soaked in isopropyl alcohol or electronic cleaner can be the solution.

If the key fob is not working despite being not exposed to water, it could be due to a glitch in the receiver module or an internal electronic chip. In these cases you can reprogramme the key fob with an OBDII scanner could help.

Water Damage

If your key fob has gotten an immersion in the puddle or pool, or taken a trip down the wash machine, you might have some water damage. It's generally possible to get it working by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is recommended to let the fob completely dry before putting in batteries.

If your key fob isn't working even after replacing the battery and reconfiguring it, you may have a problem with the receiver module. There are instructions for reprograming the majority of remote keys on YouTube or refer to your owner's manual. You could also try resetting the car's onboard computer 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 if it becomes damaged. Dropping the key fob could result in this, as can exposure to water. If your key fob has stopped functioning due to water exposure, you may be able to fix it by attempting to clean the chip using electronic cleaner or isopropyl ethanol.

If the key fob does not respond after cleaning it, you can be sure that the module is defective and must be replaced. A defective receiver module could also cause the remote control key to not function. This is often caused by electromagnetic interference.

A malfunctioning electronic chip

The electronic chip that is in your key fob plays a vital function in the anti-theft security system of your vehicle. It transmits a message the immobiliser inside your car to determine if the key is valid. Your car will not start if the chip is damaged.

A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters in the vicinity of your vehicle. In this situation it is likely that a new fob would be required.

Contacts with the battery may be damaged.

The battery contacts of a key fob are very delicate and could be damaged when used for long periods of time. If they're damaged or bent, the fob will not be able to send any signals to the receiver modules inside the car.

Modern fobs are constructed with rubber seals to keep out water. Submerging them in water even if just the slightest splash or drizzle can harm the electronic chip.

The key fob is equipped with a chip that communicates with the vehicle's immobilizer system to activate it. This system makes use of cryptocoding systems in modern vehicles or the red key system used in older models. The chip must be changed if it is malfunctioning.

A faulty 12 Volt battery

A defective battery can cause the key fob to cease to function. The car's computer may not recognize the remote if this happens.

Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls dramatically then it's time to replace the battery.

Put an electrical load for a short period of time on the battery to determine its capacity. This will eliminate 1percent of the charges. Then measure the voltage again. The longer a battery is able to hold its voltage and the higher its capacity. Ideally, it should remain at 12 volts or less for several minutes.

Faulty Radio Signal

This is the most typical reason for a key fob that stops sending signals to the car. The issue can be fixed by replacing the battery. However, it is important to purchase a battery that is the same voltage and size as the original.

Fobs aren't impervious to damage and can withstand a lot. Battery contacts and buttons can be damaged through rough handling.

Other transmitters or objects operating on the same frequency can also disrupt a signal. For instance, a light control panel in your home could send interference over the same frequency as key fobs use. This could affect your car's remote control.

Incorrect OBDII Scan Tool

There are many reasons why a scanner tool may not function. Some are more complex than others.

Professional scan tools enable mechanics to monitor the car's network and run a range of self-tests. These are great time savers, however they can be expensive, out of the range of most DIYers.

If your OBD2 scanner isn't turning on, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present it's possible that a fuse has been blown. This is among the most frequent causes of a scan tool failing. It is generally simple to fix the issue by replacing the fuse blowing up.