Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that transmits an electronic signal from the fob to the car in order to unlock doors or turn on the motor. The fob could stop working due to a variety of reasons.
The most common reason for key fob failure is the battery of the coin is dead. Other causes are water damage, malfunctioning receiver modules and signal interference.
Dead Coin Battery
Replace the battery if your key fob has failed. Use a new button cell battery with 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. A paper towel soaked in alcohol or electronic cleaner will do the trick.
If the key fob is not working despite not being exposed to water, it could be due a malfunction in the receiver module or internal electronic chip. In these instances, reprogramming the key fob with an OBDII scanner can aid.
Water Damage
If your key fob's battery has taken a bath in the pool or puddle, or taken a trip to the washing machine, you may have some water damage. It's usually possible to get it back to working by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is recommended to let the circuit board completely dry before installing batteries.
It could be that you have a defective module in the event that your remote stops working after replacing the battery or changing the programming. You can find information on changing the programming of most remote keys on YouTube or in the owner's manual. You can also reset the car's computer using the OBDII scanner tool.
Faulty Receiver Module
The key fob is equipped with a chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. This can be caused by dropping the key fob or by water exposure. If the key fob is not functioning after exposure to water, it is possible to repair it by cleaning the chip with isopropyl ethanol or electronic cleaner.
If the key fob continues to not respond following cleaning, there is a good chance that the component is damaged and will require to be replaced. A defective receiver can cause the key to cease to function. This is usually due to electromagnetic interference.
A defective electronic chip
The electronic chip in the key fob is a vital part of the anti-theft system in your car. It transmits a message the immobiliser inside your car to inform it that the key is valid. If the chip is damaged or broken, your vehicle will not start.
A malfunctioning chip can be caused by interference from objects, bad weather or transmitters close to your vehicle. In this instance the replacement fob will be needed.
Contacts for the battery that are damaged
The battery contacts of the fob's key can be damaged through heavy use. If they are damaged or bent, the fob will not be able to send any signals to the receiver modules inside the car.
Modern fobs are equipped with rubber seals that keep out water. In the event of submerging them in water, even if it is just a light drizzle or splash could damage the chip's electronic components.
The key fob houses the chip that connects to the vehicle's immobilizer to allow it to start it. The system utilizes the old red keys in older vehicles, or the cryptocoding system that is used in newer cars. If the chip is defective and needs to be replaced.
A faulty 12 Volt battery
A malfunctioning battery could cause the key fob not to work. If this happens the car's computer cannot recognize that the remote is within the vehicle.
Test the battery with the voltmeter before replacing it to determine its capacity. A fully charged battery will display 12.6 volts. If the reading decreases significantly, it's time to replace it.
To test the battery's power to determine its capacity, put an electric load on it for a few minutes. This will take away about 1 percent of the charge on the surface. Then measure the voltage again. The longer the battery is able to hold its voltage, the better its capacity. It should be close to 12 volts several minutes.
Problems with Radio Signal
This is the most frequent reason behind a key fob that stops sending signals to the car. The battery can be replaced to fix this issue. It is crucial to purchase a battery with the same dimensions and voltage as the original.
Fobs take a lot of abuse, but they're also not impervious to destruction. The battery buttons and contacts are brittle and are susceptible to being bent or damaged by rough usage.
Other objects or transmitters using the same frequency can also disrupt a signal. A light-control panel in your home, for instance can interfere with key fobs which use the same bandwidth. This could interfere with your car's remote control.
Afflicted OBDII Scan Tool
There are a number of reasons why a scan tool could not function. Some are more complex than others.
Professional scan tools allow a mechanic to examine the car's systems and perform a variety of self-tests. These tools can save a lot of time, but are expensive and out of reach for most DIYers.
If your OBD2 scanner won't start examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present, it's likely that a fuse has blown. This is among the most frequent causes of scan tool failure. The most straightforward fix is to replace the blown fuse.