Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder, which sends signals from the fob to the car that allows it to unlock doors or start the motor. G28 Car Keys may stop working due to a variety of reasons.
The most frequent cause of key fob failure is an inoperable coin battery. Other causes include water damage malfunctioning receiver modules, and signal interference.
Dead Coin Battery
If the battery in your key fob has gone out of service, the first step is to replace it. Use a new button cell battery that has exactly the same size, voltage and specification as the original.
If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before using again. The best method is to use an old towel soaked in isopropyl or electronic cleaner.
If the key fob has not been exposed to water, but still does not work it could be due to an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob with an OBDII scan may aid in these situations.
Water Damage
You might have water damage if your key fob was submerged in a pool, puddle or washing machine. It's usually possible to 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 allow the device to completely dry before installing batteries.
If your key fob stopped working even after replacing the battery and reconfiguring it, you may have a malfunctioning receiver module. There are instructions for the reprogramming of most remote keys on YouTube or consult 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 has an electronic chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. This could be due to dropping the key fob, or due to exposure to water. If your key fob stopped functioning due to exposure to water it is possible to fix it if you clean the chip using electronic cleaner or isopropyl ethanol.
If the key fob doesn't respond to cleaning, it is possible that the module has issues 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 chip inside your key fob is a vital role in the anti-theft system of your vehicle. It sends a signal the immobiliser device in your vehicle to tell it whether the key is legitimate. If the chip is damaged or broken, the car will not start.
A damaged chip could be caused by interference from other objects, bad weather or transmitters in the vicinity of your vehicle. In this situation, you will need an entirely new key fob.
Faulty Battery Contacts
The battery contacts of the fob's key can be damaged due to heavy use. If they're damaged or bent, the key fob won't send any signals to the receiver modules inside the car.
Modern fobs are constructed with rubber seals that keep out water. A splash of water or a light rain is fine but submerging them into saltwater may cause damage to the electronic chip.
The key fob contains a chip which communicates with the immobilizer system of the vehicle to start it. The system is based on the old red keys for older vehicles or the cryptocoding system used in newer vehicles. If this chip is faulty it must be replaced.
Faulty 12 Volt Batterie
A malfunctioning battery could cause the key fob to function. When this happens, the car's computer system won't recognize that the remote is inside the vehicle.
Test the battery using a voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly it is time to replace the battery.
To test the battery's power test the battery's capacity by placing an electrical load on it for a few minutes. This will take away about 1% of the charge on the surface. After that, measure the voltage. The longer the battery can keep its voltage steady more effectively, the greater its capacity. The ideal is to keep it close to 12 volts over several minutes.
Radio Signal Faulty Radio Signal
This is the most frequent reason behind a key fob that ceases to send signals to the car. The issue can be fixed by replacing the battery. It is important to buy an identical battery voltage and dimensions as the original.
Fobs aren't indestructible and can be damaged by a lot. The battery buttons and contacts are brittle, so they can get bent or damaged from rough use.
The signal could also be impacted by other transmitters or objects that use the same frequency. A light-control panel in your home, for example can interfere with key fobs that use the same bandwidth. This could affect the remote control of your car.
Afflicted OBDII scan tool
There are a number of reasons why a scan tool might not work. Some are more complicated than others.
Professional scan tools enable a mechanic observe the car's network, and run various self-tests. These tools can save you a lot of time, but are costly and not accessible to most DIYers.
If your OBD2 scan tool isn't turning on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape the chances are that a fuse has been blown. This is one of the most frequent reasons for failure of the scanner. The most straightforward fix is to replace the fuse that is blowing up.