A Fiat 500 Keys Success Story You'll Never Be Able To
www.thekeylab.co.uk contain a transponder chip which sends a signal to your car to open the doors and start the engine. However, the key fob may be inoperable due to various reasons.
The most common cause of key fob failure is the battery of the coin is dead. Other causes are water damage or a damaged module and interference signals.
Dead Coin Battery
If your key fob's battery is dead, the first thing to do is replace it. Use a brand 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 a splash of rain or salt water at the beach, it will need to be cleaned before it can be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner will be the solution.
If the key fob is not working despite not being exposed water, it could be due to a glitch in the receiver module, or even in the internal electronic chip. In these instances, reprogramming the key fob using an OBDII scanner might aid.
Water Damage
If your key fob has gotten an immersion in the pool or puddle or walked to the washing machine, you may have some water damage. It's possible to fix it by getting rid of the batteries and cleaning the circuit board using rubbing alcohol. It's best to let the board completely dry prior to installing batteries.
If your key fob has stopped working even after replacing the battery and programming it again, you might have a problem with the receiver module. You can find reprogramming procedures for most vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset your computer of your vehicle using the OBDII scanner tool.
Faulty Receiver Module
The key fob has the chip that communicates with the vehicle's system. If the chip is damaged, it cannot longer transmit or receive signals to the vehicle. A key fob falling off can result in this, as can exposure to water. If your key fob isn't working due to exposure to water and you are unable fix the issue if you clean the chip with electronic cleaner or isopropyl ethanol.
However, if the key fob does not respond after cleaning it you can be sure that the component is damaged and will need to be replaced. A damaged receiver module may also cause the remote control key to not function. This is typically caused by electromagnetic interference.
A defective electronic chip
The electronic chip inside your key fob is a crucial part of the anti-theft system in your vehicle. It transmits a signal to the immobiliser device in your vehicle to tell it whether or not the key is genuine. If the chip is damaged or broken, the car will not start.
A malfunctioning chip can be caused by interference caused by objects, bad weather or transmitters close to your vehicle. In this instance, you will need an entirely new key fob.
Contacts to the battery are not working properly.
The battery contacts of the fob's key can be damaged by excessive usage. If they are damaged or bent, the key fob won't send any signals to the receiver modules in the car.
Modern fobs are equipped with rubber seals to keep out water. Submerging them in water even if just a light drizzle or splash could damage the electronic chip.
The key fob has an electronic chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system uses the old red keys that were used in older vehicles as well as the cryptocoding system used in the latest vehicles. This chip will need to be replaced if it's damaged.
A faulty 12 Volt battery
A malfunctioning battery could cause the key fob to stop working. When this occurs, the car's computer system will not recognize that the remote is within 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 dramatically it is time to replace the battery.
Set an electrical load for a short period of time on the battery to determine its capacity. This will remove approximately 1 percent of the charge on the surface. Then, you can measure the voltage once more. The higher the capacity of the battery and the longer it can keep its voltage. The ideal is to keep it close to 12 volts during several minutes.
Radio Signal Faulty Radio Signal
This is the most common reason for a keyfob that stops sending signals to the car. The battery can be replaced to solve this issue. However, it is crucial to select a replacement battery with the same size and voltage as the original.
Fobs aren't impervious to damage and are susceptible to damage. The battery contacts and buttons could be damaged by rough handling.
The signal could also be interrupted by other objects or transmitters which use the same frequency. A light control panel in your home, for instance can interfere with key fobs using the same bandwidth. This could interfere with the remote control of your car.
Incorrect OBDII Scan Tool
There are many reasons why a scan tool may not work. Some are more complex than others.
Professional scan tools enable mechanics to observe the car's network and perform various self-tests. These tools can help save time, but are costly and are out of reach for 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 they're all fine it could be that a fuse has blown. This is among the most frequent causes of failures in the scan tool. The most straightforward fix is to replace the blown fuse.