Fiat 500 Keys: A Simple Definition
Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that sends a signal from the fob to the car to unlock doors or turn on the motor. However, the fob may be inoperable due to various reasons.
A dead battery for the coin is the most common cause of malfunctioning keys. Other causes include water damages, a faulty module, and interference signals.
Dead Coin Battery
If the battery in your key fob is dead, the first step is to replace it. Use a button cell with the same voltage, size and specifications as your previous one.
If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before being used again. A paper towel soaked with isopropyl alcohol or electronic cleaner can work wonders.
If the key fob doesn't working even though it is not exposed to water, it could be due to a malfunction in the receiver module or in the internal electronic chip. Reprogramming the keyfob with an OBDII scan could aid in these situations.
Water Damage
There could be water damage if your key fob was submerged in a pool, puddle or washing machine. It's generally possible to repair it by taking out the batteries and cleaning the circuit board using ruby alcohol. It's a good idea allow the fob to dry completely before putting in a new battery.
If your key fob stopped working, even after replacing the battery and programming it again, you might have a defective receiver module. There are instructions for reprogramming most vehicles' remote keys on YouTube, or consult the owner's manual. You can also reset the computer in your car with the OBDII scanner tool.
Faulty Receiver Module
The key fob has an electronic chip that communicates with the car's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. Dropping the key fob could cause this, as could exposure to water. If your key fob isn't working due to water exposure, you may be able fix the issue if you clean the chip with electronic cleaner or isopropylethanol.
If the key fob doesn't respond to cleaning, it's possible that the module has a fault and needs to be replaced. A defective receiver can cause the key to not work. fiat punto keys is usually due to electromagnetic interference.
A defective electronic chip
The electronic chip that is in your key fob plays a vital role in the anti-theft security system in your car. It sends a signal to the immobiliser unit of your vehicle to tell it whether the key is valid. The car won't start in the event that the chip has been damaged.
A damaged chip could be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency in close proximity to your vehicle. In this situation you'll need a new key fob.
Contacts of the battery may be damaged.
The battery contacts of the key fob could be damaged by heavy usage. If they're bent or broken the fob won't send any signals to the receiver modules inside the car.
Modern fobs are constructed with rubber seals in order to keep out water. A splash of water or light rain is acceptable, but submerging them in salt water could damage the electronic chip.
The key fob has chip that communicates with the immobilizer system of the vehicle to begin it. The system is based on the red keys of older vehicles as well as the cryptocoding system used in modern vehicles. This chip will have to be changed if it is malfunctioning.
Faulty 12 Volt Battery
A damaged battery could cause the key fob not to function. When this occurs, the car's computer system will not recognize that the remote is within the vehicle.
Before you replace the battery, test it by using a a voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If the reading decreases significantly, it is time to replace the battery.
To test a battery's capacity, place an electrical load on it for a couple of minutes. This will remove approximately 1% of the surface charge. After that, measure the voltage. The longer the battery is able to keep its voltage steady greater is its capacity. It is ideal to maintain close to 12 volts over several minutes.
Radio Signal Faulty Radio Signal
This is the main reason for a keyfob that stops sending signals to the car. The battery can be replaced to solve this problem. It is essential to purchase a battery with the same dimensions and voltage as the original.
Fobs endure a lot of abuse, and they aren't indestructible. Contacts on batteries and buttons can be damaged through rough handling.
Other transmitters or objects operating on the same frequency may also interfere with a signal. A light-control panel at your home, for example can interfere with key fobs that use the same bandwidth. This can interfere with the remote control in your car.
Faulty OBDII scan tool
There are a number of reasons why a scanner might not work. Some are more complicated than others.
Professional scan tools allow a mechanic to monitor the car's network and conduct a variety self-tests. These are real time savers, however they are also extremely expensive, and beyond the budget of many DIYers.
If your OBD2 scan tool isn't turning on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are OK it's possible that a fuse has been blown. This is one of the most common causes of failures in the scan tool. It is often easy to fix the issue by replacing the fuse blowing up.