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fiat Doblo key fob programming Panda key fobs contain an transponder chip that transmits signals to your car to open the doors or start the engine. However, the fob could stop working for several reasons.

The most common cause of key fob malfunction is an inoperable coin battery. Other causes are water damage or a damaged module and interference signals.

Dead Coin Battery

If your key fob battery has gone out of service, the first step is to replace it. Use a brand new button battery that has the same voltage, size, and specification as the previous one.

If the key fob was exposed to water, for example a splash of rain or salt water on the beach, it will need to be cleaned before it is able to be used again. The best method is to use the paper towel and soak it in isopropyl or electronic cleaner.

If the key fob doesn't working despite not being exposed to water it could be due to a malfunction in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these instances.

Water Damage

You could have water damage if your key fob was submerged in a pool, puddle or washing machine. It's usually possible to get it back in working order by taking the batteries off and cleaning the circuit board with ruby alcohol. It's a good idea to let the fob dry completely prior to installing a new battery.

If your key fob stopped working even after replacing the battery and reprogramming it, you may have a defective receiver module. Reprogramming instructions are available for all vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset the computer of your car using the OBDII scanner tool.

Faulty Receiver Module

The key fob contains a chip which communicates with the vehicle's system. If this chip becomes damaged, it can no longer transmit and receive signals to the vehicle. Dropping the key fob can cause this, as well as exposure to water. If the key fob stopped working after exposure to water, it may be possible to repair it by cleaning the chip with isopropyl ethanol or electronic cleaner.

If the key fob continues to not respond even after cleaning it it is likely that the module is defective and must be replaced. A faulty receiver can also cause the key to not work. This usually happens due to electromagnetic interference.

A defective electronic chip

The electronic chip in your key fob plays an important function in the anti-theft security system of your car. It sends a signal to the immobiliser in your car to determine whether the key is genuine. If the chip is damaged or broken, your car won't start.

A damaged chip could be caused by interference caused by objects, bad weather or transmitters close to your vehicle. In this instance, you will need a new key fob.

Faulty battery contacts

The battery contacts inside a key fob are very delicate and can get damaged through repeated use. If they're broken or Fiat Doblo Key Fob Programming bent, the fob will not 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 acceptable, but submerging them in saltwater may cause damage to the electronic chip.

The key fob has a chip which communicates with the immobilizer system of the vehicle to begin it. It uses the old red keys that were used in older vehicles, or the cryptocoding system found in newer vehicles. The chip must be replaced if defective.

A faulty 12 Volt battery

A malfunctioning battery could cause the key fob to work. The car's system will not recognize the remote when this happens.

Test the battery using a voltmeter before replacing it 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.

Set an electrical load for a few seconds on the battery to check its capacity. This will remove 1% of the surface charges. After that, measure the voltage. The longer a battery is able to keep its voltage steady and the higher its capacity. Ideal is to hold close to 12 volts over several minutes.

Problems with Radio Signal

This is the most typical reason for the key fob to stop sending signals to vehicles. The battery can be replaced to solve this problem. However, it is important to buy a new battery with the same voltage and size as the original one.

Fobs take a lot of abuse, and they aren't indestructible. Contacts and buttons on batteries can be damaged through rough handling.

Other transmitters or objects that use the same frequency could also interfere with a signal. For example, a light-control panel near your home may transmit interference on the same bandwidth that key fobs utilize. This can affect the remote control of your car.

Afflicted OBDII scan tool

There are many reasons why a scan tool may not work. Some are more complicated than others.

Professional scan tools enable mechanics to observe the car's network and run various self-tests. These tools can help save time, but are expensive and are out of reach for most DIYers.

If your OBD2 scan tool isn't turning on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they are all OK there is a chance that a fuse has blown. This is one of the most frequent causes of scan tool failure. The easiest fix is to replace the fuse that has been blown.