If the key fob does not work

The vast majority of modern cars are equipped not only with a central lock, but also with a standard alarm system. There are a wide variety of models of these security systems. But the main problem for all of them is the same - they do not want to respond to the commands of the control panel. And it always happens at the wrong time.

How to prevent a problem? Or if it arose, how to fix it quickly?

Causes of failure and solution

The first thing a person does when something does not work in his hands, he solves the problem with the help of shaking and blows. Surprisingly, sometimes it helps. However, in the case of expensive alarms, it is better not to use this method at all.

First you need to figure out why the machine does not respond to pressing the remote control button. Here are the main reasons:

• the battery discharged;
• radio interference;
• wear of the security system;
• the car’s battery has run out;
• electronics failure.

Most of these problems can be fixed by yourself. This is what a motorist can do so that the alarm continues to fulfill its function.

Dead batteries in the keychain

This is the most common problem of electronic devices with a mobile control panel. The easiest way to identify a problem is to use an additional machine remote control. They often come with a control unit. If the spare key opened the car, then it is time to change the battery in the main remote control.

Usually, when a battery loses its capacity, it affects the range of the remote control. Therefore, if the machine responds to the signal each time at a shorter distance, then you need to look for a suitable battery. And you can’t buy them in every store.

The car is in the radio interference area

If the alarm suddenly stopped working after the car was parked near a sensitive facility, then the cause of the malfunction is radio interference. This problem can also be observed in large parking lots of large cities.

If the driver cannot arm the car, you should find another parking place. Some anti-theft systems are equipped with automatic activation. In this case, to turn off the signaling, you need to bring the key fob as close as possible to the antenna module.

Worn alarm system

Long-term operation of any device inevitably leads to its breakdown. In the case of car security, the signal quality of the key fob gradually decreases. Sometimes a malfunction may lie in the antenna.

The quality of the transmitted signal can also be affected by improper installation of the transmitter module. It must be installed at a distance of at least 5 centimeters from the metal elements of the machine. There is a little trick how to increase the range of the keyring.

Life hack. How to increase the range of the keychain.

The car battery has run out

When the car is on the alarm for a long time, its battery is slightly, but discharged. In the case of a weak battery, this may be the reason why the car does not respond to the key fob.

To open the "asleep" car, just use the key for the door. If the problem occurs in the winter, then you need to diagnose the battery. Perhaps the density of the electrolyte is already small. In this case, it will be necessary to periodically charge the battery.

Electronics Failure

Old car wiring is another reason for problems with the signaling system. Because of this, they can appear often and unexpectedly. It is impossible to say exactly in which node the contact will be lost. To do this, you will need to test all the wires. Without the right skill, this problem cannot be solved. Therefore, it is better to take the car to an electrician.

If the alarm behaves strangely (it restarts for no reason, executes commands incorrectly), then this is a sign of malfunctions in the control unit. In this case, you also need to show the car to a specialist. You may need to flash the device.

The alarm goes off by itself

Sometimes the anti-theft system "lives its own life." She either disarms the car, or vice versa - puts without a command from the key. In this case, you need to pay attention to three factors.

Failure of contacts

Contact oxidation is a common cause of inadequate signaling. Most often, this problem appears in the keyfob battery compartment. The malfunction can be solved by simply cleaning the contacts with naphthale, or treating them with alcohol.

In another case, the car itself may send incorrect data to the control panel. The anti-theft system recognizes the loss of a signal on a rusted contact of a door or hood as an attempt to break into a car. If the alarm zone is displayed on the key fob, the problem is easier to fix. Otherwise, you will have to check all the connections in the anti-theft wiring.

Problem with door mechanisms

In winter, another problem may arise. The remote control shows that the central lock is open, but in fact - no. Do not think that this is a malfunction of the alarm. First of all, you should check whether the door mechanisms are rusted or not.

It also helps to test whether the central lock itself is working. If when you press the open button it does not make any sounds, then it is worth checking the fuses or wires.

Sensor malfunctioning

In modern cars, anti-theft systems are connected to auto sensors. The more complex this circuit will be, the higher the probability of a failure. The reason is that either the contact is oxidized or the sensor is out of order.

In any case, the remote control will show an error. Do not immediately rush to change the sensor. First, try to clean the wire connection.

Hack and predictor Aviator

As you can see, in most cases, the malfunction of the signaling can be eliminated by yourself. The main thing is to figure out why the problem arose. Anti-theft system protects the car from burglars. Therefore, alarms cannot be ignored. And if the car is parked in a dangerous area, you can use additional measures to protect him.

Questions and answers:

What to do if the car does not respond to the alarm? This is a sign of a dead battery. To replace it, you need to open the key fob case, tidy up the old power source and insert a new battery.

Why does the alarm trinket not work after replacing the battery? This may be due to a malfunction in the program of the key fob microcircuit, a failure in the electronics of the machine (alarm control unit, battery low) or failure of the button.

How to remove the car from the alarm if the remote control does not work? The door is opened with a key, the car ignition is turned on, within the first 10 seconds. press the Valet button once (available in most alarms).