By itself, alarms are triggered: possible causes, solutions and recommendations

Modern car owners are so afraid of hijacking that almost every car (even the old "nine") is equipped with an alarm system. Moreover, if earlier the anti-theft system was considered a luxury, now the market is simply full of cheap Chinese systems. In most cases, problems arise precisely with them. However, there are situations when the "Starline" alarm itself is triggered. But this is a well-known manufacturer of anti-theft systems. What should a car owner do? About why the alarm system works by itself, we'll tell you in our today's article.

Shock sensor

Such are all anti-theft systems. The impact sensor works very simply. Once the device detects vibrations, it sends the appropriate signal to the head chip. Then the pulse goes to the siren. The alarm starts to "yell". The same principle applies to fire alarms. It works itself, not from vibrations, but from smoke. But this is another topic for conversation. In general, the thing is quite useful. After all, at the slightest blow, the car immediately gives "cries for help." The sound effect will scare away the attacker. At least passers-by will pay attention to it. But sometimes this sensor is a problem. Because of it, the alarm itself is triggered. "Alligator" is either "Starline", in this case it does not matter. After all, if the car turned on the siren, it's unlikely to please the court, especially at night. Therefore, urgent measures should be taken to eliminate the problem.

How to adjust the sensor?

Adjusting it depends on the design features. On most Chinese alarms, the shock sensor is separately driven and connected to the central unit via wires. On the front of this element, you can see a plastic screw. Using a Phillips screwdriver, you can manually adjust its sensitivity. The unit itself is not necessary to configure. The mechanical regulator aligns the sensitivity threshold, and then you will not by itself trigger an alarm. Experienced motorists say that it is not worth adjusting the sensor to high sensitivity. After all, the siren will work even from a nearby dog. Expose stands at the level of "below average."

What if you did not find your shock sensor? On some alarms it is built into the unit itself. In this case, follow the instruction manual. Adjustment is made from the key fob, with a pair pressing the CH2 key.

Excessive moisture

Washing is a very pleasant experience for any motorist. After all, what could be better than a brilliant, perfectly washed car? But sometimes after this procedure, "buggy" signaling. Electronics do not like water and much moist air. Therefore it is necessary to exclude its hit on the sensors. And the alarm unit itself should be installed in the most dry place. Sometimes moisture helps close the contacts. For this reason, the alarm itself is triggered. How to be in this situation? Usually everything goes by itself for 1-2 days. In this case, it is recommended to turn off the temporary alarm by closing the door to the mechanical lock.

Volume sensor

If the alarm itself triggers, you should pay attention to one more sensor. It works in case of a change in the volume of air in the cabin. That is, if an intruder gets inside, the device will immediately give a signal to the central unit and the siren. The steering wheel is locked, the starter can not be scrolled either.

What is noteworthy, such elements are installed only on expensive alarms. Chinese brands are limited only by the impact sensor. How can this be due to a spontaneous alarm? Everything is very simple. For example, on the way home you forgot to take out the package from the supermarket. And then one of the products starts to slide down. The sensor picks up the signal and gives an impulse to the siren. It would seem a banal situation. But it is because of it that the alarm itself is triggered. Therefore, when leaving the car do not leave inside the bag and other items.

Limiters

As is known, in addition to sensors, special endpoints are used in signaling. They are installed on:

• Hood.
• Doors.
• The luggage compartment.

The essence of their work is extremely simple. As soon as an intruder opens one of the car parts, the contacts close, and the impulse is transmitted to the siren. The alarm goes off. But unlike sensors, the limit switches are installed in more vulnerable places - near the thresholds. All would be nothing, if not moisture. In this place it accumulates very well. After all, there is a drainage of doors nearby. As soon as the water reaches the limit switch, the contacts are spontaneously closed. As these elements look, the reader can see in the photo below. The alarm system thinks that someone has unauthorizedly made his way inside the vehicle (although all the doors are locked). As a result - a loud siren in the middle of the night. Often, these endpoints "buggy" after washing and rain. As soon as the moisture from the contacts evaporates, the system works as before.

How to avoid false positives?

The guarantee of high-quality alarm operation is correct installation. Therefore, it is necessary to ensure a qualitative connection of the contacts and maximum tightness. All the wires are hid in the corrugation, and the contacts are insulated on heat shrinkage. Insulating tape is a less reliable (one might say extreme) solution. As for the location of the alarm unit itself, it should be installed under the front panel, on the passenger side. This is the cleanest and dryest place in the cabin.

Conclusion

So, we found out why the alarm itself is triggered. As you can see, the system can fail for various reasons. In 70 percent of cases, the cause of all problems is moisture. Therefore, it is worthwhile to secure yourself and install the unit in the most dry place. The sensors are also very demanding on the humidity. But they can also require additional adjustment. If the shock sensor is adjusted programmatically from the keyfob, then when the terminals of the battery are removed, the settings may fail and return to the factory settings. This, too, must be taken into account. Otherwise, the problems are solved by banal drying of contacts or by setting up a particular sensor.