This article wants to analyze why the car alarm is malfunctioning. There are more and more car owners. In order to protect their car, many people will install anti-theft alarms to protect their cars from accidents. But occasionally the anti-theft device will give you a little awkwardness, there are some situations, today this article is mainly to tell you about some common problems of car alarm.

First, why does the car alarm remote control fail?

1. The remote control is out of power;

2, because your remote receiver is broken;

3. If it hasn't been opened for a long time, it may be that the battery is dead.

Second, the car original key anti-theft device, the anti-theft device indicator is normal, the remote control failure car does not respond, the key unlock can be normally fired, but the car anti-theft alarm does not stop, the double flashing lights have been flashing, where is the fault?

The anti-theft device and the remote control code are garbled. You find the anti-theft device host with a small hole (learning code button), hold it with your toothpick, and the anti-theft alarm indicator lights up. At this time, you can remotely control any key within three seconds. Open a toothpick and learn successfully. After learning, you can press the remote control to test. If you can't unplug the anti-theft device (power supply + a very thick red line), go to the 4S shop to repair it.

Third, the car's alarm is useful, suddenly the central control lock did not respond, what is the reason?

If your manual switch cab door and other three doors can not be switched together, it proves that the central locking system is faulty; if the cab door can be switched manually, then the anti-theft system is faulty; the central locking system is generally aging. Need to be replaced; the fuse in the switch circuit needs to be replaced; the central control lock main unit needs to be replaced; the main motor linkage rod is loose and needs to be fastened; the anti-theft device is generally replaced by the switch fuse; the anti-theft device The failure needs to be replaced; the maintenance cost is about 120-270 yuan, and the maintenance cost of small parts is neglected 10 yuan -30 yuan!

Related technical tests show that the car burglar alarm uses frequency bands of 315.000-316.000MHz and 430.000-432.000MHz. The radio bureau's technicians tested the launch signals of dozens of car burglar alarm remotes on site. The test results show that the frequency of the signal transmitted by the remote control is mostly concentrated between 314.800 and 315.512 MHz. There are three main types of signal transmission of the remote control, that is, the normal transmission (the signal occupies a certain frequency for a long time), the interval transmission and the pulse transmission. (only fire once). At the same time, it was found that if the remote control is pressed for a long time and its transmitting signal status is normal, it will cause other burglar alarms using this frequency to be unable to be used normally.

Experts and technicians believe that the main reason for the car burglar alarm is that the frequency used by the surrounding radio transmitting equipment is similar to the working frequency of the car burglar alarm. The equipment causing interference is: indoor burglar alarm, infrared burglar alarm, Car burglar alarm itself, artificially modified car burglar alarm, etc. Proper use of the remote control is an important part of eliminating the malfunction of the adjacent car burglar alarm. The public should use the remote control or the pulse transmission method to use the car remote control. Do not press the remote control for a long time.