How to identify common faults of car anti-theft alarm

The use of the car anti-theft alarm system is achieved by means of the car power supply and some circuits of the car itself. Once the anti-theft device fails, it will affect the normal use of the vehicle. What are the causes of these common failures? How to deal with it? A few days ago, the relevant experts analyzed the cause of the failure and offered several tips for everyone.

Symptom 1: The remote control operation does not work. When you press each function button of the remote control, the red LED indicator of the remote control does not light.

Reason analysis: This failure is mostly in the remote control itself, there are the following situations: (1) The battery is exhausted; (2) The positive and negative reeds of the battery are rusted or have poor contact; (3) The remote control is exposed to rain or water. Water, oil immersion, etc. In this regard, the circuit board can be taken out, washed with industrial alcohol, blown dry with a household electric hair dryer or allowed to dry naturally before it can be used.

Trouble phenomenon 2: The remote control distance is getting shorter and shorter, when the signal is transmitted, the LED brightness of the remote control becomes dark or flickers.

Reason analysis: This phenomenon is mostly due to insufficient battery power, just replace the battery. In addition, it is recommended not to adjust or replace the components of the remote control by yourself, so as not to cause greater losses.

Symptom 3: A function key of the remote control is invalid, and the LED indicator does not light when the key is pressed.

Reason analysis: a function key fails (other function keys are normal) mostly because the function key is damaged or the solder joint of the key pin and the circuit board is unsoldered. The buttons of the remote control are mostly micro switches, which should be light in normal use, and pay attention to waterproof, anti-drop and heavy pressure.