Introduction to car burglar indicators
Anti-theft indicator is the most important component of the car anti-theft system, it will generally be lit after locking the car and when the vehicle anti-theft system fails, it is usually divided into two ways, one is indirect flashing, the frequency is once a second; one is always on. The working principle of the anti-theft indicator is also very simple, there is a chip inside the remote control key and the anti-theft key is stored, when the legal key enters the car or near the vehicle, the antenna in the car and the reading coil after the ignition switch will compare the key, if the key is correct, it can start normally, if the key is wrong, it will light up the anti-theft indicator warning.
While the anti-theft indicator light is lit, it is often accompanied by the failure of the vehicle to unlock, can not start, emergency lights flashing, honking and other fault phenomena, so what are the reasons for the car anti-theft indicator light to light up, and how to solve it?
Causes and solutions of the anti-theft indicator light
First, the remote control key battery is dead, which is also one of the most common causes of failure. Because after the remote control key is out of power, it cannot receive the low-frequency signal sent by the car, nor can it send a high-frequency signal for feedback, resulting in the vehicle not detecting the authentication password of the legal key, and then the anti-theft warning prompt light appears, and accompanied by the failure phenomenon of not being able to unlock and start the vehicle.
Solutions to the causes of such failures: only need to replace the key battery to solve the fault, but for some models that cannot solve the fault after replacing the battery, it means that the data in the key chip is lost, and the remote control key only needs to be re-matched. It is also worth mentioning that if the chip inside the key is damaged, it will also lead to the same failure, and the solution is to replace the key chip and rematch the key.
The second is the damage of the vehicle anti-theft module itself, such as the burning of the triode inside the anti-theft module, the desoldering of the solder joint, etc. will cause the anti-theft indicator to light up, and accompanied by the failure phenomenon that cannot be started.
Solution to the cause of such failure: simply remove the control module of the anti-theft system and repair it. Of course, for modules that are too badly damaged, they need to be replaced to completely solve the fault. In addition, if the wiring harness and plug connected to the control module of the anti-theft system appear to be virtual, short circuit, pin water corrosion, etc., the same failure will occur, and only the wiring harness and pin need to be repaired when solving.
Third, the vehicle has changed the battery, power outage, power loss situation, will also lead to anti-theft indicator light, this is because the vehicle in the power outage, the data stored inside the anti-theft module data loss caused, but this type of failure cause is not all cars will appear, but will appear on a small number of models.
Solution to the cause of such failure: only need to use the diagnostic instrument to enter the anti-theft system to rematch the anti-theft data to solve, and then delete the internal fault code after matching to solve the problem.
In the end, I would like to say that we will often encounter a phenomenon in the daily car, that is, after locking the car, the vehicle's anti-theft indicator will flash, in fact, this is a normal phenomenon, the owners do not have to worry, which means that the vehicle has entered the anti-theft state, if the door is opened illegally at this time, the vehicle will automatically double flash the horn alarm to prompt the owner of the vehicle at this time in an abnormal state.
All in all, there are roughly three reasons for the car anti-theft indicator to light up, namely the key is out of power, the anti-theft module is damaged and the battery is lost, hoping to help the majority of car friends and reduce the trouble of daily use of the car!