What is the reason for BYD's alarm to keep ringing?
2 Answers
BYD's alarm keeps ringing due to a faulty door contact switch, which can also cause the alarm to sound. It is necessary to go to a repair shop for maintenance. The sensitivity of the anti-theft sensor is too high. There is a sensitivity adjustment knob on the anti-theft vibration sensor, which can be fine-tuned. Alarm working principle: When the sensor is struck or shaken, the ball inside the chamber will roll. When it rolls away from a smaller secondary electrical contact element, the circuit formed by this secondary electrical contact element and the central electrical contact element will be disconnected. Controller ball displacement: At this time, the switch will open, indicating that the controller ball has been displaced. As the ball continues to roll past other secondary electrical contact elements, the circuit will repeatedly close and open until the ball finally stops rolling.
It can be quite annoying when the alarm on your BYD suddenly goes off incessantly. I've encountered this situation several times. The most common cause is when the doors or trunk aren't closed properly, making the system think someone is breaking in. Last time this happened to me at a gas station, it turned out the trunk wasn't fully closed because it was overloaded with luggage. Other situations like accidental key fob presses or dead remote battery can also trigger false alarms. Also pay attention to the sensitivity of the vibration sensor - sometimes even vibrations from passing trucks can set it off. If the battery voltage is unstable or aftermarket electrical equipment isn't properly wired, it can also disrupt the alarm system. If you can't find the cause, you might try disconnecting the negative battery terminal for half a minute and reconnecting it, which essentially reboots the system. Just remember to reset the one-touch window function afterward.
