What does the BYD door switch mean?
2 Answers
BYD door is a passive safety configuration. It serves as a dome light switch with safety warning functions for both the vehicle and pedestrians. The following are the main warning functions of the door: Specific manifestations: When the dome light switch is set to door mode, the dome light will illuminate when the door is opened. When the dome light is on, there will be a system prompt sound, the blind spot lights on the rearview mirror will flash, and the ambient light of the opened door will turn red and flash. If the door is opened or not closed properly, the dome light will also illuminate, turn red, and flash continuously, while the ambient light changes color, ultimately serving as a warning to alert both the vehicle and pedestrians.
When I first bought my car, I didn’t understand it either. The BYD door switch actually refers to the sensor on the door, which detects whether the door is open or closed. For example, when you open the door, the interior light automatically turns on; it turns off once the door is properly closed. In BYD models, this small component is connected to the body control module, ensuring the alarm system functions correctly after locking. If it malfunctions, the light might not work or the alarm could go off randomly, requiring a check at the 4S store. For beginners, I don’t think this is a complicated issue—just avoid spraying water directly at it during car washes and keep it dry. Overall, it’s a handy little helper that makes getting in and out of the car more convenient and safe. I recommend checking for loose connectors during regular maintenance—it’s simple upkeep.
