What Causes the Door to Show as Unclosed When It's Actually Shut Tight?
2 Answers
The door is shut but still shows as not properly closed, indicating a door sensor malfunction or an increased door gap causing insufficient contact. Relevant information about car doors is as follows: Introduction: The car door provides access for drivers and passengers while isolating external disturbances. It also helps mitigate side impacts to some extent and protects occupants. The vehicle's aesthetics are also related to the door's design. Standards for Door Quality: The quality of a car door is primarily reflected in its anti-collision performance, sealing performance, ease of opening and closing, and other functional indicators. Anti-collision performance is particularly crucial because during a side impact, the buffer distance is very short, making it easy for occupants to get injured.
I've also encountered a situation where the car door was properly closed but the dashboard showed it as open. It took me quite a while to figure it out. The most common cause is the small black button on the door frame being faulty—we mechanics call it the door contact switch. If the door doesn't press it down, it can trigger a false alarm, especially after rain when mud and debris clog it up. Another possibility is misalignment of the door latch. I once worked on a car that had been in an accident where the body panels weren't aligned properly. If there's a short circuit or aging wiring, it's particularly troublesome—you have to check the wiring harness from the door to the car's computer, and it's best to use a multimeter to test the voltage. Personally, I also check if the weatherstripping is too thick and preventing the door from closing properly. Lastly, I'd advise against trying to disassemble the circuit board yourself—it's easy to blow a fuse.
