What is the reason for the abnormal noise from the motor when unlocking the car door?
3 Answers
The reason for the abnormal noise from the motor when unlocking the car door is a malfunctioning door lock switch. Here are the relevant details: 1. Other possible causes: Due to prolonged use, the hinge may produce noise. The car door and the body are connected by a door limiter. When the door is opened to its maximum angle, grease and dirt may accumulate on the limiter arm, limiter pin shaft, and connecting bracket surfaces. The car's sealing strip may have aged, leading to friction sounds, i.e., noise. 2. Door hinge: This is the connecting mechanism between the car door and the body. 3. Door opening limiter: Its function is to limit the extent to which the door can open. On one hand, it restricts the maximum opening angle of the door to prevent it from opening too wide. On the other hand, it can keep the door open when needed, such as when the car is parked on a slope or during windy conditions, preventing the door from closing automatically. Common door opening limiters are separate strap-type limiters, while some are integrated with the door hinge, typically providing limiting functions when the door is fully or partially open.
A while ago, my car's unlocking motor started making a clicking noise, turning every door opening into a thunderous event. This is mostly caused by gear wear or rust inside the motor - frequent use plus dust accumulation often leads to this. Another common issue is insufficient lubrication; lack of regular oiling causes component friction and strange noises. If the wiring connectors are loose or the lock linkage is deformed, the abnormal sounds become more pronounced. Delaying repairs may lead to jamming or complete failure, which would be troublesome in emergencies. I suggest checking the manual for maintenance methods, spraying some silicone lubricant on relevant parts during car washes, or visiting a professional shop for disassembly and inspection if needed - replacing small components isn't too expensive. Don't procrastinate; early fixes bring peace of mind and extend your vehicle's lifespan.
In my experience, door unlocking noises are commonly caused by motor issues, which can be divided into mechanical and electrical aspects. Over time, the internal small gears inside the motor may lack lubrication and age, resulting in squeaking sounds, especially noticeable during cold starts in winter for older vehicles. On the electrical side, if the connectors are corroded or have poor contact, unstable current can cause the motor to vibrate and produce buzzing noises during operation. Sometimes, a loose door lock mechanism can also lead to overall resonance. Although these noises may seem minor, they could indicate more serious problems, such as motor burnout leading to lock failure. It's best to lubricate key points every six months and check for moisture after the rainy season. If you hear unusual sounds, address them promptly to avoid more extensive repairs later.
