What is the reason for one door lock failure in the central locking system?
2 Answers
When one door lock in the central locking system fails, the causes of this malfunction are mostly due to damage to the door lock motor of that particular door, a broken wire causing an open circuit, or possibly a malfunction in the mechanical transmission device. Below is more information about the central locking system: Central Locking: Also known as central control door locks, central locking systems are increasingly installed in many vehicles to enhance convenience and driving safety. Advantages of Central Locking: The wireless remote control feature of car central locking allows for remote unlocking and locking without inserting the key into the keyhole. Its greatest advantage is the ability to conveniently unlock (open) and lock (close) doors from a distance, regardless of whether it's day or night, without needing to locate the keyhole.
I recently fixed the issue with the left rear door lock on my car. When the central control fails and only one door won't lock, it's almost certainly a problem with the door lock motor. The motor is located inside the door panel and is responsible for pushing the latch. If it burns out or gets stuck, the other doors will work fine while this one fails. It could also be that the motor's wiring has broken, especially in older cars that have gone over speed bumps frequently—the wires inside the door panel are prone to wear and tear. Another rare possibility is a glitch in the control module, where signals are sent correctly to other door locks but somehow miss that one door. Additionally, if the door gets damp, the connector interfaces can oxidize, causing poor contact as the copper develops green rust. Last time I fixed my car, I found sand had gotten into the lock mechanism's mechanical structure, jamming the spring and preventing the motor from moving it. So, the inspection steps should follow this order: first, check if the remote control is out of battery, then move on to removing the door panel to inspect the wiring and motor. Don't force the door lock if it's faulty—you might end up damaging the window regulator.
