The car central control lock is a switch button located next to the driver's seat. After the driver presses it, the driver alone can control the door locks of the other three doors. On the contrary, each door can be controlled independently. This "central door lock" control device has been assembled on cars as early as the 1970s, and has been widely used after more than 20 years. As the control device of the car, the central control lock may also malfunction. The common situation is that the central control lock fails and the door cannot be locked.
There are still many types of central control locks on automobiles, but the basic components mainly include door lock switches, door lock actuators, and door lock controllers. The failure of the central control lock causes the door to fail to be locked, usually due to the failure of the door lock actuator and the door lock controller. If there is such a situation, we recommend that the car should be inspected in a repair shop in time, and the fault information can be quickly detected by the detector.
Diagnosis of failure of four door lock devices
First, check whether the installation of the parts, components and connecting wires is correct, and then check whether the connection between the power cord (live wire) and the ground wire and the battery is secure. If there is no abnormal condition, it means that the electronic control switch box is faulty, the lock switch is damaged or the circuit is faulty, and each part needs to be carefully inspected.
Only one or two door lock devices do not work
The cause of this failure is mostly the damage of the door lock motor of the one or two doors or the open circuit failure of the wire, or the failure of the mechanical transmission device.
The door lock device of the four doors can only be opened or can only be locked
The cause of this failure is that the door lock switch is damaged or a certain group of switch circuits in the electronic control switch box is faulty
The door lock device of the four doors is automatically locked after opening or automatically opened after being locked
The cause of this failure is that the door switch is damaged or the circuit is faulty
Battery escape fault detection
When the vehicle is stationary (no electrical appliances are used), the battery power consumption measured by the ammeter is less than 0.5A, indicating that there is no power escape phenomenon.
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