The function of the rear door of a car
The main functions of the rear car door include controlling the door opening and closing, window lifting and lowering, child safety lock function and automatic locking while driving.
Control the door opening and closing
The rear door switch is used to control the opening and closing of the doors, facilitating passengers' getting on and off the vehicle. Some models' switches are also equipped with a child lock function. Once activated, it can prevent children from mistakenly opening the door and only allow it to be opened from the outside of the vehicle.
Window lift control
Some rear door switches are integrated with window lift buttons, which can control the lifting of the corresponding Windows. For instance, after pressing the switch, only the driver's side door glass can be operated, while the other door glasses cannot be raised or lowered. Pressing it again can unlock it.
Driving safety protection
The door lock switch will automatically lock when the vehicle is in motion to ensure the safety of the occupants. When the vehicle speed reaches the set value, the car door will automatically lock to prevent it from opening due to accidental operation.
Independent locking function
Some models are equipped with separate spring lock switches for the rear door switches, which can independently control the opening and closing status of individual doors, enhancing the convenience of use.
The damage to the rear door of a car needs to be handled according to the specific situation:
Judgment of the degree of damage
If there are only surface scratches or slight depressions, you may consider self-repairing or taking it to a professional repair shop for painting. If there is metal deformation, cracking or internal structure damage (such as lock blocks, elevators and other components), it must be handled by professionals; otherwise, it may cause safety hazards.
Common Fault Handling
Youdaoplaceholder0 Child lock activation : The side switch of the door is in the locked position. It needs to be unlocked and then opened from the inside.
Youdaoplaceholder0 Lock block/pull wire fault : It is manifested as the car door being unable to open and close normally. It is necessary to check the lubrication or replace the lock block component.
Youdaoplaceholder0 Aging of the sealing gasket : The gasket becomes hard and hinders the opening of the car door. A new gasket needs to be replaced.
Youdaoplaceholder0 Remote key failure : You can try a mechanical key or a spare battery. Contact a professional if necessary.
The solution for the situation where the rear door lock of a car cannot be opened from either the inside or outside:
When encountering a situation where the rear door lock of a car cannot be opened from either the inside or the outside, it may be caused by a variety of reasons. The following are possible causes and corresponding solutions:
The lubricating grease inside the lock block has solidified: Parking the vehicle in the sun to melt the grease usually solves the problem.
The lock block is damaged: This requires inspection and replacement at an auto repair shop.
Loose or fallen pull wire: This is a common phenomenon. Just open the door and remove the interior panel to replace the pull wire.
Improper door position or malfunction of the locking mechanism component: Try hitting the door or having multiple people push and pull together to see if the door can return to normal.
Try to lower the car window: Use a hook or other tools to pull or push the connection part between the door cable and the locking machine to see if the door can be opened.
Disassembling the door panel: As the car door cannot be opened, disassembling the door panel is rather difficult. It is recommended to go to a repair shop and have a professional handle it.
When conducting daily maintenance, the following points should be noted:
Avoid the door lock coming into contact with water to prevent rusting.
The use of lubricating oil should be moderate to avoid excessive use which may cause caking.
Keep the car door glass sealing strip well sealed to prevent rainwater from seeping into the lock block.
Regularly inspect and add a small amount of lubricating oil to the lock block to ensure its lubricity.
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