Nowadays, cars are built more and more relying on the control of electronic systems. Engines, gearboxes, automotive air conditioning, braking systems, steering systems, and door and window systems are all applications of electronic systems and sensors. And these sensitive parts are most prone to failure.
Therefore, there are more and more small car faults. As soon as the fault occurs, it will show you a fault code. Some fault codes can't even be understood by automobile maintenance engineers, let alone a car like ours.
But some small electronic mechanical devices Xiaobai can also solve by himself, which not only strengthens the understanding of cars but also is the most desired thing for some hobbyists who like to operate.
Today, my friend’s Volkswagen Lavida’s electric window could not be raised and lowered, so I specifically asked me to handle it.
I opened the car door and pressed the lift switch. The glass couldn't rise or fall at all, and it was stuck there and couldn't move. But when you put your hand on the glass, you can feel that the glass has a feeling of wanting to rise but not being able to rise.
Put your ears close to the car door and you can hear the buzzing of the electric motor inside. This proves that the electric motor is not broken. It may be that the lifter is broken.
Together with a friend, I removed a few small screws from the door panel, then gently pried the door panel open, unplugged all the wiring plugs, and revealed the integrated steel cover inside.
There is no soundproof cotton in the door of my friend's Lavida, so the soundproof effect is not very good.
Because it is an old model that has been driven for 100,000 kilometres, I don’t know if there is sound insulation cotton for the new models. The price of this layer of sound insulation cotton is not very high. Why don’t the manufacturers configure it?
Then remove the formed steel cover, and all the glass lifters inside are revealed.
The transmission mechanism of electric window lifter has two types: rope wheel type and cross arm type. The rope wheel type is relatively more complicated. It is a ring-shaped wire rope that can drive the wire rope through the positive and negative rotation of the motor. The glass holder moves up and down. Lavida's window lifter assembly is relatively powerful, and it belongs to the rope wheel type.
Rope wheel electric lifter
This type of cross-arm type is simple and easy to maintain. After disassembling the lifter, it is found that the steel wire is seriously worn and rusty. All four wire wheels are worn and deformed. The wire rope has fallen off the outside of the wheel. Then disassemble the motor lifting kit, The internal structure is also severely worn, the winch has a bayonet gap, and the steel wire cannot be hung. Even after the motor rotates normally, the window glass is stuck and cannot be raised or lowered.
Except that the motor is still a lever, the lifter assembly almost has to be replaced. Contact the 4S shop, there is no stock, and installation will take three days. My friend found one on JD. After confirming with the customer service, it was shipped, and it arrived the next day.
The installation is very fast, it will be installed in less than half an hour, and all the movable parts are sprayed with WD40, which plays a role in lubrication and rust prevention.
After being installed, it was tested and it was very smooth, and the stalling sound of the motor was gone, and the effect was very good.
Why spray WD40? Because this thing has a high safety factor and is non-conductive, it can be sprayed directly on the circuit board.
There is also that it is not easy to stick to dust. Also, if you use grease, dust is most likely to stick to it, and it will be a large group of bumps in a short time, which is not conducive to walking with a wire.
Finally, I cut a thin piece of sponge from an old bag and added it as sound-proof cotton. I covered it with the outer cover. I felt that the noise was indeed lower. My friend said it was a good creative idea.
If you want to keep the inside of the car door dry, the water diversion hole below should be cleaned and cleaned frequently to keep it unobstructed, so that even if it rains, there is no fear of water in the door.
Another thing is to keep the car windows clean and remove dust and advertising paper stuck on the windows in time to prevent the dust from falling off. Therefore, always keep the car windows clean to extend the service life of the electric lifter.