HS code-based tariff calculations

List of catalogs of this article:

• 1,HS code-based tariff calculationsAutomotive instrument engine fault light is on, how to detect fault and maintenance
• 2,How to overhaul the failure of the automobile engine
• 3. Common inspection and solution of automobile maintenance failure
• 4, What is automobile testing and maintenance technology?
• 5, 10 signs that car engines need to be repaired
• 6, What knowledge does the maintenance and inspection of automobile professionals include?

The fault light of the engine of the car instrument is on, how to detect faults and repair

Sensor problems The sensors mentioned here mainly include the position of water temperature and In places such as air flow and oxygen sensors, once these sensors are damaged, it is likely that poor contact or signal interruption will occur.

You can go to the decoder to repair the car electrical appliances to retrieve the fault code, and then repair it accordingly. Generally, it costs about 30 yuan for one test. If your car has no fault or has recently unplugged the electrical plug, there may be a fault code, but it will not affect it. You can disconnect the battery cable for about 5 minutes, and the fault code inside will disappear.If it's still bright.

If there is a problem with the air intake system, there will be poor combustion, and the engine fault light will turn on.

Generally speaking, there are two situations when the engine fault light is on: 1. The yellow symbol light indicates that the engine is faulty, but the failure does not affect the normal operation of the engine, but it is necessary to check and repair; the red symbol light indicates that the engine has a serious failure, and under normal circumstances, it needs to be repaired immediately.

Start and turn off the vehicle three times in a row. Turn off the ignition and pull out the negative pole of the engine battery, wait for 30 seconds to connect it, and then try to start. It can be eliminated after using the fault detector to troubleshoot at the 4S store.

How to overhaul the fault of the car engine

The main reasons are that the car engine is overloaded, the cylinder pressure is insufficient, the engine temperature is too low, the carburetor is improperly adjusted, the air filter is blocked, individual cylinders do not work and the ignition is too late, etc.

Check the dividing line between the spark plug and the cylinder. Whether the spark plug gap meets the original technical standards, and whether the resistance value of the cylinder wire also meets the technical requirements, if not, it needs to be adjusted or replaced. Test the fuel pressure system. Check the fuel pressure gauge and fuel pressure gauge assembly, and connect the oil pipe and fuel gauge. Start the engine and let it run at idle speed.

If there is a lot of coolant, you should troubleshoot the engine thermos and fan radiator. The problem of engine overheating requires car drivers to master basic common sense and maintenance methods. The engine should be regularly maintained and inspected.

Car engineCauses of oil burning and maintenance methods. The performance of engine oil burning. The main manifestation of engine oil burning is blue smoke from the exhaust pipe. At idle, the engine will shake, and the engine oil is seriously lacking (no dripping phenomenon) in a routine maintenance (oil change) cycle.

Question 1 The engine cannot start or the engine does not run, and the engine runs but does not work. Solution: A preliminary judgment can be made by listening to the sound of the car horn and turning on the headlights. Phenomenon 1: If the horn is hoarse and the engine does not run, the battery should be checked at this time.

If there is an engine failure, you should pull over or drive to the nearest service area to stop, observe the engine status self-check light, observe whether the engine coolant temperature is too high, and check whether the engine lacks oil.Observe whether the engine is running smoothly. If the above conditions exist, you need to go to the nearest auto repair shop for repair.

Common inspection and solution of automobile maintenance failure

1. Visual inspection method Visual inspection method is to check only through the eyes or other sensory organs and the application of necessary tools without the help of instruments. Check the appearance of car electrical appliances. Before observing the failure of automobile electrical appliances, solve some appearance problems. It's too late to observe other faults.

2. I) Use the method of looking and asking to diagnose faults: doctors need to "look, hear and ask" to see a doctor, and the same is true for car fault diagnosis. Among them, looking and asking are effective ways to quickly diagnose car faults.

3. Solution: You should go to the repair shop for replacement and repair in time.Unscling the radiator cover, I found that there were always some oil stains floating on the water, and there was moisture when changing the oil. Cause analysis: The engine has two circulation systems, one is the coolant circulation system and the other is the lubricating oil circulation system. The two systems are not connected to each other.

What is automobile testing and maintenance technology?

1. Automobile testing and maintenance technology is an indispensable and important work in the current automobile industry. With the popularization of automobiles and the continuous updating of technology, the fault diagnosis and maintenance of automobiles have become more and more complex and refined. The following will introduce some key aspects of automobile testing and maintenance technology. The first is the technology of automobile fault diagnosis.

2. The major of automobile testing and maintenance technology is a major that trains students to engage in automobile inspection, fault diagnosis and maintenance.This major focuses on cultivating students' practical ability and innovative ability, so that they can master the principles, detection and diagnosis methods of automobile systems, be familiar with common fault handling techniques, and have the practical operation ability of automobile repair and maintenance.

3. Automobile inspection and maintenance technology is for auto repair and automobile maintenance. Mainly, you can go to automobile manufacturing factories, automobile modification factories and automobile maintenance enterprises to engage in automobile inspection, maintenance and marketing, and to engage in automobile inspection, maintenance, marketing and other technologies and management work.

4. The main courses of automobile testing and maintenance technology major are machinery manufacturing and automation, automotive electrical and electronic technology, automotive parts drawing recognition, automobile disassembly and adjustment, automobile starting, mechanical system overhaul, automobile engine electronic control system overhaul, automobile chassis system overhaul, automobile electrical system Overhaul, comprehensive fault diagnosis of automobiles, etc.

10 signs that car engines need to be repaired

1. Fourth: send The motive is overheated. When the engine is overheated, it will cause the metal parts to expand and warp, resulting in damage to the cylinder head washer, warp of the cylinder head and rupture of the engine cylinder block. It will also cause safety hazards, and may cause fires and increase emissions.Overheating may also include a strong smell of steam or coolant coming out from under the hood.

2. Judge the cause and overhaul of car engine burning oil. The main manifestation of engine burning oil is blue smoke from the exhaust pipe. At idle, the engine will shake, and the engine oil is seriously lacking (no dripping phenomenon) in a routine maintenance (oil change) cycle.

3. In the process of driving, the engine lubricating oil consumption of the car is also higher than usual. For a period of mileage, the dashboard soon shows that the amount of lubricating oil is insufficient. This situation is usually due to the following three reasons: First, it may be due to the sealing problem of the engine piston, resulting in the piston and gas The gap in the cylinder wall is too large, resulting in the phenomenon of burning engine oil.

4. Engine temperatureSuddenly too high. When the car is driving, if the water temperature gauge is above 100℃, and the temperature of the engine coolant rises rapidly to boiling, the temperature will become normal after adding coolant, but the engine power will drop significantly.

5. Repair the oil supply system: If it is found that the fuel consumption has increased, accompanied by engine shaking, power degradation and other problems, it may be caused by the failure of the fuel supply system. At this time, it is necessary to check the oil supply system, determine the cause of the failure and repair it in time. Engine oil leakage Engine oil leakage may cause vehicles to pollute the environment, damage the engine and other problems.

6. Solution: You should go to the repair shop for replacement and repair in time. Unscling the radiator cover, I found that there were always some oil stains floating on the water, and I found that there was moisture when changing the oil. Cause analysis: There are two major factors in the engineThe ring system, one is the coolant circulation system and the other is the lubricating oil circulation system. The two systems are not connected to each other.

What knowledge does the professional maintenance and inspection of automobiles include?

1. Automobile inspection and maintenance major is a discipline to cultivate high-quality skilled professionals who have the ability of automobile inspection, operation, maintenance and technical management, and have the basic knowledge and professional skills required for professional positions (groups) and have been preliminarily trained by automobile maintenance engineers.

2. Automobile repair and maintenance: Students will learn the techniques and methods of automobile repair and maintenance, including the disassembly, replacement and debugging of automobile mechanical parts and electrical parts. They will understand the basic requirements and safety operation specifications of automobile maintenance operations, and be familiar with the maintenance processes and methods of common faults.

3, 1 Based on experience identification, that is, the mechanical maintenance and maintenance staff judge the machinery used in the manufacture of auto parts based on the experience summarized by many years of work, including the type of machinery, the operation status of the machine, etc.

4. Courses such as automobile comfort and safety system overhaul, automobile comprehensive fault diagnosis and elimination, automobile sheet metal and spraying, automobile new energy technology, automobile insurance and claims settlement. Graduates are employed in automobile 4S stores and related industry enterprises, engaged in automobile mechanical and electrical maintenance, whole vehicle or accessories sales, insurance company vehicle damage determination, etc.

5. Main employment positions: automobile production, professional maintenance, sales company, testing station, transportation company, automobile operation and other departments engaged in automobile inspection and maintenance, automobile operation and management, automobile marketing and evaluation, auto parts sales and related technical services.

6. Hello, automobile inspection and maintenance mainly studies the basic knowledge and skills of the structure, fault diagnosis, inspection and maintenance of automobiles, mechanical systems, transmission systems, brake systems, electrical systems, etc., and carry out inspection, maintenance, evaluation, etc. of automobiles.