May 20, 2024

The main cause of malfunction of automotive electronic circuits

The main causes of automotive electronic faults are as follows:

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Adding electrical appliances privately causes line failure:

Now many private cars like to install some electronic settings on the car, such as car alarms, audio, etc., because the construction technology is not professional, it will cause the wrong connection of the line, or the original line load will increase, resulting in short circuit, causing The electronic system is faulty and can even cause a fire.

Improper human operation causes malfunction:

For the electronic components inside the car, it is best to look at the instructions before use. Master Wu said that some electronic faults are caused by the owner's failure to understand how to use and set up, and wrong operation. In addition, when operating the control switch or panel, be careful not to use too much force.

Improper car wash causes problems:

Some owners like to use water to rush the engine, which is very dangerous. Because some of the engine components are very afraid of water, it is easy to cause the electrical sensor and the traveling computer to malfunction when flushing with water. Similarly, in the summer rainstorm, when the vehicle is over water, the engine or electronic components are soaked in water due to carelessness of the water, resulting in a short circuit of the electronic component line, causing problems in the automotive electronic system.

Lack of maintenance causes failure:

Automotive electronics are structurally divided into sensors, control units, actuators, and connecting wires/data lines. Automotive electronic faults are also closely related to the normal operation of these four aspects. These components in the automotive electronic construction are very precise, and have high requirements for the use environment. However, the lack of maintenance and cleaning of electronic components that are common among vehicle owners has become an important cause of failure.

As the information source of automotive electronic control system, automotive sensor sensor is a key component of automotive electronic control system. If it is contaminated by dust and other impurities, it may cause the sensitivity and precision of the sensor to decrease, and even the distortion of the sensing signal may occur. Therefore, the vehicle control unit and the actuator are malfunctioning and cannot travel normally.

A car that uses an electronic instrument to connect the wires requires a lot of connectors to connect the wire harness to the instrument panel. However, once these connectors are wetted or eroded by water, they tend to oxidize the connecting wires, resulting in poor contact. The inspection can be carried out by eye or hand touch. The connector device should be complete and intact, and the plug and socket should be in contact with reliable and rust-free. In the operation of the instrument circuit, the connector should be touched by hand. There should be no obvious temperature feeling. If the temperature is too high, the connector is in poor contact, and the cause should be identified.

Failure to repair professionally leads to failure:

When there are more and more electronic products on the car, the requirements for vehicle maintenance are becoming more and more professional. If the electronic circuit is disorderly disassembled, it is easy to cause wiring errors and damage to the control unit, so that the vehicle cannot operate normally.

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