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List of the contents of this article:

• 1, Several lights are on after car self-inspection
• 2, How does the car computer carry out self-examination and self-diagnosis?
• 3、Two types of self-inspection need to be done after car maintenance

Several lights are on after car self-inspection

There are five indicator lights that light up normally after vehicle self-inspection: engine fault light, EPC and battery indication Lamp. There is also the handbrake indicator light (when it lights up, it means that the handbrake is working normally) and the seat belt indicator light (which lights up when the seat belt is not fastened).The engine fault light, that is, the light on the dashboard that looks a bit like a Super Mary pipe.

The engine fault light is used to show the working status of the engine, and the color is generally yellow. When the car starts, the car enters the self-inspection, the light turns on, and the car starts normally and turns off. Brake system fault light (hand brake prompt light). Generally speaking, the light is on, which means that the handbrake has not been loosened.

The engine fault light is used to show the working status of the engine, and the color is generally yellow. When the car starts, the light will turn on when the car enters the self-check, and it will go out after the car starts normally. Brake system fault light (handbrake prompt light). Under normal circumstances, when the light is on, it means that the handbrake has not been released.

All the lights will go out in turn after the self-inspection of the car.After the car is connected to electricity, the self-inspection begins. All kinds of implementation lights on the dial of the car will light up and will turn off naturally after 2-3 seconds. If the indicator light does not turn off, it means that there is something wrong with the corresponding part of the car indicator light, which has attracted attention to the demand.

After the self-inspection of the car, all the lights go out in turn, and the automatic self-inspection begins after the car is energed. All kinds of realization lights on the car dial will turn on and turn off naturally after 2-3 seconds. If the indicator light does not go out, it means that there is a problem with the corresponding place of the indicator light of the car and needs to be paid attention to.

These parts with lights on must be lit before self-inspection, so they will be on all the time before the ignition. After the engine computer self-examination does not find a fault, it will turn off immediately, which will take about two or three seconds. If the car is faulty and can't be ignited, it can't be said that it's because the fault light is on.

How does the car computer carry out self-examination and self-diagnosis?

It is an electronic device that automatically processes the input signals of various sensors according to the predetermined program in the system, and then outputs the signal to the actuator to control the operation of the car. Self-diagnosis and detection ability, can find faults in the system in time, store fault codes, and inform the maintenance personnel of possible faults for maintenance.

The self-diagnosis function of the car computer means that during the operation of the car, each electronic control unit automatically checks and monitors the working status of each component in the system and the communication status between each electronic control unit at any time.

In fact, self-examination is not what we imagine to check each sensor after the computer is power-on, but a control method. For example, take the oxygen sensor as an example.

There is a preset normal data of each sensor or unit inside the ECU. When the engine is working, the program in the ECU will always compare the actual measurement data and the preset data, and immediately report a failure when an abnormality occurs.

Automotive computer self-diagnosis means that during the working process of the car, each electronic control unit can automatically check and monitor the working status of each component in the system and the communication status between each electronic control unit at any time.

The function of the automobile fault detector can realize the dialogue with the ECU of various electronic control devices in the vehicle through the CAN and LIN communication modules, and transmit the fault code and engine status information.

Two types of self-inspection need to be done after car maintenance

1. This is not the case. Old drivers know that everyone still needs to do "three replacements and two inspections". The third change refers to changing the oil, changing the air filter, and changing the antifreeze. Oil is a necessary oil for the engine to run at high speed. When you have driven a certain distance, you need to change the oil to keep the engine running well.

2. As for the two inspections, the first inspection is the inspection of the brake fluid condition. Brakes are important parts related to safety, so it is necessary to check the performance of this part for safety reasons.

3. In addition, it is very important to check the quality of spray paint. Spraying paint may be the most challenging job faced by maintenance personnel in auto repair shops. Knowing the original factory's color value can ensure the success of 95% of the painting work, and the remaining 5% that can determine the success is to find a really capable person to do it. 6 Finally, negotiate the "aftermath issue".

4. How to identify the maintenance quality of the car after maintenance? One is the inspection when the vehicle is stationary, and the other is the inspection when the vehicle is running. When the vehicle is stationary, it is necessary to park the vehicle on a flat road surface and check the appearance, cab, fuel tank, tires and tire pressure.

5. Cars are "three parts repair" and "seven parts maintenance". It can be seen that its maintenance is very important, and daily inspection cannot be ignored.

6. For example, car owners will definitely encounter large and small car failures in the process of driving. Some need to be checked and maintained in an all-round way, but some can be repaired casually or not a problem, but waste time and financial resources.