Why does the car need to be powered on and self tested before ignition?

Some older drivers say that it is better for the car to power up the car before driving, i.e. turn the ignition key to the ON position, wait for two to three seconds, and then turn the key to the start position after the self-test is complete. Is it necessary to do this? First of all, there are certain benefits to doing this, but if you don't, it won't damage your car.

What are the benefits? Wait two to three seconds to turn on the power, not only for the self-test, but also for the pulse of the pump. Once turned on, the pump will run for two to three seconds.

At this time, listen carefully and you will hear a squeak, which is the sound of the oil pump. After two or three seconds of work, it will automatically stop with the aim of establishing sufficient oil pressure, which is more conducive to ignition.

After a period of shutdown, a small amount of gasoline in the pipeline will flow back into the tank, causing the pressure inside the pipeline to decrease. If you open the pipe directly, pressure will build up over a period of time, and this pressure may not appear at one time or for a long time, especially for older cars. It's like changing a gas filter.

You'll need to play two or three times to get started. Since there is no pressure in the pipes, the pipes must be filled with gasoline before starting the car.

Similarly, when you are driving, driving the computer is like a commander who will command all the parts of the car to work properly. Just like the brain of a car, a driving computer can not only reasonably control the car's work, but also allow for self-examination at any time. There is also a testing department in the car, which is the various departments of the sensors.

In fact, it is this department that transmits the signal to the car's computer. When you drive, each sensor will start working.

Another benefit is that you can look at the fault lights in your car and learn about them. The point is that everyone should self-test. If the fault indicator does not light up during the self-test, it indicates that there is a problem with the system.

The instrument or sensor itself may be defective and needs to be repaired. Because the self-test is not excellent, there are absolutely no errors.

With the development of automotive technology, from thousands of economy scooters to millions of luxury cars, there is a self-test function that can help you detect all vehicle dynamics at any time, so the so-called self-test it is not only done before starting, but in the event of a breakdown, we don't have to worry about losing the fault**. Usually, the car can be started by simply pressing the start button. If you see the fault light coming on, if there is no emergency, it is best not to force the vehicle to start and judge the situation after a professional inspection.

Therefore, you don't have to press the button before starting with the vehicle button, just press the brake and start.

Waiting for two or three seconds for the power on is not just waiting for the self-test, but also waiting for the oil pump to establish pressure. After the power is on, the oil pump will work for two or three seconds, and at this time, you can hear the buzzing sound if you listen carefully, which is the sound of the oil pump working. It will automatically stop after two or three seconds of work, and the purpose is to establish sufficient oil pressure, which is more conducive to ignition.

After the car is parked for a period of time, a small amount of gasoline in the oil pipe will flow back to the fuel tank, resulting in a drop in pressure in the pipeline. It's like just changing the gasoline filter, it takes two or three times to play, because there is no pressure in the pipeline, and the pipeline must be filled with gasoline before the car can be started.

Normal ignition steps, first insert the key, turn the power, after the car equipment self-test (about 5 seconds), the corresponding red and yellow marks are extinguished, and then you can start the ignition, which is good for the car.

After the power on self-test, there can be enough oil pressure, which is conducive to ignition.

If there is a problem with the electrical circuit, a rash ignition can cause damage to the vehicle. There is a possibility that the flame will stall.

Because this is waiting for gasoline to be delivered to the engine, ensuring good power.

It is to protect the car, but also to reduce traffic accidents to protect yourself.

It is to let the car work on its own first to avoid accidents and damage to the car.

The main thing is to prepare the car, otherwise it will be dangerous to ignite it directly.

This may be for the sake of driving safety and also to avoid damage to the car.

Because before ignition, power on the self-test to see if there is any problem, which will rule out some potential safety hazards.

Yes, so that the safety of the car can be ensured, and the safety of personal life will not be affected by the failure of the vehicle when driving.

Of course, you have to carry out a self-inspection, if you don't self-check, there will be risks during driving, mainly to check whether there are obstacles and small animals around the tires and the body.

Yes, so that there will be no other accidents, and a self-check function like this is very necessary, and it can also check for problems with the car.

Of course, yes, because if you haven't opened it for a long time, you must check it in advance and then ignite it, so that it will be safer.

Of course, it is necessary to check before ignition, so that no accidents occur.

Of course, it is necessary to carry out an inspection, because this will better prevent the car from being threatened.

You put the car key into the ignition hole has four gears, the third gear is called turn on the gear key, your position of the whole car circuit will be turned on, and do about three seconds of self-test before starting the engine, all kinds of icons on the dashboard will light up, after the self-test is completed, it will be extinguished one after another. Some veteran drivers say that before starting the car, it is best to wait for this self-test to be completed before starting the car, which will be better for the car.

Let's talk about the conclusion first, there are certain benefits to doing this, but if you don't wait for the end of the self-inspection, you will not be able to ignite the fire and walk away, and it will hurt the car. In fact, in the earliest carburetor era, the car did not have a self-test function, and later because the carburetor needed to warm up the car in winter, it always dropped the chain, and it was replaced by an EFI engine in 2001. Since it is EFI, it is necessary to install a driving computer on the car to control the amount of fuel injection, and the prerequisite for the ignition of the EFI car is that the car must be in a state of power-on, so the designer of the car will divide the car into two steps for electrification and ignition.

And a short self-test before the car is powered on is more like a delay in time to get the car ready for ignition. First of all, we need to know that the purpose of the car self-test is to power on all the electrical circuits before starting, and detect whether there is any problem with the interior of the car, so as to predict the fault or risk in advance, which is the same as what we often say before driving around the car to check the same reason, but we check the external environment of the car, and the self-inspection system is to check the internal environment of the car, airbags, etc., and intuitively reflect whether it is normal through the icons on our dashboard.

If you don't wait for the end of the self-inspection, on the ignition, in fact, there is no big problem, because the purpose of the self-inspection is to find out the problem, if the car itself does not have any faults, self-inspection and non-self-inspection for us is not so significant, but the interior of the car, there is no problem, many times, our car owners do not know, if you skip the process of self-inspection for a long time, it is easy to miss the best time to find the problem.

In addition, some car owners said that after the car is parked for a period of time, the gasoline in the oil pipe will have a small amount of backflow to the fuel tank, resulting in a drop in pressure in the oil pipe, and so on for two or three seconds, it is not a simple self-test, or waiting for the oil pump, to establish pressure, in general, the car is powered on before starting, which can help us quickly find the fault of the car, if it is not a particularly urgent situation, it is recommended that you wait a few seconds, after all, many of us have not been able to do it, before driving around the car to check, If you don't even want to wait a few seconds for a self-test, wouldn't it be even harder to drive safely?

There is no need to wait for the self-test to be powered on, and direct ignition will not hurt the car. If self-test is really necessary, then the car manual will say that it is necessary to power on the self-test before starting; But in fact, it is not written in the manual.

No, the power-on self-test and starting the engine are at the same time, so starting the engine is the process of powering up the vehicle at the same time. If the engine is successfully started, the self-test is completed, and if it is unsuccessful, the self-test fails and needs to be re-ignited.

I think of course it is, at this time the ignition will not hurt the car, but the start time will be longer.

What self-tests do you need to carry out before the car is ignited? Let's see what is an automated computer autotest. Today's automobiles are basically mechanical products, with machines as the basis for operation and electronic control as the means of control.

Basically, various functions are realized through electronic control systems, such as engine operation, automatic transmission replacement, various auxiliary braking functions, electric steering power supply, body stability control, air conditioning system, body accessory control system, etc.

<>In order to perform electronic control functions, various sensors are installed in different parts of the vehicleIn fact, I would like to describe the self-check action before the vehicle starts; For example, when you turn on the mechanical key, you can turn on all warning lights and dashboard fault lights. If all are normal after the self-test, the fault lamp can be turned off, and the fault lamp will always be on and continue to turn on after ignition. This is the vehicle testing process.

Some experienced drivers say that it is best to start the vehicle before starting it, i.e. turn the ignition button first, wait two to three seconds, and then turn the key to start the vehicle after the automatic test is complete. Before starting the vehicle, the following inspections must be performed: Before entering the cab, check the environment around the vehicle.

Check for obstacles or risk factors. Then check if the tire pressure is normal, whether there is external damage, whether there is liquid loss on the ground, after entering the cockpit, close the doors, adjust the seat position and the angle of the internal and external mirrors, and fasten the seat belt to ensure a comfortable and safe driving. Check if the handbrake is tightened, switch to neutral (automatic braking step, P or N), turn on the switch and check if the combination panel indicator is on.

Turn on the switch before you go, and remember not to start the car directly before use. You can turn on the switch first, and when the switch is on, the vehicle will generally perform a self-test, and all the indicators will light up at the same time. After self-examination, they will close one by one.

The duration of this process is usually about 3 seconds. After the inspection, the vehicle can be started safely. When using a car, we must be careful not to drag the tool while driving.

When the engine shakes, we should reverse in time. Dragging the gears puts too much strain on the engine.

Let me tell you about this one-click start problem.

At that time, the car I bought was a one-button start, and every time I started, I had to follow the start method told to me by the sales staff of the car 4S shop:

Press the AC key to power on first, then press the AC key to turn on the ON switch, and then press the AC button to press the brake pedal while the car completes the self-test, then the car will start, and you have to wait every time.

Twenty or thirty seconds. At first, I didn't think it was too much trouble, but after a long time, I felt that it was a bit too late, especially during the two time periods when I was in a hurry to go to work and when I was in a hurry to go home from work. So I consulted a few professional car repair friends, and their answers were almost the same:

The car can be started by pressing and pressing the brake once, or you can press three times to start, there is no problem, as long as you wait a few seconds before the car starts, and then start the vehicle after the car self-test is completed, there is definitely no problem! So since then, I've been pressing the AC button and pressing the brake at the same time to ignite directly, already.

It's been six or seven years, and there hasn't been any problems with the car.

Friends, let me tell you why this is. As we all know, the one-button start device of the car is now used as a part of the smart car to realize the whole process of simple ignition and ignition. Many car manufacturers are already using this smart device to increase the competitiveness of marketing, because it is more convenient and faster to start than traditional mechanical keys, and it also saves a series of troublesome operations such as finding, inserting, and screwing keys, and the one-button start function is more eye-catching.

Then why do some people say that the car with a key start should be pressed three times, how to be good for the car, how to be good for the engine! In fact, this statement is not trueBecause the engineers of the automobile manufacturer have considered all the problems you can think of for you before the car leaves the factory, the actual one-button start process is that the engine is self-checking, checking whether the vehicle is faulty, such as oil supply system, braking system, braking system, etc., when we press the brake pedal and press the start button AC key, the driving computer completes the self-test in just a few seconds, and there is no need to power on the self-test first.

Friends, now you understand! The car can be started directly at one time, or it can be pressed three times, and the car can drive away directly after completing the self-inspection。If you press the brake once and go directly to the ignition, it will never cause any harm to the vehicle, nor will it damage the engine, let alone the car battery.