Although private cars must be inspected twice a year after reaching 15 years of age, this does not mean that the passing rate is not high except that it is more troublesome. For example, I still have a 2005 Fukang at home, which goes online twice a year, and each time it passes i

Although private cars must be tested twice a year after reaching 15 years of age, this does not mean that the pass rate is not high except that it is more troublesome. For example, I still have a 2005 Fukang at home. It goes online twice a year, and each time it passes in one go, which is too troublesome.

The annual inspection is actually not as difficult as we imagined. As long as you understand the process and items of the annual inspection and perform targeted and appropriate maintenance, it is actually easy to pass the annual inspection.

1, manual inspection

The first item of annual inspection is manual inspection, including vehicle uniqueness inspection, characteristic parameter inspection, appearance inspection, safety device inspection, and chassis inspection.

Here are the following key points to note:

• The fixing screws of the vehicle license plate must be complete, and install as many as necessary. It doesn't matter if the caps on some screws are lost. You can buy them in advance at the traffic police team, vehicle management office or inspection station. There are usually two pairs in a pack, and the price is 5-10 yuan.
• If you change the color of the car body, you must register the change, otherwise you will definitely not pass the annual inspection.
• wheel color change is also not allowed, so it is best not to dress your car in a flashy way, as if it is not mainstream. However, if the steel wheels are replaced with aluminum alloy wheels , they can be inspected normally.
• If the tire patterns of the two coaxial wheels are inconsistent, or if the tire size exceeds the certificate, it is also not qualified. For example, if the pattern of the left front wheel and the right front wheel are inconsistent, or the original car has 175 tires, but you have replaced them with 185 tires, these are all illegal. However, the specific situation depends on the implementation intensity of each place.
• If the tire tread is worn and the depth does not reach 3.2 mm, it will be unqualified. If the tire has a wound larger than 2.5 cm or if the wound exposes the cord layer, it will be unqualified.
• Car lights that are obviously damaged will not be able to pass, so it is best to replace the broken car lights in time. Even if the car lights are not replaced, the damaged areas should be properly treated, so as not to look like they were picked up from the garbage dump. In addition, if the headlights have been modified more obviously, they may not be able to pass. For example, some cars have been modified with angel eyes, , devil eyes, etc., which basically cannot pass. However, those who change the reflector into a lens are generally fine, because the traces of this modification are not obvious, and there is no sense of disobedience with the original car, and it also meets the standard requirements for car light modification.
• A tripod is a must. In addition, cars manufactured after January 1, 2018 must have a reflective vest in addition to a tripod.
• Seat belts should also be inspected. If the seat belts of some old cars are broken, the car owners may simply remove them and throw them away. This will definitely fail the test.
• The engine number, frame number and vehicle nameplate need to be photographed during the annual inspection. If these codes are inconsistent with those registered on the driving license and , it will not pass. Therefore, if your car's engine is changed, you should register it with the vehicle management office and give the new engine a number. Of course, there are also people who put the original engine number on the new engine. This is an illegal operation. If your car's body shell has been replaced, you need to register the change, because it has the chassis number and vehicle nameplate on it.
• The bumpers and roof racks installed by ourselves generally do not affect the annual inspection. But some people have support rods installed on the luggage rack, which are best removed during the annual inspection.
• The car body has embroidery. If the area is relatively large, it will not pass the annual inspection.
• Car windows with mirror-reflective solar films will definitely fail the annual inspection. Films with dark colors generally have little impact.

2, exhaust gas detection

After manual inspection, it is usually exhaust gas detection. The following matters need to be paid attention to for exhaust gas detection:

• The standard for exhaust gas detection is based on the vehicle registration emission standard , which is not the current standard. For example, if your car is registered with National III emission standards and is now in compliance with National VI emissions standards, then the National III emission standards will still be used when testing, as long as your car can meet the National III emission standards.
• Now the exhaust gas detection needs to be connected to the vehicle OBD interface to read the engine data. If the engine fault light is on on your dashboard, the emission fault code will be read after connecting to the OBD. Then there is no need to detect the exhaust gas, and it will be declared failed directly. Because the engine malfunction light is also called the emission indicator light. When it comes on, it means that there is an emission problem, and there is no need to check it.So when you find that the engine fault light is on, you must solve it first, otherwise it will be a waste of time and a valuable online inspection opportunity.
• If the engine fault light is on, you must find a reliable repair shop to find out all the problems carefully and carefully to ensure that the second online operation can be passed in one go. Because according to current regulations, if the exhaust gas test fails and the vehicle still fails to pass after repairs, the vehicle will be forcibly scrapped. This is very important!
• Three-way catalytic converter is an important part of exhaust gas treatment. It determines whether your exhaust gas test can pass. The three-way catalytic converter needs a certain high temperature to function properly, so before detecting exhaust gas, you must make sure that your car's engine is at normal operating temperature. If the stalling time is too long during manual inspection, you might as well hit the accelerator a few more times when checking the exhaust gas.
• Burning engine oil will cause carbon deposits in the combustion chamber and , piston carbon deposits, and poisoning of the three-way catalytic converter, seriously affecting the exhaust gas quality. Therefore, a car that burns oil must be repaired in time.
• Exhaust gas detection requires the engine to work at a relatively high load, but the car is in a stationary state and there is no air convection heat dissipation. Although it is necessary to put a fan on the front of the car to assist with heat dissipation during inspection, some inspection agencies do not follow the regulations, so check the coolant before going for inspection. You can also tell the inspector that my car does not dissipate heat well and ask him to turn on the fan.

3, light detection

light detection is the simplest, but it also has some pitfalls.

• Brake lights, license plate lights, fog lights, turn signals, and double flashers only need to be on, which is the easiest to pass.
• It is necessary to detect the brightness and light illumination angle of high beam and low beam. Some old cars have yellow headlight shades, which will cause loss of brightness and may not pass the annual inspection. Therefore, if you have the conditions before last year's inspection, you can buy a set of headlight repair fluid to repair it yourself, or directly buy a lampshade to replace it. The lampshades are sealed with butyl glue and can be removed after being slightly heated. In addition, some halogen headlight lamp beads will lose filament after being used for a long time, which will also lead to a decrease in brightness. You can replace the lamp beads with new ones before testing, which is not expensive and is good for daily driving safety.
• Car body retro-reflectors also need to be checked, which are those devices on the car body that do not light up by themselves but will reflect light when exposed to light. If there are any missing ones, they must be replaced in time. Many people don't pay attention to this, and as a result, things will be delayed.

4, sideslip detection

Sideslip detection is to check the lateral deflection trend of the tires when the vehicle is driving. I think this is a very necessary detection, because it is directly related to the safety of our high-speed driving and braking. Many people don’t know what sideslip means. To put it simply, sideslip means running off track.

Due to the geometric angle of the suspension, the wheels do not stand squarely and steadily on the ground. This is what we often call wheel alignment. Among the wheel positioning parameters, if the toe angle and camber angle are abnormal, the rolling direction of the two front wheels will deviate when the car is driving, and the higher the vehicle speed, the greater the deviation will be, which will affect the stability of high-speed driving and increase tire wear.

During detection, the car will drive past the detection platform at a relatively low speed, and the sensor can detect the amount of sideslip. If the sideslip test fails, it can be said to be a blessing among misfortunes, because although it fails, it allows you to discover serious hidden dangers in the vehicle in time, which is directly related to our personal safety. If the sideslip fails, generally a four-wheel alignment will be enough.

Generally, as long as the front wheels of your car have not been hit and the suspension system has not been touched, the sideslip detection can be easily passed. But remember to check the tire pressure before the test to ensure that the tire pressure is consistent, which will help pass the test.

5, brake detection

Brake detection is also very meaningful, because professional equipment can indeed detect some hidden diseases of the braking system, and these hidden diseases are not so easy for us to detect at ordinary times, but in an emergency they may increase the risk of our driving.Generally, there won’t be any big problems when testing the brake system, but you still need to pay attention to the following factors.

• Make sure the tire pressure is consistent before testing.
• Some handbrake cables may stretch due to their long service life, causing handbrake to be pulled to the end but the braking force is not enough, which may not pass the handbrake detection. It should be adjusted in advance.
• Check the brake fluid. If it is lower than the standard scale, add enough. Because the brakes will be pressed all the way during the test, too little brake fluid may result in insufficient braking force and failure.
• Poor brake return may result in failure. The inspection method is very simple. When the car is cold, step on the brakes firmly, then release the brakes and drive for a short distance at low speed to let the car stop by itself. Then look at the temperature of brake disc . If a certain brake disc is hot, it means that the brake return of this wheel is not good. The simplest method is to use the lift to lift the vehicle, lift the four wheels off the ground, then step on the brakes, release the brakes and turn the four wheels by hand. Under normal circumstances, the wheels will rotate freely after the brakes are released. If a wheel has great resistance to rotation, it needs to be checked and solved. It is usually caused by the jamming of the brake caliper guide pin. Generally, it can be cleaned and lubricated.

In fact, there are many details in car inspection, and many of the problems that fail the inspection are mostly due to problems in the details. Therefore, we old car owners don’t have to worry too much. We usually do a good job in maintaining the car, solve problems in time, and don’t turn small problems into big problems. Generally, if we do this, there will be no problems during the annual inspection.