What is the working principle of a car central locking system?

How to Deal with Abnormal Noise When Starting and Braking a Car?

Here are the solutions for abnormal noise when starting and braking a car:1. New car or recently replaced brake pads producing abnormal noise: Generally, this occurs because the brake pads and brake discs are brand new and have not undergone a break-in period, leading to unusual sounds. If the noise disappears after some use, it is considered normal.2. Foreign objects between the brake pads and brake discs causing abnormal noise: While driving, sand or small particles may enter between the brake pads and brake discs, sometimes causing friction and noise. Simply remove the foreign objects from the brake system.3. Low temperature causing abnormal noise: A low-frequency noise when braking during a cold start. Due to low temperatures, the rubber components of the chassis suspension become stiff and may work together with the frame, causing vibrations in the brake calipers or suspension system, resulting in low-frequency noise. The noise should disappear after driving for a while and the vehicle warms up.4. Loose or aged suspension or chassis components causing abnormal braking noise: Missing or damaged brake disc fixing screws can also cause abnormal braking noise. Loose or aged components such as shock absorber fixing screws, stabilizer bar rubber bushings, or ball joints may lead to abnormal braking noise while driving. Regularly inspect and replace these parts.5. Brake disc corrosion causing abnormal braking noise: The brake discs and pads may corrode due to water exposure or prolonged parking, especially after prolonged use of the handbrake, causing the brake discs and pads to stick together and produce noise during initial driving. Inspect and replace the brake discs.6. Severely worn brake pads or discs causing abnormal braking noise: Brake pads usually have wear indicators. When the brake pads wear to their limit, the wear indicators will rub against the brake discs, producing abnormal noise. When brake discs wear, due to surface contamination, uneven material density, excessive working temperature, or mismatched installation torque, abnormal noise may occur. Inspect and replace the brake pads or discs.

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Should the A/C be turned on in the car during summer?

During summer, the A/C in the car must be turned on; otherwise, the air blown out will not be cold. Here are some additional tips: 1. To quickly lower the temperature inside the car during summer, you can adjust the position of the air vents. 2. According to the principle of air convection, hot air rises while cold air sinks. You should aim the air vents slightly upward to utilize this principle—as the cold air descends, it rapidly cools the interior of the car. Also, avoid placing decorations in front of the air vents, as this can affect the cooling efficiency. 3. Additionally, if the car has been parked outdoors under prolonged exposure to the sun, the correct approach is to first start the engine for preheating. Once the engine temperature gauge reaches the midpoint, turn on the A/C and set the air circulation to external mode to expel the hot air from the car. After 2~3 minutes, switch the air circulation to internal mode.

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What are the steps to clean the throttle body?

The steps to clean the throttle body are as follows: 1. Remove the engine cover and detach the intake pipe connected to the throttle body, where you will find a significant amount of oil sludge and carbon deposits. Note that the metal clamp should be tightened with screws. 2. Remove the throttle cable, then disconnect the three sets of wiring connected to the throttle position sensor, idle motor, and intake manifold absolute pressure sensor. 3. Use a hex wrench to remove these three electronic components, and you will notice oil sludge adhering to the telescopic rod head of the idle motor. 4. Use carburetor cleaner to clean the oil sludge inside the throttle body, especially around the throttle valve. Excessive sludge can fill the gaps around the throttle valve inside the throttle body. Then, spray the telescopic rod of the idle motor with carburetor cleaner and wipe off the sludge with a cloth until the metal shines. Also, clean the exposed oil sludge on the motor shaft. 5. After thorough cleaning, carefully reinstall the three electronic components. Use the remaining cleaner to rinse off any external oil stains and reinstall the throttle body as it was. Remember to reconnect the wiring for the three electronic components on the throttle body; otherwise, the computer will automatically trigger an alarm when the key is turned during the final inspection.

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Why does the fuel gauge rise slowly after refueling?

After refueling, the fuel gauge rises slowly due to a damaged float in the fuel tank. Here is more information about the car fuel gauge: How the car fuel gauge works: The fuel system mainly consists of four parts: the fuel gauge, sensor circuit, variable resistor, and float. When the fuel tank is full, the resistance value of the variable resistor connected to the float decreases, and the circuit current reaches its maximum. At this time, the fuel gauge needle is at its highest position. When fuel consumption decreases, the resistance value of the variable resistor increases accordingly, the circuit current decreases, and the fuel gauge needle also drops. Common fuel gauge malfunctions: There are two main fault phenomena: one is when the fuel gauge needle remains at the lowest position even after refueling; the other is when the fuel gauge needle remains at the highest position even after the fuel is exhausted. If either of these phenomena occurs, it indicates a fault in the circuit or the float, and the vehicle should be taken to a repair shop for timely maintenance.

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What is the problem when the car engine warning light is on and the car is shaking?

The engine warning light is on, and the car body is shaking due to poor combustion of the air-fuel mixture. Poor combustion of the air-fuel mixture can lead to engine carbon deposits, which is the most important cause of body shaking. At the same time, when the oxygen sensor detects poor combustion of the air-fuel mixture and reports it to the ECU, the warning light will illuminate as an alert. Therefore, the engine warning light and body shaking occur simultaneously. Faulty spark plugs, ignition coil failure, fuel pump failure, or clogged fuel lines can all cause poor combustion of the air-fuel mixture in the engine. If the engine warning light is on, you can follow these steps: After the engine warning light comes on, first check if the engine is running normally, whether there is shaking, black smoke, or difficulty starting. If any of these issues are present, try not to start the engine again. Especially note that if the red light is on, do not start the engine under any circumstances. If the engine is running normally and the car can be driven, please go to a service station as soon as possible to find out the cause. The service station can easily read the fault code by connecting a portable diagnostic tool, obtain fault information, and carry out targeted repairs. If the engine is running normally, the owner can also try gently plugging in all wiring harness connectors, as it may be caused by a loose connection somewhere, or repeatedly turning the key to the ON position to see if the issue can be resolved.

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How Serious Is Forgetting to Release the Handbrake While Reversing?

If the car is in motion, it might stall due to the handbrake's effect. If you apply some throttle and reverse normally, there won't be much impact. However, prolonged reversing can affect the brakes. Below are relevant details: 1. Meaning of the Handbrake: The parking brake, commonly known as the handbrake, provides resistance when the car is parked to prevent it from rolling. The parking brake, whether manual or the parking gear in automatic transmissions, locks the drive shaft or rear wheels. The force of the parking brake is much weaker than that of the service brake, just enough to prevent the car from rolling on slopes. 2. Types: There are different types of parking brakes, such as the mechanical ones operated by hand or foot mentioned above. Additionally, high-end vehicles are increasingly adopting electronically controlled parking systems, commonly known as electronic handbrakes.

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What is the working principle of a car central locking system?

How to Deal with Abnormal Noise When Starting and Braking a Car?

Should the A/C be turned on in the car during summer?

What are the steps to clean the throttle body?

Why does the fuel gauge rise slowly after refueling?

What is the problem when the car engine warning light is on and the car is shaking?

How Serious Is Forgetting to Release the Handbrake While Reversing?

What does 19555r15 mean for tires?

What is the DELINTE tire brand?

How to Start a Car with Push-Button Ignition?

Where is the new vehicle certificate number located?