What does it mean when ABS appears on the car display screen?

How soon can I take the Subject 4 test after passing Subject 3 in Anhui?

After passing Subject 3, there are three scenarios for the Subject 4 test schedule: 1. Taking the test directly on the same afternoon; 2. No appointment required within 9 days - you can take the Subject 4 test at the designated location with your ID within 9 days after passing Subject 3; 3. Making an appointment after 10 days - whether the appointment is successful depends on factors such as the current number of test-takers, the priority of the student, and temporary arrangements at the test center. The specific scenario depends on the driving school's arrangements. Subject 4, also known as the Subject 4 theory test or driver's theory test, is part of the motor vehicle driver's license assessment. The main content includes: safe and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident handling knowledge. The Subject 4 test consists of 50 questions, primarily in the form of case studies, pictures, and animations, with a full score of 100 and a passing score of 90.

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Can Old and New Coolants Be Mixed?

Old and new coolants cannot be mixed. Here are the relevant explanations: 1. Reason: Different coolants contain varying chemical components such as rust inhibitors, anti-corrosion agents, anti-foaming agents, and colorants. Mixing them can easily lead to chemical reactions, causing hazards like sedimentation and scaling. Therefore, the same brand of coolant should be used for replenishment. 2. Precautions: Be cautious when selecting and adding coolant. Choose a coolant with the appropriate ratio based on specific conditions. Then, add the selected coolant to the radiator until the liquid level reaches the specified position.

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How many years later does a sedan require biannual inspections?

Vehicles over 15 years old require inspections twice a year. Below are the relevant details: 1. Passenger transport vehicles: Annual inspection within 5 years; every 6 months after exceeding 5 years. 2. Trucks: Large and medium-sized non-passenger transport vehicles require annual inspection within 10 years; every 6 months after exceeding 10 years. 3. Small and mini non-commercial vehicles: Passenger vehicles require inspection every 2 years within 6 years; annual inspection after exceeding 6 years; every 6 months after exceeding 15 years. 4. Scrap age: Vehicles exceeding the scrap age cannot be transferred (sold), but can still be used; for sales, the vehicle's scrap certificate can be obtained from the DMV (to deregister the vehicle's records) before proceeding with the sale.

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Is It Normal for a New Car's Hood to Lack Protective Film?

It is normal for a new car's hood to lack protective film. Below are relevant explanations: 1. Reason: The protective film on a new car's hood is typically removed by the dealership, as vehicles are washed before delivery. 2. Precautions: Verify the displacement, manufacturing date, VIN (Vehicle Identification Number), and engine number. Then inspect the exterior for any flaws in the paint, tires, headlights, taillights, etc. Enter the driver's cabin to check if the seats are intact and defect-free, and ensure the floor is clean with proper sealing. Test door handles for smooth, secure, and reliable operation when opening/closing, and examine window/door seals for damage.

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What Causes High Idle Speed in Small Cars?

High idle speed in small cars can be attributed to the following reasons: 1. Idle switch not closing: When the idle contact is disconnected, the ECU determines that the engine is under partial load. At this time, the ECU calculates the fuel injection amount and timing based on signals from the air flow sensor, crankshaft position, and engine speed. However, since the engine is actually operating under idle conditions with less air intake, this results in an overly rich air-fuel mixture and increased engine speed. 2. Overly rich air-fuel mixture: When the ECU receives a signal from the oxygen sensor indicating an overly rich mixture, it reduces the fuel injection amount and increases the opening of the idle control valve, which then leads to an overly lean mixture and decreased engine speed. Conversely, when the ECU receives a signal indicating an overly lean mixture, it increases the fuel injection amount and decreases the opening of the idle control valve, resulting again in an overly rich mixture and increased engine speed.

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Why does a motorcycle jerk during acceleration?

Motorcycle jerking during acceleration may be caused by issues such as lugging, fuel supply, carburetor, electrical circuit, or air filter problems. Additional details are as follows: 1. Lugging: For motorcycles with gears, if the gear and throttle are not properly coordinated, selecting too high a gear can result in insufficient power output, causing jerking, commonly known as lugging. In this case, simply downshifting will resolve the issue. 2. Fuel supply problem: A slightly clogged fuel tank cap or gasoline filter can cause uneven fuel supply at high throttle. 3. Carburetor issue: A slightly clogged carburetor can also lead to uneven fuel supply, and cleaning the carburetor usually solves the problem. 4. Electrical circuit problem: Check the spark plug for excessive carbon deposits. If there is a lot of carbon buildup, it may be due to an overly rich mixture from the carburetor, causing incomplete combustion. Adjust the carburetor's mixture ratio and scrape off the carbon deposits. 5. Clogged air filter: This can result in insufficient air supply, leading to an overly rich mixture, incomplete combustion, and reduced engine power. If clogged, it is recommended to replace the air filter or clean the filter element thoroughly.

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What does it mean when ABS appears on the car display screen?

How soon can I take the Subject 4 test after passing Subject 3 in Anhui?

Can Old and New Coolants Be Mixed?

How many years later does a sedan require biannual inspections?

Is It Normal for a New Car's Hood to Lack Protective Film?

What Causes High Idle Speed in Small Cars?

Why does a motorcycle jerk during acceleration?

What Causes White Smoke from Cars in Summer?

What brand is the Binyue transmission?

Which button is the rearview mirror heater in rainy weather?

Can engine oils from different brands be mixed?