What do R, N, D, S on a car mean?

What are the functions of each wire in a three-wire ignition coil?

Automobile ignition coils have three wires: power wire, ground wire (one primary wire, one secondary wire, both of which are live wires that ground through the spark plug), and control signal wire. The following are their functions: 1. Power wire: Provides voltage from the ignition switch and main relay; 2. Ground wire: Controlled by the engine ECU; 3. Control signal wire: It is the switch signal output from the ECU computer circuit board, controlling the ignition signal. During daily use, the following points should be noted to prevent damage to the ignition coil: 1. Prevent the ignition coil from overheating or getting damp; 2. Do not turn on the ignition switch when the engine is not running; 3. Regularly check, clean, and tighten wire connections to avoid short circuits or grounding; control engine performance to prevent excessive voltage; 4. Moisture on the ignition coil can only be wiped dry with a cloth, never baked with fire, as this will damage the ignition coil.

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How Far Should the Warning Triangle Be Placed?

Introduction to the placement of the warning triangle: On regular roads, in case of a breakdown or traffic accident, the warning triangle should be placed 50 to 100 meters behind the vehicle. On highways, the warning sign should be placed at least 150 meters behind the vehicle. In foggy or rainy weather, the distance should be increased to 200 meters. Below is some relevant information about the warning triangle: 1. Definition: The warning triangle, also known as the triangular warning sign, is a passive reflector made of plastic reflective material. 2. Function: When a driver encounters a sudden breakdown requiring parking for repairs or an accidental collision, the reflective properties of the warning triangle can alert other vehicles to take evasive action, thereby preventing secondary accidents.

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Is the fuel price at service areas the same as in urban areas?

Highway service area gas stations operated by the same company in the same region have fuel prices identical to those outside. Relevant knowledge about highway service areas: 1. Definition: Highway service areas, also known as highway service stations, are typically located every 30-60 kilometers along domestic highways. Their facilities include accommodation (including parking), dining, refueling, and vehicle repair services. 2. Additional services at service areas: Generally, a full tank for small passenger vehicles can cover 500-800 kilometers. In case of running out of fuel, emergency phones are available every 1-2 kilometers outside the highway barriers. Service areas offer services such as fuel delivery, towing, and repairs. If no phone is nearby, you can also dial the local area code +122 for assistance.

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What does the 12123 inspection validity period end mean?

12123 inspection validity period end means that motor vehicles can apply for annual inspection within 3 months before the annual inspection date. Here is relevant information: 1. Inspection time: Non-operational passenger cars implement a 6-year exemption policy, which means new vehicles within 6 years are exempt from on-site inspection, but note that every 2 years, an application for inspection marks must be submitted to the traffic management department, otherwise it will be considered as overdue inspection. SUVs and MPVs with 7 seats or more do not enjoy the 6-year exemption policy. Vehicles registered for more than 6 years are subject to an annual inspection policy; vehicles registered for more than 15 years are subject to a twice-a-year inspection policy. Operating passenger vehicles are inspected once a year within 5 years of registration, and every six months after 5 years. The inspection date is the month of vehicle registration, and inspection can be done 3 months in advance. For example, vehicles registered in May can be inspected in March, April, or May. 2. Annual inspection notes: Before the annual inspection, the owner needs to check whether there are any traffic violations on the vehicle. If there are, they need to be dealt with in time to avoid affecting the normal progress during the annual inspection. Choose good weather for the annual inspection, and try to avoid snowy or rainy days, as wet wheels cannot detect normal braking force. When conducting the annual inspection, it is necessary to bring the vehicle license, owner's ID card, insurance policy, compulsory insurance policy, etc. Having all materials ready can avoid trouble during the inspection. Check the trunk; the triangular warning sign must be carried. If not, purchase one in time to avoid affecting the normal inspection due to details.

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Where to Place the Jack When Changing a Tire?

The vehicle body bottom has dedicated support points for the jack, usually located on the inner side of the side skirts, approximately 200mm behind the front wheels and 200mm in front of the rear wheels. Below is relevant information:1. Tire Change Considerations: The new tire must match the specifications of the previous one and be identical to the other tire on the same axle, including speed rating, load index, tread pattern, brand, size, etc., to ensure safe driving. Tires with seemingly symmetrical treads actually have a specific direction; incorrect installation may lead to uneven wear. When installing the tire, ensure the side with numbers faces outward toward the wheel hub. However, different manufacturers may use varying labeling methods, such as some brands marking "OUTSIDE" on the tire sidewall. After installation, wheel balancing is essential. Inflate the tire to the maximum allowed pressure before reducing it to the manufacturer's recommended standard pressure.2. Tire Maintenance: To ensure tire mileage and performance, conduct monthly checks on tire pressure, wear uniformity, and any damage. Proper tire pressure enhances tire performance and fuel efficiency. Underinflation is a leading cause of tire failure, potentially causing severe cracking, component separation, or blowouts. It reduces load capacity, leads to excessive sidewall flexing, increases rolling resistance, and causes heat buildup or mechanical damage. Overinflation makes tires harder, resulting in an uncomfortable ride and unnecessary vibrations, while also increasing the risk of impact damage.

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What is the eco index?

eco index is the vehicle's energy-saving and fuel-efficient mode. When the vehicle activates eco mode, the onboard computer calculates based on the current driving speed and throttle conditions, then automatically adjusts the gear, and the throttle pedal response slows down accordingly to achieve fuel-saving effects. The following are the advantages and disadvantages of eco mode: 1. Advantages: The biggest advantage of activating ECO mode in a car is the ability to save fuel and reduce vehicle operating costs. 2. Disadvantages: The vehicle may experience some lack of power during driving, and prolonged use of ECO mode can increase engine carbon deposits.

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What do R, N, D, S on a car mean?

What are the functions of each wire in a three-wire ignition coil?

How Far Should the Warning Triangle Be Placed?

Is the fuel price at service areas the same as in urban areas?

What does the 12123 inspection validity period end mean?

Where to Place the Jack When Changing a Tire?

What is the eco index?

What to Do If a Mouse Gets Inside the Car Engine?

What Are the Effects of Exhaust Pipe Leakage in a Car Engine?

What are the possible causes of poor engine acceleration?

How to Step on the Clutch in Subject 2?