What is the newly added Subject 5 for driver's license?

What does 0ff mean on a car?

There are three off buttons in a car. The following is a detailed explanation of the three off buttons: 1. The off button is for the multimedia entertainment system, which can turn off functions such as music and navigation. 2. The off button is for the lighting adjustment system, which can directly turn off the car headlights. 3. The off button is for the vehicle stability system. The vehicle stability system is an active safety system that ensures driving stability. After turning off the vehicle stability system with the off button, the car loses its stability protection function and is prone to skidding or rolling over during high-speed turns.

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Where Are the Car Engine Sensors Located?

The specific locations of car engine sensors are as follows: 1. The oxygen sensor is installed on the exhaust pipe to monitor the gases after combustion, thereby determining whether the engine is burning fuel efficiently. 2. The wheel speed sensor is located on the front wheel brake disc, primarily used to detect signs of wheel slip based on the vehicle's speed. 3. The coolant temperature sensor is installed next to the thermostat, converting the coolant temperature into an electrical signal to increase fuel injection or advance the ignition timing when the temperature is low. 4. The intake pressure sensor is installed near the throttle body, sensing a series of resistance and pressure changes as the engine operates under different speed loads. 5. The camshaft sensor is installed at the front or rear ends of the crankshaft or near the crankshaft counterweight, measuring engine speed and confirming the crankshaft position signal. 6. The throttle position sensor is mounted on the throttle body, providing the ECU with data to control fuel injection and ignition timing.

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What does MacPherson independent suspension mean?

MacPherson independent suspension is one of many suspension systems. Here is an introduction to MacPherson independent suspension: 1. MacPherson suspension is mostly used for front wheels. It is a type of independent suspension and has a very simple structure. It is compactly arranged, saves space, and causes minimal changes in front-wheel alignment, providing excellent driving stability. Therefore, most passenger cars use this structure for their front suspension, with differences mainly in material selection and the tuning of shock absorbers and springs. 2. MacPherson suspension is one of the most widely used front suspensions for passenger cars in the world today. The MacPherson suspension consists of a coil spring, shock absorber, and lower control arm, with most models also including a stabilizer bar. 3. The MacPherson suspension has a simple structure, making it lightweight and responsive. Additionally, under the geometric configuration of a lower control arm and strut, it can automatically adjust the wheel camber, allowing it to adapt to the road during turns and maximize the tire's contact area. 4. Although the MacPherson suspension is not a highly technical suspension structure, its performance in driving comfort is quite satisfactory. However, due to its straight-tube construction, it lacks resistance to lateral impacts, has poor anti-dive performance during braking, weak suspension stiffness, and poor stability, resulting in noticeable body roll during turns.

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What Causes Fogging in Car Headlights?

The reason for fogging in car headlights is that moisture in the air enters the headlight through the vent pipe and adheres to the lens. As the moisture accumulates, fogging naturally occurs. This phenomenon is mostly caused by significant temperature differences. Here are the solutions for fogging in car headlights: 1. Generally, fogging inside the headlight can be resolved by turning on the headlights to dry it out naturally. In most cases, leaving the lights on for half an hour will dry the moisture. 2. Alternatively, compressed air can be used to blow-dry the headlight. However, it is recommended to prioritize the method of turning on the headlights to dry them, as using compressed air can often lead to dust entering the headlight assembly. 3. If there is noticeable moisture inside the lens that does not dissipate after turning on the headlights, it may be due to a seal failure or damage to the headlight. It is advisable to check the installation of the bulb and the headlight cover. If necessary, disassemble the headlight to inspect the seals and any damage from the outside in.

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What are the causes of torsional vibration and shaking in the driveshaft?

The causes of torsional vibration and shaking in the driveshaft include: bending deformation and eccentricity of the driveshaft; loss of balance in the driveshaft; detachment of balance plates on the driveshaft; wear of the universal joint (cross pin and needle bearings); loose connection bolts of the rear axle flange on the driveshaft, etc. Here are the detailed explanations: 1. When starting the car, if the body shakes accompanied by a "clunking" impact sound; and during driving, a periodic noise can be heard from the chassis, which becomes louder as the speed increases; in severe cases, the cab vibrates, and holding the steering wheel causes numbness in the hands, all of which are symptoms of driveshaft torsional vibration failure. 2. When the technical condition of the driveshaft is good, the amplitude of bending vibration is small, and the shaking and noise are not obvious. When its technical condition deteriorates, the amplitude of bending and torsional vibration increases, the vibration becomes intense, and may even cause body shaking, accompanied by noticeable periodic noise that intensifies with increasing speed. 3. Vibration during acceleration at speeds of 30~50 km/h is caused by an inappropriate angle between the driveshaft and the pinion gear axis in the rear axle. This can be mitigated by reinforcing the rear suspension with some form of overload auxiliary leaf spring to ensure the pinion gear and driveshaft operate at the correct angle. 4. Vibration during deceleration at speeds of 30~50 km/h is usually the opposite of the above, caused by an excessive angle between the pinion gear and the driveshaft axis. This vibration is more intense and is often due to sagging suspension components and front springs. If the vibration becomes more severe with increasing speed, it is due to unbalanced or poorly assembled transmission components, requiring a balance performance check.

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What does 'hold' mean on a car key?

There are two meanings for the 'hold' button on a car key: 1. The 'hold' button on a car key usually means long-press. Some keys have a trunk symbol printed on it, indicating that holding it down will open the trunk. This simplifies the process of opening the trunk after unlocking the car. 2. The 'hold' button on a car key also has another function: a remote engine start button. Within a certain distance, holding it for 2-3 seconds will automatically start the car. This feature is useful in winter and summer to adjust the interior temperature in advance. When using remote engine start, there's no need to worry about car theft, as the central locking system remains engaged. The remote control range is typically no less than 50 meters, allowing you to start the car remotely from home or work.

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What is the newly added Subject 5 for driver's license?

What does 0ff mean on a car?

Where Are the Car Engine Sensors Located?

What does MacPherson independent suspension mean?

What Causes Fogging in Car Headlights?

What are the causes of torsional vibration and shaking in the driveshaft?

What does 'hold' mean on a car key?

Does the Transmission Have a Filter?

What does 'services' mean on a car?

What does the eobd fault warning light mean?

What Items Are Included in Car Maintenance?