What does it mean when the driver's lock is activated?

Why does the engine shake when stationary in D gear?

Reasons for car shaking when stationary in D gear: When the car is in D gear with the brake pedal pressed, the transmission fluid inside the torque converter flows at high speed and is subjected to significant shear force. If this condition persists for too long, the temperature of the transmission fluid will rise. The engine will inject more fuel due to increased load, leading to higher fuel consumption and an increase in engine temperature. Therefore, keeping the car in D gear with the brake pressed for extended periods is particularly detrimental to both the engine and transmission. Generally, the reasons for an automatic transmission car shaking in D gear are as follows: 1. Engine or transmission mounts, commonly known as engine mounts, may be affected due to aging or improper installation. Further inspection is needed to determine if replacement is required. 2. Gear engagement shock in the transmission, caused by impurities or contamination in the transmission fluid, leading to poor performance of the transmission hydraulic system. Further inspection of the transmission fluid and components is necessary. 3. Severe contamination of the engine throttle body, causing changes in engine load, which in turn affects the normal operation of the transmission. 4. Improper engine air-fuel mixture, such as poor engine performance, issues with spark plugs, fuel injectors, etc. Further inspection is needed to confirm the cause of the fault.

17

2

Share

What Causes the Decrease in Coolant?

It is normal for coolant to have some minor consumption, as although the entire cooling system is sealed, the coolant reservoir cap has a pressure relief hole. Methods to determine if coolant is insufficient: Observe the coolant warning light on the dashboard. If it lights up, it is likely due to a lack of coolant, though it could also be caused by excessively high cylinder temperatures. Check the coolant reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving and promptly add coolant. Inspect the water level markings on the coolant reservoir. The normal coolant level should be between the maximum and minimum marks. To determine if coolant is lacking, check the markings—if the coolant is below the minimum level, it indicates a deficiency. Precautions for replacing coolant: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leaks or cracks in the pipes, with particular attention to the five-way hose. The five-way hose is named for its five connections to various parts, and coolant flows through it before being distributed to different sections of the car to perform its function. If there are signs of coolant leakage in this area, replace the hose or resecure the connections as needed.

12

1

Share

Where Does the Airbag Deploy From?

Airbags typically deploy from the center of the steering wheel. The steering wheel may appear smooth and seamless, but the plastic in the "tear seam area" is very thin—usually only 0.5 millimeters thick. This area serves as the "weak zone" of the cover. In the event of an accident, when the airbag is triggered, it will deploy from this "weak zone." The working principle of airbags is as follows: 1. When a collision occurs while the vehicle is in motion, the airbag sensor first receives the impact signal. If the impact reaches the specified intensity, the sensor activates and sends a signal to the electronic control unit (ECU). 2. Upon receiving the signal, the ECU compares it with its stored data. If the conditions for airbag deployment are met, the drive circuit sends an activation signal to the gas generator in the airbag module. 3. The gas generator ignites the propellant upon receiving the signal, producing a large volume of gas. This gas is filtered and cooled before entering the airbag, causing it to rapidly inflate and break through the padding in a fraction of a second. The airbag forms an elastic cushion in front of the driver or passenger, then promptly deflates and contracts to absorb the impact energy. This effectively protects the head and chest, preventing or reducing the severity of injuries.

7

5

Share

What is Fuel System Cleaner?

Fuel System Cleaner, commonly known as the third-generation gasoline detergent (also referred to as gasoline detergent or fuel additive), is designed to address carbon deposit issues in the fuel system of fuel-injected vehicles, quickly restore the engine's optimal working condition, and compensate for certain deficiencies in gasoline properties while imparting new beneficial characteristics (such as improving atomization, reducing wear, protecting the engine, and lowering emissions). Additional Information: 1. Fuel System Cleaner is a relatively new product that has emerged in recent years, commonly known as fuel additive (or gasoline additive). According to the instructions on these products' packaging, they are intended to compensate for certain deficiencies in gasoline properties, offering functions such as cleaning system carbon deposits, boosting octane ratings, improving atomization, reducing wear, and protecting the engine. When introduced into a vehicle's fuel intake system, it automatically cleans the system, removing deposits and maintaining the fuel injectors in optimal spray condition, thereby improving fuel combustion efficiency and saving fuel consumption. 2. As early as the "Standard for Controlling Harmful Substances in Motor Vehicle Gasoline" issued by the National Environmental Protection Agency, it has been clearly stated: "Gasoline should be added with fuel detergent that meets the specified requirements." This means that the gasoline supplied by gas stations already contains fuel detergent, and in principle, car owners do not need to purchase and add it separately. Moreover, the current market for "Fuel System Cleaner" is mixed with products of varying quality, and excessive use may potentially harm the vehicle. Therefore, it is recommended that car owners exercise caution.

2

Share

Why does the car fail to start due to brake failure?

The reasons for failing to start due to brake failure are as follows: 1. Brake shoe failure, abnormal or irregular wear; brake pads need to be replaced; 2. Oil leakage (brake fluid), insufficient brake fluid; simply replace the brake fluid; 3. ABS system failure, abnormal wheel speed sensor or wiring; check if the battery is low on power and charge it in time; 4. Spark plug failure, leading to an increased ignition gap, causing failure to start. Simply replace the spark plug. Additional information: 1. ABS system failure, abnormal wheel speed sensor or wiring, brake cylinder failure, such as fluid leakage or poor return. This situation indicates a parking brake system failure. It is recommended to contact professional maintenance personnel at a 4S shop to use a computer to check the specific fault content and then carry out targeted repairs. 2. If the vehicle's brakes fail, the vehicle is not allowed to drive. After the vehicle's brakes fail, the vehicle's braking system will be ineffective, and driving a vehicle without a braking system on the road is very dangerous. After the vehicle's braking system fails, the vehicle must be sent for repair immediately, and a tow truck can be used.

14

4

Share

What does M+ and M- mean in an automatic transmission?

M+ and M- are features found in vehicles with a manual-automatic transmission. The manual mode (M) of a manual-automatic transmission includes M+ and M-, allowing for both automatic and manual shifting. To use the manual mode, move the gear lever to the position between M+ and M-. Pushing the lever toward M+ shifts up one gear, while pushing it toward M- shifts down one gear. Additional information: 1. A manual-automatic transmission car refers to a vehicle equipped with a "manual-automatic" transmission, which combines both manual and automatic shifting modes. These transmissions have prominent +/- indicators, allowing the driver to manually switch gears by moving the lever to this position. 2. Structurally, a manual-automatic transmission is still an automatic transmission. Therefore, it retains some drawbacks of conventional automatic transmissions, such as relatively higher fuel consumption and limited modification potential. Additionally, since these transmissions are often imported, their cost is significantly higher than standard transmissions, leading to higher overall vehicle prices.

18

2

Share

What does it mean when the driver's lock is activated?

Why does the engine shake when stationary in D gear?

What Causes the Decrease in Coolant?

Where Does the Airbag Deploy From?

What is Fuel System Cleaner?

Why does the car fail to start due to brake failure?

What does M+ and M- mean in an automatic transmission?

Can electric mirrors not be folded manually?

What is the difference between W12 and V12?

Is the car windshield film applied on the inside or outside?

How Many Kilometers Should the Transmission Oil of a Small Car Be Changed?