Should Transmission Fluid Be Changed During the First Maintenance?

What does the P gear mean in a car?

P gear stands for the parking gear, which means the wheels are mechanically locked. P gear is used for parking on flat ground: The P gear is both a neutral gear and equipped with a braking mechanism, so its direct function is parking. When temporarily stopping on a level road, shifting to P gear puts the car's transmission in neutral operation, completely interrupting power transmission from the engine to the output shaft. The driver does not need to turn off the running engine during short waiting periods. P gear is used for parking on slopes: The core function of P gear is to achieve durable and safe slope parking for automatic transmission cars. When the vehicle is parked on flat ground, both automatic and manual transmission cars can be securely held in place for long periods using just the handbrake.

14

1

Share

What Causes the Front Wheels to Make a Rumbling Noise When Driving Slowly on Flat Roads?

The front wheels making a rumbling noise when driving on flat roads may be due to foreign objects stuck in the tire treads or a fault in the vehicle itself. Diagnosing Vehicle Faults: Check if any warning lights are illuminated on the dashboard. Hazards of Foreign Objects in Tire Treads: They can puncture the tire and cause a blowout. Small, hard, and sharp objects like stones stuck in the tires can easily puncture them, leading to air leakage and a rapid drop in tire pressure, which may result in a blowout. If this happens during high-speed driving, it could even cause the vehicle to lose control or overturn. Reduced tire drainage capability. The tread patterns on tires help quickly drain water when driving in rainy or snowy conditions. However, if the tires are filled with a large number of stones or other hard objects, their drainage efficiency will be significantly reduced. This can also affect the braking performance of the tires, increasing the likelihood of skidding. Especially when driving through waterlogged areas, the tires may even lose their grip.

2

Share

Where is the appropriate location to install the ETC device?

The ETC device is generally installed on the upper middle part of the front windshield for passenger vehicles, while for large vehicles such as trucks and buses, it is installed on the lower middle part. The suitable installation position should be no lower than 1.2 meters and no higher than 2.5 meters, with an installation angle between 30 to 90 degrees. For vehicles with pre-installed or aftermarket explosion-proof film, which may affect the signal transmission of the microwave communication link, the device should be installed on the microwave sunroof strip. ETC stands for Electronic Toll Collection. To apply for ETC, the vehicle owner must provide their valid ID card and the original and photocopy of the vehicle registration certificate. If the application is made by a proxy, the proxy's valid ID card is also required. The photocopy of the vehicle registration certificate should include the page with the most recent annual inspection stamp. Additionally, a bank card for deducting highway tolls is needed, and the vehicle must be registered under the name of an individual aged between 18 and 60. For company vehicles, the required documents include: An introduction letter from the vehicle owner (with company seal); photocopy of the organization code certificate or business license (with company seal); original ID card of the proxy; original vehicle registration certificate; and the vehicle for which ETC is to be applied. Here are some considerations for installing ETC: Do not obstruct the driver's view; it is best to install it behind the rearview mirror: Many car models have a steeply inclined windshield, which can reduce the driver's field of vision. If ETC is installed without considering this, it may increase the driver's blind spot. Installing it behind the rearview mirror on the right side can help avoid obstructing the view. Do not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement, as it has a built-in solar panel for self-charging. Therefore, during installation, avoid the blackened areas on the windshield and positions that may block the solar panel. Once installed, do not remove it arbitrarily: The button in the middle of the adhesive is an anti-removal lever connected to a switch. After installation, the windshield will press the anti-removal lever in. If the device is removed arbitrarily, the lever will pop out and trigger the switch, locking the electronic tag and rendering it unusable. In such cases, the user must visit an ETC service point to unlock it. This mechanism is designed to prevent multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To prevent the ETC device of the vehicle in front from malfunctioning, maintain a distance of more than 10 meters from the vehicle ahead to avoid automatic toll deduction for the preceding vehicle. The ETC lane recognizes vehicles at a speed of 20 kilometers per hour; driving too fast may result in failure to read the vehicle's device information, leading to toll deduction failure. When using a debit card linked to ETC, insufficient balance may also cause toll deduction failure.

12

2

Share

Will you be penalized for getting off the car during a traffic jam on the highway?

Getting off the car during a traffic jam on the highway will result in penalty points and a fine of 200. Precautions for highway traffic jams: When traffic congestion occurs on highways or bridge sections, drivers and passengers should adjust their emotions. Unless there are special circumstances, do not get off the car, and do not cross the central partition of the bridge or stand on the central guardrail support. Purpose of highways: Highways are designed for high-speed vehicles. Highways have different regulations in different countries and regions, at different times, and in different scientific and academic fields. Highways are fully enclosed roads dedicated to motor vehicles. First-class roads can be fully enclosed, semi-enclosed, or open roads. They are more widely used than highways, but their technical indicators are relatively lower.

18

4

Share

How to Deal with Difficult-to-Open Car Door Handles?

Here are the methods to handle difficult-to-open car door handles: Unlock Button: The central locking system of the door is in the unlocked state. When the door cannot be opened, you can first use the car key to unlock it, then lock it again, repeating this twice. Then locate the central locking button on the left front door trim panel of the driver's cabin, press the unlock button, and try again to see if the previously unopenable door can now be opened. Replace Hinges and Lock Post: If the door has been subjected to a certain amount of external force, it may cause deformation of the door hinges and lock post. In this case, you need to go to a repair shop for maintenance or replacement. Replace Door Limiter: If opening the door requires excessive effort or is completely impossible, the solution is to replace the door limiter with a new one.

7

4

Share

How Does a Sensor Work?

Sensor working principle involves converting specific measured signals into "usable signals" through sensitive and conversion elements according to certain rules, then outputting them to meet requirements for information transmission, processing, recording, display, and control. Sensors can be categorized by principle into: vibration sensors, humidity sensors, magnetic sensors, gas sensors, vacuum sensors, and biosensors. Sensors are the primary component for achieving automatic detection and control. Their function is to convert non-electrical quantities into electrical quantities or circuit on/off states, enabling convenient measurement, transmission, processing, and control.

11

4

Share

Should Transmission Fluid Be Changed During the First Maintenance?

What does the P gear mean in a car?

What Causes the Front Wheels to Make a Rumbling Noise When Driving Slowly on Flat Roads?

Where is the appropriate location to install the ETC device?

Will you be penalized for getting off the car during a traffic jam on the highway?

How to Deal with Difficult-to-Open Car Door Handles?

How Does a Sensor Work?

What Causes No Sound When Starting the Car and Failure to Ignite?

Why Do Tires Fall Off During a Car Collision?

What are the new regulations regarding electric motorcycles?

Is It Dangerous to Drive Without the Fuel Tank Cap?