Which one is on, 'on' or 'off'?

What are the common fault symptoms caused by ice blockage in the refrigeration system?

1. Once "ice blockage" occurs, the refrigerant circulation volume of the entire system and the refrigerant flow entering the evaporator decrease. The rear part of the evaporator overheats and melts the frost layer, causing the compressor suction pressure to drop, which ultimately leads to compressor failure. 2. After "ice blockage" occurs, the cooling capacity of the compressor decreases. If the compressor operates for an extended period with insufficient refrigerant and excessively low evaporation pressure, the compressor's suction temperature rises, causing the cylinder head to overheat and reducing the compressor's service life. 3. After "ice blockage" occurs, the blockage pressure in the refrigerant circulation system increases. The mixture of moisture and coolant leads to increased corrosiveness, which causes impurities from corrosion to mix into the refrigerant and lubricating oil, rapidly deteriorating the oil. This can block pressure gauges and relay pressure transmission tubes, obstruct the oil pressure valve unloading mechanism pipelines, damage the oil distributor, and even cause gear breakage in the gear oil pump, among other severe consequences. 4. If "ice blockage" is severe or not promptly resolved, the storage temperature may fail to meet the required refrigeration or freezing standards.

20

3

Share

What type of engine oil is suitable for the Changan CX70T?

The Changan CX70T originally uses SL-grade 5W-30 engine oil. Any oil that meets this specification can be used, and there is not much difference between brands. Engine oil is a crucial factor affecting engine performance and lifespan. The vehicle comes pre-filled with high-quality multi-grade viscosity oil, which can be used year-round except in extremely cold climates. The principle for purchasing engine oil is "there is no best, only the most suitable oil." It is recommended to first use the specifications recommended by the vehicle manufacturer. When selecting oil, always choose the corresponding specifications. If price is a concern and you drive frequently with frequent oil changes, mineral oil or semi-synthetic oil is acceptable. However, if you drive very little and change oil only once a year, it is advisable to use a higher-quality fully synthetic oil. Regarding viscosity grades, some European and Japanese manufacturers, for environmental and fuel-saving reasons, may recommend low-viscosity oils like 5W-20. Simply follow the manufacturer's recommendations. Of course, if the manufacturer does not specify, you can choose oil based on your driving environment. Generally, commonly available oils like 0W-40, 5W-30, and 5W-40 have strong applicability, suitable for most climates in China and most vehicle usage scenarios.

1

Share

What is the PWR button in a car?

PWR is the abbreviation for POWER, which stands for the power mode button. When this button is pressed, the indicator light will illuminate. Typically, vehicles that use the PWR button to denote power mode are Japanese cars. Compared to normal mode, in power mode, the transmission will delay upshifting to provide stronger acceleration. PWR usually indicates power mode. When the mode selection switch is pressed, the power mode is selected, and the indicator light will display. In this mode, the vehicle will have more power upon startup compared to NORM mode. Pressing the PWR or NORM mode selection switch again will turn off the indicator light. In power mode, you can clearly feel the car becoming more powerful. This is mainly because, in PWR mode, the transmission's shifting becomes more aggressive. In normal mode, shifting might start at 2000 RPM, whereas in PWR mode, it might start at 3000 RPM. The delayed shifting keeps the engine at higher RPMs, providing better power responsiveness. Additionally, the vehicle downshifts more aggressively to maintain the engine's high RPM state. Some gear levers do not have an "S" (Sport) mode because the PWR button serves the same function. PWR mode prioritizes power responsiveness, and keeping the engine at high RPMs maintains certain exhaust pressure to better drive the turbocharger, resulting in improved performance. However, PWR mode also leads to higher fuel consumption. The electronic throttle control system proportionally adjusts the accelerator pedal opening in all driving conditions, ensuring the engine output power remains appropriate. The electronic throttle control system has three modes: Normal, Power, and Snow. Normal Mode: During regular driving, the accelerator pedal opening is proportional, and the engine output power remains appropriate. Using Normal mode is recommended for fuel efficiency. Power Mode: Used for enhanced acceleration and sporty driving, suitable for highway driving. Driving characteristics include faster acceleration, higher fuel consumption, delayed transmission shifting, intelligent four-wheel drive mode for 4WD models, and heavier steering. Snow Mode: Used for slippery surfaces, such as icy or snowy roads. In this mode, the rear wheels' spinning is appropriately controlled.

13

0

Share

What is the fuel tank capacity of the Cadillac XT6 in liters?

The fuel tank capacity of the Cadillac XT6 varies depending on the model version, with two-wheel drive models having a 73L tank and four-wheel drive models featuring an 82L tank. The vehicle's engine utilizes turbocharging for air intake, is equipped with an automatic transmission, and employs a front-engine, four-wheel-drive layout. Among vehicles in the same class, the Mercedes-Benz has a fuel tank capacity of 66L, the Wrangler has an 81.4L tank, and the Audi features a 73L tank. During actual refueling, the amount of fuel may exceed the nominal capacity. This is because the manufacturer's specified tank capacity is measured from the bottom of the tank to the safety limit, with additional space remaining between the safety limit and the tank opening. This extra space is designed to accommodate fuel expansion due to temperature increases without causing overflow. If fuel is filled up to the tank opening during refueling, the actual fuel quantity may exceed the nominal tank capacity. To check the remaining fuel level, drivers can observe the fuel gauge on the right side of the instrument panel, which is marked with E (Empty) and F (Full). When the needle approaches E, it indicates low fuel, while proximity to F signifies sufficient fuel levels.

14

1

Share

Can Electric Vehicles Be Charged Outdoors in the Rain?

Electric vehicles can be charged outdoors during rain because all the charging ports are well-designed with waterproof features, making it safe to charge outside even in wet conditions. However, appropriate protective measures should still be taken to prevent any risk of electric leakage. When charging in heavy rain, it is advisable to use an umbrella to cover the charging port after plugging it in to ensure waterproofing. Notes on electric vehicle batteries: 1. When cleaning an electric vehicle, avoid getting water into the power battery pack. Although the vehicle has good waterproofing and sealing, it is best not to use a high-pressure water jet directly on the power battery during cleaning. Otherwise, water ingress due to imperfect sealing of certain components may cause short circuits, leading to potentially serious consequences. 2. Pay attention to the operating temperature of the electric vehicle. The optimal working temperature for electric vehicles is between 10°C and 30°C, ensuring good ventilation and heat dissipation. If the ambient temperature is too low, the power battery may not charge fully, reducing its capacity and potentially shortening its lifespan during discharge. Conversely, excessively high temperatures may lead to overheating and loss of control of the power battery. 3. Always avoid battery collisions. Typically, the power battery pack is installed at the bottom of the vehicle's chassis. When driving over uneven roads, be mindful of scratches on the undercarriage, as they may damage the power battery pack. Additionally, after a collision, promptly inspect the power battery pack for any damage.

15

3

Share

How to Check if the Odometer Has Been Tampered With?

Checking the odometer is quite simple. Just review the maintenance records or use a diagnostic computer to read the transmission mileage. Some experienced appraisers can directly tell if a car's odometer has been tampered with just by looking. If you want to visually assess whether the odometer has been altered, you can check the wear and tear on the interior. While driving, components that the driver frequently interacts with include the main driver's door handle, the main driver's seat, pedals, steering wheel, and gear shift lever. By examining the wear on these parts, you can roughly determine if the vehicle's odometer has been tampered with. If a car shows very low mileage but has significant wear on the seats, steering wheel, gear shift lever, and pedals, it's highly likely that the odometer has been adjusted. Of course, visual judgment alone isn't entirely accurate. It's also necessary to rely on data to determine if the odometer has been tampered with. The most reliable method is to use a diagnostic computer to check the maintenance records or read the transmission mileage. Note that for manual transmission cars, you cannot read the transmission mileage because manual transmissions don't have a computer—only automatic transmissions do. Additionally, some automatic transmission computers don't record transmission mileage, so drivers need to be cautious when inspecting the car.

2

4

Share

Which one is on, 'on' or 'off'?

What are the common fault symptoms caused by ice blockage in the refrigeration system?

What type of engine oil is suitable for the Changan CX70T?

What is the PWR button in a car?

What is the fuel tank capacity of the Cadillac XT6 in liters?

Can Electric Vehicles Be Charged Outdoors in the Rain?

How to Check if the Odometer Has Been Tampered With?

What's the reason when the key can't be turned?

Why don't the hazard lights flash when locking a 2006 Passat Lingyu?

What to Do When the Driving School Keeps Your ID Card for Registration?

Where is the windshield washer fluid located in the Passat?