Is there an examiner in the co-pilot seat during Subject 2 test?

Why Can't Lexus Add Bluetooth Devices?

Lexus cannot add Bluetooth devices, most likely because a phone is already paired. Here are specific details about Lexus: 1. Japanese Brand Vehicle: The Lexus brand was established in 1983 and is a globally renowned luxury vehicle brand under the Japanese Toyota Group. 2. Long Maintenance Period: Lexus offers basic maintenance services for 4 years or 50,000 miles, with the powertrain maintenance period extending up to 6 years or 70,000 miles. 3. Numerous Models: The new Lexus ES has launched 8 models: ES-200 Excellence and Luxury editions; ES-260 Excellence and Premium editions; ES-60 F-SPORT edition; ES-300h Excellence, Premium, and Executive editions.

20

4

Share

How Long Does a Start-Stop Battery Generally Last?

Start-stop batteries can last up to 6 years. Additional information: The differences between start-stop batteries and regular batteries are as follows: 1. Different Lifespans: a. Start-stop batteries can last up to 6 years. Start-stop batteries designed for cars can endure more charge cycles and have a longer lifespan, typically 3-8 times that of regular batteries. The plates in start-stop batteries are harder than those in regular batteries, and the active material is less prone to shedding, making them suitable for vehicles with start-stop systems. b. Regular batteries generally have a lifespan of around 2 years. 2. Different Battery Capacities: a. Start-stop batteries have a larger capacity and can charge and discharge quickly. Conventional lead-acid batteries cannot handle multiple high-current discharges in a short period, as their separators do not allow ions to pass through quickly. b. Regular batteries cannot perform multiple high-current discharges in a short time, and their separators do not allow ions to pass through quickly. 3. Different Prices: a. Start-stop batteries are more expensive. Start-stop batteries are manufactured using stamping processes, which involve higher technical requirements, and the increased production costs drive up the overall price of the equipment. b. Regular batteries are cheaper.

5

Share

What Causes Excessive Vibration When the Car Air Conditioner is On?

Causes of excessive vibration when the car air conditioner is on are as follows: 1. Engine misfire: An engine misfire mainly refers to one or more cylinders not functioning properly. Common symptoms include intermittent exhaust gas flow, severe shaking of the exhaust pipe, noticeable engine vibration, and sometimes accompanied by a sputtering sound. This is often related to ignition coil failure. 2. Worn or loose engine mounts: Engine mounts are rubber blocks placed between the engine and the car frame. Their purpose is to reduce vibration and provide cushioning during engine operation, as well as to secure the engine. Once these mounts become worn or loose, the engine vibration will become significantly worse. Replacing the engine mounts can greatly reduce this issue. 3. Carbon buildup: Cars always face the issue of carbon buildup, which includes carbon deposits in the cylinders, throttle, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, the ignition energy, air intake efficiency, and air-fuel mixture ratio are affected, leading to unstable power output and vibration during idling and acceleration. It is recommended to have the engine cleaned at a 4S shop. 4. Fuel system malfunction: Using an incompatible fuel grade (e.g., using 90 octane instead of 93 octane) can reduce the car's power output and performance. Alternatively, blockages in the fuel tank vent, fuel tank switch, fuel filter, or the fuel line between the tank and the carburetor can restrict fuel supply, resulting in a lean air-fuel mixture and engine vibration. It is recommended to use the fuel grade specified by the manufacturer and perform regular maintenance.

3

4

Share

What Are the Methods for Extricating a Stuck Vehicle?

There are five methods for extricating a stuck vehicle: rocking method, digging method, random objects method, weight addition method, and tire pressure reduction method. Additional details are as follows: 1. Rocking Method: One of the core principles of vehicle extrication is power, where the vehicle attempts to repeatedly move forward and backward to gain sufficient traction. Accelerate slightly forward, then shift into reverse to move backward, and then switch back to forward gear to accelerate. For both automatic and manual transmissions, select second gear for forward movement. Keep the throttle input light—once you feel the wheels gaining power without spinning, it indicates a high chance of successful extrication. 2. Digging Method: When going on a road trip or off-roading, always carry a small shovel in the car. It has multiple uses, such as a wilderness tool, self-defense, and helping to extricate a stuck vehicle. Make sure to remove as much mud or sand as possible from around the tires. 3. Random Objects Method: Another core principle of extrication is gaining traction. Often, seemingly insignificant items in the car can be helpful. For example, placing car seat cushions or floor mats under the drive wheels can help the vehicle regain power and traction. Additionally, external objects like wooden planks, sticks, stone slabs, bricks, or even piles of leaves can provide significant assistance. 4. Weight Addition Method: Many people believe that reducing the vehicle's weight is the solution after getting stuck, but the opposite is true. Adding extra weight to the drive wheels increases downward force, compressing the suspension system and thereby enhancing traction. This method is particularly effective for rear-wheel-drive vehicles. 5. Tire Pressure Reduction Method: This method is usually recommended as a last resort. Reducing tire pressure increases the tire's surface area, thereby increasing its contact area with sand or mud. More contact may lead to greater traction, helping the vehicle get unstuck. It's important to note that an air pump should be used to reduce tire pressure rather than puncturing the valve core, as the latter could pose a danger or reduce tire pressure excessively.

7

4

Share

Does the third-generation EA888 engine still consume oil?

Third-generation EA888 engine oil consumption has been improved. Here is the relevant information: 1. Oil-gas separation: Volkswagen made significant adjustments to the engine structure based on previous consumer feedback regarding oil consumption issues. The adoption of a two-stage centrifugal oil-gas separator has significantly enhanced the separation efficiency of oil vapor, greatly reducing the oil consumption rate compared to the previous generation and noticeably improving the oil burning phenomenon. 2. Variable intake valve timing: While addressing the issue of excessive oil consumption, the third-generation EA888 engine also employs variable intake valve timing technology, effectively improving intake efficiency. Without increasing displacement, the engine's power parameters have been enhanced. For example, the 2.0T high-power version engine in the Audi Q5L achieves a maximum horsepower of 252 PS.

15

2

Share

Why is the Audi A3 reversing camera not displaying?

Audi A3 reversing camera not working smoothly, Audi A3 reversing camera black screen and other issues generally occur due to problems with the decoder, which can only be repaired at a 4S store. Related introductions are as follows: 1. Function: The car reversing camera system provides a more intuitive and clear view of the rear situation when reversing, making it one of the most practical configurations for reversing safety. 2. Principle: When the reverse gear is engaged, the system automatically activates the high-definition reversing camera located at the rear of the car, displaying a clear image of the rear situation on the reversing LCD screen, allowing for accurate grasp of the rear road conditions, making reversing as easy and confident as moving forward.

18

5

Share

Is there an examiner in the co-pilot seat during Subject 2 test?

Why Can't Lexus Add Bluetooth Devices?

How Long Does a Start-Stop Battery Generally Last?

What Causes Excessive Vibration When the Car Air Conditioner is On?

What Are the Methods for Extricating a Stuck Vehicle?

Does the third-generation EA888 engine still consume oil?

Why is the Audi A3 reversing camera not displaying?

Where is the best position to install ETC in a vehicle?

Why Does the Idle Speed of a Scooter Motorcycle Fluctuate?

When did the national expressways start to be toll-free?

Differences Between Three-Cylinder and Four-Cylinder Vehicles