Where is the OBD port located on a BMW 5 Series?

Is AC switch off turning it on or off?

The AC button in a car's air conditioning system controls the compressor. AC-OFF means the compressor is turned off, while AC-ON means it's turned on. Below are the reasons why a car's air conditioning compressor may not work: 1. Circuit system failure. Short circuits or open circuits in the wiring can disrupt the power supply path, preventing the electromagnetic clutch from properly controlling the compressor's operation. 2. Lack of refrigerant. Refrigerant and lubricating oil are mutually soluble and circulate back to the compressor through the system. If the Freon in the refrigerant is depleted, it can lead to insufficient oil return, reducing lubrication and causing the compressor to seize or fail. 3. Mechanical wear of the compressor. Prolonged high-speed operation under load can cause premature mechanical wear of compressor components, rendering it inoperable. 4. Over-tightened drive belt. An excessively tight drive belt can directly cause the compressor to seize and stop running, so it's important to regularly check the belt's tension. Conversely, a belt that's too loose can cause the compressor's power transmission to slip, resulting in intermittent cooling and reduced efficiency.

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Is the 10th-generation Accord CVT chain or steel belt?

The 10th-generation Accord CVT uses a steel belt. Currently, most cars with CVT structures adopt the steel belt transmission method. This transmission method can change the transmission ratio by altering the size of the pulley, allowing it to handle greater torque and offer better durability. CVT typically refers to a type of automotive transmission, also known as a continuously variable transmission, where the transmission ratio is not a series of discrete points but a continuous range of values, providing excellent fuel economy, power performance, and smooth driving experience. Taking the Accord 2018 230TURBO Comfort Edition as an example, its body dimensions are 4893mm in length, 1862mm in width, and 1449mm in height, with a wheelbase of 2830mm. It is equipped with a 1.5T turbocharged engine, paired with a continuously variable transmission. The front suspension is a MacPherson independent suspension, and the rear suspension is a multi-link independent suspension.

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Is it normal for brake discs to rust after a car has been parked for a long time?

It is normal for brake discs to develop a ring of rust when the car is parked in a place with high humidity for an extended period. Below is some relevant information about brake pads: 1. Classification of brake pads: Asbestos brake pads (mostly phased out), semi-metallic brake pads, low-metallic brake pads, NAO formula brake pads, ceramic brake pads, NAO ceramic brake pads. 2. Ceramic brake pads vs. traditional brake pads: In traditional brake pads, metal is the main material that generates friction, providing strong braking force but with high wear and a tendency to produce noise. After installing ceramic brake pads, abnormal squealing (clicking sounds) will not occur during normal driving. Since ceramic brake pads do not contain metal components, they avoid the metal screeching noise caused by friction between traditional metal brake pads and their counterparts (i.e., brake pads and brake discs). 3. Stable friction coefficient: Ordinary brake pads have immature friction materials, and a friction coefficient that is too high can lead to unsafe factors such as loss of control during braking, pad burning, and scratching of the brake discs. Even when the brake disc temperature reaches as high as 650 degrees, the friction coefficient of ceramic brake pads remains around 0.45-0.55, ensuring the vehicle maintains good braking performance.

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Is a car tire pressure of 272 kPa normal?

Not normal. According to the provisions and requirements of the international GBT2978-2008 standard, the standard tire pressure for standard tires is 2.4-2.5 bar. Tire pressure reset method: First, turn on the ignition switch, press and hold the tire pressure monitoring reset button until you hear a "beep" sound, then release it. The tire pressure monitoring system will store the current normal tire pressure data, automatically clear the previous data, and finally, the fault light on the dashboard will turn off, completing the tire pressure reset. There are generally three reasons for abnormal tire pressure: Abnormal tire pressure: Generally, an alarm will sound if the pressure is below 1.8 bar or above 3.0 bar. At this time, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset in time, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator light to turn on. At this time, simply perform a tire pressure reset. Damaged tire pressure sensor: The tire pressure sensor is used to monitor tire pressure and is directly installed inside the tire, connected to the tire inflation port. If the tire pressure sensor is damaged while driving, it will also cause the tire pressure fault light to turn on. For sensor damage issues, only a new replacement part can be installed.

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How long can a 60km range last?

A range of 60KM means the vehicle can still travel 60KM. If driving at a speed of 60KM per hour, the car can run for one more hour. The actual duration depends on real-time speed. In practical use, the displayed range is not accurate, and the actual distance traveled is usually less than shown. To improve range, follow these tips: 1. Maintain medium-low speed. 2. Drive at a constant speed. 3. Reduce vehicle load. 4. Avoid sudden acceleration or braking during the trip. Note: The maximum battery-supported range refers to the highest distance the vehicle can travel in pure electric mode relying solely on battery power.

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How Does an Automotive Ignition System Work?

When a gasoline engine operates, the combustion of the air-fuel mixture is controlled by the spark plug ignition. The working principle of the ignition system is to supply the spark plug with high-voltage electricity of sufficient energy at the appropriate moment, according to the engine's operating state and sequence, causing a spark between its electrodes to ensure the ignition of the air-fuel mixture and enable the engine to perform work. The ignition process of the ignition system can be divided into the following three stages: Stage 1: Contact closure, formation and growth of the primary current. When the contacts are closed, a low current flows through the circuit, following this path: positive terminal of the battery - ignition switch - primary winding of the ignition coil - breaker contacts - negative terminal of the battery. Stage 2: Contact opening, generation of the secondary high-voltage stage. At the instant the breaker contacts open, the distributor rotor aligns precisely with one of the side electrodes. The current path at this stage is: secondary winding of the ignition coil - positive terminal of the battery - side electrode of the spark plug - center electrode of the spark plug - high-voltage wire - side electrode of the distributor - center electrode of the distributor - secondary winding of the ignition coil. Stage 3: Spark plug discharge stage. After the spark plug is energized, a discharge spark occurs between its center electrode and side electrode, igniting the atomized gasoline under compression in the cylinder, thereby activating the engine.

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Where is the OBD port located on a BMW 5 Series?

Is AC switch off turning it on or off?

Is the 10th-generation Accord CVT chain or steel belt?

Is it normal for brake discs to rust after a car has been parked for a long time?

Is a car tire pressure of 272 kPa normal?

How long can a 60km range last?

How Does an Automotive Ignition System Work?

How to Check the Date on a Car Battery?

What are the hazards of a car cylinder not working?

What is the CBD warning light in a car?

What is the reason for one side of the car air conditioner having airflow while the other side does not?