What does AST mean on a car?

Why Can't the Car Door Open After Unlocking?

After unlocking, the car door may not open mainly due to faults in the outer door handle cable or the door lock mechanism. Remote keys operate in three ways based on their usage: active mode, passive mode, and coil induction mode. Relevant information about car doors is as follows: 1. Introduction: A car door provides access for the driver and passengers, isolates external disturbances, reduces side impacts to some extent, and protects occupants. The aesthetics of a car are also related to the design of its doors. 2. Criteria for Good Car Doors: The quality of a car door is mainly reflected in its anti-collision performance, sealing performance, ease of opening and closing, and other functional indicators. Anti-collision performance is particularly important because, in the event of a side collision, the buffer distance is very short, making it easy for occupants to be injured.

103

Share

Where are the BMW X4 audio speakers located?

The BMW X4 audio speakers are located beneath the driver's and front passenger's compartments, as well as under the rear seats. Function of the speakers: Speakers are the audio signal devices in a car. During driving, the driver can emit necessary audio signals as required or regulated to warn pedestrians and alert other vehicles, ensuring traffic safety. They are also used for urging movement and transmitting signals. How speakers work: Car electric speakers produce sound through the vibration of a metal diaphragm. When the speaker switch is pressed, current flows through the contacts and the coil, generating a magnetic force that pulls down the armature, forcing the diaphragm to move. The movement of the armature disconnects the contacts, interrupting the current and causing the coil's magnetic force to disappear. The diaphragm, along with the armature, returns to its original position due to its own elasticity and the spring plate, closing the contacts again and restoring the circuit. Current then flows through the contacts to the coil, generating magnetic force and repeating the above process. This cycle continues, causing the diaphragm to vibrate repeatedly and produce sound.

117

Share

What does BMW's Automatic Parking Assistant Plus mean?

Automatic parking refers to the car parking itself without manual control. The system can automatically park the vehicle into a space, making it a valuable tool for drivers during reverse parking. When an ideal parking spot is found, simply press a button, sit back, and relax—everything else is handled automatically. Automatic parking technology is also applicable to active collision avoidance systems and ultimately contributes to achieving autonomous driving. Principles of Automatic Parking: Different automatic parking systems use various methods to detect objects around the car. Some are equipped with sensors around the front and rear bumpers, which can act as both transmitters and receivers. These sensors send signals that reflect off obstacles near the vehicle. The car's computer then calculates the time taken for the signals to return to determine the obstacle's position. Factors Affecting Automatic Parking: Other systems use cameras or radar installed on the bumpers to detect obstacles. However, the end result is the same: the car detects parked vehicles, the size of the parking space, and the distance to the curb, then maneuvers into the spot. Environmental conditions, such as leaves, debris, or snow covering the curb, can affect the parking space measurement and the parking process, making it difficult for the parking steering assist system to recognize the curb.

113

Share

Does a 2017 vehicle require an annual inspection in 2021?

A 2017 vehicle requires the annual inspection procedure in 2021, which is an off-line inspection procedure. It can be processed through the Traffic Management 12123 platform or directly at the vehicle management office or the traffic management department of the public security authority. Both methods effectively handle the vehicle's exemption from physical inspection. Relevant details are as follows: Purpose of vehicle annual inspection: The annual vehicle inspection is a mandatory test for every vehicle that has obtained an official license plate and registration certificate. It is equivalent to an annual physical examination of the vehicle according to the technical conditions for safe operation of motor vehicles, aiming to promptly eliminate potential safety hazards, encourage enhanced vehicle maintenance, and reduce the occurrence of traffic accidents. The inspection includes: checking for the vehicle's user manual and certificate of conformity, verifying the completeness of factory inspection marks on the vehicle body, measuring the vehicle's external and internal dimensions, wheelbase, and axle track. The inspection is conducted item by item according to technical standards. Upon passing, the initial inspection and modification registration form for motor vehicles is completed, and the vehicle's curb weight, load capacity, passenger capacity, and driver's compartment seating capacity are filled in according to the manufacturer's specifications.

118

Share

Is it normal for the security light to keep flashing?

It is not normal. The security light is a safety warning light. Here are the specific details: Introduction: If the security light is on, it indicates that the vehicle's anti-theft system is in a locked state. After turning off the engine, if you lock the doors and the light flashes, it is normal, as it means the engine's electronic anti-theft lock is active. If it doesn't flash, the anti-theft system may not be engaged, possibly because the doors are not properly closed. Additional Information: The security light flashing could also be a reminder to fasten your seatbelt. Fastening the seatbelt will put the light in a short-circuited state. You can also try restarting the car engine or turning off the main switch to see if these methods can turn off the security light.

109

Share

Can a mortgaged car be purchased without transferring ownership?

It is possible to purchase a mortgaged car without transferring ownership, but only if the mortgage has been cleared. If a car has been mortgaged, it means the ownership rights temporarily do not belong to the original owner. Therefore, the original owner does not have the right to transfer a car that does not currently belong to them to someone else. Purchasing such a car carries significant risks. Considerations when buying a mortgaged car: 1. Verify the source of the mortgaged car: If you intend to purchase a mortgaged car, it is crucial to confirm its source. If the car is stolen or involved in illegal activities, it must not be purchased. Even after purchase, the vehicle may be seized by authorities, leading to substantial financial loss for the buyer. 2. Documentation: Ensure the lending institution provides a clear mortgage agreement and the borrower's identity information.

110

Share