What is a car airbag
The front passenger airbag of a car is a passive safety device installed in front of the front passenger seat, used to protect the safety of occupants in the event of a vehicle collision. Its working principle is as follows:
Working principle
When a vehicle undergoes a severe collision, the sensor detects the impact and triggers the gas generator, which quickly fills the gas bag with nitrogen to expand it, forming a buffer layer between the occupants and the interior components, reducing the impact injuries to the head and chest.
Location and Identification
The "SRS" logo is usually located above the glove box on the dashboard in front of the passenger seat. The driver's airbag is located in the center of the steering wheel.
Precautions
Youdaoplaceholder0 Use of seat belts in conjunction : Airbags need to work in coordination with seat belts. Not wearing a seat belt may increase the risk of collision.
Youdaoplaceholder0 Children not allowed : Children should not sit in the front row, otherwise they may be injured by the impact force when the airbag deploys.
Youdaoplaceholder0 Regular inspection : Keep the airbag area clean to avoid blocking the sensor or hindering normal deployment.
The front passenger airbag (secondary airbag) of a car mainly provides the following protection functions in the event of a vehicle collision:
Protect key parts
The front passenger airbag is installed on the dashboard or above the glove compartment directly in front of the passenger seat. In the event of a collision, it can quickly inflate within 50 milliseconds to form an air cushion, buffering the head and chest impact caused by inertia on the occupants and reducing the risk of injury. [1 Airbag systems (SRS) are usually used in conjunction with seat belts to form secondary protection. .
Use in conjunction with seat belts
Airbags need to be activated simultaneously with seat belts to achieve their maximum effectiveness. Using it alone may increase the risk of injury due to the impact force when the airbag deplores. For example, when the seat belt is not worn, it may cause the occupant to be thrown out of the vehicle or hit the interior components.
Application in special scenarios
When a child seat is installed in the front passenger seat, the airbag can be manually turned off to prevent accidental triggering. It is necessary to keep the airbag area clean on a daily basis to avoid blocking the signs or hindering the deployment trajectory.
Precautions
Avoid placing heavy objects on the center console to prevent interference with the normal deployment of the airbags.
It is recommended to check the aging of system components every 8 to 10 years.
Seat covers should be kept away from the area marked "SIDE AIRBAG" to avoid affecting the function of the side airbags.
Secondary airbag malfunctions are usually caused by poor circuit contact, sensor damage or control unit failure. Timely maintenance is required to ensure safety. The airbag system involves multiple components such as sensors, control units, and wiring harnesses working in coordination. Any abnormality in any link may cause the fault light to come on. Youdaoplaceholder0.
Common causes
Poor contact of the wiring harness
Seat movement or dust accumulation may cause the wire harness plug to loosen or oxidize, accounting for 45% of the causes of faults. For instance, frequent movement of the front passenger seat may cause a loose connection of the wiring harness. The problem can be solved by cleaning the contacts and re-plugging and unplugging them.
Sensor damage
Faults in the front passenger collision sensor or seat belt pre-tensioning sensor may trigger warnings, accounting for 20% of the causes of faults. Minor rear-end collisions or moisture in the sensor may both trigger fault codes.
Control unit failure
If the internal solder joints of the airbag computer (ACU) fall off or the voltage is unstable, it may cause the system to crash, accounting for 15% of the causes of failure.
Module aging or modification influence
The service life of the secondary airbag module is approximately 8 to 10 years. After aging, it may not be able to deploy normally. Modifying metal decorations or cushions may interfere with signal transmission.
Judgment of urgency
Youdaoplaceholder0 high-risk : Control unit or module failure (such as showing "SRSAIRBAGFAIL"), immediate repair is required
Risk in : sensor or wiring harness issues (such as "AIRBAG SERVICE REQUIRED") may delay deployment
Youdaoplaceholder0 Low risk : Occasional signal interference (such as accidental triggering when passing over speed bumps), disappears after restart
It is recommended to first check the status of the wiring harness and plug under the seat. If the problem cannot be solved, it is necessary to go to a professional repair point to inspect the sensor and control unit.
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