What causes the excessive resistance of the driver's airbag?
2 Answers
The excessive resistance of the driver's side airbag may be due to a loose connector of the airbag. It is recommended to securely fasten the airbag connector under the driver's seat. Here is a partial introduction about the side impact airbag system: 1. It mainly consists of an airbag sensor, an impact airbag, and an electronic control unit. 2. The driver's side impact airbag is located in the steering wheel, while the passenger side impact airbag is usually installed on the dashboard. 3. The airbag sensors are installed on the left, right, and center partitions of the cabin. The central airbag sensor and the airbag system are integrated with the electronic control unit.
I've encountered many cases of excessive resistance during car repairs. Common causes include oxidation and corrosion of metal contacts in connectors leading to poor contact, especially the airbag interface under the steering wheel which is prone to being eroded by sweat and becoming dirty, resulting in increased resistance. Aging wires or rodent damage causing insulation breakdown can lead to intermittent short circuits, making the resistance abnormally high. It could also be that the sensors inside the airbag module itself are damaged, producing erroneous data that triggers warnings. All these may cause the airbag to fail to deploy when needed or deploy accidentally, posing significant risks. During diagnosis, we use a multimeter to measure circuit resistance to pinpoint the issue, then clean off rust or replace components. If you discover such problems, don't delay - promptly visit a professional repair shop for a comprehensive electrical system check to avoid accidents on the road.
