Let's first understand principle: if you don't fasten your seatbelt, you will call police.
The "seat belt warning" icon on dashboard of a vehicle without a seat belt will illuminate because system has detected that you are not "wearing a seat belt". Did you find that you are not wearing your seatbelt? fastened with a seat belt?
The key is to have your butt touch pressure sensor inside seat to decide whether to activate seatbelt warning.
Some people say how difficult it is to place sensors and other components on seat belt buckles? In fact, this is not case, if co-pilot is not sitting and, of course, does not need to fasten seat belt, then co-pilot's prompt about not wearing a seat belt should not cause alarm. Therefore, if there is no passenger in co-driver, seat belt warning device will not work, and alarm will work only when passenger is sitting, seat belt is not fastened and car is moving.
Of course, all of above is an illustration of general situation. We know her mystery lies in seat cushion, but her contribution lies in Seat Belt Reminder (SBR) device. The SBR consists of a driver's seat belt trigger, a co-pilot's seat belt trigger, a passenger seat pressure switch, a gear position trigger, a speaker circuit, and a power supply.
The power supply is connected to gear position trigger switch, and gear position trigger switch is respectively connected to driver's seat belt trigger switch and passenger's seat pressure switch. The seat belt pressure sensor is appropriately connected to speaker circuit.
Most car seat cushions have a pressure sensor built into seat cushion. When car reaches a certain speed, sensor is triggered and seat belt is not fastened, alarm will sound.
Of course, if horn goes off before co-pilot gets on it, then one of fuses (the most suspect) has blown. be a seat The car's pressure sensor is broken, and its replacement is very troublesome. You need to disassemble seat and disassemble trim, and then sew it back after installation.
I really hope that reason why sensor is not connected is more successful.
Therefore, if seat belt warning light does not sound an alarm when you are not wearing a seat belt, you should check if sensor under seat is working.
Some car owners will use a seat belt buckle to fool seat belt socket to signal that seat belt has been buckled, but this "method" is definitely not a good method. Although co-pilot's seat sensor is triggered, car will still think co-pilot is wearing a seat belt because seat belt buckle is fooling co-pilot's seat belt start switch.
Although seat belt buckle works on same principle as seat belt, it fools sensor regardless of safety. This is completely deceptive!
Do not try to trick seat belt. The main function of seat belt is to secure passengers to seat in event of a vehicle collision in order to avoid secondary collisions. In a car collision, secondary collision is main cause of injury to vehicle members. For safety reasons, it is best to wear your seat belt honestly.
For some vehicles, hint will only be given when vehicle speed reaches a certain value, and system will not give a hint if vehicle speed does not reach a certain value without being detected.
Some vehicles do not have seat belts. If speed is less than 20 km/h, there is no reminder or alarm. Only when speed exceeds this speed, reminder or alarm is triggered. Some of them are. In some cars, while car is starting, there will be a reminder. If not, I can only suggest going to a 4S store to check it out.