Seat belt pretensioner
When the vehicle is involved in an accident at a certain angle relative to the frontal impact, the inflator is ignited by a signal from the SRSCM.
The gas coming out of the gas generator will cause the piston to move in the cylinder with the gear transmission of the pretensioner.
The gear train rotates the piston pinion, and the satellite rotates the planetary gears.
As a result, the belt is tensioned due to the rotation of the drum. Therefore, a seat belt with a pretensioner reduces the severity of injury to the driver and front passenger by pre-tensioning the belt. This prevents the driver and front passenger from moving forward and from hitting the steering wheel or dashboard.
Seat belt load limiter
The load limiter is designed to reduce the force of impact of the driver and front passenger on the fastened seat belts during a collision. If the collision force reaches a certain value, the torsion bar of the pre-tensioned seat belts deforms and releases the seat belt slightly, reducing the force of the impact.
Removal
1. Disconnect the cable from the negative terminal of the battery.
Warning: Before servicing the airbag system, make sure that at least 30 seconds have passed after the ignition has been turned off and the negative battery cable has been disconnected.
2. Remove the threshold trim mounting screws.
3. Remove the front seat belt lower mounting bolt and use a flat-head screwdriver to lift up and remove the B-pillar trim.
4. Remove the front seat belt upper mounting bolt.
5. Remove the front seat belt tensioner mounting bolt and remove the belt from the vehicle.
- 1. Do not disassemble or repair the seat belt pretensioner module.
- 2. Do not drop the seat belt pretensioner module or allow it to come into contact with water, grease, etc. If dents, cracks, deformation, or corrosion are found, replace the module.
- 3. Do not expose the seat belt pretensioner module to temperatures above 93°C.
- 4. The seat belt pretensioner module operates only once.
- 5. When disposing of a deactivated module, use protective glasses and gloves.