FAST TECHNICAL VERSION
Seat-belt pretensioner
A mechanism rapidly removing belt slack at the start of a crash.
Key facts
Knowledge domainTechnical foundation
Connected categorypassive-safety
VerificationSource and vehicle variant are evaluated together
System layerPasif güvenlik
Core architectureSensor / control / actuator
Variant requirementVehicle + year + market + software
Overview
Seat-belt pretensioner is treated as a complete vehicle-system function rather than one component.
Its implementation combines sensing, control logic, wiring/software and physical actuation.
Exact pins, thresholds, capacities and calibrations depend on vehicle, model year, market and controller version.
Operating principle
- Airbag ve kemer gergileri
Main components
- Airbag ve kemer gergileri
Diagnostic and service approach
- Compare commanded values with actual physical response.
- Interpret companion DTCs, freeze frame and live data together.
Variant and safety boundary
- The same marketing name may use different hardware and software across generations.
- Numeric service data is published only for an exact vehicle variant.
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