Passenger Seat Belt Pretensioner (PBPT)
The Seat Belt Pretensioner (hereinafter referred to BPT) is located at the both side of the center pillar.
The BPT tightens the seat belt before airbag deploys to protect passenger from bumping against crush pad, the steering wheel and the front window.
In the BPT, there are a ignition circuit and a cylinder for rewinding belt.
A cylinder has a piston that rewinds the seatbelt.
A Gas chamber generates expansive force of gases to push piston in cylinder.
CAUTION:
Never measure the resistance of the BPT directly, Current of measuring the device may cause unexpected BPT deploy.