Seat Belt

[66yostagea]

Because of my shoulder reconstruction I have been a passenger for a few weeks. I noticed that sometimes as the ignition is turned off the front passenger seat belt moves ever so slightly. Not a lot but noticeable.

Today, my first drive for six weeks, my son remarked on the belt movement.

Does anyone know what this is?

[stasis]

hmm i will feel for it next ime when i start the engine.

[66yostagea]

hmm i will feel for it next ime when i start the engine.

No, it is as you turn the engine off.

[Terminal]

Yeah i get that too. must be some sort of safety system that tensions the belt when the car is driving, then releases to let it undo easier. that's all i could think it would be

[Red Sky II]

Get the same thing when you turn the ignition off, the seat belts tighten up.

Scared the hell out of my wife, the first time it happened to her

Not sure why it does it though

[Hum@nzee]

Yeah - its the seat bealt pre-tensioner switching on and off I think - electronic type - but I might be wrong.

http://www.tierone.com/seatbeltpretexcerpt.html

[Ska]

Nope you are bang on, it is the belt pre-tensioner

[66yostagea]

Thanx 4 that guys.

[Appealing]

Interstingly the cops are taught to pretension the belts when doing a chase. You suck your guts in and snatch on the belt at the same time, tightening it, and then locking it in place by letting your belly out, but not so that it is uncomfotable. Sure restricts your movement, give it a try, but not in the Stagea, as the pre-tensioners will do the job.

[GoldZilla]

I've never even noticed the pre-tensioners...

[fergo308]

they're actually seat belt DE-tensioners. they're loosened electically so you're more comfortable. if airbags go off (i.e. in a crash) ,they firm up,or when the ignition is turned off,you'll notice them turn off,and normal tension returns to the reels.

celsiors have this as well.

Justin...