198001522 - 7065 SEAT BELTS AND ACCESSORIES

SEAT BELTS

The vehicle is fitted with seat belts with three mounting points, even for the third rear passenger, with an automatic inertia reel.The seat belts for the front seats and, on some versions, for the side rear seats, have electricall operated pretensioners and a load limiter.The seat belts for the front seats are height adjustable and can assume 4 different positions.The rear seats have seat belts with an inertia reel, located in the pillars and a load limiter (on the reel) with three point mountings for the side seats, whilst the middle seat has a seat belt with a three point mounting and an inertia reel housed in the rear seat backrest.

Seat belts not fastened signal

The vehicle is equipped with a S.B.R. (Seat Belt Reminder) system consisting of a buzzer that notifies the driver and the front passenger that their seat belt is not fastened complemented by a flashing seat belt unfastened warning light on the instrument panel.If the seat belts are fastened during the cycle, the warning cycle is automatically interrupted and is only repeated if the seat belt not fastened condition is detected once again.The warning cycle can be temporarily or permanently deactivated using the (Examiner) diagnostic equipment during a dialogue with the instrument panel.    See descriptions 5560 INSTRUMENTS

Seat belts with pretensioners

Activation of the seat belt pretensioners is controlled by the same strategy as the air bags. They have the function of recovering any slack in the seat belt and retaining the occupant from the very start of the impact by reducing the overall movement of the occupant inside the passenger compartment.The pretensioners are fitted on the reel.The belts are also fitted with load limiters that lessen the force transmitted by the belts on the chest, coupled with the air bags with the function of restraining the occupant in the case of an impact.PretensionersThe pretensioners are pyrotechnic devices that are activated electrically by means of a signal from the electronic control unit. They are built into the reel of the front seat belts. Activation of the seat belt pretensioners is controlled by the same strategy as the air bags.The pretensioners are designed to take up slack in the seat belt to ensure it holds the occupant against the backrest from the first moments of impact, thus reducing movement inside the passenger compartment.For more details,    See descriptions 5580C AIR BAG SYSTEM

Once the pretensioners have been activated, the belts are locked and must be replaced.

Automatic reel with load limiter

The seat belts are also fitted with load limiters which decrease the force transmitted by the belts to the chest: the force level at which the limiters act is sufficient to considerably reduce the risk of fracturing shoulder blades and ribs, even in people with brittle bones (e.g. the elderly).1 - Pretensioner2 - Belt3 - Reel mechanismOperationThe force limitation is made possible by the use of a torsion bar (2). On the tension side (3), the torsion bar is connected to the reel shaft (1). On the locking side (6), the locking wheel (4) forms one piece with the torsion bar.If activated, the stop pawl (5) stops the locking wheel. In the case of an impact, the reel shaft, pulled by the seat belt, is made to rotate in the opposite direction to the locking.The torsion bar has been designed to start turning from the moment a precise traction force is exerted on the seat belt. In this case the seat belt is released as a result. The reel shaft can complete a maximum of 5 revolutions.

Rear seat belts

The rear seat has three point mounting inertia reel seat belts for the side seats and the middle one.The reel side belt reels are equipped with a load limiter and, on some versions, an electrically operated pretensioner similar to the one described for the front seat belts.They are located in the side pillars, at the side of the backrest.The reel for the rear middle seat belt is located inside the rear seat backrest.