Front Seat Belt Pretensioner and Load Limiting Systems; Essential Safety Equipment; Seat Belt Systems- Page 37

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Essential Safety Equipment

Seat Belt Systems

Front Seat Belt 

Pretensioner and Load 

Limiting Systems

For optimum protection, the driver and 

front passenger seat belts are equipped 

with pretensioner and load limiting 

systems. For both these systems to work 

properly you must wear the seat belt 

properly.

Pretensioners:

When a collision is detected, the 

pretensioners deploy simultaneously with 

the air bags.

For vehicles with the front passenger 

occupant classification system, the 

pretensioners deploy simultaneously 

with the air bags when a roll-over is also 

detected.

For deployment details, refer to the SRS 

Air Bag Deployment Criteria (page 

2-62).

The front seat belt retractors remove slack 

quickly as the air bags are expanding. 

Any time the air bags and seat belt 

pretensioners have fired they must be 

replaced.

A system malfunction or operation 

conditions are indicated by a warning.

Refer to Warning/Indicator Lights on page 

4-32.

Refer to Air Bag/Front Seat Belt 

Pretensioner System Warning Beep on 

page 7-45.

(With Front Passenger Occupant 

Classification System)

In addition, the pretensioner system for 

the front passenger, like the front and side 

passenger air bag, is designed to only 

deploy when the front passenger occupant 

classification sensor detects a passenger 

sitting on the front passenger's seat.

For details, refer to the front passenger 

occupant classification sensor (page 

2-65).

Load limiter:

The load limiting system releases belt 

webbing in a controlled manner to reduce 

belt force on the occupant's chest. While 

the most severe load on a seat belt occurs 

in frontal collisions, the load limiter has 

an automatic mechanical function and 

can activate in any accident mode with 

sufficient occupant movement.

Even if the pretensioners have not fired, 

the load limiting function must be checked 

by an Authorized Mazda Dealer.

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