MAZDA MODEL 3 HATCHBACK 2016 (in English) Repair Manual

2–47
Essential Safety Equipment
SRS Air Bags
Supplemental Restraint System Components
(With Front Passenger Occupant Classi¿ cation System)



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2–48
Essential Safety Equipment
SRS Air Bags
*Some models.
(Without Front Passenger Occupant Classi¿ cation System)




Driver/Front passenger inÀ ators and air bags

Roll-over sensor * , crash sensors, and diagnostic module (SAS unit)

Seat belt pretensioners (page 2-17 )

Front air bag sensors

Side crash sensors *

Air bag/seat belt pretensioner system warning light (page 4-20 )

Side and curtain inÀ ators and air bags *

Front passenger air bag deactivation indicator light (page 2-56 )

Front passenger seat weight sensors (page 2-56 )

Front passenger seat weight sensor control module

Driver and front passenger seat belt buckle switches (page 2-60 )
N O T E
- are equipped only on models with the front passenger occupant classi¿ cation system.
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2–49
Essential Safety Equipment
SRS Air Bags
How the SRS Air Bags Work
Your Mazda is equipped with the following types of SRS air bags. SRS air bags are
designed to work together with the seat belts to help to reduce injuries during an accident.
The SRS air bags are designed to provide further protection for passengers in addition to the
seat belt functions. Be sure to wear seat belts properly.
Front Seat Belt Pretensioners
The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near
frontal collisions.
In addition, the pretensioners operate when a side collision (only on the side in which the
collision occurs) or a roll-over accident is detected. The pretensioners operate differently
depending on what types of air bags are equipped. For details on the seat belt pretensioner
operation, refer to the SRS Air Bag Deployment Criteria (page 2-53 ).
Driver Air Bag
The driver's air bag is mounted in the steering wheel.
When air bag crash sensors detect a frontal impact of greater than moderate force, the
driver's air bag inÀ ates quickly helping to reduce injury mainly to the driver's head or chest
caused by directly hitting the steering wheel.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-53 ).
(With Front Passenger Occupant Classi¿ cation System)
The driver's dual-stage air bag controls air bag inÀ ation in two energy stages. During an
impact of moderate severity, the driver's air bag deploys with lesser energy, whereas during
more severe impacts, it deploys with more energy.


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2–50
Essential Safety Equipment
SRS Air Bags
*Some models.
Front Passenger Air Bag
The front passenger air bag is mounted in the front passenger dashboard.
The inÀ ation mechanism for the front passenger air bag is the same as the driver's air bag, as
mentioned above.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-53 ).
(With Front Passenger Occupant Classi¿ cation System)
In addition, the front passenger air bag is designed to only deploy in accordance with the
total seated weight on the front passenger seat. For details, refer to the front passenger
occupant classi¿ cation system (page 2-56 ).


Side Air Bags *
The side air bags are mounted in the outboard sides of the front seatbacks.
When the air bag crash sensors detect a side impact of greater than moderate force, the
system inÀ ates the side air bag only on the side in which the vehicle was hit. The side
air bag inÀ ates quickly to reduce injury to the driver or front passenger's chest caused by
directly hitting interior parts such as a door or window.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-53 ).
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2–51
Essential Safety Equipment
SRS Air Bags
*Some models.

(With Front Passenger Occupant Classi¿ cation System)
In addition, the front passenger side air bag is designed to only deploy in accordance with
the total seated weight on the front passenger seat. For details, refer to the front passenger
occupant classi¿ cation system (page 2-56 ).



Curtain Air Bags *
The curtain air bags are mounted in the front and rear window pillars, and the roof edge
along both sides.
When the air bag crash sensors detect a side impact of greater than moderate force, the
curtain air bag inÀ ates quickly and helps to reduce injury mainly to the rear outboard
passenger's head caused by directly hitting interior parts such as a door or window.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria"
(page 2-53 ).
In a side impact:
Greater than moderate impact to one side of the vehicle will cause the curtain air bag on that
side only to inÀ ate.


Only one side curtain air bag will deploy on the
side of the vehicle that receives the force of an
impact.

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2–52
Essential Safety Equipment
SRS Air Bags
(With Front Passenger Occupant Classi¿ cation System)
In a roll-over:
In response to a vehicle roll-over, both curtain air bags inÀ ate.


Both curtain air bags will deploy after
the roll-over accident is detected.

(With Front Passenger Occupant Classi¿ cation System)
In an angled collision:
During a collision, the driver and front passenger's air bags will deploy. Depending on the
nature of the impact, the side air bag and the curtain air bag may deploy.



Warning Light/Beep
A system malfunction or operation conditions are indicated by a warning.
Refer to Warning/Indicator Lights on page 4-20 .
Refer to Warning Sound is Activated on page 7-35 .
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2–53
Essential Safety Equipment
SRS Air Bags
*Some models.
SRS Air Bag Deployment Criteria
This chart indicates the applicable SRS equipment that will deploy depending on the type of
collision.
(The illustrations are the representative cases of collisions.)

SRS
equipment Types of collision
A severe frontal/near frontal
collision A severe side
collision
*4 A roll-over/near
roll-over *3 A rear collision












Front
seat belt
pretensioner X
*1 (both sides) X *1 (impact side
only) X *1 (both sides)
No air bag and
front seat belt
pretensioner will be
activated in a rear
collision. Driver air
bag X
Front
passenger
air bag X
*1
Side air bag
* X *2 X *1 (impact side
only)
Curtain air
bag
* X *2 X (impact side
only) X (both sides)
X: The SRS air bag equipment is designed to deploy in a collision.
*1 (With Front Passenger Occupant Classi¿ cation System)
The front passenger front and side air bags and the seat belt pretensioner are designed to deploy depending on
the condition of the total seated weight on the front passenger seat.
*2 (With Front Passenger Occupant Classi¿ cation System)
In an angled collision, the side air bag and curtain air bag may deploy.
*3 (With Front Passenger Occupant Classi¿ cation System)
In a roll-over accident, the seat belt pretensioners and the curtain air bags deploy.
*4 (With Side/Curtain Air Bags)
In a side collision, the seat belt pretensioners and the side/curtain air bags deploy (only on the side in which the
collision occurs).


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2–54
Essential Safety Equipment
SRS Air Bags
Limitations to SRS Air Bag
In severe collisions such as those described previously in "SRS Air Bag Deployment
Criteria", the applicable SRS air bag equipment will deploy. However, in some accidents,
the equipment may not deploy depending on the type of collision and its severity.

Limitations to front/near front collision detection:
The following illustrations are examples of front/near front collisions that may not be
detected as severe enough to deploy the SRS air bag equipment.


Impacts involving trees or polesFrontal offset impact to the vehicle



Rear-ending or running under a truck's tail gate

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2–55
Essential Safety Equipment
SRS Air Bags
Limitations to side collision detection:
The following illustrations are examples of side collisions that may not be detected as severe
enough to deploy the SRS air bag equipment.


Side impacts involving trees or polesSide impacts with two-wheeled vehicles



Roll-over (Without Front Passenger Occupant Classification System)

(With Front Passenger Occupant Classi¿ cation System)
Limitations to roll-over detection:
The following illustration is an example of an accident that may not be detected as a roll-
over accident. Therefore, the front seat belt pretensioners and curtain air bags may not
deploy.


Pitch end over end

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2–56
Essential Safety Equipment
SRS Air Bags
*Some models.
Front Passenger Occupant Classi¿ cation System *
First, please read "Supplemental Restraint System (SRS) Precautions" (page 2-40 )
carefully.
Front Passenger Seat Weight Sensor
Your vehicle is equipped with a front passenger seat weight sensors as a part of the
supplemental restraint system. These sensors are located under both of the front passenger
seat rails. These sensors determine the total seated weight on the front passenger seat and
monitor the seat belt buckle for the front passenger seat. The SAS unit is designed to prevent
the front passenger front and side air bags and seat belt pretensioner system from deploying
if the front passenger air bag deactivation indicator light illuminates.
To reduce the chance of injuries caused by deployment of the front passenger air bag,
the system deactivates the front passenger front and side air bags and also the seat
belt pretensioner system when the front passenger air bag deactivation indicator light
illuminates. Refer to the following table for the front passenger air bag deactivation
indicator light illumination conditions.

This system shuts off the front passenger front and side air bags and seat belt pretensioner
system, so make sure the front passenger air bag deactivation indicator light illuminates
according to the following table.

The air bag/front seat belt pretensioner system warning light À ashes and the front passenger
air bag deactivation indicator light illuminates if the sensors have a possible malfunction.
If this happens, the front passenger front and side air bags and seat belt pretensioner system
will not deploy.
Front passenger air bag deactivation indicator light
This indicator light illuminates to remind you that the front passenger front and side air bags
and seat belt pretensioner will not deploy during a collision.


If the front passenger weight sensors are normal, the indicator light illuminates when the
ignition is switched ON. The light turns off after a few seconds. Then, the indicator light
illuminates or is off under the following conditions:

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