sensor MAZDA MODEL 3 SEDAN 2019 User Guide

Do not hang net bags, map pouches or
backpacks with side straps on the front
seats. Never use seat covers on the front
seats. Always keep the side air bag modules
in your front seats free to deploy in the
event of a side collision.
Do not attach objects on or around the
area where a curtain air bag deploys:
Attaching objects to the areas where the
curtain air bag activates such as on the
windshield glass, side door glass, front and
rear window pillars and along the roof
edge and assist grips is dangerous. In an
accident the object could interfere with the
curtain air bag, which inflates from the
front and rear window pillars and along
the roof edge, impeding the added
protection of the curtain air bag system or
redirecting the air bag in a way that is
dangerous. Furthermore, the bag could be
cut open releasing the gas.
Do not place hangers or any other objects
on the assist grips. When hanging clothes,
hang them on the coat hook directly.
Always keep the curtain air bag modules
free to deploy in the event of a side collision
or roll-over accident.
Do not touch the components of the
supplemental restraint system after the air
bags have inflated:
Touching the components of the
supplemental restraint system after the air
bags have inflated is dangerous.
Immediately after inflation, they are very
hot. You could get burned.Never install any front-end equipment to
your vehicle:
Installation of front-end equipment, such
as frontal protection bar (kangaroo bar,
bull bar, push bar, or other similar devices),
snowplow, or winches, is dangerous. The
air bag crash sensor system could be
affected. This could cause air bags to
inflate unexpectedly, or it could prevent the
air bags from inflating during an accident.
Front occupants could be seriously injured.
Do not modify the suspension:
Modifying the vehicle suspension is
dangerous. If the vehi cle's height or the
suspension is modified, the vehicle will be
unable to accurately detect a collision or
roll-over accident resulting in incorrect or
unexpected air bag deployment and the
possibility of serious injuries.
To prevent false detection by the air bag
sensor system, heed the following:
 Do not use tires or wheels other than
those
specified for your Mazda:
Use of any tire or wheel other than those specified for your Mazda (page 9-9) is
dangerous. Use of such wheels will
prevent the vehicle's accident detections
system from accurately detecting a
collision or roll-over accident resulting in
incorrect or unexpected air bag
deployment and the possibility of serious
injuries.
Essential Safety Equipment
SRS Air Bags
2-58
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

Do not overload your vehicle:
Overloading your vehicle is dangerous as
it could prevent the air bag crash sensor
system from accurately detecting a
collision or roll-over accident resulting in
incorrect or unexpected air bag
deployment and the possibility of serious
injuries. The gross axle weight rating
(GAWR) and the gross vehicle weight
rating (GVWR) for your vehicle are on the
Motor Vehicle Safety Standard Label on
the driver's door frame. Do not exceed
these ratings.
 Do not drive the vehicle off-road:
Driving your Mazda off-road is
dangerous because the vehicle has not
been designed to do so. Driving the
vehicle off-road could prevent the air bag
crash sensor system from accurately
detecting a collision or roll-over accident
resulting in incorrect or unexpected air
bag deployment and the possibility of
serious injuries.Do not modify a front door or leave any
damage unrepaired. Always have an
Authorized Mazda Dealer inspect a
damaged front door:
Modifying a front door or leaving any
damage unrepaired is dangerous. Each
front door has a side crash sensor as a
component of the supplemental restraint
system. If holes are drilled in a front door, a
door speaker is left removed, or a damaged
door is left unrepaired, the sensor could be
adversely affected causing it to not detect
the pressure of an impact correctly during a
side collision. If a sensor does not detect a
side impact correctly, the side and curtain
air bags and the front seat belt
pretensioner may not operate normally
which could result in serious injury to
occupants.
Do not modify the supplemental restraint
system:
Modifying the components or wiring of the
supplemental restraint system is
dangerous. You could accidentally activate
it or make it inoperable. Do not make any
modifications to the supplemental restraint
system. This includes installing trim,
badges, or anything else over the air bag
modules. It also includes installing extra
electrical equipment on or near system
components or wiring. An Authorized
Mazda Dealer can provide the special care
needed in the removal and installation of
front seats. It is important to protect the air
bag wiring and connections to assure that
the bags do not accidentally deploy, and
that the front passenger occupant
classification system and the seats retain
an undamaged air bag connection.
Essential Safety Equipment
SRS Air Bags
2-59
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

Do not place luggage or other objects
under the front seats:
Placing luggage or other objects under the
front seats is dangerous. The components
essential to the supplemental restraint
system could be damaged, and in the event
of a side collision, the appropriate air bags
may not deploy, which could result in
death or serious injury. To prevent damage
to the components essential to the
supplemental restraint system, do not
place luggage or other objects under the
front seats.
Do not operate a vehicle with damaged air
bag/seat belt pretensioner system
components:
Expended or damaged air bag/seat belt
pretensioner system components must be
replaced after any collision which caused
them to deploy or damage them. Only a
trained Authorized Mazda Dealer can fully
evaluate these systems to see that they will
work in any subsequent accident. Driving
with an expended or damaged air bag or
pretensioner unit will not afford you the
necessary protection in the event of any
subsequent accident which could result in
serious injury or death.
Do not remove interior air bag parts:
Removing any components such as the
front seats, front dashboard, the steering
wheel or parts on the front and rear
window pillars and al ong the roof edge,
containing air bag parts or sensors is
dangerous. These parts contain essential
air bag components. The air bag could
accidentally activate and cause serious
injuries. Always have an Authorized Mazda
Dealer remove these parts.Properly dispose of the air bag system:
Improper disposal of an air bag or a vehicle
with live air bags in it can be extremely
dangerous. Unless all safety procedures are
followed, injury could result. Have an
Authorized Mazda Deal er safely dispose of
the air bag system or scrap an air bag
equipped vehicle.
NOTE
If it becomes necessary to have the
components or wiring system for the
supplementary restraint system modified
to accommodate a person with certain
medical conditions in accordance with a
certified physician, contact an
Authorized Mazda Dealer, refer to
“Customer Assistance (U.S.A.)” (page
8-2).
When an air bag deploys, a loud
inflation noise can be heard and some
smoke will be released. Neither is likely
to cause injury, however, the texture of
the air bags may cause light skin
injuries on body parts not covered with
clothing through friction.
Should you sell your Mazda, we urge
you to tell the new owner of its air bag
systems and that familiarization with all
instructions about them, from the
Owner's Manual, is important.
Essential Safety Equipment
SRS Air Bags
2-60
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

(Without Front Passenger Occupant Classification System)


1. Side and curtain inflators and air bags
2. Side crash sensors
3. Roll-over sensor
*, crash sensors, and diagnostic module (SAS unit)
4. Driver/Front passenger inflators and air bags
5. Air bag/front seat belt preten sioner system warning indication/warning light (page
7-31)
6. Driver/Front passenger kn ee inflators and air bags
*
7. Front passenger air bag deactivation indicator light* (page 2-72)
8. Front air bag sensors
9. Seat belt pretensioners (page 2-28)
10. Front passenger seat weight sensors
* (page 2-72)
11. Front passenger seat wei ght sensor control module
*
12. Driver and front passenger seat belt buckle switches* (page 2-76)
13. Driver seat slide position sensor
* (page 2-71)
Essential Safety Equipment
SRS Air Bags
*Some models.2-63
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

How the SRS Air BagsWo r k
▼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 Bel
t 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 collis ion or a roll-over
accident is detected. The pretensioners
operate differently depending on what
types of air bags are equipped. For more
details about seat belt pretensioner
operation, refer to the SRS Air Bag
Deployment Criteria (page 2-68).
▼ 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 inflates 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 2-68).
(With Front Passenger Occupant
Classification System)
The driver's dual-stag e air bag controls air
bag inflation 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.
Essential Safety Equipment
SRS Air Bags
2-64
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

▼Front Passenger Air Bag
The front passenger air bag is mounted in
the front passenger dashboard.
The inflation mechanism for the front
passenger air bag is the same as the
driver's air bag.
For more details about air bag
deployment, refer to "SRS Air Bag
Deployment Crite
ria" (page 2-68).
(With Front Passenger Occupant
Classification 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 classification
system (page 2-71).
▼ Driver and Front Passenger Knee
Air Bags*
The knee air bags are equipped under the
instrument panel.
If the air bag crash
sensors receive a
frontal impact of greater than moderate
force, the knee air bags deploy
immediately to reduce impact to the driver
and front passenger's legs.
For more details about air bag
deployment, refer to "SRS Air Bag
Deployment Criteria" (page 2-68).
▼ 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 inflates the side air bag only on
the side in which the vehicle was hit. The
side air bag inflates 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 2-68).
Essential Safety Equipment
SRS Air Bags
*Some models.2-65
Mazda3_8HE9-EA-18K_Edition3
2018-11-21 14:31:58

(With Front Passenger Occupant
Classification 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
classification system (page 2-71).

▼ 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 cra
sh sensors detect a
side impact of greater than moderate force,
the curtain air bag inflates quickly and
helps to reduce injury mainly to the driver
and front and rear outboard passengers'
heads caused by direct ly hitting interior
parts such as a door or window.
For more details about air bag
deployment, refer to "SRS Air Bag
Deployment Criteria" (page 2-68).
In a side impact:
Greater than moderate impact to one side
of the vehicle will cau se the curtain air bag
on that side only to inflate.

Only one side curtain air bag will deploy
on the side of the veh icle that receives the
force of an impact.
(With Front Passenger Occupant
Classification System)
In a roll-over:
In response to a vehicle roll-over, both
curtain air bags inflate.

Both curtain air bags will deploy after the
roll-over accident is detected.
Essential Safety Equipment
SRS Air Bags
2-66
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

Limitations to roll-over detection (With
Front Passenger Occupant
Classification System):
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
Driver and Front
Passenger Occupant
Classification System
*
▼ Driver and Front Passenger
Occupant Classification System
First, please read "Supplemental Restraint
System (SRS) Precau
tions" (page 2-55)
carefully.
▼ Driver Seat Slide Position Sensor
Your vehicle is equipped with a driver seat
slide position sensor as a part of the
supplemental restrain
t system. The sensor
is located under the driver seat.
The sensor determines whether the driver
seat is fore or aft of a reference position
and sends the seat position to the
diagnostic module (SAS unit).
The SAS unit is designed to control the
deployment of the driver air bag
depending on how close the driver seat is
to the steering wheel.
The air bag/front seat belt pretensioner
system warning light flashes if the sensor
has a possible malfunction (page 2-67).
Essential Safety Equipment
SRS Air Bags
*Some models.2-71
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

▼Front Passenger Seat Weight
Sensors
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
knee 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 fr ont passenger air bag,
the system deactivates the front passenger
front and side air bags and knee 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 knee 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 flashes 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
knee 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 knee air bags, and seat belt
pretensioners 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:
Essential Safety Equipment
SRS Air Bags
2-72
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58

Front passenger air bag deactivation in‐
dicator light on/off condition chart
Conditiondetected by the
front pas‐
senger oc‐ cupant
classifica‐
tion system Front pas‐
senger air
bag deacti‐
vation indi‐ cator light Front pas‐
senger
front and side andknee air bags Front
passenger seat beltpreten‐ sioner
system
Empty (Not
occupied) On Deactivated
Deactivat‐
ed
Child or
child-re‐
straint sys‐
tem
*1
On Deactivated Deactivat‐
ed
Adult
*2Off Ready Ready
*1 If a larger child sits on the front passenger seat, the sensors might detect the child as being an
adult depending on the child's physique.
*2 If a smaller adult sits on the front passenger seat,
the sensors might detect the person as being a
child depending on the person's physique.
The curtain air bag is ready for inflating regardless of
what the front passenger air bag deactivation
indicator light on/off condition chart indicates.

If the front passenger air bag deactivation
indicator light does not illuminate when
the ignition is switched ON and does not
illuminate as indicated in the front
passenger air bag deactivation indicator
light on/off condition chart, do not allow a
child to sit in the front passenger seat and
consult an Authorized Mazda Dealer as
soon as possible. The system may not
work properly in an accident.
WA R N I N G
Do not decrease the total seated weight on
the front passenger seat:
When an adult or large child sits on the
front passenger seat, decreasing the total
seated weight on the front passenger seat
required for air bag deployment is
dangerous. The front passenger seat
weight sensors will de tect the reduced total
seated weight condition and the front
passenger front and side air bags and knee
air bags, and the seat belt pretensioner
system will not deploy during an accident.
The front passenger will not have the
supplementary protection of the air bag,
which could result in serious injury.
Decreasing the total seated weight on the
front passenger seat could result in an air
bag not deploying under the following
conditions, for example:
Essential Safety Equipment
SRS Air Bags
2-73
Mazda3_8HE9-EA-18K_Edition3 2018-11-21 14:31:58