Nissan Murano Z51. Instruction — part 1353
SRC-182
< SYSTEM DESCRIPTION >
[FOR MEXICO]
SRS AIR BAG SYSTEM
SYSTEM DESCRIPTION
SRS AIR BAG SYSTEM
System Diagram
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System Description
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Supplemental Restraint System (SRS) activates air bag module and seal belt pre-tensioner when it detects a
frontal collision or a side collision that is more than the specified limit. Together with other safety devices, it
reduces the impact that occupant receives when vehicle collision occurs.
Air bag sensor unit supplies power supply to air bag module and pre-tensioner seat belt when deceleration
that is more than the specified limit is detected by G sensor in air bag diagnosis sensor unit, crash zone sen-
JMHIA0500GB
SRS AIR BAG SYSTEM
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< SYSTEM DESCRIPTION >
[FOR MEXICO]
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sor, or satellite sensor. Air bag module is composed of electric igniter (squib), filter, pyrotechnic material, and
gas generating material. When air bag module receives a signal from air bag sensor unit, air bag module
ignites pyrotechnic material using electric igniter (squib) so that gas generating material generates high tem-
perature nitrogen gas. The gas through filter activates air bag and seat belt pre-tensioner.
AIR BAG DIAGNOSIS SENSOR UNIT FUNCTIONS
Air bag diagnosis sensor unit has the following functions.
• Detects a collision and supplies the energy for deploying air bag and seat belt pre-tensioner.
• Detects and records electrical malfunction in air bag system and seat belt pre-tensioner system, and blinking
air bag warning lamp.
• Detects and records the deployment of air bag and seat belt pre-tensioner, and turns ON air bag warning
lamp.
• Indicates malfunctioning portion via the number of blinks from the air bag warning lamp in the diagnosis
mode.
• Indicates the malfunction record via CONSULT-III.
COLLISION MODES
The operation of SRS is different depending on the collision modes applications. For example, the driver air
bag module, passenger air bag module, and seat belt pre-tensioner are activated in a frontal collision but not
in a side collision.
SRS configurations that are activated for the following collision modes.
×
: Apply —: Not apply
Collision Mode
Driver air
bag mod-
ule
Front pas-
senger air
bag mod-
ule
Front LH
seat belt
pre-ten-
sioner
Front RH
seat belt
pre-ten-
sioner
Front LH-
side air
bag mod-
ule
Front RH
side air
bag mod-
ule
LH side
curtain air
bag mod-
ule
RH side
curtain air
bag mod-
ule
Frontal collision
×
×
×
×
—
—
—
—
Left side collision
—
—
—
—
×
—
×
—
Right side collision
—
—
—
—
—
×
—
×
SRC-184
< SYSTEM DESCRIPTION >
[FOR MEXICO]
SRS AIR BAG SYSTEM
Component Parts Location
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Component Description
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1.
Front passenger air bag module
2.
Driver air bag module
3.
Combination switch (Spiral cable)
4.
Front passenger air bag OFF indica-
tor
5.
Air bag diagnosis sensor unit
6.
Satellite sensor (LH/RH)
7.
Front seat belt pre-tensioner (LH/
RH)
8.
Seat belt buckle switch (Driver side/
Passenger side)
9.
Front side air bag module (LH/RH)
10. Side curtain air bag module
11.
Crash zone sensor
12. Occupant Classification System seat
sensor mat
13. Occupant Classification System con-
trol unit
JMHIA0493ZZ
Component
Function
Air bag diagnosis sensor unit
Detects a collision and supplies power supply for deployment to air bag module and
pre-tensioner seat belt.
Air bag module
• Driver
• Passenger
• Side
• Curtain
Receives signal from air bag diagnosis sensor unit and deploys air bag.
Seat belt pre-tensioner
Receives signal from air bag diagnosis sensor unit and deploys seat belt pre-tension-
er.
Seat belt buckle switch
Controls deployment timing based on seat belt fastened or unfastened condition.
Crash zone sensor
Transmits signal to air bag diagnosis sensor unit when a frontal collision occurs.
SRS AIR BAG SYSTEM
SRC-185
< SYSTEM DESCRIPTION >
[FOR MEXICO]
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Satellite sensor (LH/RH)
Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
Combination meter (air bag warning lamp)
Indicates air bag malfunctioning and deployment by blinking and illuminating air bag
warning lamp.
Passenger air bag OFF indicator
Indicates whether or not passenger air bag is in the activation mode based on the
judgement of Occupant Classification System.
Combination switch (spiral cable)
Supplies power supply to driver air bag module on steering wheel.
Component
Function
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