Nissan Qashqai J11. Manual — part 1018
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< SYSTEM DESCRIPTION >
COMPONENT PARTS
PRE-TENSIONER MECHANISM
• In a frontal collision that exceeds the specified limit, air bag sensor
unit detects the collision, transmits an electrical signal to gas gen-
erator
in manifold case, and activates gas generator. Gas is
generated.
• The pressure of the generated gas moves the ball
inside of pipe
. The ball then presses ring gear
which is engaged to the pin-
ion gear
.
• The rotation of the ring gear rotates the shaft
in the retracting
direction of the seat belt. Seat belt is retracted.
LOAD LIMITER (ELR) MECHANISM
• In a collision, when ELR shaft
is locked, a load caused by
impact is applied to webbing
• When a load is continuously applied to webbing and reaches or
exceeds the specified level, a rotating force is applied to ELR shaft
that is engaged to lock portion
and bobbin
. ELR shaft twists.
• As ELR shaft is twisted, webbing is pulled out while keeping a cer-
tain level of tension and easing the impact to the chest of front seat
passenger.
Double pre-tensioner seat belt
INFOID:0000000010513118
DESCRIPTION
The system combines lap pre-tensioner mechanism for lumbar seat belt and pre-tensioner seat belt with load
limiter. The system upgrades passenger restraint by reducing lumbar movement during a frontal collision.
LAP PRE-TENSIONER MECHANISM
• In a frontal collision that exceeds the specified limit, air bag sensor unit detects the collision, transmits an
electrical signal to gas generator
in pipe, and activates gas generator. Gas is generated. The pressure of
the generated gas moves the piston inside of pipe toward pipe front direction, and retracts wire.
• Lap anchor is installed to end of the wire and end of seat belt is connected to lap anchor. The wire therefore
retracts seat belt.
ELR shaft (torsion bar)
Bobbin
Manihold case
Lock portion
Ring gear
Pinion gear
Gas generator
Spring
Ball
Pipe
Pre-tensioner mechanism cross sec-
tion
ELR mechanism portion cross sec-
tion
Pre-tensioner mechanism portion
Load limiter portion
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COMPONENT PARTS
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< SYSTEM DESCRIPTION >
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• When piston stops, clutch mechanism integrated to piston prevents piston from moving in the original direc-
tion. Wire and lap anchor therefore remain in the retracted status.
Spiral cable
INFOID:0000000010513112
• Spiral cable electrically connects air bag diagnosis sensor unit and
driver air bag module. Spiral cable mainly consists of the rotating
portion
which performs the same movement as steering wheel,
the fixed case
which is installed on steering wheel, and the
cable which connects the rotating portion.
• Spiral cable is built into steering angle sensor which is installed to
a space between combination switch and steering wheel.
Crash zone sensor
INFOID:0000000010513113
• Crush zone sensor
is located in front of the radiator. Crash zone
sensor integrates frontal collision “G” sensor which detects frontal
collision impact that exceeds the specified limit of the vehicle.
• In a frontal collision that exceeds the specified limit of the vehicle,
crush zone sensor detects impact. If frontal collision safing sensor
in air bag diagnosis sensor unit judges that impact is due to a colli-
sion, driver air bag, passenger air bag and seat belt pre-tensioner
operate.
Gas generator
Wire
Piston
Pipe
Lap anchor
Seat belt
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< SYSTEM DESCRIPTION >
COMPONENT PARTS
Satellite sensor
INFOID:0000000010513114
• Satellite sensor in installed to center pillar lower portion of front
seat belt retractor front side.
• Satellite sensor integrates lateral collision “G” sensor which
detects lateral collision impact that exceeds the specified limit of
the vehicle. (Lateral collision “G” sensor adopts electronic sensor
of which operating principles are the same as those of frontal colli-
sion “G” sensor in air bag diagnosis sensor unit.)
• In a lateral collision that exceeds the specified limit of the vehicle,
satellite sensor detects impact. If lateral collision safing sensor in
air bag diagnosis sensor unit judges that impact is due to a colli-
sion, side air bag and curtain air bag operate.
Air bag diagnosis sensor unit
INFOID:0000000010513115
• Air bag diagnosis sensor unit
is installed to front seat center por-
tion (under center console). Air bag diagnosis sensor unit inte-
grates control functions of driver air bag, passenger air bag, side
air bag, curtain air bag, and seat belt pre-tensioner.
• Air bag diagnosis sensor unit integrates frontal collision “G” sensor,
frontal collision safing sensor, and lateral collision safing sensor
(only for models with curtain air bag).
• Air bag diagnosis sensor unit has a function that judges impact due
to frontal and lateral collisions exceeding the specified limit of the
vehicle. Air bag diagnosis sensor unit also has an auxiliary power
supply function that supplements battery power supply in the event battery is damaged in a collision.
• Air bag diagnosis sensor unit diagnoses electric system of entire system. Self-diagnosis function is adopted,
which indicates system malfunction by turning ON air bag warning lamp on combination meter when a mal-
function is detected. Diagnosis using CONSULT is possible.
Air bag warning lamp
INFOID:0000000010513116
• Air bag warning lamp turns ON indicating a system malfunction
when a malfunction is detected for electric system of SRS air bag
system and seat belt pre-tensioner system.
• For operation check purposes, air bag warning lamp turns ON for 7
seconds after power switch is turned ON. During this period of
time, air bag diagnosis sensor unit performs system diagnosis.
• Air bag warning lamp indicates self-diagnosis result according to
the number of times it blinks. (in diagnosis mode)
NOTE:
SRS air bag and seat belt pre-tensioner do not operate for approx-
imately 7 seconds (air bag warning lamp is turning ON or blinking)
after power switch is turned ON.
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COMPONENT PARTS
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< SYSTEM DESCRIPTION >
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Front Passenger Air Bag Off Indicator
INFOID:0000000010435464
Front passenger air bag OFF indicator turns ON when turning air
bag cutoff switch OFF position.
Front Passenger Air Bag On Indicator
INFOID:0000000010435465
Front passenger air bag ON indicator turns ON when turning air bag
cutoff switch ON position.
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