Nissan Leaf. Manual — part 1046
COMPONENT PARTS
SB-9
< SYSTEM DESCRIPTION >
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• In a frontal collision that exceeds the specified limit, air bag sensor
unit detects the collision, transmits an electrical signal to gas gen-
erator (3) in manifold case, and activates gas generator. Gas is
generated.
• The pressure of the generated gas moves the ball (4) inside of
pipe (6). The ball then presses ring gear (2) which is engaged to
the pinion gear (1).
• The rotation of the ring gear rotates the shaft (5) in the retracting
direction of the seat belt. Seat belt is retracted.
LOAD LIMITER (ELR) MECHANISM
• In a collision, when ELR shaft (2) is locked, a load caused by
impact is applied to webbing (1)
• 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 (4) and bobbin (3). 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:0000000010119332
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 (1) 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.
• 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.
JMHIA0168ZZ
JMHIA0169ZZ
1.
Gas generator
2.
Wire
3.
Piston
4.
Pipe
5.
Lap anchor
6.
Seat belt
PHIA1226J
SB-10
< REMOVAL AND INSTALLATION >
FRONT SEAT BELT
REMOVAL AND INSTALLATION
FRONT SEAT BELT
Exploded View
INFOID:0000000010119333
AWHIA0518ZZ
FRONT SEAT BELT
SB-11
< REMOVAL AND INSTALLATION >
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SEAT BELT RETRACTOR
SEAT BELT RETRACTOR : Removal and Installation
INFOID:0000000010119334
REMOVAL
WARNING:
Before servicing, push power switch OFF, disconnect 12V battery negative terminal and wait 5 min-
utes or more. Refer to
SB-2, "Precaution for Removing 12V Battery"
Driver side
1. Remove shoulder anchor.
1. Slide driver seat to the frontmost position.
2. Pull adjuster cover in direction indicated by arrows as
shown in the figure. Remove adjuster cover.
3. Remove shoulder anchor mounting anchor bolt.
2. Remove lap pre-tensioner.
1. Remove front kicking plate inner and rear kicking plate inner.
Refer to
INT-28, "KICKING PLATE INNER : Removal and Installation"
.
2. Remove center pillar lower garnish.
Refer to
INT-30, "CENTER PILLAR LOWER GARNISH : Removal and Installation"
3. Remove driver seat from the vehicle.
Refer to
SE-29, "Removal and Installation"
.
CAUTION:
When removing and installing, use shop cloths to protect parts from damage.
4. Lift up lap pre-tensioner seat belt garnish, disengage pawls,
and remove lap pre-tensioner seat belt garnish.
1.
Adjuster cover
2.
Anchor bolt
3.
Shoulder anchor
4.
Spacer
5.
Retaining washer
6.
Seat belt adjuster
7.
Fiber washer
8.
Seat belt pre-tensioner retractor
(Passenger side)
9.
Seat belt pre-tensioner retractor
(Driver side)
10. Outer anchor
11. Joint bracket assembly RH
12. Seat belt buckle
13. Seat belt buckle nut
14. Lap pre-tensioner
15. Joint bracket assembly LH
16. Lap pre-tensioner seat belt garnish
: Pawl
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
: Pawl
JMHIA1630ZZ
: Pawl
JMHIA1631ZZ
SB-12
< REMOVAL AND INSTALLATION >
FRONT SEAT BELT
5. Pull up floor carpet.
6. Remove front floor spacer and rear floor spacer.
7. Disconnect lap pre-tensioner seat belt harness connector.
CAUTION:
• For installing/removing lap pre-tensioner connector,
insert thin screwdriver wrapped in tape into notch, lift
lock and remove connector.
• Install connector with lock raised, and push lock into
connector.
• After installing the connector, check that the lock is
pushed securely into it.
8. Remove joint bracket assembly LH mounting bolts (A).
9. Remove mounting anchor bolt of lap pre-tensioner, and then remove lap pre-tensioner from joint
bracket assembly LH.
3. Remove seat belt pre-tensioner retractor.
1. Remove seat belt pre-tensioner retractor mounting anchor bolt and screw.
2. Disconnect seat belt pre-tensioner harness connector.
CAUTION:
• For installing/removing seat belt pre-tensioner con-
nector, insert thin screwdriver wrapped in tape into
notch, lift lock and remove connector.
• Install connector with lock raised, and push lock into
connector.
• After installing the connector, check that the lock is
pushed securely into it.
• Never place pre-tensioner seat belt in an area where the temperature reaches 80
°C or more.
4. Remove seat belt adjuster.
1. Remove center pillar upper garnish.
INT-31, "CENTER PILLAR UPPER GARNISH : Removal and Installation"
.
2. Remove seat belt adjuster mounting anchor bolts.
Passenger side
1. Remove shoulder anchor.
1. Slide passenger seat to the frontmost position.
PHIA0953J
Vehicle front
JMHIA1801ZZ
PHIA0953J
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