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.

Refer to 

INT-31, "CENTER PILLAR UPPER GARNISH : Removal and Installation"

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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