Nissan X-Trail 32. Manual - part 1949

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< SYSTEM DESCRIPTION >

COMPONENT PARTS

INFLATOR : Side air bag inflator

INFOID:0000000010927713

• Side air bag inflator 

 mainly consists of electric ignition device

(squib), heating agent, compressed gas, filter, and diffuser. These
items are stored in a cylinder-type container.

• In a lateral collision which exceeds the specified limit of the vehi-

cle, electric ignition device (squib) ignites igniting agent. Gas gen-
erating agent burns due to heat from igniting agent. Generated gas
(high temperature) inflates air bag through filter.
NOTE:
Filter removes and cools residues of gas generating agent.

INFLATOR : Curtain air bag inflator

INFOID:0000000010927714

• Curtain air bag inflator 

 mainly consists of electric ignition device

(squib), heating agent, compressed gas, and diffuser. These items
are stored in a cylinder-type container.

• In a lateral collision which exceeds the specified limit of the vehi-

cle, electric ignition device (squib) ignites igniting agent. Gas gen-
erating agent burns due to heat from igniting agent. Generated gas
(high temperature) inflates air bag 

 through filter.

NOTE:
Filter removes and cools residues of gas generating agent.

MAIN COMPONENT PARTS AND FUNCTIONS

MAIN COMPONENT PARTS AND FUNCTIONS : Spiral cable

INFOID:0000000010927715

• 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.

MAIN COMPONENT PARTS AND FUNCTIONS : Crash zone sensor

INFOID:0000000010927716

• Crush zone sensor 

 is installed to charge port lid hinge assem-

bly. 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
(front and rear) operate.

MAIN COMPONENT PARTS AND FUNCTIONS : Satellite sensor

INFOID:0000000010927717

• B-pillar satellite sensor 

 in installed to center pillar lower portion of front seat belt retractor front side.

JMHIA1600ZZ

JMHIA2869ZZ

JMHIA2870ZZ

JMHIA2871ZZ

COMPONENT PARTS

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< SYSTEM DESCRIPTION >

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• C-pillar satellite sensor 

 in installed to luggage side lower finisher remove portion of the C-pillar.

• 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 princi-
ples are the same as those of frontal collision “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 collision, side air bag,
curtain air bag and front seat belt pre-tensioner operate.

MAIN COMPONENT PARTS AND FUNCTIONS : Air bag diagnosis sensor unit

INFOID:0000000010927718

• 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.

• 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 air bag system. Self-diagnosis function is

adopted, which indicates system malfunction by turning ON or blinking air bag warning lamp on combination
meter when a malfunction is detected. Diagnosis using CONSULT is possible.

: Vehicle front

JMHIA2872ZZ

: Vehicle front

JMHIA2873ZZ

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< SYSTEM DESCRIPTION >

COMPONENT PARTS

MAIN COMPONENT PARTS AND FUNCTIONS : Air bag warning lamp

INFOID:0000000010927719

• Air bag warning lamp turns ON or blinks indicating a system mal-

function 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.
NOTE:
SRS air bag and seat belt pre-tensioner do not operate for approx-
imately 7 seconds (air bag warning lamp is turning ON) after power
switch is turned ON.

BF-1845D

COLLISION DIAGNOSIS

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< BASIC INSPECTION >

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BASIC INSPECTION

COLLISION DIAGNOSIS

FOR FRONTAL COLLISION

FOR FRONTAL COLLISION : When SRS is activated in a collision

INFOID:0000000010927720

CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

1.

Before performing any of the following steps, ensure that all vehicle body and structural repairs have been
completed.

2.

Replace the diagnosis sensor unit.

3.

Remove the front air bag modules, crash zone sensor, bracket and seat belt pre-tensioner assemblies.

4.

Check the SRS components using the table below:
Replace any SRS components showing visible signs of damage. (dents, cracks and deformation, etc.)

5.

Install new front air bag modules, crash zone sensor assembly, bracket and seat belt pre-tensioner
assemblies.

6.

After the work is completed, check that no system malfunction is detected by air bag warning lamp.

SRS INSPECTION (FOR FRONTAL COLLISION)

Part

Inspection

Driver air bag module

If the driver air bag has deployed:
REPLACE
Install with new fasteners.

Front passenger air bag module
(if equipped)

If the front passenger air bag has deployed:
REPLACE
Install with new fasteners.

Crash zone sensor

If any of the front air bags or seat belt pre-tensioners* have been activated:
REPLACE the crash zone sensor and bracket with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Seat belt pre-tensioner assem-
blies
(All applicable locations: buckle, 
retractor, lap outer)

If either the driver or passenger seat belt pre-tensioner* has been activated:
REPLACE all seat belt pre-tensioner assemblies with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Diagnosis sensor unit

If any of the SRS components have been activated:
REPLACE the diagnosis sensor unit.
Install with new fasteners.

Steering wheel

1.

Visually check steering wheel for deformities.

2.

Check harness (built into steering wheel) and connectors for damage, and terminals for defor-
mities.

3.

Install driver air bag module into the steering wheel to check fit and alignment with the wheel.

4.

Check steering wheel for excessive free play.

5.

If no damage is found, reinstall.

6.

If damaged 

−

 REPLACE.

Spiral cable

If the driver front air bag has deployed:
REPLACE the spiral cable.

Occupant classification system 
(Passenger seat)

1.

Remove passenger seat assembly.

2.

Check control unit case for dents, cracks of deformities.

3.

Check connectors and pressure sensor tube for damage, and terminals for deformities.

4.

Check seat frame and cushion pan for dents or deformities.

5.

If no damage is found, reinstall seat with new fasteners.

6.

If damaged 

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 REPLACE seat cushion assembly with new fasteners.