Nissan Cube. Manual - part 873

INSPECTION AND ADJUSTMENT

SRC-9

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

INFOID:0000000009946081

When replacing or removing and installing passenger seat, always perform zero point reset so that Occupant
Detection System is activated normally.

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement

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WORK PROCEDURE WHEN REPLACING CONTROL UNIT

1.

PERFORM ZERO POINT RESET

Perform zero point reset. Refer to 

SRC-9, "ZERO POINT RESET : Special Repair Requirement"

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>>  END

ZERO POINT RESET

ZERO POINT RESET : Description

INFOID:0000000009946083

Zero point reset is an initializing procedure for occupant detection sensor that must be performed when replac-
ing or removing and installing passenger seat.
If zero point reset is not performed, the initialization is incomplete and Occupant Detection System does not
operate normally.
NOTE:
• When replacing passenger seat with a NISSAN genuine part, air bag warning lamp blinks if zero point reset

is incomplete.

• When zero point reset is performed once after removal and installation of passenger seat, CONSULT dis-

plays “complete” and air bag warning does not blink.

• When reinstalling passenger seat after removal, the initial value for occupant detection sensor changes, and

Occupant Detection System does not operate normally.

• Always perform zero point reset after performing the work as per the following. 
- Reinstallation of passenger seat
- Replacement of passenger seat with a seat that is zero point reset complete.

ZERO POINT RESET : Special Repair Requirement

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1.

PERFORM ZERO POINT RESET

1.

Perform zero point reset.
NOTE:
When performing zero point reset, be careful of the items described as per the following.
• Perform zero point reset after installing passenger seat to the vehicle
• Do not put any objects on passenger seat
• Do not apply excessive vibration to the vehicle
• Do not touch the vehicle
• Do not tilt the vehicle

2.

Select start on “Zero point reset function” screen from, WORK SUPPORT of CONSULT “OCCUPANT
DETECTION”.

3.

“Zero point reset” starts. 

>> GO TO 2.

2.

CONFIRMATION OF SETTING

1.

Proceed to “Zero point reset function” screen from work support of CONSULT “OCCUPANT DETEC-
TION”.

2.

Check that “Complete” or “Incomplete” is displayed on “Zero point reset status”.

CAUTION:

SRC-10

< BASIC INSPECTION >

INSPECTION AND ADJUSTMENT

• “Complete” is displayed on “zero point reset current status” if the seat is reinstalled by seat removal

and installation, or “zero point reset” is already performed.

• “Zero point reset current status” displays “Incomplete” if a new seat is installed. When turning key

switch ON without performing zero point reset, air bag warning lamp blinks. When zero point reset is
performed, air bag warning lamp turns OFF.

• Air bag warning lamp blinks in user mode only.
• Air bag sensor unit does not record whether or not zero point reset is performed.

Is condition “ALREADY PERFORMED”?

YES

>> Print out “ZERO POINT RESET CURRENT STATUS” screen, and inspection end.

NO

>>

Check condition as per the following, and perform zero point reset again.

• Passenger seat is occupied by an object.
• Excessive vibration is applied while performing zero point reset.
• Occupant detection system is malfunctioning.

NOTE:
If “Incomplete” is displayed on “zero point reset current status”, zero point reset is not completed
normally. Check the condition as per the following and perform zero point reset again.

• Passenger seat is occupied by an object.
• Excessive vibration is applied while performing zero point reset.
• Occupant detection system is malfunctioning.

SRS AIR BAG SYSTEM

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< SYSTEM DESCRIPTION >

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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 diagnosis sensor unit supplies power supply to air bag module and pre-tensioner seat belt when decel-
eration that is more than the specified limit is detected by G sensor in air bag diagnosis sensor unit, crash
zone sensor, or satellite sensor. Air bag module is composed of electric igniter (squib), filter, pyrotechnic mate-
rial, and gas generating material. When air bag module receives a signal from air bag diagnosis sensor unit,
air bag module ignites pyrotechnic material using electric igniter (squib) so that gas generating material gener-
ates high temperature nitrogen gas. The gas through filter activates air bag. At the same time, pre-tensioner
seat belt receives power supply from air bag diagnosis sensor unit, gasgenerator is activated, and then gas is
generated. Balls in pipe are moved according to generated gas pressure and strike pinion gear on ELR shaft.
ELR shaft rotates and retracts seat belt.

JMHIA1078GB

SRC-12

< SYSTEM DESCRIPTION >

SRS AIR BAG SYSTEM

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.
• Suppresses the deployment of passenger air bag when passenger seat is empty or occupied by child or

child-seat.

• When passenger seat is occupied by child or child seat, turns ON passenger air bag OFF indicator. 
• When judges that passenger seat is occupied by a adult or a child and passenger seat belt is not fasten,

turns ON seat belt warning lamp. Further information for the seat belt warning system, refer to 

SBC-3, "Sys-

tem Description"

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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

SRS configuration

Frontal collision

Left side collision

Right side collision

Driver air bag module. 

×

—

—

Passenger air bag module. 

×

—

—

Seat belt pre-tensioner LH.   

×

—

—

Seat belt pre-tensioner RH. 

×

—

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Side air bag module LH. 

—

×

—

Side air bag module RH. 

—

—

×

Curtain air bag module LH. 

—

×

—

Curtain air bag module RH.

—

—

×