Nissan Sentra. Manual - part 794

SYSTEM

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< SYSTEM DESCRIPTION >

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SYSTEM

SRS AIR BAG SYSTEM
SRS AIR BAG SYSTEM : System Diagram

INFOID:0000000009757925

SRS AIR BAG SYSTEM : System Description

INFOID:0000000009757926

• The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or

START position.

• The collision modes for which supplemental restraint systems are activated are different among the SRS

systems. For example, the driver air bag module, front passenger air bag module and front seat belt pre-ten-

sioners are activated in a frontal collision but not in a side collision.

SRS Collision Modes

OCCUPANT CLASSIFICATION SYSTEM

AWHIA0389GB

SRS configuration

Frontal collision

Left side collision

Right side collision

Driver air bag module

x

—

—

Front passenger air bag module

x

—

—

Front LH seat belt pre-tensioner

x

—

—

Front RH seat belt pre-tensioner

x

—

—

Front LH side air bag module

—

x

—

Front RH side air bag module

—

—

x

LH side curtain air bag module

—

x

—

RH side curtain air bag module

—

—

x

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< SYSTEM DESCRIPTION >

SYSTEM

OCCUPANT CLASSIFICATION SYSTEM : System Diagram

INFOID:0000000009757927

OCCUPANT CLASSIFICATION SYSTEM : System Description

INFOID:0000000009757928

The occupant classification system (OCS) identifies different size occupants, out of position occupants, and

detects if a child seat is present in the front passenger seat. The OCS control unit (2) receives inputs from the

occupant classification sensors (1) (located inside the passenger seat cushion assembly). Depending on clas-

sification of the passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis

sensor unit uses this signal and the seat belt buckle switch (passenger seat) signal to determine deployment

or non deployment of the passenger front air bag in the event of a collision. Depending on the signals

received, the air bag diagnosis sensor unit can disable the passenger front air bag completely. The OCS

(weight sensors) must be set to zero point using CONSULT after servicing the OCS system.

NOTE:

• CONSULT can be used to confirm when “zero point reset” for OCS is complete.

• Always perform zero point reset after the removal and installation of the seat or when disconnecting the

OCS control unit harness connector even if zero point reset has been completed in the past.

• If zero point reset is incomplete, the passenger air bag will be disabled and the passenger air bag off indica-

tor will be ON.

• In case of customer concern, CONSULT can be used to confirm the passenger air bag status (readiness).

Passenger Air Bag Status Conditions

NOTE:

AWHIA0390GB

Front Passenger Seat

(Condition)

PASS AIR BAG OFF Indicator

(Status)

Passenger Air Bag Status

(Readiness)

CONSULT Display

Seat occupied

OFF

Active (enabled)

ON

Seat occupied 

NOTE

ON

Deactivated (disabled)

OFF

Seat empty

OFF

Deactivated (disabled)

OFF

SYSTEM

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Passenger does not meet Occupant Classification System specifications for passenger air bag activation.

SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : System Diagram

INFOID:0000000009757929

AWHIA0479ZZ

ALHIA0028GB

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< SYSTEM DESCRIPTION >

SYSTEM

SEAT BELT WARNING LAMP SYSTEM : System Description

INFOID:0000000009757930

The seat belt warning lamp (1) will remind the driver if the driver or

front passenger (US/CAN models) seat belt should be buckled. The

system works in conjunction with the occupant classification system.

Refer to 

SRC-12, "OCCUPANT CLASSIFICATION SYSTEM : Sys-

tem Description"

.

Seat Belt Warning System Operation

AWHIA0481ZZ

Driver seat status
(Ignition switch ON)

Passenger seat status

Seat belt buckle switch 
(driver side) status

Seat belt buckle switch 
(passenger side) status

Seat belt warning lamp

Seat occupied

Seat occupied

Buckled

Buckled

Off

Unbuckled

On

Seat unoccupied

—

Off

—

Unbuckled

On