Nissan Sentra. Manual — part 794
SYSTEM
SRC-11
< SYSTEM DESCRIPTION >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
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
SRC-12
< 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
SRC-13
< SYSTEM DESCRIPTION >
C
D
E
F
G
I
J
K
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M
A
B
SRC
N
O
P
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
SRC-14
< 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-
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
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