Nissan Versa Sedan. Manual — part 727
PRECAUTIONS
SRC-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009269102
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the
battery and wait at least 3 minutes before performing any service.
Precaution for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service
INFOID:0000000009269103
• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min-
utes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-
tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have
passed.
• The air bag diagnosis sensor unit must always be installed with the arrow mark “
⇐” pointing toward the front
of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or rust
before installation and replace as required.
• The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.
• Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side
facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.
• Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
• After air bag inflates, the front instrument panel assembly should be replaced if damaged.
SRC-4
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000009269104
Component Description
INFOID:0000000009269105
1.
Crash zone sensor
2.
Front door satellite sensor LH
3.
Spiral cable
4.
Front passenger air bag off indicator
5.
Front LH seatbelt pre-tensioner
Side air bag satellite sensor LH
6.
Air bag diagnosis sensor unit
7.
Front LH side air bag module
8.
Seat belt buckle switch (LH)
Seat belt buckle switch (RH)
9.
Occupant classification system control
unit and sensors
10. Front RH seatbelt pre-tensioner
Side air bag satellite sensor RH
11. Front RH side air bag module
12. RH side curtain air bag module
13. Front door satellite sensor RH
14. LH side curtain air bag module
15. Front passenger air bag module
16. Driver air bag module
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Component
Function
Air bag diagnosis sensor unit
Refer to
SRC-6, "Air Bag Diagnosis Sensor Unit"
.
Driver air bag module
SRC-5, "Driver Air Bag Module"
.
Front passenger air bag module
Refer to
SRC-5, "Front Passenger Air Bag Module"
Front side air bag module
Refer to
SRC-5, "Front Side Air Bag Module"
.
Side curtain air bag module
SRC-5, "Side Curtain Air Bag Module"
.
Front seat belt pre-tensioner
SRC-6, "Front Seat Belt Pre-tensioner"
Occupant classification system
Refer to
SRC-10, "OCCUPANT CLASSIFICATION SYSTEM : System Description"
.
Crash zone sensor
Refer to
.
Side air bag (satellite) sensor
SRC-7, "Side Air Bag Satellite Sensor"
.
COMPONENT PARTS
SRC-5
< SYSTEM DESCRIPTION >
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Driver Air Bag Module
INFOID:0000000009269106
The driver air bag module is dual stage and located in the steering
wheel assembly. It operates with the SRS system in a frontal colli-
sion exceeding a specified level.
Front Passenger Air Bag Module
INFOID:0000000009269107
The front passenger air bag module is located behind the instrument
panel assembly. It operates with the SRS system in a frontal collision
exceeding a specified level. Refer to
SIFICATION SYSTEM : System Description"
Front Side Air Bag Module
INFOID:0000000009269108
Front side air bag modules are built into the front seatback assem-
blies. Vehicles with side air bags are equipped with labels as shown.
Side Curtain Air Bag Module
INFOID:0000000009269109
Side curtain air bag modules are located above the vehicle headlining.
Front door (satellite) sensor
Refer to
SRC-7, "Door Satellite Sensor"
.
Seat belt buckle switch
The seat belt buckle switches (LH/RH) provide the seat belt buckle signals to the air bag diagnosis
sensor unit and the combination meter.
Spiral cable
The spiral cable provides a rotating physical connection to the driver air bag module.
Combination meter
The combination meter displays the air bag warning lamp and the seat belt warning lamp. The air
bag warning lamp is used for diagnosis in User Mode and may be used to display diagnostic trou-
ble codes without the use of the CONSULT.
Component
Function
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SRC-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Vehicles with side curtain air bags are equipped with labels on the
center pillar upper finisher as shown.
Front Seat Belt Pre-tensioner
INFOID:0000000009269110
The seat belt pre-tensioner system with load limiter is installed for
both the driver's seat and the front passenger's seat. It operates
simultaneously with the SRS air bag system in the event of a frontal
collision with an impact exceeding a specified level.
When the frontal collision with an impact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the pre-tensioner. Vehicle passengers are
securely restrained.
When passengers in a vehicle are thrown forward in a collision and
the restraining force of the seat belt exceeds a specified level, the
load limiter permits the specified extension of the seat belt by the
twisting of the ELR shaft, and a relaxation of the chest-area seat belt
web tension while maintaining force.
Air Bag Diagnosis Sensor Unit
INFOID:0000000009269111
The air bag diagnosis sensor unit is located under the center con-
sole. The air bag diagnosis sensor unit receives signals from multi-
ple SRS sensors and controls the deployment of the air bags. The
deployment of the air bags depends on the type and severity of the
collision. The air bag diagnosis sensor unit has self-diagnosis capa-
bility through the use of the CONSULT as well as flash codes dis-
played by the air bag warning lamp.
Crash Zone Sensor
INFOID:0000000009269112
The crash zone sensor is located behind the front grille in front of the
radiator support. The crash zone sensor sends signals to the air bag
diagnosis sensor unit during a frontal collision. This sensor may be
identified by a yellow connector.
WHIA0041E
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