Nissan Sentra Service Manual: System
SRS air bag system
SRS AIR BAG SYSTEM : System Diagram
SRS AIR BAG SYSTEM : System Description
- 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-tensioners are activated in a frontal collision but not in a side collision.
SRS Collision Modes
Occupant classification system
OCCUPANT CLASSIFICATION SYSTEM : System Diagram
OCCUPANT CLASSIFICATION SYSTEM : System Description
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 classification 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 indicator 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:
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
SEAT BELT WARNING LAMP SYSTEM : System Description
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 : System Description".
Seat Belt Warning System Operation
Component parts
Component Parts Location
Driver air bag module
Front passenger air bag off indicator
Front passenger air bag module
Front LH side air bag module
(RH similar)
LH side curtain air bag ...
Diagnosis system (AIR BAG)
Description
CAUTION:
Never use electrical test equipment on any circuit related to the
SRS unless instructed in this Service
Manual. SRS wiring harnesses can be identified by yellow and/or o ...
Other materials:
Washer nozzle & tube
Exploded view
Check valve
Washer tube
Washer tank
Washer pump
Washer nozzle
Clip
Washer nozzle
Washer nozzle : removal and installation
REMOVAL
Disconnect the washer nozzle from the hood by pushing on the
nozzle in the order and direction shown.
Disconnect the ...
Battery
Exploded view
Battery frame
Battery rods
Battery cover
Battery bracket
Battery tray
Battery
Front
Removal and installation (battery)
Removal
Loosen the battery terminal nuts and disconnect both battery negative
and positive terminals.
Caution:
To prevent damage to t ...
Ignition switch (if so equipped)
WARNING
Never remove or turn the key to the
LOCK position while driving. The steering
wheel will lock (for models with a
steering lock mechanism). This may
cause the driver to lose control of the
vehicle and could result in serious vehicle
damage or personal injury ...
