Nissan Sentra Service Manual: Component parts

Component Parts Location

1. Driver air bag module
2. Front passenger air bag off indicator
3. Front passenger air bag module
4. Front LH side air bag module (RH similar)
5. LH side curtain air bag module (view with headliner removed) (RH similar)
6. Front LH seatbelt pre-tensioner (view with lower center pillar cover LH removed) (RH similar)
7. Occupant classification system control unit (A) Occupant classification system sensors (B) (view with front passenger seat removed)
8. Crash zone sensor (view with air intake removed)
9. Front door satellite sensor LH (view with front door finisher LH removed) (RH similar)
10. Front side air bag satellite sensor LH (view with lower center pillar cover LH removed) (RH similar)
11. Rear side air bag satellite sensor LH (view with dash side lower finisher LH removed) (RH similar)
12. Seat belt buckle switch (driver seat) (passenger seat similar)
13. Spiral cable (view with steering wheel removed)
14. Air bag diagnosis sensor unit (view with center console assembly removed)

Component Description

Driver Air Bag Module

The driver air bag module is dual stage and located in the steering wheel assembly. It operates with the SRS system in a frontal collision exceeding a specified level.

Front Passenger Air Bag Module

The front passenger air bag module is dual stage and is located behind the instrument panel assembly. It operates with the SRS system in a frontal collision exceeding a specified level. Refer to SRC- 11, "SRS AIR BAG SYSTEM : System Description" for more information.

Front Side Air Bag Module

Front side air bag modules are built into the front seatback assemblies.

Vehicles with side air bags are equipped with labels as shown.

Side Curtain Air Bag Module

Side curtain air bag modules are located above the vehicle headlining.

Vehicles with side curtain air bags are equipped with labels on the pillar upper finishers.

Front Seat Belt Pre-tensioner

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 shoulder belt pre-tensioner (1) as well as the lap belt pre-tensioner (2). 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

The air bag diagnosis sensor unit is located under the center console assembly. The air bag diagnosis sensor unit receives signals from multiple 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 selfdiagnosis capability through the use of the CONSULT as well as flash codes displayed by the air bag warning lamp.

Crash Zone Sensor

The crash zone sensor is located infront of the radiator. 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.

Front Side Air Bag Satellite Sensor

The front side air bag satellite sensors are located on the front center pillar LH and RH next to the seat belt pretensioners. The front side air bag satellite sensors send signals to the air bag diagnosis sensor unit during a side collision. These sensors may be identified by yellow connectors.

Rear Side Air Bag Satellite Sensor

The rear side air bag satellite sensors are located behind the dash side lower finisher LH and RH. The rear side air bag satellite sensors send signals to the air bag diagnosis sensor unit during a side collision.

These sensors may be identified by yellow connectors.

Front Door Satellite Sensor

The front door satellite sensors are located in the driver and passenger doors. The sensors detect sudden pressure changes inside the door cavity and then send signals to the air bag diagnosis sensor unit during a side collision. These sensors may be identified by yellow connectors.

SRS Component Connectors

DIRECT CONNECT

The following SRS components use direct-connect style harness connectors.

• Driver front air bag module
• Passenger front air bag module
• LH side curtain air bag module
• RH side curtain air bag module
• Front LH seat belt pre-tensioner
• Front RH seat belt pre-tensioner

Always pull up to release locking tab prior to removing connector from SRS component.

Always push down to lock locking tab after installing connector to SRS component. When locked, the locking tab is level with the connector housing.

SLIDE DOUBLE LOCKING

• A new style slide double locking type connector is used on certain systems and components, especially those related to airbag control systems.
• The slide double locking type connectors help prevent incomplete locking and accidental looseness or disconnection.
• The slide double locking type connectors are disconnected by pushing or pulling the slider. Refer to the figure below.

CAUTION:

• Do not pull the harness or wires when disconnecting the connector.

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