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Nissan Cube. Manual - part 864

SR-2

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

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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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that 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 “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never 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.

Precautions for Removing of Battery Terminal

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• When removing the 12V battery terminal, turn OFF the ignition

switch and wait at least 30 seconds.
NOTE:
ECU may be active for several tens of seconds after the ignition
switch is turned OFF. If the battery terminal is removed before ECU
stops, then a DTC detection error or ECU data corruption may
occur.

• For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be
detected.

• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

Service

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• Never use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3

minutes.

SEF289H

PRECAUTIONS

SR-3

< PRECAUTION >

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, never work on any SRS connectors or wires until at least 3 minutes have
elapsed.

• Diagnosis sensor unit must always be installed with their arrow marks “

⇐

” pointing towards the front of the

vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before installa-
tion and replace as required.

• The spiral cable must be aligned in the neutral position since its rotations are limited. Never turn steering

wheel and column after removal of steering gear.

• Handle air bag module carefully. Always place driver and passenger air bag modules with the pad side fac-

ing upward and seat mounted side air bag module standing with the stud bolt side facing down.

• Conduct self-diagnosis to check entire SRS for proper functioning after replacing any components.
• After air bag inflates, the instrument panel assembly should be replaced if damaged.

SR-4

< PREPARATION >

PREPARATION

PREPARATION

Commercial Service Tools

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Tool name

Description

Tamper resistant TORX bit

Removes driver air bag module and/or Diagnosis
sensor unit

Remover tool

Removes clips, pawls and metal clips

S-NT757

JMKIA3050ZZ

COLLISION DIAGNOSIS

SR-5

< BASIC INSPECTION >

BASIC INSPECTION

COLLISION DIAGNOSIS

FOR FRONTAL COLLISION

FOR FRONTAL COLLISION : When SRS is activated in a collision

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CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

Before performing any of the following steps, ensure that all vehicle body and structural repairs have been
completed.

Replace the diagnosis sensor unit.

Remove the front air bag modules, crash zone sensor, bracket and seat belt pre-tensioner assemblies.

Check the SRS components using the table below:
Replace any SRS components showing visible signs of damage. (dents, cracks and deformation, etc.)

Install new front air bag modules, crash zone sensor assembly, bracket and seat belt pre-tensioner
assemblies.

Perform self-diagnosis using CONSULT or air bag warning lamp. Refer to

SRC-24, "CONSULT Function"

SRC-18, "Diagnosis with Air Bag Warning Lamp"

for details. Ensure entire SRS operates properly.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to

SRC-24, "CONSULT Function"

SRS INSPECTION (FOR FRONTAL COLLISION)

Part

Inspection

Driver air bag module

If the driver air bag has deployed:
REPLACE
Install with new fasteners.

Passenger air bag module (if
equipped)

If the passenger air bag has deployed:
REPLACE
Install with new fasteners.

Crash zone sensor

If any of the front air bags or seat belt pre-tensioners* have been activated:
REPLACE the crash zone sensor and bracket with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Seat belt pre-tensioner assem-
blies
(All applicable locations: buckle,
retractor, lap outer)

If either the driver or passenger seat belt pre-tensioner* has been activated:
REPLACE all seat belt pre-tensioner assemblies with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT only.

Diagnosis sensor unit

If any of the SRS components have been activated:
REPLACE the diagnosis sensor unit.
Install with new fasteners.

Steering wheel

Visually check steering wheel for deformities.

Check harness (built into steering wheel) and connectors for damage, and terminals for defor-
mities.

Install driver air bag module into the steering wheel to check fit and alignment with the wheel.

Check steering wheel for excessive free play.

If no damage is found, reinstall.

If damaged

−

REPLACE.

Spiral cable

If the driver front air bag has deployed:
REPLACE the spiral cable.

Occupant classification system
(Passenger seat)

Remove passenger seat assembly.

Check control unit case for dents, cracks of deformities.

Check connectors and pressure sensor tube for damage, and terminals for deformities.

Check seat frame and cushion pan for dents or deformities.

If no damage is found, reinstall seat with new fasteners.

If damaged

−

REPLACE seat cushion assembly with new fasteners.

Content .. 862 863 864 865 ..