Content .. 1080 1081 1082 1083 ..

Infiniti G37 Coupe. Manual - part 1082

SBC-36

< SYMPTOM DIAGNOSIS >

PRE-CRASH SEAT BELT SYSTEM

SYMPTOM DIAGNOSIS

PRE-CRASH SEAT BELT SYSTEM

Description

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WARNING:

• The following tests should be performed in a safe, open place that is free of traffic and obstacles.
• The tests should be performed on a dry, paved road. Do not attempt to perform the tests on a wet or

unpaved road, open road, or highway. (This may cause an accident or personal injury.)

• Driver and passenger should assume seat belt will not operate and prepare themselves accordingly.

Tighten driver and passenger seat belts.

Drive at approximately 25 km/h.

Notify passenger of a sudden stop. Driver and passenger prepare themselves for the possibility of system
not operating. Then, driver fully depresses the brake pedal to stop suddenly.

Check that the shoulder of the seat belt is pulled while braking.

Symptom Table

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Symptom

Suspect Systems

Refer to

Pre-crash seat belt system does not oper-
ate. (Neither RH nor LH operate.)

Ignition power supply system inspection

SBC-27

Check motor power supply system

SBC-20

Ground system inspection

SBC-28

CAN communication system inspection

SBC-13

When the above is normal, check connector housing for damage,
looseness and poor connection. Replace pre-crash seat belt control
unit if it is normal.

SBC-40

RH pre-crash seat belt system does not
operate.

Check RH seat belt buckle switch system

SBC-25

Check RH pre-crash seat belt motor system

SBC-14

When the above is normal, check connector housing for damage,
looseness and poor connection. Replace pre-crash seat belt control
unit if it is normal.

SBC-40

LH pre-crash seat belt system does not
operate.

Check LH seat belt buckle switch system

SBC-23

Check LH pre-crash seat belt motor system

SBC-16

When the above is normal, check connector housing for damage,
looseness and poor connection. Replace pre-crash seat belt control
unit if it is normal.

SBC-40

Pre-crash seat belt system does not oper-
ate during emergency brake operation.

CAN communication system inspection

SBC-13

Check brake pedal stroke sensor system

SBC-18

Check brake pedal stroke sensor shield ground system

SBC-22

When the above is normal, check connector housing for damage,
looseness and poor connection. Replace pre-crash seat belt control
unit if it is normal.

SBC-40

PRECAUTIONS

SBC-37

< PRECAUTION >

SBC

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 AIRBAG” and “SEAT BELT” of this
Service Manual.

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 “SRS AIRBAG”.

• 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.

Precaution for Seat Belt Service

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CAUTION:

• Before removing the seat belt pre-tensioner assembly, turn the ignition switch off, disconnect the

both battery cables and wait at least 3 minutes.

• Do not use electrical test equipment for seat belt pre-tensioner connector.
• After replacing or reinstalling seat belt pre-tensioner assembly, or reconnecting front seat belt pre-

tensioner connector, check the system function. Refer to

SRC-15, "Diagnosis Description"

• Do not use disassemble buckle or seat belt assembly.
• Replace anchor bolts if they are deformed or worn out.
• Never oil tongue and buckle.
• If any component of seat belt assembly is questionable, do not repair. Replace the whole seat belt

assembly.

• If webbing is cut, frayed, or damaged, replace seat belt assembly.
• When replacing seat belt assembly, use a genuine NISSAN seat belt assembly.

AFTER A COLLISION

WARNING:

Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the col-
lision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted. Seat belt pre-tensioner
should be replaced even if the seat belts are not in use during a frontal collision in which the air bags
are deployed.
Replace any seat belt assembly (including anchor bolts) if:
• The seat belt was in use at the time of a collision (except for minor collisions and the belts, retractors and

buckles show no damage and continue to operate properly).

• The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide).
• The seat belt attaching point was damaged in an accident. Inspect the seat belt attaching area for damage

or distortion and repair as necessary before installing a new seat belt assembly.

• Anchor bolts are deformed or worn out.
• The seat belt pre-tensioner should be replaced even if the seat belts are not in use during the collision in

which the air bags are deployed.

SBC-38

< PRECAUTION >

PRECAUTIONS

Precaution for Battery Service

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Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

BRAKE PEDAL STROKE SENSOR

SBC-39

< ON-VEHICLE MAINTENANCE >

SBC

ON-VEHICLE MAINTENANCE

BRAKE PEDAL STROKE SENSOR

Exploded View

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Removal and Installation

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REMOVAL

Remove the driver instrument panel (lower). Refer to

IP-12, "Removal and Installation"

Disconnect the brake pedal stroke sensor connector (A).

Remove the screws.

Remove the brake pedal stroke sensor (1).

INSTALLATION

Install in the reverse order of removal.

Brake pedal stroke sensor

Brake pedal stroke sensor connector

JMHIA0100ZZ

Content .. 1080 1081 1082 1083 ..