Infiniti Q45. Manual - part 783

PRE-CRASH SEAT BELT

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PRE-CRASH SEAT BELT

PFP:98845

Component Parts and Harness Connector Location

NHS0003L

System Description

NHS0003M

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Pre-crash seat belt system is adapted to front seat belts RH/LH.

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When the pre-crash seat belt control unit judges the emergency braking operation, it gives the sense of
security by the motor built into the pre-crash seat belt retracting the shoulder belt and suppressing the
crew's posture change. Also, it eases the damage of the collision.

PHIA0761E

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PRE-CRASH SEAT BELT

FUNCTION DESCRIPTION
Operation condition

Pre-crash seat belt operates under the following conditions.

Operation prohibition condition

If operation condition is satisfied, pre-crash seat belt does not operate under the following conditions.

*

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 :When pre-crash seat belt doesn't operate after it continuously operates 3 times or more, operation can be performed again by stop-

ping operation for approximately 7 minutes.

*

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 : Refer to 

SB-12, "FAIL-SAFE MODE"

  for details of fail-safe mode.

FAIL-SAFE MODE

When a malfunction occurs in the following system, the pre-crash seat belt function is controlled according to
the malfunctioning parts.
Also, seat belt warning lamp blinks with fastening driver seat belt when the following malfunction occurs.

Seat Belt Warning Lamp Illumination Pattern 

Condition

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When the brake pedal is depressed more than a certain extent

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When operation prohibition condition is not satisfied

Condition

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When seat belt is not fastened (Only the seat belt that is not fastened does not operate.)

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When vehicle is moving backwards

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When the vehicle speed is 15 km/h (9 MPH) or less

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When pre-crash seat belt continuously operates 3 times or more *

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At fail-safe condition *

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Malfunctioning parts

Control contents

Brake pedal stroke sensor system malfunction

Pre-crash seat belt RH/LH do not activate when emergency brake operates.

Seat belt motor RH malfunction

Pre-crash seat belt RH does not activate.

Seat belt motor LH malfunction

Pre-crash seat belt LH does not activate.

Motor power supply circuit malfunction

Pre-crash seat belt RH/LH do not activate.

PHIA0790E

PRE-CRASH SEAT BELT

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CAN Communication System Description

NHS0003N

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit

NHS0003O

Refer to 

LAN-40, "CAN Communication Unit"

 . 

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PRE-CRASH SEAT BELT

Schematic

NHS0003P

THWM0063E