Infiniti QX56 (Z62). Manual — part 1077
SBC-8
< SYSTEM DESCRIPTION >
SYSTEM
• When the vehicle inclined excessively
• When comfort function operates
OPERATION CONDITION
Operation while driving
• Operation start and stop conditions of pre-crash seat belt system are as shown in the following table.
• The activation and deactivation conditions of pre-crush seat belt are as per the following.
NOTE:
For details of intelligent brake assist system.Refer to
BRC-152, "INTELLIGENT BRAKE ASSIST : System
.
Comfort function
• Seat belt is retracted and the looseness is reduced in the state as shown in the following table.
• Operation start and stop conditions of pre-crash seat belt system are as shown in the following table.
Operation Prohibition Condition
Pre-crash seat belt system does not operate in the following conditions.
• When seat belt is not fastened (only the seat belt that is not fastened does not operate)
• When motor is overheat due to contentious operation*1
• When the system is in fail-safe mode
*1: System operation is temporarily deactivated to avoid overheating, when comfort function is continuously
operated (18 times or more) during a short period of time by fastening and unfastening seat belts or opening
and closing doors.
MALFUNCTION WARNING
When system malfunction is detected, comfort function is deactivated to warn customer of system malfunc-
tion.
Operation item
Operation start condition
Operation stop condition
During emergency brake operation
• Vehicle speed is 15 km/h (9 MPH) or more
• Emergency braking status is detected
• During acceleration
• When stopped
When ABS continuously operates
• ABS continuously operates for 2 seconds or
more
• Brake pedal is in depressed state
When intelligent brake assistance oper-
ates
System detects that intelligent brake assistance is
in operating status
2 seconds after operation start
When lateral slippage during cornering
occurs
• Vehicle speed is 30 km/h (19 MPH) or more
• System detects that the vehicle is in lateral slip-
page state
• System detects that the vehicle is driving on a
curve
• Vehicle stopped
• 1 second or more after maintaining
steering wheel angle in straight driv-
ing state
When steering wheel is rotated for emer-
gency
• Vehicle speed is 60 km/h (36 MPH) or more
• Steering wheel angle is 90 degrees or more
• System detects that steering wheel is rotated for
emergency
When the vehicle inclined excessively
• Vehicle speed is 30 km/h (19 MPH) or more
• System detects that the vehicle inclined exces-
sively
• During acceleration
• Vehicle stopped
Operation item
Activating condition
Deactivating condition
Door open
• Seat belt is in not fastened state
• Door is operated to open from closed
• Vehicle stopped
• Seat belt retract is complete
• 13 seconds after start retracting
Seat belt is fastened
• When door is closed
• Seat belt is fastened
• Seat belt is unfastened
• 1 second after operation
Seat belt is release
Seat belt is unfastened
• Seat belt retract is complete
• 10 seconds after start retracting
SYSTEM
SBC-9
< SYSTEM DESCRIPTION >
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PRE-CRASH SEAT BELT SYSTEM : Fail Safe
INFOID:0000000006237879
• When a system malfunction is detected, deactivates a part of the system or all functions depending on the
malfunctioning part.
• When the malfunction condition recovers to the normal condition, the system returns to the normal opera-
tion.
*
1
: The deactivation mode differs depending on the internal malfunctioning condition of control unit
Display contents of CONSULT-III
Fail-safe
U0126
STRG ANG SEN SIG
Stops the operation in the conditions as per the following.
• When lateral slippage during cornering occurs
• When steering wheel is rotated for emergency
• A part of comfort function
U0428
STRG ANGL CAL
Stops the operation in the conditions as per the following.
• When lateral slippage during cornering occurs
• When steering wheel is rotated for emergency
• A part of comfort function
U1000
CAN communication circuit
Stops the operation in the conditions as per the following. *
1
• During emergency brake operation
• When ABS continuously operates
• When lateral slippage during cornering occurs
• When Intelligent brake assistance operates
• When steering wheel is rotated for emergency
• When the vehicle inclined excessively
• A part or the whole comfort function
B2451
SEAT BLT MTR DR CIRC
Fully deactivates the whole operation.
B2452
SEAT BLT MTR AS CIRC
Deactivates a part of comfort function.
B2453
BR_STROKE_SEN_CIRC
Stops the operation in the conditions as per the following.
• During emergency brake operation
• When ABS continuously operates
• A part of comfort function
B2454
SEAT BLT PWR DR CIRC
Fully deactivates the whole operation.
B2455
CONTROL UNIT DR
Stops the operation in the conditions as per the following. *
1
• During emergency brake operation
• When ABS continuously operates
• When lateral slippage during cornering occurs
• When Intelligent brake assistance operates
• When steering wheel is rotated for emergency
• When the vehicle inclined excessively
• A part or the whole comfort function
B2456
SEAT BLT PWR AS
Deactivates a part of comfort function.
B2457
CONTROL UNIT AS
Deactivates a part of comfort function.
B2458
LOCAL COMM
Deactivates a part of comfort function.
B2461
VHCL SPEED SIGNAL
Stops the operation in the conditions as per the following.
• During emergency brake operation
• When ABS continuously operates
• When lateral slippage during cornering occurs
• When steering wheel is rotated for emergency
• When the vehicle inclined excessively
• When comfort function operates
B2463
ROLLOVER SIGNAL
Stops the operation in the conditions as per the following.
• When the vehicle inclined excessively
• A part or the whole comfort function
B2466
DR/AS CONTROL UNIT
Deactivates a part of comfort function.
B2470
SYS HEAT PROTC DR
• Fully deactivates the whole operation.
• Operation return
- 1 time operation becomes possible after approximately 30 seconds
- Returns to the initial condition after approximately 8 minutes
SBC-10
< SYSTEM DESCRIPTION >
SYSTEM
SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : System Diagram
INFOID:0000000006237880
SEAT BELT WARNING LAMP SYSTEM : System Description
INFOID:0000000006237881
• Turns ON seat belt warning lamp, when the Occupant Detection System judges adult or child in the front
passenger seat and the passenger seat belt buckle switch is OFF.
• Operation of air bag diagnosis sensor unit when air bag diagnosis sensor unit receives information from
Occupant Detection System.
• In addition, seat belt warning lamp illuminates, when the driver side seat belt is not fasten. This does not
relate to the air bag diagnosis sensor unit.
• For driver seat belt function, refer to
MWI-16, "MASTER WARNING LAMP : System Diagram"
JMHIA0685GB
Status (front passenger seat)
Seat belt warning lamp (When front passenger seat is unbuck-
led)
Empty
OFF
An object
OFF
Child/ child-seat
ON
Adult
ON
Malfunction
OFF
Zero point reset
Not yet performed (service parts only)
OFF
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
SBC-11
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
CONSULT-III Function
INFOID:0000000006237882
Diagnosis for pre-crash seat belt system can be performed using CONSULT-III.
APPLICATION ITEM
SELF-DIAGNOSIS RESULTS
.
CAUTION:
When malfunctions are detected in several systems, including CAN communication [U1000], trouble-
shoot CAN communication [U1000].
A malfunction of system may be displayed when battery voltage is low (when 7 to 8 V is continued for
approximately 2 seconds) even though the system is not malfunctioning. Erase DTC memory and
never replace any parts after making sure that the system is normal, especially if the malfunctions are
displayed after replacing battery.
ERASING SELF-DIAGNOSIS RESULTS
• SELF-DIAGNOSIS RESULTS
Current “SELF-DIAG RESULTS” are displayed. (If all suspect circuits have been repaired, “NO DTC” is dis-
played.)
DATA MONITOR
Part to be diagnosed
Diagnosis Mode
Function description
Pre-crash seat belt
Self-diagnosis Results
• Displays data recorded when a malfunction is de-
tected.
• Erases DTC recorded in memory.
Data Monitor
Displays input data for pre-crash seat belt control
unit in real time.
Work Support
Changes the setting for each system function.
CAN DIAG SUPPORT MNTR
Monitors communication status of CAN communi-
cation.
Ecu Identification
Displays pre-crash seat belt control unit part num-
ber.
Monitor item
Contents
BUCKLE SW RH
Indicates [ON/OFF] condition of seat belt buckle switch (RH).
BUCKLE SW LH
Indicates [ON/OFF] condition of seat belt buckle switch (LH).
VEHICLE DISTANCE
Indicates [ON/OFF] condition of intelligent brake assist signal.
IGN SW
Indicates [ON/OFF] condition of ignition switch.
FR DOOR SW RH
Indicates [Close/Open] condition of front door switch (RH).
FR DOOR SW LH
Indicates [Close/Open] condition of front door switch (LH).
ABS ACTIVATING
Indicates [ON/OFF] condition of ABS operation signal.
VHCL SPEED
Indicates [Km/h] vehicle speed signal.
BRK PEDAL SNSR1
Indicates [V] voltage of brake pedal stroke sensor 1 signal.
BRK PEDAL SNSR2
Indicates [V] voltage of brake pedal stroke sensor 2 signal.
STRG ANGLE
Indicates [deg] steering angle signal.
STRG ANGLE SPEED
Indicates [deg/s] steering angle speed signal.
INCLINATION JDMT
Indicates [ON/OFF] condition of pre roll over signal.
PRE-TEN ACTIVTN
Indicates [ON/OFF] condition of pre-tensioner operated signal.
HEAT PROTC RH
Indicates [ON/OFF] condition of heat protection (RH).
HEAT PROTC LH
Indicates [ON/OFF] condition of heat protection (LH).
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