2011 INFINITI QX56 Factory Service Manual

navigation roof rack fuse box cabin filter battery replacement 4WD

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INFINITI QX56 2011 Factory Service Manual
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-c

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
Description".
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 av oid 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
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SYSTEMSBC-9
< SYSTEM DESCRIPTION >
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PRE-CRASH SEAT BELT SYSTEM : Fail SafeINFOID:0000000006237879
When a system malfunction is detected, deactivates a part of the s

SYSTEMSBC-9
< SYSTEM DESCRIPTION >
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PRE-CRASH SEAT BELT SYSTEM : Fail SafeINFOID: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 norma l 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 Deactivate s 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
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SBC-10
< SYSTEM DESCRIPTION >
SYSTEM
SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : System DiagramINFOID:0000000006237880
SEAT BELT WARNING LAMP SYSTEM : System DescriptionINFOID:00000

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INFINITI QX56 2011 Factory Service Manual
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)SBC-11
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (P RE-CRASH SEAT BELT)
CONSULT-III FunctionINFOID:0000000006237882
Diagnosis for

DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)SBC-11
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (P RE-CRASH SEAT BELT)
CONSULT-III FunctionINFOID:0000000006237882
Diagnosis for pre-crash seat belt syst em can be performed using CONSULT-III.
APPLICATION ITEM
SELF-DIAGNOSIS RESULTS
Refer to SBC-16, "DTC Index".
CAUTION:
When malfunctions are detect ed in several systems, includin g CAN communication [U1000], trouble-
shoot CAN communication [U1000].
A malfunction of system may be disp layed 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 syst em 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] condit ion 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] co ndition 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).
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SBC-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (PRE-CRASH SEAT BELT)
WORK SUPPORT
Monitor item Description
DOOR OPENING RETRACT RETRY Changes the number of times for the seat belt retract retry when

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INFINITI QX56 2011 Factory Service Manual
PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)SBC-13
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)
Reference

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INFINITI QX56 2011 Factory Service Manual
SBC-14
< ECU DIAGNOSIS INFORMATION >
PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)
TERMINAL LAYOUT
PHYSICAL VALUES
Fail SafeINFOID:0000000006237884
When a system malfunction is detected, deactivat

Page 4312 of 5598

INFINITI QX56 2011 Factory Service Manual
PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)SBC-15
< ECU DIAGNOSIS INFORMATION >
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*1: The deactivation mode differs depending on the internal malfunctioning conditio

PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)SBC-15
< ECU DIAGNOSIS INFORMATION >
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*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 Deactivate s 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
Revision: 2010 May2011 QX56

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