2011 INFINITI QX56 steering wheel

PRECAUTIONSSB-3
< PRECAUTION >
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5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of a ll control units using CONSULT-III.
Precaution for Seat Belt ServiceINFOID:0000000006217608
CAUTION:
 Before removing the front seat belt pre-tensioner assembly, turn the ignition switch off, disconnect
battery negative terminal and wait at least 3 minutes.
 Never use electrical test equipment for front seat belt pre-tensioner connector.
 After replacing or reinstalling front seat belt pre-tensioner assembly, or reconnecting front seat belt
pre-tensioner connector, check th e system function. Refer to SRC-14, "
Description".
 Never use disassembled buckle or seat belt assembly.
 Replace anchor bolts if th ey are deformed or worn out.
 Never oil tongue and buckle.
 If any component of seat belt assembly is questiona ble, do not repair. Replace the entire seat belt
assembly.
 If webbing is cut, frayed or damaged, replace seat belt assembly.
 When replacing seat belt assembly, u se a genuine NISSAN seat belt assembly.
AFTER A COLLISION
WARNING:
Inspect all seat belt assemblies including retractors and attached hardware after any collision.
NISSAN recommends that all seat belt assemblies in u se during a collision be replaced unless the col-
lision was minor and the belts show no damage a nd continue to operate properly. Failure to do so
could result in serious personal injury in an accide nt. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or im proper operation is noted. Seat belt pre-tensioners
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 front 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.
Revision: 2010 May2011 QX56

SYSTEMSBC-7
< SYSTEM DESCRIPTION >
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SYSTEM
PRE-CRASH SEAT BELT SYSTEM
PRE-CRASH SEAT BELT SYSTEM : System DiagramINFOID:0000000006237877
PRE-CRASH SEAT BELT SYSTEM : System DescriptionINFOID:0000000006237878
 Pre-crash seat belt system integrates control unit and motor in driver and passenger seat belt retractors.
 Provides a sense of ease when pre-crash seat belt c ontrol unit judges the emergency braking operation, the
intelligent brake assistance operating status, the c ontinuous ABS operating status, the emergency steering
wheel operation, the excessive vehicle inclination stat us, or the lateral slippage status during cornering.
The motor immediately retracts the seat belt and suppresses change in occupant posture.
 Even in a situation where a collision is unavoidable, effe cts of other safety devices, like the air bag, are max-
imized and damages are reduced.
 Motor retracts seat belt when unfastening and extrac ts seat belt when fastening to reduce the feeling of
pressure. (comfort function)
FUNCTION DESCRIPTION
Pre-crash seat belt system operat es under the following conditions.
 During emergency brake operation
 When ABS continuously operates
 When intelligent brake assistance operates
 When lateral slippage during cornering occurs
 When steering wheel is rotated for emergency
JMHIA1565GB
Revision: 2010 May2011 QX56

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

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

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 ValueINFOID:0000000006237883
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor item Condition Value/Status
(Approx.)
BUCKLE SW RH RH seat belt is not fastened OFF
RH seat belt is fastened ON
BUCKLE SW LH RH seat belt is not fastened OFF
RH seat belt is fastened ON
VEHICLE DISTANCE Not activated OFF
Activated ON
IGN SW Ignition switch OFF OFF
Ignition switch ON ON
FR DOOR SW RH LH door close CLOSE
LH door open OPEN
FR DOOR SW LH RH door close CLOSE
RH door open OPEN
ABS ACTIVATING ABS is inactive OFF
ABS is active ON
VHCL SPEED While driving Equival ent speedometer reading (km/h)
BRK PEDAL SNSR1 Brake released → depressed (1 V → 4 V)
BRK PEDAL SNSR2 Brake released → depressed (4 V → 1 V)
STRG ANGLE Steering wheel: 0
° (Neutral) ±2.5 (deg)
Steering wheel: 90 ° (Turned right) +90 (deg)
Steering wheel: 90 ° (Turned left) -90 (deg)
STRG ANGLE SPEED Steering wheel: Being turnedDepending on steering acceleration speed
(deg/s)
INCLINATION JDMT Vehicle is level OFF
Vehicle is inclined ON
PRE-TEN ACTIVTN Seat belt pre-tensioner is not activated OFF
Seat belt pre-tensioner is activated ON
HEAT PROTC RH RH heat protection is not activated OFF
RH heat protection is activated ON
HEAT PROTC LH LH heat protection is not activated OFF
LH heat protection is activated ON
Revision: 2010 May2011 QX56

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

PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE)
SBC-17
< ECU DIAGNOSIS INFORMATION >
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PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE)
Reference ValueINFOID:0000000006237886
TERMINAL LAYOUT
PHYSICAL VALUES
Fail SafeINFOID:0000000006237887
 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.
JMHIA0711ZZ
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
1
(Y) Ground Power supply Input — Battery voltage
6
(LG/B) Ground Seat belt buckle switch signal Input Seat belt is fastened 0 V
Seat belt is unfastened 5 V
8
(G) Ground Local Communication Line 2 Input/
Output IGN ON 5 V
9
(–) Ground Shield — — —
16
(W) Ground Local Communication Line 1
Input/
Output ——
18
(B) Ground Ground — — 0 V
19
(W) Ground Motor passenger circuit power supply Input — Battery voltage
20
(B) Ground Motor passenger circuit ground — — 0 V
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
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
Revision: 2010 May2011 QX56

SBC-18
< ECU DIAGNOSIS INFORMATION >
PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE)
*1: The deactivation mode differs depending on the internal malfunctioning condition of control unit
U1000 CAN communication circuit
Stops the operation in the conditions as per the following. *
1
 During emergency brake operation
 When ABS continuo
usly 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
B2452 SEAT BLT MTR AS CIRC Fully deactivates the whole operation.
B2453 BR_STROKE_SEN_CIRC Stops the operation in the conditions as per the following.
 During emergency brake operation
 When ABS continuo
usly operates
B2455 CONTROL UNIT DR Stops the operation in the conditions as per the following. *
1
 During emergency brake operation
 When ABS continuo
usly 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 Fully deactivates the whole operation.
B2457 CONTROL UNIT AS Fully deactivates the whole operation.*
1
B2458 LOCAL COMM
Fully deactivates the whole operation.*1
B2461 VHCL SPEED SIGNALStops the operation in the conditions as per the following.
 During emergency brake operation
 When ABS continuo
usly operates
 When lateral slippage during cornering occurs
 When steering wheel is rotated for emergency
 When the vehicle inclined excessively
 A part or the whole comfort function
B2463 ROLLOVER SIGNAL When the vehicle inclined excessively
B2466 DR/AS CONTROL UNIT Stops the operation in the conditions as per the following.
 During emergency brake operation
 When ABS continuo
usly operates
 When lateral slippage during cornering occurs
 When steering wheel is rotated for emergency
 When the vehicle inclined excessively
 A part or the whole comfort function
B2471 SYS HEAT PROTC AS  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
Display contents of CONSULT-III Fail-safe
Revision: 2010 May2011 QX56