2011 INFINITI QX56 Factory Service Manual

bulb low oil pressure fuse box location tow bar brake pads fog light

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INFINITI QX56 2011 Factory Service Manual
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SYSTEM
SYSTEM
System DescriptionINFOID:0000000006223500
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPU
T/OUTPUT SIGNAL ITEM
Input Signal Item
JSOIA0273GB
Revision: 2010 May2

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Output Signal Item
Transmit unit Signal name Description
ECM CAN com-
munica-
tionClosed throttle position signal Receives

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Output Signal Item
Transmit unit Signal name Description
ECM CAN com-
munica-
tionClosed throttle position signal Receives idle position state (ON/OFF)
Accelerator pedal position signal Receives accelerator pedal position (angle)
ICC steering switch
signal
Dynamic driver as-
sistance switch sig-
nal Receives the operational state of the ICC steering
switch
Engine speed signal Receives engine speed
Stop lamp switch signal Receives an operational state of the brake pedal
Snow mode signal Receives an operational state of the snow mode
TCM CAN com-
munica-
tionInput speed signal Receives the number of revolutions of input shaft
Current gear position signal Receives a current gear position
Shift position signal Receives a selector lever position
Output shaft revolution signal Receives the number of revolutions of output shaft
ABS actuator
and electric unit
(control unit) CAN com-
munica-
tionABS malfunction signal Receives
a malfunction state of ABS
ABS operation signal Receives an operational state of ABS
ABS warning lamp signal Receives an ON/OFF state of ABS warning lamp
TCS malfunction signal Receives a malfunction state of TCS
TCS operation signal Receives an operational state of TCS
VDC OFF switch signal Receives an ON/OFF state of VDC
VDC malfunction signal Receives a malfunction state of VDC
VDC operation signal Receives an operational state of VDC
Vehicle speed signal (ABS) Receives wheel speeds of four wheels
Stop lamp switch signal Receives an operational state of the brake pedal
Yaw rate signal Receives yaw rate acting on the vehicle
Steering angle
sensor CAN com-
munica-
tionSteering angle sensor malfunction signal Receives a malfunction state of steering angle sensor
Steering angle sensor signal
Receives the number of revolutions, turning direction of
the steering wheel
Steering angle speed signal Receives the turning angle speed of the steering wheel
AV control unit CAN com-
munica-
tionSystem selection signal
Receives a selection state of each item in “Driver As-
sist” selected with the navigation system
Transfer control
unit CAN com-
munica-
tion
Current 4WD mode signal Receives a mode selection state of the 4WD shift mode
ICC sensor ITS com-
munica-
tion
ICC sensor signal
Receives detection results, such as the presence or ab-
sence of a vehicle ahead and distance from the vehicle
Accelerator
pedal actuator ITS com-
munica-
tionAccelerator pedal actuator operation status
signal
Receives an operational state of accelerator pedal ac-
tuator
Reception unit Signal name Description
ABS actuator
and electric
unit (control
unit) CAN commu-
nication
Brake fluid pressure control signal Transmits a brake fluid pressure control signal to acti-
vates the brake
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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SYSTEM
FUNCTION DESCRIPTION
When a vehicle is detected ahead The vehicle ahead detection indicator comes ON.
When vehicle approaches a vehicle ahead If the drive

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SYSTEM
FUNCTION DESCRIPTION
When a vehicle is detected ahead The vehicle ahead detection indicator comes ON.
When vehicle approaches a vehicle ahead If the driver is not depressing the accelerator pedal, t
he system activates the brakes to decelerate smoothly
as necessary. If the vehicle ahead comes to a stop, the vehicle decelerates to a standstill within the limita-
tions of the system.
If the driver is depressing the accelerator pedal, the system moves the accelerator pedal upward to assist
the driver to release the accelerator pedal.
When brake operation by driver is required The system alerts the driver by a warning chime and blinking the vehicle ahead detection indicator. If the
driver is depressing the accelerator pedal after the wa rning, the system moves the accelerator pedal upward
to assist the driver to switch to the brake pedal.
CAUTION:
If the vehicle ahead comes to a stan dstill, the vehicle decelerates to a standstill within the limitations
of the system. The system will release brake control wi th a warning chime once it judges the vehicle is
at a standstill. To prevent the vehicle from moving , the driver must depress the brake pedal. [The sys-
tem will resume control automatically once the system reaches 5 km/h (3 MPH)].
NOTE:
Depending on the position of the accelerator pedal, the system may not be able to assist the driver to
release the accelerator pedal appropriately.
When the driver depresses the accelerator pedal even further while the system is moving the acce\
lerator pedal upward, the accelerator pedal control will be canceled.
When the driver is depressing the accelerator pedal, the brake control by the system is not operated.
When the driver is depressing the brake pedal, neither the brake control nor the alert by the system oper-
ates.
When the ICC system is set, the DCA system will be canceled.
OPERATION DESCRIPTION
ICC sensor calculates a distance from a vehicle ahead and a relative speed to transmit the ICC sensor signal
to the ADAS control unit via ITS communication. Based on the received signal, the ADAS control unit trans-
mits a control signal to the accelerator pedal actuator via ITS communication and to the ABS actuator control
unit (control unit) via CAN communication.
Combination
meter CAN commu-
nicationMeter display
signal
Vehicle ahead detec-
tion indicator signal
Transmits a signal to display a state of the system on
the information display
DCA system switch in-
dicator signal
ICC warning lamp signal Transmits an ICC warning lamp signal to turn ON the
ICC system warning lamp
Buzzer output signal Transmits a buzzer output signal to activate the buzz-
er
ICC sensor ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
Steering angle sensor signal Transmits a steering angle sensor signal received
from the steering angle sensor
Accelerator
pedal actuator ITS commu-
nicationAccelerator pedal position signal
Transmits an accelerator pedal angle calculated by
the ADAS control unit
Accelerator pedal feedback force control
signal Transmits a target actuation force value calculated by
the ADAS control unit
ICC brake hold
relay ICC brake hold relay drive signal
Activates the brake hold relay and turns ON the stop
lamp
Reception unit Signal name Description
Revision: 2010 May2011 QX56

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Operation Condition
ADAS control unit performs the control when the following conditions are satisfied.
When the DCA sy

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Operation Condition
ADAS control unit performs the control when the following conditions are satisfied.
When the DCA system setting on the navigation screen is ON.
When the dynamic driver assistance switch is turned to ON.
When the brake pedal is not depressed.
When the vehicle speed is above approximately 5 km/h (3 MPH).
When the vehicle ahead is detected.
When the ICC system is not set.
No Operation Condition
The ADAS control unit is not operat e when the system is under any condi tions of the no operation condition.
When the brake pedal depressed.
When the ICC system is set.
When the system judges that the vehicle co mes to a standstill by the system control.
When the vehicle ahead is not detected.
Operation Cancellation Condition
The ADAS control unit cancels the operation when the syst em is under any conditions of the operation cancel-
lation condition.
When the dynamic driver assistance switch is turned to OFF.
When the system malfunction occurs.
When ABS or VDC (including the TCS) operates.
When the VDC is turned OFF.
When the SNOW mode switch is turned ON.
When the 4WD shift switch is turned to not AUTO position.
When driving into a strong light (i.e., sunlight).
When the ICC sensor body window is dirty and the measurement of the distance between the vehicles
becomes difficult.
Operation At The Driver Operation
Give priority to the driver operation in the following situation.
When vehicle approaches a vehicle ahead If the driver is not depressing the acceler-
ator pedal, the system activates the
brakes to decelerate smoothly as neces-
sary
If the driver is depressing the accelerator
pedal, the system moves the accelerator
pedal upward to assist the driver to re-
lease the accelerator pedal
When brake operation by driver is required The system alerts the driver by a warning
chime and blinking the vehicle ahead de-
tection indicator. If the driver is depressing
the accelerator pedal after the warning,
the system moves the accelerator pedal
upward to assist the driver to switch to the
brake pedal
Deceleration control It transmits the brake fluid
pressure control signal to the ABS actuator and electric unit (control unit) via
CAN communication and performs the brake control
Accelerator pedal actuation
control It transmits the accelerator pedal feedback force control signal to the accelerator pedal actuator via ITS
communication and controls the accelerator pedal in the upward directionJSOIA0222ZZ
JSOIA0094ZZ
JPOIA0170GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >[DCA]
SYSTEM
When the accelerator pedal is depressed again.
When the brake pedal is depressed.
Fail-safe (ADAS
Control Unit)INFOID:0000000006223501
If a malfunction

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OPERATION
Switch Name and FunctionINFOID:0000000006223503
Menu Displayed by Pressing Each SwitchINFOID:0000000006223504

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INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >[DCA]
OPERATION
Approach Warning Display
If own vehicle comes closer to the vehicle ahead due to r
apid deceleration of that vehicle or if another vehi-
cle cuts in, th

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NOTE:
When the DCA system is automatic ally canceled, the cancellation condition can be displayed on “WORK
SUPPORT”

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