Infiniti QX56 (Z62). Manual — part 258
DAS
SYSTEM
DAS-69
< SYSTEM DESCRIPTION >
[DCA]
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Output Signal Item
Transmit unit
Signal name
Description
ECM
CAN com-
munica-
tion
Closed 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-
tion
Input 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-
tion
ABS 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-
tion
Steering 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-
tion
System 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-
tion
Accelerator 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
DAS-70
< SYSTEM DESCRIPTION >
[DCA]
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, the 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 warning, 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 standstill, the vehicle decelerates to a standstill within the limitations
of the system. The system will release brake control with 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 accelerator
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-
nication
Meter 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-
nication
Vehicle 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-
nication
Accelerator 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
DAS
SYSTEM
DAS-71
< SYSTEM DESCRIPTION >
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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 operate when the system is under any conditions of the no operation condition.
• When the brake pedal depressed.
• When the ICC system is set.
• When the system judges that the vehicle comes 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 system 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 direction
JSOIA0222ZZ
JSOIA0094ZZ
JPOIA0170GB
DAS-72
< 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 occurs in each system, ADAS control unit cancels each control, sounds a beep, and turns ON
the warning lamp or indicator lamp.
Fail-safe (ICC Sensor)
INFOID:0000000006223502
If a malfunction occurs in the ICC sensor, ADAS control unit cancels control, sounds a beep, and turns ON the
ICC system warning lamp in the combination meter.
System
Buzzer
Warning lamp/Indicator lamp
Description
Vehicle-to-vehicle distance control mode
High-pitched
tone
ICC system warning lamp
Cancel
Conventional (fixed speed) cruise control mode
High-pitched
tone
ICC system warning lamp
Cancel
Intelligent Brake Assist (IBA)
High-pitched
tone
IBA OFF indicator lamp
Cancel
Forward Collision Warning (FCW)
High-pitched
tone
IBA OFF indicator lamp
Cancel
Distance Control Assist (DCA)
High-pitched
tone
ICC system warning lamp
Cancel
Lane Departure Warning (LDW)
—
Lane departure warning lamp
Cancel
Lane Departure Prevention (LDP)
Low-pitched
tone
Lane departure warning lamp
Cancel
Blind Spot Warning (BSW)
—
BSW warning lamp
Cancel
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