INFINITI QX56 2011 Factory Service Manual
Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
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DAS-276
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
LANE DEPARTURE PREVENTION (LDP ) SYSTEM : Component Description
INFOID:0000000006223703
Component Description
ADAS control unit Judges lane](/img/42/57033/w960_57033-1240.png "INFINITI QX56 2011 Factory Service Manual
DAS-276
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
LANE DEPARTURE PREVENTION (LDP ) SYSTEM : Component Description
INFOID:0000000006223703
Component Description
ADAS control unit Judges lane")
DAS-276
< SYSTEM DESCRIPTION >[LDW & LDP]
COMPONENT PARTS
LANE DEPARTURE PREVENTION (LDP ) SYSTEM : Component Description
INFOID:0000000006223703
Component Description
ADAS control unit Judges lane departure based on each signal and calculates yaw moment necessary to generate
force toward the direction to recover the vehicle from the lane departure
Outputs the warning buzzer signal to the warning buzzer
Transmits a target yaw moment signal to the ABS actuator and electric unit (control unit) via CAN communication
Transmits the lane departure warning lamp signal and LDP ON indicator lamp signal to combina- tion meter via CAN communication
Lane camera unit Detects the lane marker in travel lane
Transmits the detected lane condition signal to ADAS control unit via ITS communication
ABS actuator and electric unit
(control unit) Transmits the vehicle speed signal (wheel speed) to ADAS control unit via CAN communication
Transmits the yaw rate signal and side G sensor signal to ADAS control unit via CAN communi-
cation
Receives a target yaw moment signal from the ADAS control unit via CAN communication and
controls brake pressure of four wheels, respectively
Warning buzzer Activates the warning buzzer, according to a warning buzzer signal received from the ADAS control
unit
Dynamic driver assistance
switch
(On the ICC steering switch) ECM receives an ICC steering switch (dynamic driver assistance switch) signal and transmits the
signal to ADAS control unit via CAN communication
Combination meter Turns on the following indicator/warning lamp, according to a signal received for the ADAS control
unit via CAN communication
LDP ON indicato
r lamp (Green)
Lane departure warning lamp (Yellow)
BCM Transmits the turn indicator signal to ADAS control unit via CAN communication
ECM Transmits the accelerator pedal position signal, engine speed signal and ICC steering switch signal
(dynamic driver assistance switch signal) to ADAS control unit via CAN communication
Steering angle sensor Transmits the steering angle sensor signal to ADAS control unit via CAN communication
TCM Transmits the output shaft revolution signal, input speed signal, current gear position signal and shift
position signal to ADAS control unit via CAN communication
Transfer control unit Transmits the current 4WD mode signal to ADAS control unit via CAN communication
AV control unit Transmits the system selection signal to ADAS control unit via CAN communication
Revision: 2010 May2011 QX56
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DAS
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DAS-277
< SYSTEM DESCRIPTION >[LDW & LDP]
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LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW ) SYSTEM : System DescriptionINFOID:000000000](/img/42/57033/w960_57033-1241.png "INFINITI QX56 2011 Factory Service Manual
DAS
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DAS-277
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LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW ) SYSTEM : System DescriptionINFOID:000000000")
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DAS-277
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LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW ) SYSTEM : System DescriptionINFOID:0000000006223704
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
Output Signal Item
FUNCTION DESCRIPTION
Lane Departure Warning (LDW) system provides a l ane departure warning function when the vehicle is
driven at speeds of approximately 70 km/h (45 MPH) or more.
JSOIA0285GB
Transmit unit Signal name Description
ABS actuator
and electric unit
(control unit) CAN com-
munica-
tion
Vehicle speed signal (ABS) Receives
wheel speeds of four wheels
BCM CAN com-
munica-
tionTurn indicator signal
Receives an operational state of the turn signal lamp
and the hazard lamp
Lane camera
unit ITS com-
munica-
tion
Detected lane condition signal Receives detection results of lane marker
Warning sys-
tems switch Warning systems switch signal
Receives an ON/OFF state of the warning systems
switch
Reception unit Signal name Description
Combination
meter CAN commu-
nication
Lane departure warning lamp signal Transmits a lane departure warning lamp signal to
turn ON the lane departure warning lamp
Lane camera
unit ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
Turn indicator signal Transmits a turn indicator signal received from BCM
Warning buzz-
er Warning buzzer signal Activates the warning buzzer
Warning sys-
tems ON indi-
cator Warning systems ON indicator signal Turns ON the warning systems ON indicator
Revision: 2010 May2011 QX56
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DAS-278
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
When the vehicle approaches either the left or the ri
ght side of the traveling lane, a warning will sound and
the lane departure warning lamp (yell](/img/42/57033/w960_57033-1242.png "INFINITI QX56 2011 Factory Service Manual
DAS-278
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
When the vehicle approaches either the left or the ri
ght side of the traveling lane, a warning will sound and
the lane departure warning lamp (yell")
DAS-278
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
When the vehicle approaches either the left or the ri
ght side of the traveling lane, a warning will sound and
the lane departure warning lamp (yellow) on the combination meter will blink to alert the driver.
The warning does not occur during turn signal operation (Lane change side).
The warning function will stop when the vehicle returns inside of the lane markers.
EXAMPLE
When the vehicle approaches the right lane marker, the driv er is alerted by the buzzer and the blinking of lane
departure warning lamp (yellow).
OPERATION DESCRIPTION
When the system is turned ON by operating the warning systems switch, ADAS control unit turns ON the
warning systems ON indicator.
Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal
to ADAS control unit via ITS communication.
When judging from a lane marker detection signal that the vehicle is approaching the lane marker, the ADAS
control unit controls the following item to alert the driver.
- Activates warning buzzer
- ADAS control unit transmits a lane departure warning lamp signal to combination meter via CAN communi- cation and turns ON/OFF the lane departure warning lamp (yellow).
OPERATING CONDITION
Warning systems ON indicator: ON
Vehicle speed: approximately 70 km/h (45 MPH) or more
Turn indicator signal: After 2 seconds or more from turned OFF
NOTE:
After the operating conditions of warning are satisfi ed, the warning continues until the vehicle speed reaches
approximately 60 km/h (40 MPH)
LDP ON indicator lamp is OFF
The LDW system may not function proper ly, depending on the situation. Refer to DAS-288, "
Precautions for
Lane Departure Warning/Lane Departure Prevention"
Bulb Check Action and Fail-safe Indication
JPOIA0014GB
Vehicle condition/ Driver's operation Warning sys-
tems ON indi- cator Indication on the combination meter
Ignition switch
OFF ⇒ ON
(Bulb check) Approx. 5 sec.
ON
*
JPOIA0017GB
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DAS
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DAS-279
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NOTE:
*: If LDW initial state is ON, warning systems ON indicator continues turned ON.
LDW INITIAL STATE CHANGE
CAU](/img/42/57033/w960_57033-1243.png "INFINITI QX56 2011 Factory Service Manual
DAS
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DAS-279
< SYSTEM DESCRIPTION >[LDW & LDP]
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NOTE:
*: If LDW initial state is ON, warning systems ON indicator continues turned ON.
LDW INITIAL STATE CHANGE
CAU")
DAS
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DAS-279
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NOTE:
*: If LDW initial state is ON, warning systems ON indicator continues turned ON.
LDW INITIAL STATE CHANGE
CAUTION:
Never change LDW initial state “ON” ⇒ “OFF” without the con sent of the customer.
LDW initial state can be changed.
LDW initial ON* - LDW function is automatically turned ON, when the ignition switch OFF ⇒ ON.
LDW initial OFF - LDW function is st ill OFF when the ignition switch OFF ⇒ ON.
*: Factory setting
How to change FCW/LDW/BSW initial state
1. Turn ignition switch ON.
2. Warning systems switch is OFF.
3. Push and hold warning systems switch for more than 4 seconds.
4. Buzzer sounds and blinking of the warning systems ON indicator informs that the FCW/LDW/BSW initial
state change is completed.
LANE DEPARTURE WARNING (LDW) SYSTE M : Fail-safe (ADAS Control Unit)
INFOID:0000000006223705
If a malfunction occurs in each system, ADAS control unit cancels eac h control, sounds a beep, and turns ON
the warning lamp or indicator lamp.
When DTC is detected
(Except “C1B01” and “C1B03”) ON
Camera aiming is not completed
(“C1B01”is detected)
NOTE:
This is detected while driving the vehicle and the indication
remains ON until the ignition switch is turned OFF ON
Temporary disabled status at high temperature
(“C1B03”is detected) ON
Vehicle condition/ Driver's operation
Warning sys-
tems ON indi-
cator Indication on the combination meter
JPOIA0019GB
JPOIA0020GB
System Buzzer Warning lamp/Indicator lamp Description
Vehicle-to-vehicle distance control mode High-pitched
toneICC system warning lamp Cancel
Conventional (fixed speed) cruise control mode High-pitched
toneICC system warning lamp Cancel
Intelligent Brake Assist (IBA) High-pitched
tone
IBA OFF indicator lamp Cancel
Forward Collision Warning (FCW) High-pitched
toneIBA OFF indicator lamp Cancel
Distance Control Assist (DCA) High-pitched
toneICC 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
Revision: 2010 May2011 QX56
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DAS-280
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223706
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the la](/img/42/57033/w960_57033-1244.png "INFINITI QX56 2011 Factory Service Manual
DAS-280
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223706
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the la")
DAS-280
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223706
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the lane camera unit, ADAS control unit cancels control, and turns ON the lane
departure warning lamp in the combination meter.
TEMPORARY DISABLED STATUS AT HIGH TEMPERATURE
If the vehicle is parked in direct sunlight under high temperature conditions, the system may be deactivated
automatically. And the lane departure warning lamp (yellow) in the combination meter will blinks.
When interior temperature is reduced, the system will resume operation automatically and the lane depar-
ture warning lamp (yellow) in the combination meter will stop blinking.
LANE DEPARTURE PREV ENTION (LDP) SYSTEM
LANE DEPARTURE PREVENTION (LDP ) SYSTEM : System DescriptionINFOID:0000000006223707
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
JSOIA0286GB
Transmit unit Signal name Description
ECM CAN com-
munica-
tionAccelerator 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
Snow mode signal Receives an operational state of the snow mode
Revision: 2010 May2011 QX56
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DAS
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DAS-281
< SYSTEM DESCRIPTION >[LDW & LDP]
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Output Signal Item
TCM CAN com-
munica-
tionInput speed signal Receives the number of revolutions of input shaft
Cur](/img/42/57033/w960_57033-1245.png "INFINITI QX56 2011 Factory Service Manual
DAS
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DAS-281
< SYSTEM DESCRIPTION >[LDW & LDP]
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Output Signal Item
TCM CAN com-
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tionInput speed signal Receives the number of revolutions of input shaft
Cur")
DAS
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DAS-281
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Output Signal Item
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
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
Yaw rate signal Receives yaw rate acting on the vehicle
Side G sensor signal Receives lateral G acting on the vehicle
Combination
meter CAN com-
munica-
tion
Parking brake switch signal Receives an operational state of the parking brake
BCM CAN com-
munica-
tion
Turn indicator signal
Receives an operational state of the turn signal lamp
and the hazard lamp
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-
tion
System selection signal
Receives a selection state of each item in “Driver Assis-
tance” 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 switch
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
Lane camera
unit ITS com-
munica-
tion
Detected lane condition signal Receives detection results of lane marker
Transmit unit Signal name Description
Reception unit Signal name Description
ABS actuator
and electric
unit (control
unit) CAN commu-
nication
Target yaw moment signal Transmits a target yaw moment signal to generate
yaw moment to the vehicle
Combination
meter CAN commu-
nicationLDP ON indicator lamp signal
Transmits an LDP ON indicator lamp signal to turn ON
the LDP ON indicator lamp
Lane departure warning lamp signal Transmits an lane departure warning lamp signal to
turn ON the lane departure warning lamp
Revision: 2010 May2011 QX56
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DAS-282
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
FUNCTION DESCRIPTION
Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance
when the vehicle is drive](/img/42/57033/w960_57033-1246.png "INFINITI QX56 2011 Factory Service Manual
DAS-282
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
FUNCTION DESCRIPTION
Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance
when the vehicle is drive")
DAS-282
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
FUNCTION DESCRIPTION
Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance
when the vehicle is driven at speeds of approximately 70 km/h (45 MPH) or more.
When the vehicle approaches either the left or the right side of the traveling lane, a warning sounds and the
lane departure warning lamp (yellow) on the combinati on meter blinks to alert the driver. Then, the LDP sys-
tem automatically applies the brakes for a short period of ti me to help assist the driver to return the vehicle to
the center of the traveling lane.
Warning and brake control are not performed during turn signal operation (lane change side).
The warning and assist functions stop when the vehicl e returns to a position inside of the lane marker.
EXAMPLE
When the vehicle approaches the right lane marker, the driv er is alerted by the buzzer and the blinking of lane
departure warning lamp (yellow). Simultaneously, the left brake is controlled independently to generate force
toward the direction to recover the vehicle from the lane departure.
OPERATION DESCRIPTION
When the system is turned ON by dynamic driver a ssistance switch, ADAS control unit transmits LDP ON
indicator signal to combination meter via CAN communication.
Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit via ITS communication.
When judging from a lane marker detection signal that the vehicle is approaching the lane marker, ADAS
control unit controls the following items.
- Activates warning buzzer.
- Transmits a lane departure warning lamp signal to combination meter via CAN communication.
- Calculates necessary yaw moment to transmit a target yaw moment signal to ABS actuator and electric unit (control unit) via CAN communication.
When receiving the target yaw moment signal, ABS act uator and electric unit (control unit) controls brake
pressure of four wheels, respectively.
When receiving the signal from ADAS control unit, combination meter turns ON/OFF the lane departure warning lamp (yellow) and the LDP ON indicator lamp (green).
OPERATING CONDITION
LDP ON indicator lamp: ON
Vehicle speed: approximately 70 km/h (45 MPH) or more
Turn indicator signal: After 2 seconds or more from turned OFF
NOTE:
When the LDP system setting on the navigation screen is ON.
Lane camera
unit ITS commu-
nicationVehicle speed signal
Transmits a vehicle speed calculated by the ADAS
control unit
Turn indicator signal Transmits a turn indicator signal received from BCM
Warning buzz-
er Warning buzzer signal Activates the warning buzzer
Reception unit Signal name Description
JPOIA0013GB
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DAS
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DAS-283
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After the operating conditions are satisfied, the c ontrol continues until the vehicle speed reaches approxi-
mate](/img/42/57033/w960_57033-1247.png "INFINITI QX56 2011 Factory Service Manual
DAS
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DAS-283
< SYSTEM DESCRIPTION >[LDW & LDP]
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After the operating conditions are satisfied, the c ontrol continues until the vehicle speed reaches approxi-
mate")
DAS
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DAS-283
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After the operating conditions are satisfied, the c ontrol continues until the vehicle speed reaches approxi-
mately 60 km/h (40 MPH).
The LDP system may not function properly, depending on the situation. Refer to DAS-288, "
Precautions for
Lane Departure Warning/Lane Departure Prevention".
Bulb Check Action and Fail-safe Indication
LANE DEPARTURE PREVENTION (LDP) SYSTEM : Fail-safe (ADAS Control Unit)
INFOID:0000000006223708
If a malfunction occurs in each system, ADAS control unit cancels eac h control, sounds a beep, and turns ON
the warning lamp or indicator lamp.
Vehicle condition/ Driver's operation Indication on the combination meter Buzzer
Ignition switch
OFF ⇒ ON
(Bulb check) —
When DTC is detected
(Except “C1B01” and “C1B03”) Beep
Camera aiming is not completed
(“C1B01”is detected)
NOTE:
This is detected while driving the vehicle and the indication remains ON
until the ignition switch is turned OFF
Temporary disabled status at high temperature
(“C1B03”is detected)
Beep
When the dynamic driver assistance switch is pressed
[When the settings of LDP system, DCA system on the navigation screen
are both “OFF”] —
JPOIA0017GB
JPOIA0019GB
JPOIA0020GB
JPOIA0036GB
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
toneICC system warning lamp Cancel
Intelligent Brake Assist (IBA) High-pitched
toneIBA OFF indicator lamp Cancel
Forward Collision Warning (FCW) High-pitched
tone
IBA OFF indicator lamp Cancel
Distance Control Assist (DCA) High-pitched
toneICC system warning lamp Cancel
Lane Departure Warning (LDW) — Lane departure warning lamp Cancel
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DAS-284
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE PREVENTION (LDP) SYST EM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223709
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the](/img/42/57033/w960_57033-1248.png "INFINITI QX56 2011 Factory Service Manual
DAS-284
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE PREVENTION (LDP) SYST EM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223709
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the")
DAS-284
< SYSTEM DESCRIPTION >[LDW & LDP]
SYSTEM
LANE DEPARTURE PREVENTION (LDP) SYST EM : Fail-safe (Lane Camera Unit)
INFOID:0000000006223709
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the lane camera unit, ADAS control unit cancels control, sounds a beep, and turns
ON the lane departure warning lamp in the combination meter.
TEMPORARY DISABLED STATUS AT HIGH TEMPERATURE
If the vehicle is parked in direct sunlight under high temperature conditions, the system may be deactivated
automatically. And the buzzer sounds and lane departure warning lamp (yellow) in the combination meter
will blinks.
When interior temperature is reduced, the system will resume when dynamic driver assistance switch is
turned OFF and turned ON and the lane departure warning lamp (yellow) in the combination meter will stop
blinking.
Lane Departure Prevention (LDP) Low-pitched
toneLane departure warning lamp Cancel
Blind Spot Warning (BSW) — BSW warning lamp Cancel System Buzzer Warning lamp/Indicator lamp Description
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DAS
OPERATIONDAS-285
< SYSTEM DESCRIPTION > [LDW & LDP]
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LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Switch Name and Function
INFO](/img/42/57033/w960_57033-1249.png "INFINITI QX56 2011 Factory Service Manual
DAS
OPERATIONDAS-285
< SYSTEM DESCRIPTION > [LDW & LDP]
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OPERATION
LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Switch Name and Function
INFO")
DAS
OPERATIONDAS-285
< SYSTEM DESCRIPTION > [LDW & LDP]
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OPERATION
LANE DEPARTURE WARNING (LDW) SYSTEM
LANE DEPARTURE WARNING (LDW) SYSTEM : Switch Name and Function
INFOID:0000000006223710
LANE DEPARTURE WARNING (LDW) SYSTEM : Menu Displayed by Pressing Each
Switch
INFOID:0000000006223711
INDICATOR LAMP AND WARNING LAMP
DISPLAY AND WARNING
JSOIA0277ZZ
No. Switch name Description
1 Warning systems switch Turns LDW/FCW/BSW systems ON/OFF
JSOIA0345ZZ
No. Display item Description
1 Warning systems ON indicator Indicates that the LDW/FCW/BSW systems are ON
Blinks when the initial setting of LDW/FCW/BSW system is changed
2 Lane departure warning lamp Blinks when LDW system is activated
Turns ON when LDW system has a malfunction
Blinks when the temperature of the lane camera unit becomes high
Revision: 2010 May2011 QX56