Infiniti QX56 (Z62). Manual - part 311

DAS

SYSTEM

DAS-281

< SYSTEM DESCRIPTION >

[LDW & LDP]

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Output Signal Item

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

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-
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 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-
nication

LDP 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

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 combination meter blinks to alert the driver. Then, the LDP sys-
tem automatically applies the brakes for a short period of time 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 vehicle returns to a position inside of the lane marker.

EXAMPLE

When the vehicle approaches the right lane marker, the driver 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 assistance 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 actuator 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-
nication

Vehicle 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

DAS

SYSTEM

DAS-283

< SYSTEM DESCRIPTION >

[LDW & LDP]

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• After the operating conditions are satisfied, the control 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 each 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 
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

DAS-284

< SYSTEM DESCRIPTION >

[LDW & LDP]

SYSTEM

LANE DEPARTURE PREVENTION (LDP) SYSTEM : 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 
tone

Lane departure warning lamp

Cancel

Blind Spot Warning (BSW)

—

BSW warning lamp

Cancel

System

Buzzer

Warning lamp/Indicator lamp

Description