Infiniti FX35, FX50 (S51). Manual - part 409

 

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Infiniti FX35, FX50 (S51). Manual - part 409

 

 

CCS-456

< SYSTEM DESCRIPTION >

[LDW & LDP]

LANE DEPARTURE PREVENTION (LDP) SYSTEM

LANE DEPARTURE PREVENTION (LDP) SYSTEM

System Diagram

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System Description

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OUTLINE

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CCS

LANE DEPARTURE PREVENTION (LDP) SYSTEM

CCS-457

< SYSTEM DESCRIPTION >

[LDW & LDP]

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• Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance

when the vehicle is driven at speeds of approximately 72 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 system 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.

• The warning and assist functions stop when the vehicle returns to a position inside of the lane marker.
NOTE:
• LDP system settings can be changed by using the vehicle settings function in the navigation system.
• When the ignition switch is in ACC position, LDP system settings cannot be changed.

BASIC OPERATIONS

Switches and Indicator/Warning Lamps

Bulb Check Action and Fail-safe Indication 

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1.

• LDP ON indicator lamp (Green)
• Lane departure warning lamp (Yel-

low)

2.

LDP switch
(Shared with DCA switch)

A.

On the combination meter

B.

On the ICC steering switch

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CCS-458

< SYSTEM DESCRIPTION >

[LDW & LDP]

LANE DEPARTURE PREVENTION (LDP) SYSTEM

LDP SYSTEM CONTROL DESCRIPTION

• LDP system is controlled by lane camera unit and LDP controller [ABS actuator and electric unit (control

unit)].
NOTE:
LDP controller is integrated in the ABS actuator and electric unit (control unit).

• Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal

to ABS actuator and electric unit (control unit) via CAN communication.

• ABS actuator and electric unit (control unit) detects vehicle conditions depending on each signal.
• Combination meter turns the lane departure warning lamp and LDP ON indicator lamp ON/OFF according to

the signals from the lane camera unit via CAN communication (through unified meter and A/C amp.).

• When ABS actuator and electric unit (control unit) judges vehicle deviation from the traveling lane, it controls

following actions.

- Requests warning to the lane camera unit via CAN communication to alert the driver. And then lane camera

unit controls the lane departure warning buzzer and it requests the lane departure warning lamp activation to
combination meter.

- Calculates the necessary yaw moment. And then it controls the brake pressure of each wheel individually to

generate the intended movement.

• ICC sensor integrated unit receives signals from the AV control unit and the ECM and transmits an LDP ON

signal to the ABS control unit.

LDP OPERATING CONDITION

• LDP ON indicator lamp: ON

NOTE:
• When the LDP system setting on the navigation screen is ON.
• LDW ON indicator is OFF.

• Vehicle speed: approximately 72 km/h (45 MPH) or more

Vehicle condition/Driver's operation

Indication on the combination meter

Ignition switch:
OFF 

 ON

When DTC is detected
(Except “C1B01” or “C1B03”)

Camera aiming is not completed
(“C1B01” is detected)

Temporary disabled status at high temperature
(“C1B03” is detected)

When the LDP switch is turned ON with settings of DCA system and 
LDP system OFF

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CCS

LANE DEPARTURE PREVENTION (LDP) SYSTEM

CCS-459

< SYSTEM DESCRIPTION >

[LDW & LDP]

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NOTE:
For details of LDP system operating conditions, refer to normal operating condition 

CCS-533, "Description"

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SIGNAL INPUT/OUTPUT BY CAN COMMUNICATION

The lane camera unit and ABS actuator and electric unit (control unit) transmit/receive each signals via CAN
communication. They also detect the vehicle conditions necessary for LDP control.

Input

Output

Vehicle speed

(Approx.)

[km/h (MPH)]

Vehicle condition/ Driver's 

operation

Action

Indication on the combination meter

Buzzer

Less than 64 

(40)

Close to lane marker

No action

72 (45) or 

more

Close to lane marker

Warning and yawing
• Buzzer sounds
• Warning lamp blinks
• Brake control

Short continu-

ous beeps

• Close to lane marker
• Turn signal ON (Deviate 

side)

No action

Close to lane with soft brak-
ing

Warning
• Buzzer sounds
• Warning lamp blinks

Short continu-

ous beeps

VDC OFF switch:
OFF 

 ON

Cancellation
• Buzzer sounds
• Indicator lamp blinks
NOTE:
When LDP switch is ON 

 

OFF, indicator lamp is turned 
OFF.

Beep

SNOW MODE switch:
OFF 

 ON

(If equipped)

Cancellation
• Buzzer sounds
• Indicator lamp blinks
NOTE:
When LDP switch is ON 

 

OFF, indicator lamp is turned 
OFF.

Beep

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