LANE DEPARTURE WARNING SYSTEM (LDWS)

id151000002500

Outline

Warning

•  The lane departure warning system (LDWS) is only a supplementary system for the prevention of a lane departure, however the lane departure warning system (LDWS) functions have limitations. Relying solely on the lane departure warning system (LDWS) and neglecting prudent steering wheel operation could cause an unexpected accident resulting in death or serious injury. Do not rely solely on the lane departure warning system (LDWS). Always make lane corrections using the steering wheel and drive safely.

•  The lane departure warning system (LDWS) may not operate normally under the following conditions:

―  Poor vehicle lane line visibility due to adverse weather (rain, snow, fog)

―  Poor vehicle lane line visibility due to backlight, snow on the road, water puddles, road ruts

―  Poor vehicle lane line visibility due to cracks and fissures in the vehicle lane

―  Vehicle lane lines intersect with complexity due to additions or reductions of travel lanes

―  Vehicle lane marking is not completely erased after road maintenance, and there two or more lane lines next to each other

―  Vehicle lane lines not recognized due to vehicle ahead

Caution

•  If the forward sensing camera (FSC) aiming is not completed correctly, the forward sensing camera (FSC) cannot record the camera shooting angle and the lane departure warning system (LDWS) may not operate normally. When performing the following servicing, always perform the forward sensing camera (FSC) aiming. In addition, for the forward sensing camera (FSC) aiming procedure, refer to the [FORWARD SENSING CAMERA (FSC) AIMING] in the Workshop Manual.

―  Forward sensing camera (FSC) replacement

―  Forward sensing camera (FSC) clip replacement

―  Windshield replacement

Structural View

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Functions

Driver operation determination function

•  The body control module (BCM) determines the following driving operations as the driver's intentions and controls the warning operation.

―  The turn switch is operated and the vehicle lane is changed.

System conditions display function

•  The body control module (BCM) displays the system status using the active driving display and the multi-information display.

LDWS status	Condition	i-ACTIVSENSE status symbol	i-ACTIVSENSE OFF symbol	i-ACTIVSENSE warning light	Multi-information display	Active driving display
OFF	System is off	Off		Off	No display	No display
ON	Vehicle lane lines are recognized at a vehicle speed of approx. 64 km/h {40 mph} or more		Off	Off		No display
	While warning is triggered		Off	Off		No display
	Vehicle speed is approx. 56 km/h {35 mph} or less		Off	Off	No display	No display
	Vehicle lane lines are not recognized		Off
	Forward sensing camera (FSC) detects that the camera/windshield is dirty or fogging		Off	On		No display
	Lane departure warning system (LDWS) has a malfunction		Off	On		No display

Operation

System Wiring Diagram

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Block Diagram

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Operation condition

•  The warning is triggered when all of the following conditions are met:

―  LDWS system is on

―  Vehicle speed signal of approx. 64 km/h {40 mph} or more is received from DSC

―  Vehicle contacts warning-trigger line unbeknownst to driver

Operation

•  The period of time in which the warning is triggered differs by the period of time in which the vehicle is contacting the warning-trigger line.

―  Vehicle contacts warning-trigger line for less than 1 sec: Warning triggers for approx. 1 sec

•  The following three types of warnings can be selected using the personalization feature.

―  Steering wheel vibration

―  Beep sound

―  Steering wheel vibration and beep sound

1.  The forward sensing camera (FSC) sends the vehicle lane line information (1) to the body control module (BCM).

2.  When the body control module (BCM) receives the vehicle lane line information (1) from the forward sensing camera (FSC), it determines (2) the warning sound and the warning indication.

3.  If the body control module (BCM) determines that the warning sound and the warning indication are needed, it sends (3) the warning indication request signal to the instrument cluster, and outputs (3) the warning sound signal to the Notification and Warning Speaker (Front).

4.  When the instrument cluster receives the warning indication request signal from the body control module (BCM), it displays (4) the warning indication in the multi-information display.

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