Lane Departure Warning (LDW) System
FUNCTION DIAGNOSISLANE DEPARTURE WARNING (LDW) SYSTEM
System Diagram
System Description
OUTLINE
- Lane Departure Warning (LDW) system provides a lane departure warning function 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 will sound and the lane departure warning lamp (yellow) on the combination meter will blink to alert the driver.
- The warning function will stop when the vehicle returns inside of the lane markers.
BASIC OPERATIONS
Switches And Indicator/Warning Lamps
LDW INITIAL STATE CHANGE
CAUTION: Never change LDW initial state "ON"->"OFF" without the consent 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 still OFF when the ignition switch OFF ->ON.
*: Factory setting
How to change LDW initial state
1. Turn ignition switch ON.
2. Switch LDW and LDP functions to OFF.
3. Push and hold LDW switch for more than 4 seconds.
4. Buzzer sounds and blinking of the lane departure warning lamp informs that the LDW initial state change is completed.
LDW SYSTEM CONTROL DESCRIPTION
- LDW system is controlled by lane camera unit.
- Lane camera unit monitors lane markers of the traveling lane.
- Combination meter turns the lane departure warning lamp ON/OFF according to the signal from the lane camera unit via CAN communication (through unified meter and A/C amp.).
- When the lane camera unit judges vehicle deviation from the traveling lane, it controls following actions to alert the driver.
- Requests the lane departure warning lamp activation to combination meter.
- Controls the lane departure warning buzzer.
LDW OPERATING CONDITION
- LDW ON indicator: ON
NOTE: LDP ON indicator lamp is OFF.
- Vehicle speed: approximately 72 km/h (45 MPH) or more
NOTE: For details of LDW system operating conditions, refer to normal operating condition CCS-189, "Description". Normal Operating Condition
SIGNAL INPUT/OUTPUT BY CAN COMMUNICATION
Lane camera unit receives signals via CAN communication. It also detects vehicle conditions that are necessary for LDW control.
Component Description
