Lane Departure Warning System

System Description

LDW SYSTEM OPERATION
- The Lane Departure Warning (LDW) system warns the driver when the vehicle is traveling close to either the left or the right of the traveling lane.
- The system monitors lane markers of the traveling lane using the LDW camera unit. When the LDW camera unit detects that the vehicle is traveling close to either the left or the right of the traveling lane, the LDW indicator lamp flashes and a chime sounds to alert the driver.

NOTE: When activating turn signal, LDW system does not give a warning to the lane marker on the turn signal side.

- The LDW system can be turned on or off by pushing the LDW switch. When the system is on, the LDW system ON indicator illuminates.
- The LDW system has an automatic mode and manual mode.

In the automatic mode
- LDW system automatically turns on, when the ignition switch is turned to the ON position.
- LDW system ON indicator located on the LDW switch illuminates, indicating that the system is on.
- To cancel LDW system, push the LDW switch to turn off LDW system ON indicator.
- To turn on the system, push LDW switch again.

In the manual mode
- LDW system is still off when the ignition switch is turned to the ON position.
- The LDW switch must be pushed to turn on the system.

To the change modes
- Push and hold LDW switch for more than 4 seconds, when LDW system ON indicator is off.
- Then LDW chime sounds and blinking of LDW system ON indicator informs that the mode change is completed.
- Temporary disabled status at high temperature

- If the vehicle is parked in direct sunlight under high temperature conditions [approximately over 104 °F (40 °C)] and then started, the LDW system may sound a chime and cancel automatically. Then LDW system ON indicator will blink.
- When the interior temperature is reduced, the system will resume to operate automatically and the LDW system ON indicator illuminates.




Warning Function




System Diagram




Components Description

POWER SUPPLY AND GROUND CIRCUIT
With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No. 12, located in the fuse block (J/B)]
- to LDW camera unit terminal 1.

Ground is supplied
- to LDW camera unit terminals 6 and 12
- through grounds M45, M85 and M35.

CAN Communication

SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN COMMUNICATION UNIT
Refer to "INFORMATION BUS" in "LAN SYSTEM".