System Description
SYSTEM DIAGRAM
| Component | Description |
|---|---|
| ECM | ECM (With Barometric Pressure Sensor) |
| TCM | TCM |
| ABS actuator and electric unit (control unit) | ABS Actuator and Electric Unit (Control Unit) |
| BCM | System Description |
| Steering angle sensor | Steering Angle Sensor |
| Front camera unit | Front Camera Unit |
| ADAS control unit 2 | ADAS Control Unit 2 |
| Combination meter (FULL TFT METER) | Combination Meter |
| Combination meter (7 INCH INFORMATION DISPLAY) | Combination Meter |
| Steering vibration motor | Steering Vibration Motor |
| Chassis control module | Chassis Control Module |
ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
| Transmit unit | Signal name | Description | |
|---|---|---|---|
| ECM | CAN communication | Accelerator pedal position signal | Receives accelerator pedal position (angle) |
| Engine speed signal | Receives engine speed | ||
| TCM | CAN communication | 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 select lever position | ||
| Output shaft revolution signal | Receives the number of revolutions of output shaft | ||
| ABS actuator and electric unit (control unit) | CAN communication | 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 signal | Receives an ON/OFF state of ESP | ||
| VDC malfunction signal | Receives a malfunction state of ESP | ||
| VDC operation signal | Receives an operational state of ESP | ||
| 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 communication | System selection signal | Receives a selection state of each item in "Driving Aids" selected with the information display |
| BCM | CAN communication | Turn indicator signal | Receives an operational state of the turn signal lamp and the hazard lamp |
| Steering angle sensor | CAN communication | 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 | ||
| Front camera unit | CAN communication | Detected lane condition signal | Receives detection results of lane marker |
Output Signal Item
| Reception unit | Signal name | Description | |
|---|---|---|---|
| ABS actuator and electric unit (control unit) (via chassis control module) | CAN communication | Target yaw moment signal | Transmits a target yaw moment signal to generate yaw moment to the vehicle |
| Combination meter | CAN communication | Meter display signal | Transmits an meter display signal to turn ON the LDP system display |
| Front camera unit | CAN communication | Vehicle speed signal | Transmits a vehicle speed calculated by ADAS control unit 2 |
| Turn indicator signal | Transmits a turn indicator signal received from BCM | ||
| Steering vibration motor | Motor operation signal | Activates a motor operation signal to active the steering vibration motor | |
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 60 km/h (37 MPH) or more.
- When the vehicle approaches either the left or the right side of the traveling lane, a steering vibration activates and the LDP warning display on the information display 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.
- 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 steering vibration and the blinking of LDP indicator. 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 2 transmits meter display signal to combination meter via CAN communication.
- Front camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit 2 via chassis CAN communication.
- When judging from a lane marker detection signal that the vehicle is approaching the lane marker, ADAS control unit 2 controls the following items.
- Activates the steering vibration motor by ADAS control unit 2.
- Transmits a meter display 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 2, combination meter turns ON/OFF the LDP system display.
OPERATION CONDITION
ADAS control unit 2 performs the control when the following conditions are satisfied.
- LDP system: ON
- Vehicle speed: approximately 60 km/h (37 MPH) or more
- Turn indicator signal: After 2 seconds or more from turned OFF
NOTE:
- LDP system ON/OFF can be set on the information display.
- After the operating conditions are satisfied, the control continues until the vehicle speed reaches approximately 50 km/h (31 MPH).
- The LDP system may not function properly, depending on the situation.
CANCEL CONDITION
The ADAS control unit 2 cancels the operation when the system is under any conditions of the operation cancellation condition.
- When the system malfunction occurs.
- When the VDC or ABS (Including the TCS) operates.
- When the VDC is turned OFF
- When the SNOW mode is selected (AWD models).
- When the OFF-ROAD mode is selected (AWD models).
- When the SAND mode is selected (AWD models).
- When the MUD/RUT mode is selected (AWD models).
- When the front camera unit becomes high temperature [over approximately 40 °C (104 °F)].