System Description
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
| Transmit unit | Signal name | Description | ||
|---|---|---|---|---|
| ABS actuator and electric unit (control unit) | CAN communication | Vehicle speed signal | Receives wheel speeds of four wheels | |
| Combination meter | CAN communication | System selection signal | Receives a selection state each item in "Driver Assistance" selected on the information display | |
| Distance sensor | ITS communication | Distance sensor signal | Receives detection results, such as the presence or absence of a leading vehicle and distance from the vehicle | |
Output Signal Item
| Reception unit | Signal name | Description | ||
|---|---|---|---|---|
| Combination meter | CAN communication | Meter display signal | Vehicle ahead detection indicator signal | Transmits a signal to display a state of the system on the information display |
| Distance sensor | ITS communication | Vehicle speed signal | Transmits a vehicle speed calculated by the ADAS control unit | |
| ADAS control unit 2 | ITS communication | Warning buzzer signal | Transmits a warning buzzer signal to activate the buzzer | |
DESCRIPTION
- The PFCW system will function when own vehicle is driven at speeds of approximately 5 km/h (3 MPH) and above.
- The Predictive Forward Collision Warning (PFCW) System alerts the driver by the vehicle ahead detection indicator and chime when the distance between own vehicle and a vehicle in front of the vehicle ahead becomes closer.
NOTE:
The PFCW/FEB system shares the diagnosis function with ICC/DCA system.
FUNCTION DESCRIPTION
The distance from the vehicle in front of the vehicle ahead and a relative speed are calculated by using the distance sensor and an distance sensor signal is transmitted to the ADAS control unit via ITS communication. When judging the necessity of warning according to the received distance sensor signal, the ADAS control unit transmits a warning buzzer signal to the ADAS control unit 2 via ITS communication and meter display signal to the combination meter via CAN communication.
PFCW Operating Condition
- Warning systems ON indicator: ON
- Vehicle speed: Approximately 5 km/h (3 MPH) and above.
- Vehicle in front of the vehicle ahead: Detected.
NOTE:
ON/OFF of PFCW/FEB system is performed with the navigation screen.