Camera Assistance Sonar Function
- Sonar sensors are installed on rear bumper. When an obstacle is detected while rear view monitor is displayed, a sonar indicator display and buzzer sound notify the driver of the proximity of an obstacle. When an obstacle is detected while rear view monitor is not displayed, rear view monitor screen is displayed automatically, and then notification is similarly indicated as per the display and buzzer sound.
- Approaching distance between bumper and obstacle is displayed in 3 stages according to the color of the sonar indicator in display and blinking cycle of indicator.
- Warning by buzzer sound notifies distance to obstacle according to a 3-stage cycle.
System Operation Description
- Sonar control unit receives shift position signal from TCM and vehicle speed signal from ABS actuator control unit via CAN communication, and controls ON/OFF of sonar system.
- Sonar control unit transmits detection signal and detection distance signal to AV control unit via CAN communication, according to signal from sonar sensor depending on conditions as shown in the following table. Rear view monitor displays the applicable sonar indicator.
Sonar system operation condition
Sonar operation
Shift position
Vehicle speed
Obstacle
Sonar indicator
Buzzer
R position
Less than 10 km/h (6 MPH)
Yes
Detection status is displayed.
Yes
P or N position
Less than 10 km/h (6 MPH)
Yes
Detection status is displayed. *
None
--
10 km/h (6 MPH) or more
Yes
Not displayed
None
*: Only when camera image is displayed.
- Sonar control unit is equipped with diagnosis function. Corner sensor malfunction and sensor harness open circuit can be detected. Malfunction status is transmitted to AV control unit. Sonar OFF status is displayed and notified to the driver.
Obstacle Detection Distance
- Sonar control unit switches output of sonar indicator and buzzer in 3 stages according to obstacle detection distance from corner sensor.
- Sonar control unit can change setting of obstacle detection distance in 3 stages.
- Sonar control unit can change setting of buzzer volume in 3 stages.
|
A. |
Approx. 50 cm (19.7 in) |
B. |
Approx. 15 cm (5.9 in) |
|
Warning item |
Front corner sensor |
Front center sensor |
Rear corner sensor |
Rear center sensor |
|
First warning |
-- |
60 - 100 cm (23.6 - 39.4 in) |
-- |
60 - 150 cm (23.6 - 59.1 in) |
|
Second warning |
50 - 60 cm (19.7 - 23.6 in) |
50 - 60 cm (19.7 - 23.6 in) |
50 - 60 cm (19.7 - 23.6 in) |
50 - 60 cm (19.7 - 23.6 in) |
|
Third warning |
40 - 50 cm (15.7 - 19.7 in) |
40 - 50 cm (15.7 - 19.7 in) |
40 - 50 cm (15.7 - 19.7 in) |
40 - 50 cm (15.7 - 19.7 in) |
|
Fourth warning |
Less than 40 cm (15.7 in) |
Less than 40 cm (15.7 in) |
Less than 40 cm (15.7 in) |
Less than 40 cm (15.7 in) |
Sonar Indicator Display
- When AV control unit receives detection signal and detection distance signal from sonar control unit, the AV control unit displays the sonar indicator on display unit.
- AV control unit changes display color and indicator blinking cycle according to detection distance.
Warning Buzzer Frequency
- The warning buzzer cycle changes between 4 levels (for center) and 3 levels (for corner) according to the detection distance.
- The nearest sensor from the detected obstacle determines the buzzer cycle if plural sensors detect any simultaneously detected obstacles.
- As for the first, second and third stages, the warning buzzer sounds for 3 seconds at maximum.
- As for the fourth stage, the warning buzzer does not stop even after a lapse of 3 seconds.
- Buzzer stops when the vehicle moves away from an obstacle and the warning level decreases.