DISTANCE & SPEED ALERT (DSA) [(E)]

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Outline

•  The distance & speed alert (DSA) warns the driver using the multi-infomation display based on the calculated time to the vehicle ahead.
Warning
•  The distance & speed alert (DSA) indicates the warning when the distance between the vehicle ahead is too close for safe driving. The distance & speed alert (DSA) system does not keep the distance between the vehicle ahead.
•  The distance & speed alert (DSA) may not operate normally under the following conditions.
―  Visibility is reduced due to a vehicle ahead casting off water, snow, or sand.
―  Heavy cargo is loaded in the luggage compartment or on the rear seat.
―  Ice, snow or dirt adheres to the surface of the radiator grille or front emblem.
―  Inclement weather caused by snow, rain or sand storms.
―  Driving near facilities and buildings which emit strong radio waves.
―  The distance between the vehicle and the vehicle ahead is extremely short.
―  Another vehicle cuts into the driving lane ahead of the vehicle.
―  Driving on a continuously curving road.
―  Entering or exiting a curve.
―  Driving on narrow lane roads due to road construction or lane closures.
―  The vehicle ahead or an obstruction enters the blind spot of the radar unit.
―  Driving under erratic conditions in which there is a surrounding accident or vehicle breakdown.
―  Driving on roads with repeated up and down slopes.
―  Driving on poor roads or unpaved roads.

Structure/Construction


System structure

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Functions


Notification

•  When the calculated distance is close, i-ACTIVSENSE Status Symbol (Warning / Risk Avoidance Support System) changes from green to amber and the warning indication is displayed on the multi-information display.


Personalization

•  The distance & speed alert (DSA) can be personalized as follows: For details on the personalization features, refer to the [PERSONALIZATION FEATURES]
―  The system can be set to ON (operational)/OFF (non-operational) (initial setting is ON (operational).)


System conditions display

•  The body control module (BCM) displays the system status in the multi-information display.

Condition

i-ACTIVSENSE status symbol

i-ACTIVSENSE OFF symbol

i-ACTIVSENSE warning light

Multi-information display indication (Instrument cluste

Active driving display

Center display
Distance & Speed Alert is ON (operable)
Distance between the vehicle ahead is close *1
Off
Off
No display
No display
Distance between the vehicle ahead is not close
Off
Off
No display
No display
No display
No vehicle ahead is detected
Off
Off
No display
No display
No display
Strong light is shone at FSC
Off
On
No display
No display
Temperature of FSC is high
Off
On
No display
No display
FSC has a malfunction
Off
On
No display
No display
Temperature of front radar sensor is high
Off
On
No display
No display
Front radar sensor has a malfunction
Off
On
No display
No display
Distance & speed Alert OFF (non-operational)
System is OFF (non-operational)
No display
Off
No display
No display
No display

*1  :The distance between vehicles varies depending on the vehicle speed. For details on the distance between vehicles, refer to the Distance between vehicles chart (reference). (See Distance between vehicles chart (reference).)

System wiring diagram

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Block diagram

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Operation


Notification

Operation condition
―  Vehicle speed calculated by body control module (BCM), based on wheel speed signals received via CAN communication from DSC HU/CM, is 30 km/h {19 mph} or more
Operation
1.  The body control module (BCM) calculates the distance between the detecting vehicle and the vehicle ahead based on the object information (1) from the front radar sensor and the forward sensing camera (FSC), and sends a driving assist system status signal (2) to the instrument cluster.
2.  When the instrument cluster receives a driving assist system status signal (2) from the body control module (BCM), it changes the color of i-ACTIVSENSE Status Symbol (Warning / Risk Avoidance Support System) from green to amber (3) and display the warning indication (3) on the multi-information display.
Note
When i-ACTIVSENSE switch*1/ i-ACTIVSENSE OFF switch*2 is operated with the distance & speed alert (DSA) turned on, the distance & speed alert (DSA) turns off.
*1:With i-ACTIVSENSE switch
*2:With i-ACTIVSENSE OFF switch
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Distance between vehicles chart (reference)

Monitoring vehicle speed (km/h {mph})

Distance between vehicles (m {ft})
Approx. 30 {19}
Approx. 3 {10}
Approx. 60 {37}
Approx. 5 {16}
Approx. 90 {56}
Approx. 8 {26}