PRE-CRASH SAFETY SYSTEM > GENERAL



OUTLINE


  1. Pre-crash Safety (PCS) System

    1. The pre-crash safety system predicts the possible collision of the vehicle with an obstacle, based on information received from various sensors. The obstacle may be a vehicle traveling in the opposite direction. PCS lessens the damage sustained in a collision by operating in unison with other systems. As part of this, the effectiveness of the pretensioner mechanism is enhanced by retracting the seat belts, and systems that dampen the impact of the collision, such as the brake control system, are operated.



    2. This system uses a millimeter wave radar sensor to predict a possible collision with a vehicle or obstacle in front. It retracts the seat belts before the collision and performs brake assist control and brake control*.
      *: Models with Pre-crash Brake


      Y109357E01


PRECAUTION


  1. When the millimeter wave radar sensor detects an object in front of the vehicle under the following conditions, the driving support ECU assembly may determine that a collision is unavoidable, and operate the pre-crash safety system. This does not indicate a malfunction.


    Y109815E01


    Number
    		Condition
    (1)
    		Object near outer edge of a curved road (Guard rail, street light or sign)
    (2)
    		Oncoming traffic on a curved road
    (3)
    		Opposing traffic at an intersection
    (4)
    		Narrow iron bridge
    (5)
    		Metal object, steel plate or bump on the road
    (6)
    		Rapid approach to a preceding vehicle
    (7)
    		Toll gate
    (8)
    		Overpass or sign over the road
    (9)
    		Vehicle height changes significantly (front of vehicle inclined either upward or downward)
    (10)
    		Millimeter wave radar sensor is misaligned (such as after reinstallation or after a collision)
    (11)
    		Metal object such as a sign in front of the vehicle on an uphill slope
    (12)
    		Metal object or steel plate in the ground at the base of a downhill slope

  2. The millimeter wave radar sensor might not be able to detect the following objects as collision objects:

    Objects that cannot be detected
    		Plastic items (safety cones, etc.), etc.
    Objects that cannot be detected in a stable manner
    		People, Bicycles, Motorcycles, Trees, Animals, Snow Fence, etc.

  3. Conditions in which detection performance deteriorates:

    Vehicle height changes significantly (front of vehicle inclined either upward or downward)
    		Millimeter wave radar sensor is misaligned (such as after reinstallation or after a collision)