BLIND SPOT MONITOR SYSTEM DETAILS


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Blind Spot Monitor Sensor LH and RH

    • Outputs millimeter waves from the blind spot monitor sensor to the blind spot sensor detection area, uses the reflected millimeter waves for detecting the presence of a vehicle, the vehicle-to-vehicle distance, and the relative speed, and then transmits this information to the built-in signal processing circuit.

    • The signal processing circuit determines if a vehicle is present, and illuminates or blinks the outer rear view mirror indicator accordingly.

    • Dims the outer rear view mirror indicator light on the outer rear view mirror assembly.
    Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly) Pressing the blind spot monitor main switch (warning canceling switch assembly) turns the blind spot monitor system on or off.
    Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly) Blind Spot Monitor ON/OFF Indicator Light When the blind spot monitor system is on, the indicator will come on.
    Outer Rear View Mirror Assembly LH and RH Outer Rear View Mirror Indicator Light

    • Illuminates to inform the driver that a vehicle has been detected in the blind spot detection area.

    • Flashes to inform the driver when the turn signal lever is operated if a vehicle has been detected in the blind spot detection area.
    Combination Meter Assembly Master Warning Light When a malfunction is detected in the blind spot monitor sensors or the blind spot monitor sensors determine that control is not possible, the master warning light illuminates and a message is displayed on the multi-information display to warn the driver.
    Multi-information Display
    Combination Meter Assembly Transmits the turn light signal to the blind spot monitor sensor LH and RH.
    Steering Sensor Transmits the steering angle signal to the blind spot monitor sensor LH and RH.
    ECM Transmits the reverse signal to the blind spot monitor sensor LH and RH.
    Network Gateway ECU Transmits data between the CAN V bus and CAN sub bus 2.

    Brake Actuator Assembly

    - Skid Control ECU

    		 Transmits the vehicle speed signal to the blind spot monitor sensor LH and RH.
    Main Body ECU (Multiplex Network Body ECU)

    • Transmits the destination signal to the blind spot monitor sensor LH and RH.

    • Transmits the illumination signal to the blind spot monitor sensor LH and RH.

    • Transmits the dimmer signal to the blind spot monitor sensor LH and RH.
    Outer Mirror Control ECU Assembly LH and RH Transmits the indicator light signal to the outer rear view mirror assembly.

  2. OPERATING CONDITION


    1. The blind spot monitor system operates when both of the following conditions are met:


      1. The blind spot monitor main switch (warning canceling switch assembly) is on.

      2. The vehicle speed is greater than approximately 16 km/h (10 mph).

    2. The blind spot monitor system can detect vehicles in its detection areas.


      1. The detection areas formed by the blind spot monitor sensor LH and RH are as shown below.

        A01GW0KE01
        Text in Illustration (Detection Area:)
        *a Approximately 3.5 m (11.5 ft) *b 3.0 m (9.8 ft)
        *c 1 m (3.3 ft) - -
        A01GVI3 Detection Area - -

      2. When this vehicle is overtaken by another vehicle in the adjacent lane.

        A01GVM9E02
        Text in Illustration
        *a This Vehicle - -
        A01GVKO Vehicle Speed (Fast) A01GVJY Vehicle Speed (Slow)
        A01GVI3 Detection Area - -

      3. When another vehicle enters the detection area of this vehicle due to a lane change.

        A01GVQNE02
        Text in Illustration
        *a Other vehicle enters the detection area during lane change (merge in) (Type 1). *b Other vehicle enters the detection area during lane change (merge in) (Type 2).
        *c This Vehicle - -
        A01GVKO Motion direction of this vehicle A01GVJY Motion direction of other vehicle
        A01GVI3 Detection Area - -

  3. CONSTRUCTION


    1. Blind Spot Monitor Sensor


      1. The blind spot monitor sensor consists of a millimeter wave radar circuit and signal processing circuit.

      2. The millimeter wave radar uses frequencies in the 24 GHz band.

        A01GW0UE01
        Text in Illustration
        *1 Blind Spot Monitor Sensor LH *2 Blind Spot Monitor Sensor RH
        *a Distance: Approximately 50 m (164 ft.) *b Horizontal Angle: Approximately 150°
        *c Vertical Angle: Approximately 20° - -

      3. The distance to the object, azimuth, and relative speed are calculated from the information that is provided by the reflected millimeter wave radar as described below.

        Item Calculation Method
        Distance Calculated from the length of time that has elapsed from the time the waves of the millimeter wave radar have been emitted, until the reflected waves are received by the millimeter wave radar circuit. The distance is approximately 50 m (164 ft.).
        Azimuth Calculated from the reception angle of the millimeter wave radar reflections received. The detection angle has a horizontal range of approximately 150° and a vertical range of approximately 20°.
        Relative Speed Calculated by utilizing the change (Doppler effect*) that occurs in the frequency of the reflected millimeter wave radar waves.

        Tech Tips

        *: The Doppler effect causes the observer to perceive the radio waves emitted by a moving object to be a higher frequency as it approaches, and to be a lower frequency as it recedes. This phenomenon is created because when an object is located far away, the radio waves are perceived at higher frequencies than those of the radio source. An SST is used if radar axis confirmation is needed. For details, refer to the Repair Manual.

  4. OPERATION


    1. According to operation conditions, the blind spot monitor system promotes safety confirmation by using the outer rear view mirror indicator light to inform the driver that another vehicle has entered the blind spot monitor sensor detection area of this vehicle.

    2. The outer rear view mirror indicator light informs the driver that a vehicle is present in the blind spot detection area by illuminating when the turn light switch is not operated, and by flashing when a vehicle is present and the turn light switch is operated.

      A01GVYDE01

  5. DIAGNOSIS


    1. The blind spot monitor system is equipped with a diagnosis function that can display warning messages in the multi-information display. For details, refer to the Repair Manual.