BLIND SPOT MONITOR SYSTEM DETAILS


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Blind Spot Monitor Sensor LH and RH

    • The blind spot monitor sensor RH receives various signals and transmits them to the blind spot monitor sensor LH.

    • 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.

    • 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.

    • Flashes to inform the driver that a vehicle has been detected in the blind spot detection area while the driver is reversing.
    Combination Meter Assembly Multi-information Display When a malfunction is detected in the blind spot monitor sensors or the blind spot monitor sensors determine that control is not possible, a warning message is displayed to warn the driver.
    Combination Meter Assembly Transmits the turn light signal to the blind spot monitor sensor RH.
    Steering Sensor Transmits the steering angle signal to the blind spot monitor sensor RH.
    ECM Transmits the reverse signal to the blind spot monitor sensor 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 RH.
    Main Body ECU (Multiplex Network Body ECU) Transmits the destination signal, illumination signal and dimmer signal to the blind spot monitor sensor RH.
    Rear Cross Traffic Alert Buzzer (Blind Spot Monitor Buzzer) Sounds when a vehicle is detected in the rear side direction while the driver is reversing.

  2. OPERATING CONDITION


    1. The blind spot monitor function 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 function 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.

        A01HWLWE01
        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) - -
        A01HWLM Detection Area - -

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

        A01HWGEE02
        Text in Illustration
        *a This Vehicle - -
        A01HWB2 Vehicle Speed (Fast) A01HWL8 Vehicle Speed (Slow)
        A01HWLM Detection Area - -

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

        A01HWI7E02
        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 - -
        A01HWB2 Motion direction of this vehicle A01HWL8 Motion direction of other vehicle
        A01HWLM Detection Area - -

    3. The rear cross traffic alert function operates when both of the following conditions are met:


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

      2. The shift lever is in R.

      3. The speed of this vehicle is less than approximately 8 km/h (5 mph).

      4. Target vehicle's speed is between approximately 8 km/h (5 mph) and 28 km/h (18 mph).

    4. The rear cross traffic alert function can detect vehicles in its detection areas.


      1. The system continuously measures the relative speed of an approaching vehicle and its distance. If it is determined that the approaching vehicle will cross in the path of this vehicle, the Estimated Crossing Time (ECT) is calculated. When the ECT is 2.5 seconds or less, the system alerts the driver by flashing the outer rear view mirror indicator lights and sounding the rear cross traffic alert buzzer (blind spot monitor buzzer).

        A01HWMCE01
        Text in Illustration
        *a This Vehicle *b Target Vehicle (Approximately 8 km/h (5 mph))
        *c Target Vehicle (Approximately 28 km/h (18 mph)) *d Approximately 5.5 m (18.0 ft.)
        *e Approximately 20 m (66 ft.) *f Target Detection Line
        A01HWP2 Alert Area - -

      2. Normal Parking

        A01HWNBE01
        Text in Illustration
        *a This Vehicle *b Target Vehicle
        A01HWLM Alert 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.

        A01HWGTE01
        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.

  4. OPERATION


    1. Blind Spot Monitor Function


      1. According to operation conditions, the blind spot monitor function 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.

        A01HWDUE01

    2. Rear Cross Traffic Alert Function


      1. According to operation conditions, the rear cross traffic alert function promotes safety confirmation by using the outer rear view mirror indicator lights and rear cross traffic alert buzzer (blind spot monitor buzzer) to inform the driver that another vehicle has entered the blind spot monitor sensor alert area of this vehicle.

      2. When this vehicle is reversing, if a vehicle enters the detection area of the blind sport monitor sensors and it is determined the vehicle will cross in the path of this vehicle, the system alerts the driver by flashing the outer rear view mirror indicator lights and sounding the rear cross traffic alert buzzer (blind spot monitor buzzer).

        A01HWICE01

  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.