AUTOMATIC REAR FLASHING HAZARD LIGHTS SYSTEM


  1. OUTLINE


    1. The Automatic Rear Flashing Hazard Lights (ARFHL) system flashes the hazard warning lights rapidly to warn vehicles to the rear when the blind spot monitor sensors determine that a rear-end collision could occur (and that the probability of a rear-end collision is high), based on factors including the distance between this vehicle and the vehicle to the rear, the relative speed, and the direction. When this occurs, a message is displayed on the multi-information display to notify the driver that a vehicle is approaching from the rear.

      B003HJAC01
      *1 Own Vehicle *2 Approaching Vehicle from Rear
      *a Hazard Warning Lights Flash Rapidly - -

    2. The ARFHL system consists of the 2 blind spot monitor sensors, steering sensor, yawrate sensor, turn signal lights and combination meter assembly. (refer to the Repair Manual: BLIND SPOT MONITOR SYSTEM)

  2. PRECAUTION


    1. The ARFHL system may not detect vehicles correctly in the following situations:


      1. When the sensor is misaligned due to a strong impact to the sensor or its surrounding area.

      2. When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding area on the rear bumper.

      3. When driving on a road surface that is wet with standing water during bad weather such as heavy rain, snow, or fog.

      4. When driving on roads with sharp bends, consecutive curves, or uneven surfaces.

      5. When a vehicle to the rear is not straight to the rear.

      6. When a vehicle approaches diagonally from the rear.

      7. When there is a significant difference in speed between this vehicle and the vehicle that enters the detection area.

      8. When a vehicle quickly enters the area to the rear of this vehicle.

      9. When a vehicle is following this vehicle, and another vehicle is near that vehicle.

      10. When an accessory (such as a bicycle carrier) or towing eyelet is installed to the rear of the vehicle.

        Tech Tips

        In this section, the expression "this vehicle" is used to refer to the vehicle equipped with this blind spot monitor system.

    2. Instances of the ARFHL system unnecessarily detecting a vehicle and/or object may increase under the following situations:


      1. When the sensor is misaligned due to a strong impact to the sensor or its surrounding area.

      2. When multiple vehicles are near this vehicle.

      3. When a vehicle passes from directly behind this vehicle, such as when the vehicle is stopped while waiting to make a right or left turn.

      4. When a vehicle passes from directly to the side of this vehicle, such as when the vehicle is stopped on the side of the road.

      5. When a vehicle to the rear overtakes this vehicle from a short distance.

      6. When a vehicle to the rear rapidly approaches this vehicle to within a short distance.

        Tech Tips

        In this section, the expression "this vehicle" is used to refer to the vehicle equipped with this blind spot monitor system.

    3. Blind spot monitor sensors are installed inside the left and right side of the vehicle rear bumper respectively. Observe the following to ensure the ARFHL system can function correctly.


      1. Keep the sensors and the surrounding areas on the rear bumper clean at all times.

      2. Do not subject a sensor or its surrounding area on the rear bumper to a strong impact. If a sensor is moved even slightly off position, the system may malfunction and vehicles may not be detected correctly.


        • A sensor or its surrounding area is subject to a strong impact.

        • If the surrounding area of a sensor is scratched or dented, or part of them has become disconnected.

      3. Do not disassemble the sensor.

      4. Do not attach stickers to the sensor or surrounding area on the rear bumper.

      5. Do not modify the sensor or surrounding area on the rear bumper.

      6. Do not paint the rear bumper any color other than an official Lexus color.