LEXUS PARKING ASSIST-SENSOR SYSTEM


  1. OPERATION


    1. Depending on the detection distance and the detection area, the sound pattern of the No. 1 clearance warning buzzer will vary.

      Detection Area

      Detection Distance

      (mm (in.))

      		 Buzzer Sound Pattern

      On

      (msec.)

      Off

      (msec.)
      Front Corner Long 600 +/- 60 to 450 +/- 50 (23.6 +/- 2.4 to 17.7 +/- 2.0) 200 200
      Middle 450 +/- 50 to 300 +/- 30 (17.7 +/- 2.0 to 11.8 +/- 1.2) 100 100
      Short 300 +/- 30 or less (11.8 +/- 1.2 or less) Continuous Sound 0
      Front Center Longest 1000 +/- 100 to 500 +/- 50 (39.4 +/- 4.0 to 19.7 +/- 2.0) 200 500
      Long 500 +/- 50 to 400 +/- 40 (19.7 +/- 2.0 to 15.7 +/- 1.6) 200 200
      Middle 400 +/- 40 to 300 +/- 30 (15.7 +/- 1.6 to 11.8 +/- 1.2) 100 100
      Short 300 +/- 30 or less (11.8 +/- 1.2 or less) Continuous Sound 0
      Rear Corner Long 600 +/- 60 to 450 +/- 50 (23.6 +/- 2.4 to 17.7 +/- 2.0) 200 200
      Middle 450 +/- 50 to 300 +/- 30 (17.7 +/- 2.0 to 11.8 +/- 1.2) 100 100
      Short 300 +/- 30 or less (11.8 +/- 1.2 or less) Continuous Sound 0
      Rear Center Longest 1500 +/- 150 to 600 +/- 60 (59.1 +/- 5.9 to 23.6 +/- 2.4) 200 500
      Long 600 +/- 60 to 450 +/- 50 (23.6 +/- 2.4 to 17.7 +/- 2.0) 200 200
      Middle 450 +/- 50 to 350 +/- 40 (17.7 +/- 2.0 to 13.8 +/- 1.6) 100 100
      Short 350 +/- 40 or less (13.8 +/- 1.6 or less) Continuous Sound 0

    2. When a sensor malfunction is detected or a sensor is frozen or dirty, the No. 1 clearance warning buzzer sounds 5 cycles according to the following timing:

      A004BYEE06

    3. The ultrasonic sensors are divided into 2 groups: a front section group (front corners and front center) and a rear section group (rear corners and rear center). If multiple ultrasonic sensors detect obstructions at the same time, the No. 1 clearance warning buzzer sounds as follows, in accordance with the detection distance and detection area of each group:

      Buzzer Sound Pattern On/Off Time (msec.)
      Detection Distance Short (*B) Middle (*B) Long (*B) Longest (*B) Not detected
      Short (*A) Timing 1 Timing 2 Timing 2 Timing 2 Continuous Sound
      Middle (*A) Timing 2 100/100 100/100 100/100 100/100
      Long (*A) Timing 2 100/100 200/200 200/200 200/200
      Longest (*A) Timing 2 100/100 200/200 200/500 200/500
      Not detected Continuous Sound 100/100 200/200 200/500 None

      *A: Front section

      *B: Rear section

      A004C9ZE01

    4. Clearance Warning Buzzer Mute Function


      1. When a sensor detects an obstacle with the shift position not in P and R, the No. 1 clearance warning buzzer can be temporarily muted using the steering pad switch assembly.

      2. The mute function is canceled when any of the following conditions is met:


        • Shift position is changed to P or R

        • Vehicle speed is approximately 10 km/h or more

        • Power switch is turned off

        • Lexus parking assist-sensor system is turned off

        • Shift position signal is lost

        • Vehicle speed signal is lost

        • Sensor malfunction (open circuit/communication malfunction), freezing or unavailable condition is detected

        • Communication is lost with combination meter