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Millimeter Wave Radar Sensor: Adjustment

  1. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    CAUTION: Exposure to radio frequency emissions is hazardous to your health. It is hazardous to your health to be within 20 cm (7.87 in.) of the device's radio frequency aperture.
    Fig 1: Adjusting Millimeter Wave Radar Sensor
    G05751354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • This device complies with FCC radio frequency emission regulations.
    • Perform measurements on a level surface.
    • Make sure that no large pieces of metal are within a 10 m (32.81 ft.) x 14 m (45.93 ft.) area in front of the vehicle. If possible, the surrounding area should also be free of large metal objects.
    1. Before adjusting the radar beam axis, prepare the vehicle as follows.
      1. Check the tire pressure and adjust it if necessary.
      2. Remove all excess weight from the vehicle (luggage, heavy objects, etc)
    2. Check and adjust the vertical direction of the radar sensor.
      1. Remove dust, oil, and foreign matter from the radar sensor's level rack
      2. Set a level on the radar sensor's level rack.
        Fig 2: Identifying Radar Sensor Level Rack
        G05751355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Check that the air bubble is within the red frame on the level.

        OK: The air bubble is within the red frame on the level. 

        If the bubble is not within the red frame, use a screwdriver to adjust bolt A until the air bubble is within the red frame. 

        Fig 3: Identifying Radar Sensor Level Air Bubble
        G05751356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        • The adjustable range within the red frame on the level is +/- 0.2°.
        • The target angle is +0.2° (upward angle of 0 2°)

        Result 

        RESULT REFERENCE

        Adjustment Direction Adjustment Procedure Adjustment Angle
        Vertical adjustment
        • Left direction. Turn bolt A to negative (-) side
        • Right direction: Turn bolt A to positive (+) side
        		 For every 8.4 rotations of adjustment bolt, sensor moves about 1°
    3. Adjust the reflector height.
      1. Adjust the reflector so that the center of the SST reflector is the same height as the millimeter wave radar sensor.

        SST 09870-60000 (09870-60010,09870-60040) 

        HINT:

        Prepare a 10 m (32.81 ft.) string, a string with a sharp-pointed weight (plumb bob), and a 5 m (16.41 ft.) tape measure.

        Fig 4: Identifying Millimeter Wave Radar Sensor
        G05751357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Place the reflector.
      1. Hang the string with a weight from the center of the vehicle rear emblem. Mark the vehicle rear center point on the ground. Repeat the same procedure for the front of the vehicle.
        Fig 5: Identifying Distance Between String And Vehicle
        G05751358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Set one end of the 10 m (32.81 ft.) string on the vehicle rear center point Run the string over the vehicle front center point to a position 5 m (16.41 ft.) beyond the vehicle front center point, as shown in the illustration. Mark the 5 m (16.41 ft) position.
        3. Fig 6: Adjusting Center By Moving String
        G05751359Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Using the tape measure, measure 12 mm (0.47 in.) to the left of the 5 m (16.41 ft.) position. Place the reflector at that position.
        Fig 7: Identifying Millimeter Wave Radar Sensor Position
        G05750661Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: Perform the operation as precisely as possible.
    5. Check the radar beam axis.
      1. Connect the Techstream to the DLC3.
      2. Turn the engine switch on (IG).
      3. Turn the Techstream main switch on, and turn the cruise control main switch on.
      4. Select "Connect to Vehicle"
      5. Select each item on the display screen and proceed to the next screen
      6. From "System Selection Menu", select "Radar Cruise".
      7. Select "Utility"
      8. Select "Beam Axis Adjustment" and proceed to the next screen.
      9. Follow the Techstream display, and continue with the adjustment
      10. Confirm that the distance value is approximately 5 m (16 41 ft.)
      11. Check the following items on the laser cruise divergence data screen.
        1. Check that a value between 0.0 and 6 3 is displayed in A
        2. Check that a value between 0.0 and 20 7 is displayed in B.
        3. Check that Left Side or Right Side is displayed in C
        4. Check that an angle value between 0 0 and 6 3 is displayed in D.
          Fig 8: Identifying Techstream Display
          G05751361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

          HINT:

          If the distance is 0 m (0 ft), the sensor cannot detect the target Reconfirm that there is no metal in the specified area m front of the vehicle (refer to  1 read the "NOTE:" article below).

    6. Check and adjust the horizontal direction of the radar sensor.
      1. Check that the divergence of the radar beam axis is 0°

        Standard: 

        0° (Both right and left) 

        If the divergence is not as specified, use a screwdriver to adjust bolt B until the divergence of the radar beam axis is 0°. 

      2. Based on the measured divergence of the beam axis, turn and adjust bolt B for horizontal adjustment of the millimeter wave radar sensor using a screwdriver.
        Fig 9: Identifying Adjust Bolt
        G05751362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        BOLT ADJUSTMENT DIRECTION REFERENCE

        Adjustment Direction Adjustment Procedure Adjustment Angle
        Horizontal adjustment
        • Right direction Turn bolt B to positive (+) side
        • Left direction Turn bolt B to negative (-) side
        		 For every 18 6 rotations of adjustment bolt, sensor moves about 1 °

        HINT.

        • If "Left Side 1.0°" is displayed, the divergence is 1.0° to the left Turn bolt B approximately 3 turns to the negative (-) side
        • If the value does not change to 0°, it is possible that the sensor is aiming at something different. Reconfirm that there are no reflective materials in the surrounding area
      3. Reset the radar sensor's driving learning values Prepare a piece of metal that can block radio waves, such as aluminum foil Cover the radar sensor's left half with the metal for 10 seconds
        NOTE: Be sure to keep the reflector in place and make sure that there is nothing between the sensor's right half and the reflector.
        Fig 10: Identifying Metal
        G05750664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT.

        When the reset is completed, the buzzer sounds for 10 seconds

      4. Disconnect the Techstream from the DLC3
    7. Recheck and readjust the vertical direction of the radar sensor.
      1. Set a level on the radar sensor's level rack
        Fig 11: Identifying Radar Sensor Level
        G05751355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check that the level's air bubble is within the red frame

        OK: Level's air bubble is within the red frame. If the bubble is not within the red frame, use a screwdriver to adjust bolt A until the level's air bubble is within the red frame. 

        HINT.

        • The adjustable range within the red frame is +/- 0.2°.
        • The target angle is +0.2° (upward angle of 0 2°).
          Fig 12: Identifying Radar Sensor Level Air Bubble
          G05751356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          BOLT ADJUSTMENT DIRECTION REFERENCE

          Adjustment Direction Adjustment Procedure Adjustment Angle
          Vertical adjustment
          • Left direction Turn bolt A to negative (-) side
          • Right direction Turn bolt A to positive (+) side
          		 For every 8 4 rotations of adjustment bolt, sensor moves about 1 °
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