Laser Sensor: Adjustment

CAUTION:

Do not stare at the luminous portion of the laser during adjustment. The intensity of the laser light is low, but it may result in loss of sight.
If operation is not carried out as specified, there may be a risk that you are exposed to hazardous radiation.

HINT:

When replacing the ECM of the vehicle with Laser Cruise Control with a new one, perform procedure (1) to (5) in step (c) on pages 82-7 and 82-7-1 so that the ECM recognizes that the vehicle is equipped with Laser Cruise Control.
There is a limitation on laser beam axis adjustment.
Since the laser sensor is installed in the bumper reinforcement, it is important that the laser sensor, bumper reinforcement, etc. are installed properly.
When the sensor is removed from the vehicle for trouble diagnosis or repair, it is necessary to adjust the laser beam axis after the operation.

ADJUST LASER SENSOR
NOTE:
- Perform measurement indoors on a level ground and in front of a blank wall. Park the vehicle at least 9 m (29.53 ft) from the wall. When performing adjustment outdoors, make sure that it is not raining or snowing.
- Check that there are no reflective materials in the surroundings or on the ground.
- If you can not secure a distance of about 9 m (29.53 ft) in front of the vehicle, be sure to secure at least 7 m (22.97 ft) from the vehicle, and cover the area marked [A] with a black cloth. If not covered with a black cloth, the laser sensor may detect something other than the target and it will fail to adjust properly.
1. Preparation for adjusting the laser beam axis
  1. Adjust the tires pressure properly.
    (See WHEEL & TIRE SYSTEM )
  2. Luggage in the vehicle such as in the trunk should be unloaded.
  3. Clean the light-luminous and light-receiving portions of the laser sensor.
  4. Prepare a 10 m (32.81 ft) string, a string with a sharp-pointed weight, and a 5 m (16.41 ft) tape measure.
    
    Fig 1: Adjusting Laser Sensor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reflector (SST) placement
  1. Measure the height to the center of the laser luminous portion.
    
    Fig 2: Measuring Height To Center Of Laser Luminous Portion
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Adjust the center height of the reflector 48 mm (1.89 in.) higher than the center of the luminous portion.
    SST 09870-60000 (09870-60010, 09870-60020)
    
    NOTE: Adjust it as precise as possible.
    
    Fig 3: Adjusting Center Height Of Reflector Higher Than Center Of Luminous Portion
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. From the center (center of the emblem) of the front and rear bumpers, hang down the sharp-pointed weight and mark the center points (both front and rear) of the vehicle on the ground.
    
    Fig 4: Measuring For Reflector (SST) placement (1 of 2)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Extend the string from the rear center mark forward through the front center mark. Make a mark 5 m (16.41 ft) forward of the front marked point.
    HINT:
    
    Fix one end of the string to the rear center mark and move the other end to the right and left at a point 5 m (16.41 ft) from the front of the vehicle. Make a 5 m (16.41 ft) mark when the string and the front vehicle center mark intersect.
    
    Fig 5: Measuring For Reflector (SST) placement (2 of 2)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. From the 5 m (16.41 ft) marked position, measure 433 mm (17.05 in.) to the right and place the reflector there.
    NOTE: Perform it as precise as possible.
    
    Fig 6: Identifying Reflector Placement Point
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Adjust the laser beam axis
  1. Turn the ignition switch to ON.
  2. Push the cruise control main switch button on.
  3. Connect the hand-held tester to the DLC3, and turn the power ON.
  4. Operate by following the screeN.menu and select "BEAM AXIS ADJUST" of the Laser Cruise Control, then press "ENTER".
  HINT:
  - Pressing "ENTER" will make the ECM transfer to BEAM AXIS ADJUSTMENT MODE.
  - When the ECM transfer to BEAM AXIS ADJUSTMENT MODE, the buzzer sounds for 1 second.
    
    Fig 7: Hand Held Tester Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002