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:

After replacing the ECM on vehicles with a dynamic laser cruise control system, it is necessary to initialize the ECM so that the ECM can recognize the dynamic laser cruise control system (See INSTALLATION ).
After replacing the distance control ECU, it is necessary to initialize the distance control ECU so that the ECU can recognize the specification of the vehicle (See INSTALLATION ).
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.

Preparation for adjusting the laser beam axis
1. Adjust the tires pressure properly (See INSPECTION ).
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 1.0 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 Beam Axis
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Reflector (SST) placement
1. Measure the height to the center of the laser luminous portion.
  
  Fig 2: Identifying Height 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: Identifying Center Height Of Reflector And 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: Identifying Mark Center Points (Both Front And Rear) Of Vehicle
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Extend the 10 m 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: Adjusting Right And Left Point From Front Of Vehicle
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. From the 5 m (16.41 ft) marked position, measure 569 mm (22.4 in.) to the right and place the reflector there.
  
  Fig 6: Identifying Reflector Placement Point And Laser Sensor Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Perform it as precise as possible.

Adjust the laser beam axis

Connect the Techstream to the Data Link Connector 3 (DLC3).
Turn the ignition switch to ON.
Turn the Techstream main switch on, and turn the cruise control main switch on.
Select Connect to vehicle.
Select each item on the display screen and proceed to the next screen.
Under System Selection Menu, select Laser Cruise.
Select Utility.
Select Beam Axis Adjustment and proceed to the next screen.
Follow the Techstream display, and continue with the adjustment.
Confirm the current value of the laser beam (The default reading is 6.3° when the reflector position is out of range.)
HINT:
- Check that Upper Side or Lower Side is displayed in area A.
- Check that Left Side or Right Side is displayed in area B.
- Check that an angle value between 0.0 and 6.3 is displayed in area C.
Fig 7: Identifying Current Value Of Laser Beam
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Move the reflector either to the right or left by 100 mm (19.69 in.) and check that the value changes.
NOTE:
When the values do not change, it is possible that the direction of the laser radar sensor is greatly off target, and that the laser radar sensor is aiming at something different. Check the installation condition of the laser radar sensor.

Return the reflector to the original position and read the current angle.

Standard

SPECIFICATION CHART

Display	Angle
Upper/Lower Side	Below 2°
Right/Left Side	Below 4°

HINT:

When the values displayed on the screen are normal, the values should be within the standard value ranges shown above. If any value is out of the range, check the installation condition of the bumper reinforcement, etc. as it can not be adjusted automatically.

Turn the headlight dimmer switch to the TAIL position.
Beam axis adjustment will be performed automatically.
When the adjustment is completed, the Upper/ Lower Side and Right/Left Side indicators show 0° and the system beeps for 10 seconds. During this time, Upper and Lower flash alternately on the screen, and Left and Right flash alternately on the screen.
NOTE: Adjustment values are calculated and then stored in the laser sensor. As the system is not controlled mechanically, the same value as before is displayed to adjust the beam axis.

Fig 8: Screen Display - Laser Cruise Divergence Data
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002