Laser Sensor: Adjustment

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

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) 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.

Preparation for adjusting the laser beam axis
1. Adjust the tires pressure properly. (See WHEEL AND 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 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: 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
  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 Center Of Emblem
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  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 Center By Moving Cord Right To Left
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. From the 5 m (16.41 ft) marked position, measure 569 mm (22.4 in.) to the right and place the reflector there.
NOTE: Perform it as precise as possible.

Fig 6: Identifying Reflector Placement Point & Laser Sensor Position
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Adjust the laser beam axis

Turn the ignition switch to ON.
Push the cruise control main switch button on.
Connect the hand-held tester to the DLC3, and turn the power ON.
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 transfers to BEAM AXIS ADJUSTMENT MODE, the buzzer sounds for 1 second.

Fig 7: Adjusting Laser Beam Axis Menu (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Confirm the current value of the laser beam (The default reading is 6.3° when the reflector is out of range).

Fig 8: Laser Cruise Divergence Data Menu
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1. Either UPPER or LOWER is indicated.

*2. Either LEFT or RIGHT is indicated.

*3. Value between 0.0 and 6.3 is indicated.
Move the reflector either to 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:

POSITION STANDARD

UPPER/LOWER SIDE	Below 2°
RIGHT/LEFT SIDE	Below 4°

HINT:

If the vehicle dimensions are correct, the values should be within the above standard value range. 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 headlamp 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.

Fig 9: Laser Cruise Divergence Data Menu (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.