Laser Sensor: Adjustment

WARNING: This page is about a different car, the 2008 Toyota Sequoia. 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 the operation is not carried out as specified, there may be a risk of exposure to hazardous radiation.

Fig 1: Locating Laser Radar Sensor Nuts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 INITIALIZATION ).
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 INITIALIZATION ).
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, and other related parts 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 it is impossible to secure a distance of approximately 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.

Fig 2: Adjusting Laser Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Preparation for adjusting the laser beam axis
1. Adjust the tires pressure properly (See INSPECTION ).
  NOTE: Refer to the tire pressure information label located in the door jamb for proper tire inflation or refer to the Owner's Manual.
2. Make sure that the trunk and passenger compartment is unloaded.
3. Clean the light-emitting and light-receiving portions of the laser sensor.
4. Prepare a 10 m (33 ft) string, a 1.5 m (5 ft) string with a sharp-pointed weight, and a standard tape measure at least 5 m (16.4 ft) in length.
Reflector (SST) placement

Fig 3: Identifying Reflector Length
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Measure the height to the center of the laser luminous portion.
2. Adjust the center height of the reflector (SST P/N: 09870-60000) 9 mm (0.35 in.) higher than the measurement taken for the center of the luminous portion of the laser sensor.
  SST 09870-60000
  
  NOTE: Adjust it as precise as possible.
3. From the center of the front and rear bumpers, hang down the sharp-pointed weight and mark the center points of the vehicle on the ground (both front and rear).
4. Attach one end of the string to the rear center mark and adjust the other end so that the string will line up with the front center mark of the vehicle. Make a mark 5 m (16.41 ft) from the front of the vehicle on the center line.
  
  Fig 4: Identifying Plumb Bob And Mark Center Points
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Place the reflector 478 mm to the left of the vehicle center line, 5 m from the front of the vehicle.
  
  Fig 5: Identifying Marked Position To Reflector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Perform it as precisely as possible.
Laser Cruise Flag (L/C Option Flag) Setting Procedure
1. Connect TIS Techstream to DLC3 and turn the power "ON."
2. Operate by following the screen menus and select "DATA LIST" from the Laser Cruise Menu and then press "ENTER."
3. Review the Data List setting for "L/C OPTION FLAG."
4. If the "L/C OPTION FLAG" is set to "YES," please proceed to the Adjustment Procedure.
5. If the "L/C OPTION FLAG" is set to "NO," perform the following option selection procedure:
  - Turn the ignition switch to the "ON" position.
  - Turn the cruise control switch to the "ON" position.
  - Depress, and hold, the brake pedal.
  - Cycle the cruise control switch to the "Resume/Accel" position 3 times within 3 seconds.
    NOTE: A beep sound will be heard from the vehicle when the "L/C OPTION FLAG" selection has been performed correctly.
6. Once the "L/C Option Flag" selection has been performed correctly, verify that the Data List display shows the "L/C OPTION FLAG" set to "YES."
  NOTE:
  - If the "L/C Option Flag" is NOT set to "YES" in the Data List after performing the "L/C OPTION FLAG" selection procedure and the beep is heard, perform the "INITIALIZATION" option from the "LASER CRUISE" menu on TIS Techstream.
  - Once TIS Techstream has completed the initialization procedure, perform the "L/C OPTION FLAG" selection procedure again as indicated above.

Laser Beam Axis Adjustment Procedure

Turn the headlight switch to the "OFF" position.
Turn the ignition switch to "ON."
Push the cruise control main switch button "ON."
Connect TIS Techstream to DLC3 and turn the power "ON."
NOTE: The headlight switch must be in the "OFF" position before performing beam axis adjustment. If the light switch is in the "TAIL," "HEADLIGHT" or "AUTO" position, the beam axis adjustment may fail.
Select Connect to Vehicle.
Under System Selection Menu in the System Select tab, select Laser Cruise.
Select Utility.
Select Beam Axis Adjustment and proceed to the next screen.
Follow the TIS Techstream display, and continue with the adjustment.
1. Check that Upper Side or Lower Side is displayed in area A.
2. Check that Left Side or Right Side is displayed in area B.
3. Check that an angle value between 0.0 and 6.3 is displayed in area C.
Move the reflector either to the right or left by approximately 100 mm (4 in.), and check that both the "UPPER/LOWER SIDE" and the "LEFT/RIGHT SIDE" values are changing.
NOTE:
When the angle 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 other than the target.
- Check the installation condition of the laser radar sensor and bumper reinforcement. Frontal damage to the vehicle may affect sensor aim.
- Move the reflector closer to the vehicle and from left to right until the angle values begin to fluctuate. Note the position in which the angle values began to fluctuate and recheck the installation of the laser radar sensor.

Return the reflector to the previously measured position and read the current angle. The Divergence values should be within the standard values listed below.

Standard Values for Divergence:

STANDARD CHART

Display	Angle
Upper/Lower Side	Below 2.7°
Right/Left Side	Below 4.0°

NOTE: If values are 0.0, it may be difficult to confirm when adjustment is completed. Go to 15.

If the values are NOT within the Divergence range shown above or the values are not displayed, it is not possible to operate Beam Axis Adjustment. In this case, mechanically adjust the direction of the radar sensor by adjustment bolts A and B to make the values within the standard value ranges.

Fig 7: Identifying Adjustment Bolt
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the headlight dimmer switch from the OFF position to the TAIL position (e.g., parking, tail license plate, side marker, and instrument panel lights) while the "LASER CRUISE DIVERGENCE DATA" screen is still shown on the Techstream.
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/Lower Side and Left/right Side flash alternately on the screen.
NOTE: If the angle indicators do NOT show "0" and the system beep is NOT heard, verify that the current divergence angles are within the Standard Values for Divergence listed in the table in step 12. If the value is out of range, go to step 1 and repeat the adjustment procedure.

Fig 8: Screen Display - Laser Cruise Divergence Data
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Select "NEXT" on Techstream to complete the adjustment procedure.

Mechanical adjustment method

Adjust the direction of the radar with adjustment bolts A and B until the values are between 0.0 and the Standard Values for Divergence shown in step 12. Move the reflector from the default position as necessary (Upper/Lower, Right/Left) to find the reflector position where the current angle can be read using the Techstream. Adjust the direction of the reflector in the inverse of the direction moved by adjustment bolts A and B until the values are within the standard value ranges.

Fig 9: Identifying Radar With Adjustment Bolts

Adjustment

ANGLE ADJUSTMENT

Adjust Direction	Adjust Method	Adjust Angle
Upper	Rotate adjustment bolt B in (+) direction	0.75 turn changes the angle 1°
Lower	Rotate adjustment bolt B in (-) direction	0.75 turn changes the angle 1°
Left	Rotate adjustment bolts A and B in (-) direction	4.5 turns changes the angle 1°
Right	Rotate adjustment bolts A and B in (+) direction	4.5 turns changes the angle 1°