Part 4

INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION - Continued

50. 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.
NOTICE:
- 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 (32.8 ft.) x 14 m (45.9 ft.) area in front of the vehicle. If possible, the surrounding area should also be free of large metal objects.

(a) 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.).
(b) w/ Air Suspension:
Adjust the vehicle's height to the standard height.
(c) 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.

(3) Check that the level's air bubble is within the red frame.
OK:
Level's air bubble is within red frame.
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.
- The adjustable range within the level's red frame is +/-0.2°.
- The target angle is +0.2° (upward angle of 0.2°).
Result:

(d) Adjust the reflector height.
(1) Adjust the reflector so that the center of SST reflector is the same height as the millimeter wave radar sensor.
SST: 09870-60000
HINT: Prepare a 10 m (32.8 ft.) string, a string with a sharp-pointed weight (plumb bob), and a 5 m (16.4 ft.) tape measure.

(e) Place the reflector.

(1) Hang the string (with weight) from the center of the vehicle rear's emblem. Mark the vehicle rear's center point on the ground. Repeat for the front of the vehicle.
(2) Set one end of the 10 m (32.8 ft.) string on the vehicle rear's center point. Run the string over the vehicle front's center point to a position 5 m (16.4 ft.) beyond the vehicle front's center point, as shown in the illustration. Mark the 5 m (16.4 ft.) position.
(3) Using a tape measure, measure 12 mm (0.472 in.) to the left of the 5 m (16.4 ft.) position. Place the reflector at that position.
NOTE: Perform the operation as precisely as possible.

(f) Check the radar beam axis.
(1) When using intelligent tester:
1 Connect the intelligent tester to the DLC3.
2 Turn the power switch ON (IG).
3 Turn the intelligent tester main switch ON, and turn the cruise control main switch ON.
4 Follow the instructions on the screen menu. Select "RADAR CRUISE", then select "BEAM AXIS ADJ", and press "Enter".
5 Continue the procedure according to the instructions on the tester screen.
6 After the CRUISE main indicator light illuminates, press "ENTER".
HINT: A buzzer will sound for 1 second.
(2) When using Techstream:
1 Connect Techstream to the DLC3.
2 Turn the power 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 Under "System Selection Menu", select "Radar Cruise".
7 Select "Utility".
8 Select "Beam Axis Adjustment" and proceed to the next screen.
HINT: A buzzer will sound for 1 second.

9 Follow the tester display, and continue with the adjustment.
(3) Check the following items on the laser cruise divergence data screen.
NOTE: While using the intelligent tester's beam axis adjustment mode, the actual direction and angle of the radar sensor may be different from the intelligent tester's data. In such a case, the deviation is displayed on the combination meter's multi-information display.

1 Confirm that the distance value is approximately 5 m (16.4 ft.).
HINT:
- A value between 0.0 and 6.3 m (20.7 ft.) is indicated.
- If the distance is 0 m (0 ft.), the sensor cannot detect the target. Reconfirm that there is no metal in the specified area in front of the vehicle (refer to the NOTICE at the beginning of this adjustment procedure).

2 Confirm that the left/right side value is between 0.0 and 6.3.
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 in front of the vehicle (refer to the NOTICE at the beginning of this adjustment procedure).

(g) 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 axis 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.

- If "LEFT SIDE: 1.0°" is displayed, the divergence is 1.0° in the left direction. Turn bolt B approximately 18.6 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) Select "Next". The driving learning value is automatically reset.
HINT: A buzzer will sound for 10 seconds or more.
(4) Disconnect the intelligent tester or Techstream from the DLC3.
(h) Recheck and readjust the vertical direction of the radar sensor.

(1) Set a level on the radar sensor's level rack.

(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.
- The adjustable range within the red frame is +/-0.2°.
- The target angle is +0.2° (upward angle of 0.2°).
Result:

51. INITIALIZATION WITH DIAGNOSIS SYSTEM
(a) Start the diagnostic system.
(b) Perform STEERING CENTER MEMORIZE and MAX STEERING ANGLE MEMORIZE on the STEERING ANGLE SETTING screen.
(c) Finish the diagnostic system.
52. INITIALIZATION WITH MANUAL OPERATION
(a) Turn the power switch ON (IG) or start the hybrid control system.
(b) Fully turn the steering wheel to the right.*
(c) Fully turn the steering wheel to the left.*
HINT: *: These procedures can be performed as shown or in reverse.

53. SYSTEM ADJUSTMENT
(a) If the following operations are performed, the adjustments shown below are required.

HINT: If the parking assist ECU is replaced, screen noise adjustment is automatically performed when steering angle setting and camera position setting are performed.

54. PREPARATION FOR ADJUSTMENT

HINT: Only when adjusting the optical axis of the camera, set the target bar for adjustment.

(a) Park the vehicle with its wheels facing straight ahead and the steering wheel centered.
(b) Set the target bar for adjustment.
HINT:
- Adjust the tire pressure to the specification.
- The target bar for adjustment is a piece of tape attached to the floor. Check the color on the screen and choose a tape color which can be easily seen.
- Before parking the vehicle, move the vehicle back and forth to check that the wheels are facing straight ahead and that the steering wheel is centered.

55. BOOT DIAGNOSIS MODE
(a) Start the hybrid control system.
(b) Start the diagnostic system.
(c) Select "Camera Check" on the Diagnosis Menu.
56. SET VEHICLE HEIGHT
(a) At the "SIGNAL CHECK" screen, press "HT INIT" to display the "HEIGHT SET" screen.
HINT:
- Before performing the camera position setting, the vehicle height setting must be performed in the "HEIGHT SET" screen.
- If the vehicle height setting is not completed, the "HT INIT" display will change to "CHECKING".

(b) Measure the distance A between the ground and television camera in the illustration.

(d) Press "UP" and "DOWN" to input the calculated difference.

(e) After inputting the calculated difference, press "OK". The vehicle height setting will be recorded.
HINT:
- Press "OK" with the vehicle in the same condition as when the vehicle height was measured.
- If a person was in the driver's seat when the vehicle height was measured, press "OK" with the same person in the driver's seat.
- On the "SIGNAL CHECK" screen, check that the "HT INIT" display is "INPUT OK".

57. SET PARALLEL PARKING OFFSET

(a) Select "PARALLEL OFFSET" on the SIGNAL CHECK screen.

(b) Perform the parallel parking offset.
(1) Press the UP or DOWN switches to adjust.
HINT:
- Positive numbers are displayed in green. Negative numbers are displayed in red.
- When the value is changed in the "+" direction, the vehicle moves toward the road shoulder.

58. SET VOLUME

(a) Select "VOLUME" on the SIGNAL CHECK screen.

(b) Select the volume level on the VOLUME screen.
59. SET CAMERA POSITION SETTING

(a) Select the "NEXT" button on the SIGNAL MENU screen.
HINT: If DTC C1650 (5C-74) is output, pushing the "NEXT" button does not advance the screen to the CAMERA POSITION SETTING screen.

(b) Perform the roll angle adjustment.
(1) Press the directional switches to rotate the target adjustment bars.

(c) Perform the vertical and horizontal position adjustment.
(1) Press the directional switches to move the target adjustment boxes.

60. SET BUMPER POSITION

(a) Press the directional switches to move the target adjustment.

(b) If the right and left bumper need to be adjusted individually, press the "L/R" button on the BUMPER.

(c) Press the directional switches to move the target adjustment on the LEFT BUMPER and RIGHT BUMPER screen.

61. CHECK VERIFY MODE

(a) Check that A and the target adjustment bar are overlapping.
- If A and the target adjustment bar are not aligned even if the tires are aligned straight ahead, perform the CAMERA POSITION SETTING operation.

(b) Selecting "NEXT" will move to the STEERING ANGLE SETTING screen, and complete the adjustment.
HINT: The update is not completed until the "NEXT" key is pressed.

62. SET STEERING ANGLE SETTING

(a) Perform the STEERING CENTER MEMORIZE operation.
(1) Check that the steering wheel is centered, and then press "STEERING CENTER MEMORIZE".
- When performing removal and installation, or replacement of the television camera, steering angle adjustment is not required.
Press "OK" on the steering angle setting screen. However, the current steering angle is automatically stored as the steering angle neutral point when the steering angle setting screen is displayed. Make sure that the steering wheel is centered before changing the display to the steering angle setting screen.
- Even when storing the steering angle neutral point only, the system cannot store it unless the operation is completed by following the prompts from "NEXT" to "OK".

(b) Perform the MAX STEERING ANGLE MEMORIZE operation.
(1) After adjusting the steering angle neutral point, turn the steering wheel to the left and right lock positions and press "MAX STEERING ANGLE MEMORIZE". The maximum steering angle is then stored.
HINT: The key "OK" does not respond until the system stores the steering angle neutral point and maximum steering angle.

63. FINISH DIAGNOSIS MODE
(a) Turn the power switch OFF.
64. MAYDAY ECU INITIALIZATION
HINT: This procedure is for switching a new mayday ECU from the Factory Mode into Demo Mode.

(a) Turn the power switch from OFF to ON (IG) (engine does not have to be running).
(b) The mayday ECU will perform the Factory Mode Start Sequence for approximately 30 seconds.
HINT:
- In Factory Mode, for each power switch cycle OFF to ON (IG), or after checking or clearing DTCs, the ECU will perform a start sequence that includes a Japanese prompt and flashing LEDs (approximately 30 seconds). Then the LEDs will turn off. Do not push any buttons during this start sequence.
- If there is a DTC detected during this Factory Mode Start Sequence, after the start sequence, the red LED will remain on and a Japanese prompt will repeat 5 times. Do not press any buttons during these prompts.

(c) BUTTON SEQUENCE:
While pressing and holding the VOL+ button, press and release the PHONE button 5 times within 15 seconds, then release the VOL+ button. When switched to Demo Mode, each LED will flash one time then turn off (approximately 5 seconds).
(d) CONFIRMATION:
Confirm Demo Mode by pressing the SERVICES button and listening for the demo prompt "Hello and welcome to LEXUS Link." (the power switch must be ON (IG) for the SERVICES button to function). Additionally, after each power switch cycle OFF to ON (IG), the LEDs will each flash one time each. This start sequence takes approximately 5 seconds. If Demo Mode is not confirmed, repeat the initialization procedure.
HINT:
- Before troubleshooting a DTC, attempt to initialize the ECU into Demo Mode with the button sequence. Then access DTCs and troubleshoot the ECU in Demo Mode. If necessary, DTCs can still be accessed in Factory Mode. However, the 30 second Factory Mode Start Sequence (and the Japanese prompt, which will repeat 5 times if a DTC is set) will occur after each power switch cycle OFF to ON (IG), and after each DTC check or clear. Do not press any buttons during this start sequence.
- A red LED continuously on in any mode indicates that there is a current DTC set. Refer to the DTC chart.
- Do not push any buttons during any start sequences (LED flashing or voice prompts).