Part 5

INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

INITIALIZATION (Continued)

21. 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 (7.9 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 (32.81 ft.) x 14 m (45.93 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°).










(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 (32.81 ft.) string, a string with a sharp-pointed weight (plumb bob), and a 5 m (16.41 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 (32.82 ft.) string on the vehicle rear's center point. Run the string over the vehicle front's center point to a position 5 m (16.41 ft.) beyond the vehicle front's center point, as shown in the illustration. Mark the 5 m (16.41 ft.) position.
(3) Using a tape measure, measure 12 mm (0.47 in.) to the left of the 5 m (16.41 ft.) position. Place the reflector at that position.
NOTICE:
Perform the operation as precisely as possible.





(f) Check the radar beam axis.
(1) 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 next screen.
HINT: A buzzer will sound for 1 seconds.

9 Follow the tester display, and continue with the adjustment.
(2) Check the following items on the laser cruise divergence data screen.
NOTICE:
While using the Techstream beam axis adjustment mode, the actual direction and angle of the radar sensor may be different from the Techstream 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 hexagon wrench 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 hexagon wrench.





- 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.
(4) Disconnect the 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 hexagon wrench 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°).






22. ADVANCED PARKING GUIDANCE SYSTEM (INITIALIZATION)
HINT:
- If the following operations are performed "SYSTEM INITIALIZING" is displayed on the multi-display. Also, when the expected course lines not displayed the parking guidelines are displayed, pressing the parking assist mode switch and parallel parking assist mode switch causes the message "! System cannot guide under current conditions." to be displayed.





- Move the vehicle to a level area.
- Perform either of the following initialization procedures.

(a) Initialization with diagnosis system
(1) Start the diagnostic system.
(2) Perform STEERING CENTER MEMORIZE and MAX STEERING ANGLE MEMORIZE on the STEERING ANGLE SETTING screen.
(3) Finish the diagnostic system.
(b) Initialization with manual operation
(1) Turn the power switch ON (IG) or start the hybrid control system.
(2) Fully turn the steering wheel to the right.*
(3) Fully turn the steering wheel to the left.*
HINT: *: These procedures can be performed as shown or in reverse.

23. ADVANCED PARKING GUIDANCE SYSTEM (CALIBRATION)
(a) SYSTEM ADJUSTMENT
(b) 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.

(c) PREPARATION FOR ADJUSTMENT




HINT: Only when adjusting the optical axis of the camera, set the target bar for adjustment.
(1) Park the vehicle with its wheels facing straight ahead and the steering wheel centered.
(2) 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.

(d) BOOT DIAGNOSIS MODE
(1) Start the hybrid control system.
(2) Start the diagnostic system.
(3) Select "Camera Check" on the Diagnosis Menu.
(e) SET VEHICLE HEIGHT
(1) 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".
(2) Measure the distance A between the ground and television camera in the illustration.




(3) Calculate the difference between the distance A and the standard height below.
Standard:
944 mm (37.2 in.)




(4) Press "UP" and "DOWN" to input the calculated difference.
(5) 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".

(f) SET PARALLEL PARKING OFFSET




(1) Select "PARALLEL OFFSET" on the SIGNAL CHECK screen.
(2) 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.

(g) SET VOLUME




(1) Select "VOLUME" on the SIGNAL CHECK screen.
(2) Select the volume level on the VOLUME screen.
(h) SET CAMERA POSITION SETTING




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




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

(i) SET BUMPER POSITION




(1) Press the directional switches to move the target adjustment.
(2) If the right and left bumper need to be adjusted individually, press the "L/R" button on the BUMPER.




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

(j) CHECK VERIFY MODE




(1) 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.
(2) 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.

(k) SET STEERING ANGLE SETTING




(1) 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".
(2) 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.

(l) FINISH DIAGNOSIS MODE
(m) Turn the power switch OFF.
24. LEXUS LINK SYSTEM
(a) MAYDAY ECU INITIALIZATION
HINT:
- Turn the power switch OFF and disconnect the vehicle battery before replacing the mayday ECU (together with mayday battery) or when just replacing the mayday battery.
- Historic DTCs may be set if the vehicle battery is not disconnected during ECU installation/replacement.
- The mayday ECU estimates the remaining power of the mayday battery based on the mayday battery usage time.






(b) MAYDAY ECU INITIALIZATION
HINT: This procedure is for switching a new mayday ECU from the Factory Mode into Demo Mode.
(1) Turn the power switch from OFF to ON (IG) (engine does not have to be running).
(2) 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.
(3) 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).
(4) 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).

(c) MAYDAY ECU REGISTRATION / ENROLLMENT
(1) Turn the power switch ON (IG) and wait for the 5 second LED flash start sequence.
(2) Press the SERVICES button when the mayday ECU is set normally and confirm that the following demo message is provided.
"Hello and welcome to LEXUS Link."
If the message is not provided, perform the "MAYDAY ECU INITIALIZATION BUTTON SEQUENCE" again.
(3) As the message states, press the SERVICES button again during the prompt to connect to the LEXUS Link call center.
HINT: Usually this call will connect within 15 to 30 seconds. However, it may take several minutes depending on cellular service in the area. A progression tone (i.e., beep) will be heard every 5 seconds to indicate that the connection attempt is in progress.
(4) A LEXUS Link call center advisor will answer and instruct the technician on how to register/enroll the new mayday ECU. The ESN, STID and VIN may be required at this time.
HINT:
- If the LEXUS Link call center cannot be reached after several attempts using the SERVICES button, or a cell tower message is heard, such as "Welcome to Verizon Wireless, your phone is not active at this time.", call the LEXUS Link call center by pushing the EMERGENCY button.
- The LED flash start sequence (approximately 5 seconds) after the power switch is cycled or after checking/clearing DTCs remains present after enrollment. A green LED continuously on after this sequence indicates that the LEXUS Link System is activity enrolled.

(d) MAYDAY BATTERY REGISTRATION
HINT:
- This procedure is required to register a new mayday battery and clear DTC 6-1. This procedure matches the new mayday battery with the new or used ECU.
- A new mayday ECU always requires a new mayday battery (used mayday batteries should not be reused in a new ECU).
- If the new replacement ECU is packaged and already connected to the new mayday battery when it arrives from the factory, and current DTC 6-1 is not set, do not perform the new mayday battery registration (the battery is already registered to the ECU that it is connected to).
(1) Turn the power switch from OFF to ON (IG) and wait for the start up sequence
(2) of LED flashing to complete. Do not press any buttons during this start up sequence.
(Note that Demo Mode and active enrolled ECUs have an approximately 5 second LED flashing start sequence. Factory Mode has approximately 30 seconds of LED flashing with a Japanese voice prompt. Also note if a current DTC is set in Factory Mode after this start sequence. This can be confirmed if the red LED remains on and an additional Japanese prompt repeats 5 times.)
(3) BUTTON SEQUENCE:
Press and hold the PTT button while completing the following sequence of button presses.
VOL+, VOL+, VOL-, VOL-, VOL+, VOL+, VOL-, VOL-, VOL+, VOL+, VOL-, VOL-
Release all buttons. This button press sequence should be performed within 15 seconds.
(4) The system will then perform the same start sequence as described above. After this start sequence completes, cycle the power switch to OFF then ON (IG).
(5) Wait for the start sequence to complete. The new mayday battery is now registered to the mayday ECU and DTC 6-1 should be cleared.
HINT: The mayday battery registration can be done in any mode (Factory Mode, Demo Mode or active enrolled).

(e) MAYDAY BATTERY CONFIRMATION
(1) After mayday battery replacement and completion of the "MAYDAY BATTERY REGISTRATION
(2) BUTTON SEQUENCE", turn the power switch OFF and ON (IG), and wait for the start sequence described in the "MAYDAY BATTERY REGISTRATION". Then check that current DTC 6-1 is cleared.
NOTICE:
If the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" has not been completed correctly, current DTC 6-1 will continue to be detected even if the mayday battery is replaced with a new one. In this case, check to be sure the old battery is removed and the new battery is installed. Then perform the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" again.