Part 2

17. REGISTRATION (FOR OCCUPANT CLASSIFICATION SYSTEM)

NOTE:
- If any DTCs related to the occupant classification ECU are output, troubleshoot those DTCs by referring to the DIAGNOSTIC TROUBLE CODE CHART.
- When ECU data saving or loading operations cannot be performed, replace the front seat cushion (with occupant classification ECU and occupant detection sensor).

HINT:
- When the occupant classification ECU is replaced, the previous ECU data must be saved in the intelligent tester and loaded into the new ECU by following the flowchart.
- Until the data from the previous ECU are loaded into the new occupant classification ECU, these data are not erased even when the tester is turned off.
- ECU EXCHANGE procedure (Before Exchange) describes the procedure to save the data in the intelligent tester from the occupant classification ECU which has been installed on the vehicle. ECU EXCHANGE procedure (After Exchange) describes the procedure to load the data from the previous ECU, stored in the intelligent tester, into the new ECU.




a. Connect the intelligent tester (with CAN VIM) to the DLC3.
b. Turn the power switch ON (IG).
c. Store the occupant classification ECU data in the intelligent tester by following the prompts on the tester screen.

HINT: If the ECU data cannot be stored in the intelligent tester, replace the front seat cushion (with occupant classification ECU and occupant detection sensor).

d. Turn the power switch ON (IG).
e. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
f. Replace the occupant classification ECU.
g. Connect the negative (-) terminal cable to the battery.
h. Turn the power switch ON (IG).
i. Load the data from the previous ECU stored in the tester into the newly installed ECU by following the prompts on the tester screen.
j. Turn the power switch OFF.

HINT: If DTCs are not cleared at this time, past DTCs will remain.

k. Turn the power switch ON (IG).







l. Clear the DTCs stored in the memory.

18. INITIALIZE DISTANCE CONTROL ECU

NOTE: When replacing the distance control ECU, perform the following procedures so that the ECU can recognize the specification.

a. Be sure to perform the following procedures after replacing the distance control ECU.
1. Turn the power switch ON (IG).
2. Push the cruise main switch ON.
3. With the brake pedal depressed, push the cruise control main switch to RES/ACC 3 times within 3 seconds. Check that the VSC buzzer sounds this time.

NOTE: Do not turn the headlight dimmer switch on at this time because optical axis automatic adjustment mode has already started, which could lead to an incorrect optical axis setting. If the headlight dimmer switch is turned on by mistake, readjust the optical axis.

19. 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.






NOTE:
- 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 hexagon wrench to adjust screw A until the level's air bubble is within the red frame.






HINT:
- 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 the 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 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.

NOTE: Perform the operation as precisely as possible.

f. Adjust the radar beam axis.
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. Operate by following the screen menus. Select "BEAM AXIS ADJUST" of Radar Cruise Control, and then press the "ENTER" key.

HINT:
- Pressing the "ENTER" key will make the ECM transfer to BEAM AXIS ADJUST MODE.
- When the ECM transfers to BEAM AXIS ADJUST MODE, the buzzer sounds for 1 second.




5. Select "5: RADAR CRUISE".
6. Press the "ENTER" key.




7. Select "6: BEAM AXIS ADJUST".
8. Press the "ENTER" key.




9. Press the "ENTER" key.




10. Press the "ENTER" key.




11. After the CRUISE main indicator light illuminates, press the "ENTER" key.
12. Press the "ENTER" key.
13. Check that a distance of 5 m (16.41 ft.) is displayed on the tester.

HINT: If the distance is 0 m, the sensor cannot detect the target. Reconfirm that there is no metal in the surrounding area.

1. Check that a value between 0.0 and 6.3 is displayed in the meter display area A.




2. Check that a value between 0.0 and 20.67 is displayed in the feet display area B.
3. Check that LEFT or RIGHT is displayed in area C.
4. Check that an angle value between 0.0 and 6.3 is displayed in area D. While using the intelligent tester's BEAM AXIS ADJUST 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.

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 screw B until the divergence of the radar beam axis is 0°.







2. Based on the measured divergence of the beam axis, turn and adjust screw B for horizontal adjustment of the millimeter wave radar sensor using a hexagon wrench.

HINT:
- If "LEFT SIDE: 1.0°" is displayed, the divergence is 1.0° in the left direction. Turn screw B approximately 3 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. Reset the radar sensor's driving learning values.
4. Prepare a type of metal that can block radio waves, such as aluminum foil.
5. Cover the radar sensor's left half with the metal for 10 seconds.

NOTE: Be sure to keep the reflector in place and make sure that there is nothing between the sensor's left half and the reflector.


HINT: When the reset is completed, the buzzer sounds for 10 seconds.

6. Disconnect the intelligent tester 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 red frame. If the bubble is not within the red frame, use a hexagon wrench to adjust screw A until the level's air bubble is within the red frame.


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

20. REGISTRATION (FOR LEXUS LINK SYSTEM)






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.


a. LEXUS Link Operation Modes
1. Factory Mode
This is the default mode from the factory. In this mode, a Japanese prompt will play when the power switch is turned ON (IG). After any button is pressed, a voice prompt will play "System not initialized, a call cannot be placed."
2. Demo Mode (Dealer Mode)
A button sequence will initialize the Mayday ECU from Factory Mode into Demo Mode. In Demo Mode, pressing the SERVICES button will play the voice prompt "Hello and welcome to LEXUS Link. For LEXUS Link services, contact a LEXUS Link advisor by pressing the SERVICES button again. For additional information, visit us online at Lexus.com in the owner section or talk to your LEXUS dealer." Pressing the SERVICES button again during this voice prompt will place an enrollment call to the LEXUS Link call center.

HINT:
- See "MAYDAY ECU INITIALIZATION" for the button sequence to switch the ECU from Factory Mode into Demo Mode.
- If the ECU will not switch from Factory Mode to Demo Mode, and there are no prompts played when pushing any buttons, the ECU may have been inadvertently placed into an Engineering Mode. In this case, perform this button sequence to switch the ECU back into Factory Mode. While pressing and holding the VOL-button, press the SERVICES button 5 times within 15 seconds, then release both buttons. The ECU will perform a Factory Mode Start Sequence as described under "MAYDAY ECU INITIALIZATION".

3. Active Mode
The LEXUS Link call center will configure this mode automatically after customer enrollment.

4. De-active Mode
The LEXUS Link call center will configure this mode automatically after an enrollment expires. The SERVICES button will operate the same as in Demo Mode. Therefore, the customer can push it twice to contact the LEXUS Link call center for re-enrollment.

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 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. Press the SERVICES button when the Mayday ECU is set normally and confirm that the demo message is provided. "Hello and welcome to LEXUS Link..." If the message is not provided, perform the "MAYDAY ECU INITIALIZATION BUTTON SEQUENCE" again.
2. 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.
3. 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 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 of LED flashing to complete. Do not press any buttons during this start up sequence.
(Note that Demo Mode and active enrolled ECUs have approximately a 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.)
2. 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.
3. 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). 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 activity enrolled).

e. MAYDAY BATTERY CONFIRMATION
1. After replacement check: If the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" has been completed, 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.

NOTE: 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.

21. PERFORM INITIAL SETTING OF STEERING ANGLE MID-POINT AND MAXIMUM STEERING ANGLE






HINT: The mid-point learning operation (steering angle midpoint, maximum steering angle) can be performed using 4 methods:

a. Method 1 (Intelligent tester)
1. Turn the power switch OFF.
2. Connect the intelligent tester to the DLC3.
3. Turn the power switch ON (IG) and push the intelligent tester main switch ON.
4. Select the menus: "DIAGNOSIS / OBD".




5. Perform the STEERING INIT procedure from the INTUITIVE P/A menu.







b. Method 2 (Manual operation method)
1. Using customize mode, set the mid- point and maximum steering angle.

c. Method 3 (Manual operation method)
1. Turn the power switch ON (IG).
2. Turn the clearance sonar main switch ON.
3. Turn the steering wheel to the full left and right lock position.

NOTE: Make sure to completely turn the steering wheel to the left and right full lock position.

d. Method 4 (Manual operation method)
1. At an area with few turns and curves, and minimal traffic, drive at 20 km/h (12 mph) or more for 5 minutes or more.

22. RESET (INITIALIZE) POWER WINDOW REGULATOR MOTOR

NOTE: Resetting the power window regulator motor (initializing the pulse sensor) is necessary if: 1) the battery terminal cable is disconnected; 2) the power window regulator master switch, wire harness, power window regulator switch, window regulator, and power window regulator motor are replaced or removed / installed; 3) the D/C CUT or MPX- B fuses are replaced. If resetting is not performed, the multiplex network (master) switch will not be able to operate the AUTO operation function and jam protection function; and the multiplex network master switch will not be able to operate the remote UP / DOWN function.

a. Turn the power switch ON (IG).
b. Open the power window halfway by pressing the power window switch.
c. Fully pull the switch up until the power window is fully closed and continue to hold the switch for at least 1 second.
d. Check that the AUTO UP / DOWN function operates normally.

HINT: If the AUTO UP / DOWN function operates normally, reset operations are completed. If abnormal, perform the following 3 steps.

e. Disconnect the cable from the negative (-) battery terminal for 10 seconds or more.

CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

f. Reconnect the cable.
g. Perform initialization from the first 4 steps again.

HINT: If a condition where an initialization is necessary occurs (see 1), 2) and 3) above), the initialization procedures above are performed, but the remote UP / DOWN function does not operate, the power window regulator master switch may have a malfunction.

23. RESET SLIDING ROOF SYSTEM

NOTE: When replacing the sliding roof drive gear or sliding roof related parts, the sliding roof drive gear requires initialization. If a reset is not executed, the following functions do not operate: auto operation, jam protection function, key off operation, key-linked open and close, and transmitter-linked open and close.

a. Turn the power switch ON (IG).
b. If the sliding roof is opened, close it fully.

c. Push the SLIDE CLOSE switch or TILT UP switch, making the sliding roof operation as follows:
Tilt up -> Approximately 1 second -> tilt down -> slide open -> slide close

d. Sliding roof stops at the fully closed position.
e. Finish the initialization.
f. Check that the operation works normally with AUTO operation.

NOTE: If the following conditions occur while operating, initialization will fail.
- Power switch is turned OFF.
- Pushed switch is released while sliding roof is operating.
- Vehicle speed is 5 km/h (3 mph) or higher.
- Battery of sliding roof ECU is 1 V or higher.
- Communication is cut off.

HINT:
- If the sliding roof cannot fully close or its position has become misaligned, perform the initialization again.
- If the sliding roof TILT UP switch or SLIDE CLOSE switch is pressed and held until the roof glass has either stopped moving or started moving in the opposite direction, and then the switch is held for another 10 seconds or more, perform the initialization again.
- If the AUTO operation function and jam protection function do not operate after the drive gear has been reset, replace the sliding roof drive gear (sliding roof ECU).