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Home >> Lexus >> 2011 >> IS F V8-5.0L (2UR-GSE) >> Repair and Diagnosis >> Body and Frame >> Testing and Inspection >> Programming and Relearning >> Repair Instruction - Initialization >> Part 3

Part 3








INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

INITIALIZATION (Continued)

18. ROTATION ANGLE SENSOR VALUE INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION (Power steering system)
NOTE:
Clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point if any of the following has occurred:
- The power steering ECU has been replaced.
- The power steering gear assembly has been replaced.
- Steering effort differs between left and right.

(a) Inspection before calibration
(1) Turn the engine switch off.
(2) Connect the Techstream to the DLC3.
(3) Turn the engine switch on (IG).
(4) Turn the Techstream on.
(5) Check the IG power supply voltage on the Techstream. Enter the following menus: Chassis / EMPS / Data List.

EMPS





Standard voltage:
11 to 14 V
NOTE:
If the IG power supply voltage is less than 11 V, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.

(b) Rotation angle sensor calibration value clear, rotation angle sensor value initialization, and torque sensor zero point calibration.
NOTICE:
- If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTC before starting calibration.
- If DTC C1526 (Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor value cannot be initialized. Clear the DTC before starting initialization.
(1) Turn the engine switch off.
(2) Connect the Techstream to the DLC3.
(3) Turn the engine switch on (IG).
(4) Turn the Techstream on.
(5) Follow the procedures on the Techstream to clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point. Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.
NOTICE:
- When initializing the rotation angle sensor value, observe the following to stabilize sensor voltage:
After turning the engine switch on (IG), wait for at least 2.5 seconds before turning the steering wheel. Do not turn the steering wheel quickly.
- The steering wheel will vibrate during torque sensor zero point calibration. Do not touch the steering wheel while it is vibrating or for 2 seconds after it stops.

19. ZERO POINT CALIBRATION (Occupant classification system)
NOTE:
Make sure that the front passenger seat is not occupied before performing the operation.
HINT: Perform the zero point calibration if any of the following conditions is met:
- The occupant classification ECU is replaced.
- The passenger airbag ON/OFF indicator indicates OFF when the front passenger seat is not occupied.
- The vehicle is brought to the workshop for repair due to an accident or a collision.

(a) Zero point calibration procedures
(1) Check that all of the following conditions are met:

- The vehicle is parked on a flat surface.
- No objects are placed on the front passenger seat.
- The front passenger seat belt buckle switch is OFF.
(2) Adjust the seat position according to the table below.





(3) Connect the Techstream to the DLC3.
(4) Turn the engine switch on (IG).
(5) Enter the following menus: Body Electrical / Occupant Detection / Utility / Zero Point Calibration.
(6) Perform the zero point calibration by following the prompts on the Techstream screen.
HINT:
- Refer to the Techstream operator's manual for further details.
- If the zero point calibration is performed when the calibration conditions are not satisfied, DTC B1797 is output.
- If the zero point calibration has failed, DTC B1797 is output.
- If After Exchange is selected before the previous ECU data is stored in the Techstream, the display screen returns to CONDITION SELECT ECU: Occupant Detect.






20. SENSITIVITY CHECK (Occupant classification system)
(a) Sensitivity check procedures
(1) Turn the engine switch off.




(2) Place a 20 kg (44.0 lb) weight on the front passenger seat.
- Do not allow the weight to come into contact with the seatback when placing it on the seat cushion.
- Place the weight in the area shown in the illustration.
(3) Turn the engine switch on (IG), and wait for at least 6 seconds.
(4) Check that the passenger airbag ON/OFF indicator indicates OFF.
OK:
The passenger airbag ON/OFF indicator indicates OFF.
(5) Add a 30 kg (66.1 lb) weight to the front passenger seat (total 50 kg (110.2 lb)).
NOTICE:
- Do not allow the weight to come into contact with the seatback when placing it on the seat cushion.
- Place the weight in the area shown in the illustration.
(6) Check that the passenger airbag ON/OFF indicator indicates ON.
OK:
The passenger airbag ON/OFF indicator indicates ON.
21. INITIALIZATION (Pre-collision system) (Precautions for Seat Belt Control ECU Replacement)
The seat belt control ECU operates the pre-collision system based on the stored data that informs that the vehicle is LHD or RHD model. LHD or RHD refers to the seating position of the driver, not which side of the road the vehicle is driven on.
Therefore, when replacing the seat belt control ECU, it is necessary to store the information about whether the vehicle is a LHD or RHD model. This can be performed by following these steps:
(a) Turn the engine switch on (IG).
(b) The PCS warning light comes on for at least 3 seconds after turning the engine switch on (IG). Make sure that the warning light does not remain on.
(c) At this time, the seat belt control ECU receives vehicle configuration (LHD/RHD) information from the gateway ECU and stores it in memory.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG).
(3) Turn the Techstream on.
(4) Enter the following menus: Body Electrical / Pre-Collision / Active Test.
(5) Perform Active Test according to the display on the Techstream.

Pre-Collision





22. INITIALIZE POWER WINDOW CONTROL SYSTEM (POWER WINDOW REGULATOR MOTOR ASSEMBLY (ALL DOORS)) (Power window control system)
CAUTION:
When the power window regulator motor assembly is reinstalled or replaced, the power window control system must be initialized. Functions such as the auto up/down, jam protection, remote control and key-off operation do not operate if the initialization is not performed.
HINT: When the battery is replaced, it is not necessary to initialize the power window regulator motor assembly.
NOTICE:
- When the power window regulator motor assembly is replaced, DTC B2313 is output. Clear the DTC after the initialization.
- When performing initialization, do not perform any other procedures.
- After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the auto up function is used, due to detection of a value different from the operation learned value of the door glass movement speed. In such cases, the auto up function can be reinitialized by repeating the following operation at least 5 times:
1 Open the power window by fully pushing down the multiplex network master switch assembly or power window regulator switch assembly.
2 Close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly and holding it at the auto up position.
- If the initialization is not completed properly, the LIN communication line may have a malfunction.

(a) Initialization procedures when replacing the power window regulator motor assembly with a new one:
(1) Connect the battery and turn the engine switch on (IG) (at this time, the LED on the multiplex network master switch assembly or power window regulator switch assembly blinks to indicate that it is ready for initialization).
(2) Fully open the window by fully pushing down the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully opened.
(3) Fully close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully closed to reset the glass position. The LED on the multiplex network master switch assembly or power window regulator switch assembly stops blinking and illuminates to indicate that the initialization is complete.
(b) Initialization procedures when removing/installing the power window regulator motor assembly:
(1) Connect the battery and turn the engine switch on (IG).
(2) Fully close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 6 seconds or more after the window is fully closed (if the power window does not move or stops halfway even when the switch is fully pulled, release the switch and fully pull it again).
(3) Fully open the window by pushing down the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully opened.
(4) Release the multiplex network master switch assembly or power window regulator switch assembly. Then fully push down and hold the switch for 4 seconds or more.
(5) Fully close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully closed to reset the glass position and complete the initialization.
(c) Initialization procedures when the power window does not fully open:
(1) Connect the battery and turn the engine switch on (IG).
(2) Fully close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 6 seconds or more after the window is fully closed (if the power window does not move or stops halfway even when the switch is fully pulled, release the switch and fully pull it again).
(3) Fully open the window by pushing down the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully opened.
(4) Release the multiplex network master switch assembly or power window regulator switch assembly. Then fully push down and hold the switch for 4 seconds or more.
(5) Fully close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly, and hold the switch for 1 second or more after the window is fully closed to reset the glass position and complete the initialization.
23. INITIALIZE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (Sliding roof system)
NOTICE:
- When the sliding roof glass is replaced or removed and installed, or the sliding roof drive gear sub-assembly (sliding roof ECU) is replaced, the sliding roof drive gear requires initialization (pulse sensor initial position setting), as the glass position cannot be determined. If initialization is not performed, the auto slide open and close / tilt up and down function may not operate, or the sliding roof may move in reverse or become misaligned.
- During initialization, do not apply a physical shock, such as opening/closing a door or driving the vehicle at 5 km/h (3 mph) or more, to the vehicle and do not perform the following electrical operations:
1 Cranking the engine
2 Turning the engine switch from on (IG) to off
3 Operating the power window switches
4 Operating the window defogger switch
5 Operating the blower switch
6 Locking/Unlocking a door
7 Operating the headlight dimmer switch
HINT: When the cable is disconnected and reconnected to the negative (-) battery terminal or the drive gear connector is disconnected and reconnected, the sliding roof drive gear (pulse sensor initial position setting) initialization is not necessary.

(a) Perform initialization according to the table below.





HINT: Before performing initialization, make sure that there is no foreign matter on the guide rails and the guide rails are not deformed.
(1) Procedure A
1 Turn the engine switch on (IG).
2 Close the sliding roof to the fully closed position.
3 Press and hold the TILT UP switch to perform the following operations: tilt up -> approximately 1 second pause -> tilt down -> slide open -> slide close.
NOTE:
Make sure not to release the switch during the initialization. If the switch is released, perform the initialization again.

4 The initialization is completed.
(2) Procedure B
1 Turn the engine switch on (IG).
2 Press the TILT UP switch until the sliding roof stops.
HINT: If the glass becomes misaligned or does not fully tilt up, perform the following operations:

1 Operate the SLIDE CLOSE switch until the sliding roof stops moving.
2 Operate the TILT UP switch until the sliding roof stops moving, then proceed to the next step.

3 Release the switch.
4 Press the TILT UP switch for 10 seconds or more to perform the following operations: tilt up -> approximately 1 second pause -> tilt down -> slide open -> slide close.
NOTE:
Make sure not to release the switch during the initialization. If the switch is released, perform the initialization again.

5 The initialization is completed.
(3) Procedure C
1 Turn the engine switch on (IG).
2 Press and hold the SLIDE CLOSE switch to perform the following operations: slide close -> move in reverse direction -> 10 second pause -> slide close.
NOTE:
Make sure not to release the switch during the initialization. If the switch is released, perform the initialization again.

3 After the sliding roof stops in the fully closed position, release the switch.
4 Perform procedure A.
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