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Home >> Lexus >> 2016 >> LS 600h >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Variable Gear Ratio Steering System - Diagnostics - Introduction >> Variable Gear Ratio Steering System >> Calibration [09/2015 - ] >> Procedure

Calibration [09/2015 - ]: Procedure

  1. VGRS SYSTEM CALIBRATION PROCEDURE 

    Result

    Proceed to
    USING SST CHECK WIRE
    USING TECHSTREAM

    Result:  2

    USING TECHSTREAM 

    See step  12

    Result:  1

    USING SST CHECK WIRE 

    See step  2

  2. FACE TIRES STRAIGHT AHEAD 
    NOTE:

    Drive the vehicle to confirm that the steering wheel is centered.

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    See step  3

  3. CHECK DTC 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2015 - ] 

      Result

      Result Proceed to
      DTC C1591/51 is not output A
      DTC C1591/51 is output B

    Result:  2

    B 

    See step  5

    Result:  1

    A 

    See step  4

  4. PERFORM ACTUATOR ANGLE INITIALIZATION 
    NOTE:

    If the procedures from *1 to *2 are not completed within 1 minute, or if errors are made during these procedures, perform the initialization again from the beginning.

    1. Turn the power switch ON (READY).
    2. Center the steering wheel.
      GTY276837Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using SST, connect terminals 12 (TS) and 4 (CG), and 13 (TC) and 4 (CG) of the DLC3. (*1)
      • SST: 09843-18040 
    4. Disconnect SST from terminal 12 (TS) of the DLC3, and turn the steering wheel to the left 180° or more.
    5. Connect SST to terminal 12 (TS) of the DLC3.
    6. Disconnect SST from terminal 13 (TC) of the DLC3, and turn the steering wheel to the right 180° or more.
    7. Connect SST to terminal 13 (TC) of the DLC3. (*2)

      HINT: 

      When the master warning light comes on, DTC C1591/51 is memorized.

    8. Disconnect SST from the DLC3.
    9. Turn the power switch OFF.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  5

  5. FACE TIRES STRAIGHT AHEAD 
    1. Confirm that the steering wheel is centered when facing the tires straight ahead.
      NOTE:

      Drive the vehicle to confirm that the steering wheel is centered.

      Result

      Result Proceed to
      Steering wheel is off-center A
      Steering wheel is centered B

    Result:  2

    B 

    See step  9

    Result:  1

    A 

    See step  6

  6. UNLOCK STEERING ACTUATOR 
    NOTE:

    Do not turn the power switch ON (READY).

    1. Turn the power switch OFF.
    2. Disconnect the negative (-) terminal cable from the auxiliary battery.
    3. Disconnect the z16 connector from the steering actuator.
      GTY653373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect a jumper wire from terminal LV to the positive (+) 12 V battery terminal and another jumper wire from terminal LG to the negative (-) 12 V battery terminal.
      NOTE:

      Do not apply voltage for more than 3 minutes.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  7

  7. STEERING CENTER ADJUSTMENT 
    1. Center the steering wheel.
      NOTE:

      If the centering of the spiral cable was not confirmed when the steering wheel was installed, confirm the centering of the spiral cable.

      Refer to INSTALLATION [09/2015 - ]

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  8

  8. LOCK STEERING ACTUATOR 
    1. Disconnect the positive (+) and negative (-) 12 V battery terminal cables from the steering actuator.
    2. Connect the z16 connector to the steering actuator.
    3. Connect the negative (-) terminal cable to the auxiliary battery.
    4. Turn the steering wheel approximately 3° to the left and right. Confirm that the reaction force can be felt.
      NOTE:
      • If the above procedures are not followed correctly, a DTC will be detected. If a DTC is detected, perform the above procedures again and then check for DTCs.
      • Perform these procedures with the power switch OFF.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  9

  9. ADJUST ACTUATOR ANGLE 

    HINT: 

    Activating and ending test mode will complete actuator angle adjustment.

    1. Make sure the power switch is OFF.
      NOTE:

      Do not touch the steering wheel during these procedures.

    2. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
      GTY235975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09843-18040 
    3. Turn the power switch ON (IG).
    4. Confirm that the "VGRS TEST MODE" is displayed on the multi-information display when test mode is activated.

      HINT: 

      Wait approximately 5 seconds.

    5. Turn the power switch OFF.
    6. Disconnect SST from terminals 12 (TS) and 4 (CG) of the DLC3.
    7. Turn the power switch ON (IG) again.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  10

  10. CHECK MASTER WARNING LIGHT 
    1. Confirm that the master warning light is off.
    2. Turn the power switch OFF, then ON (IG).
    3. Confirm that the master warning light is operating normally.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  11

  11. CHECK STEERING WHEEL OPERATION 
    1. Turn the power switch ON (READY).
    2. Perform the steering angle sensor initialization.

      Refer to INITIALIZATION [09/2015 - ] 

    3. Turn the steering wheel from lock to lock and check that it rotates approximately 2.7 turns.
    4. Drive the vehicle and confirm that the steering wheel is centered.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    END 

  12. FACE TIRES STRAIGHT AHEAD 
    NOTE:

    Drive the vehicle to confirm that the steering wheel is centered.

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    See step  13

  13. PERFORM VGRS SYSTEM CALIBRATION 
    1. Connect Techstream to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / VGRS / Utility / Steering Angle Adjust.
    5. Perform the following procedures displayed on the Techstream.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  14

  14. CHECK MASTER WARNING LIGHT 
    1. Confirm that the master warning light is off.
    2. Turn the power switch OFF.
    3. Disconnect the Techstream from the DLC3.
    4. Turn the power switch ON (IG).
    5. Confirm that master warning light is operating normally.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  15

  15. CHECK STEERING WHEEL OPERATION 
    1. Turn the power switch ON (READY).
    2. Perform the steering angle sensor initialization.

      Refer to INITIALIZATION [09/2015 - ] 

    3. Turn the steering wheel from lock to lock and check that it rotates approximately 2.7 turns.
    4. Drive the vehicle and confirm that the steering wheel is centered.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    END 

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