LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2009 >> LS 600hL >> Repair and Diagnosis >> General Information >> Identification >> Introduction >> Repair Instruction >> Initialization >> Variable Gear Ratio Steering System (Calibration) >> Using SST Check Wire
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Using SST Check Wire

NOTE:

Use this procedure to center the steering wheel if:

  • The steering actuator (power steering gear assembly) has been replaced.
  • The steering control ECU has been replaced.
  • The steering column or steering intermediate shaft has been disconnected.
  • The steering wheel is still off-center after completing the steering angle sensor initialization.
  1. FACE TIRES STRAIGHT AHEAD 
    NOTE:

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

    NEXT: Go to next step 

  2. CHECK DTC 
    1. Check for DTCs.
      RESULT

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

      B → Go to step   4 

      A: Go to next step 

  3. PERFORM ACTUATOR ANGLE INITIALIZATION 
    • SST: 09843-18040 
    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).
      Fig 1: Identifying DLC3 Connector Terminals
      GTY134062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Center the steering wheel.
    3. Using SST, connect terminals 12 (TS) and 4 (CG), and 13 (TC) and 4 (CG) of the DLC3. (*1)
    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.

      NEXT: Go to next step 

  4. 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

      B → Go to step   8 

      A: Go to next step 

  5. 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.
      Fig 2: Identifying Z16 Harness Connector Terminals
      GTY124619Courtesy 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.

      NEXT: Go to next step 

  6. 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.

      NEXT: Go to next step 

  7. 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.

      NEXT: Go to next step 

  8. 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.
      Fig 3: Identifying DLC3 Connector Terminals
      GTY155813Courtesy 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.

      NEXT: Go to next step 

  9. 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.

      NEXT: Go to next step 

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

      NEXT → END 

scientia non olet · About LEMON Manuals