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Home >> Lexus >> 2021 >> LC 500 2D Convertible >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Service Information (Convertible) (1 Of 2) >> Spiral Cable >> Installation [05/2023 - ] >> Procedure

Installation [05/2023 - ]: Procedure

  1. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY 
    1. Check that the spiral cable with sensor sub-assembly is center position.

      OK

      The connector is at the top.

      The matchmarks are aligned.

      The colored roller or the top of the flat cable U-turn can be checked from the check window.

      GTY792524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Colored Roller (Visible Type) *B Flat Cable (Visible Type)
      *a Check Window *b Matchmark
      *c Colored Roller *d Top of Flat Cable U-turn
    2. If the spiral cable with sensor sub-assembly is not centered, center it.
      NOTE:

      Failure to observe the following precautions may result in damage to the spiral cable with sensor sub-assembly.

      • When rotating the spiral cable with sensor sub-assembly, make sure to push on the interlock to release the interlock.
      • Do not turn the spiral cable with sensor sub-assembly using the airbag wire harness.
      • Do not forcibly rotate the part.
      1. GTY793014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Counterclockwise

        While pushing on the interlock indicated in the illustration. Make sure to rotate the spiral cable with sensor sub-assembly counterclockwise slowly by hand until it stops.

        NOTE:

        Make sure to rotate the spiral cable with sensor sub-assembly counterclockwise. If rotated clockwise, it may be damaged or centering may no longer be possible.

        HINT: 

        The interlock operates at the top and bottom of the connector.

      2. GTY811541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the spiral cable with sensor sub-assembly stops rotating and the connector has moved past the bottom, return the connector to the bottom as shown in the illustration.

      3. GTY785328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Counterclockwise

        While pushing on the interlock, rotate the spiral cable with sensor sub-assembly clockwise approximately 2.5 times to move the connector from the bottom to the top.

        NOTE:

        If the connector is rotated clockwise from the bottom 5 times or more, the spiral cable with sensor sub-assembly may be damaged.

        HINT: 

        The interlock operates at the top and bottom of the connector.

      4. Check that the spiral cable with sensor sub-assembly is center position.

        OK

        The connector is at the top.

        The matchmarks are aligned.

        The colored roller or the top of the flat cable U-turn can be checked from the check window.

        GTY792523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *A Colored Roller (Visible Type) *B Flat Cable (Visible Type)
        *a Check Window *b Matchmark
        *c Colored Roller *d Top of Flat Cable U-turn
        NOTE:

        If the spiral cable with sensor sub-assembly cannot be centered, it is possible that the spiral cable sub-assembly is broken. Replace the spiral cable sub-assembly with a new one.

  2. INSTALL STEERING SENSOR 
    1. Attach the guide and claw to install the steering sensor to the spiral cable sub-assembly.
      GTY810218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock Pin
      *b Guide
      NOTE:
      • Do not remove the lock pin before the spiral cable sub-assembly is installed to the steering sensor.
      • Do not damage the pins of the spiral cable sub-assembly or guides of the steering sensor.
      • The spiral cable sub-assembly can be rotated up to 30° even when the interlock is attached. Therefore, make sure that both guides are aligned properly when installing the spiral cable sub-assembly to the steering sensor.
    2. Remove the lock pin from the steering sensor.
  3. PLACE FRONT WHEELS FACING STRAIGHT AHEAD 
  4. INSTALL SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY 
    NOTE:
    • Do not replace the spiral cable with sensor sub-assembly with the battery connected and the engine switch on (IG).
    • Do not rotate the spiral cable with sensor sub-assembly with the battery connected and the engine switch on (IG).
    • When rotating the spiral cable with sensor sub-assembly to check the operation of the spiral cable with sensor sub-assembly (checking for abnormal noise, checking the DTC, Data list, etc.) make sure to perform the inspection with the steering wheel assembly installed.
    1. Check that the engine switch is off.
    2. Check that the cable is disconnected from the negative (-) battery terminal.
      WARNING:
      • Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
      • If the airbag deploys for any reason, it may cause a serious accident.
    3. Check that the front wheels are facing straight ahead.
    4. Set the turn signal switch to the neutral position.
      NOTE:

      If it is not in the neutral position, the turn signal switch cancel ratchet may snap.

    5. Attach the claw and clip to install the spiral cable with sensor sub-assembly.
      GTY792236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Connect each connector.
      NOTE:

      When connecting any airbag connector, take care not to damage the airbag wire harness.

      HINT: 

      Refer to How to Connect or Disconnect Airbag Connector:

      Refer to HOW TO CONNECT OR DISCONNECT AIRBAG CONNECTOR [05/2023 - ]

  5. INSTALL UPPER STEERING COLUMN COVER 

    Refer to PROCEDURE - Step 16

  6. INSTALL LOWER STEERING COLUMN COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 17

  7. ADJUST SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY 
    1. Check that the engine switch is off.
    2. Check that the cable is disconnected from the negative (-) battery terminal.
      WARNING:
      • Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
      • If the airbag deploys for any reason, it may cause a serious accident.
    3. Check that the spiral cable with sensor sub-assembly is center position.

      OK

      The connector is at the top.

      The colored roller or the top of the flat cable U-turn can be checked from the check window.

      GTY835069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Colored Roller (Visible Type) *B Flat Cable (Visible Type)
      *a Check Window *b Colored Roller
      *c Top of Flat Cable U-turn - -
    4. If the spiral cable with sensor sub-assembly is not centered, center it.
      NOTE:

      Failure to observe the following precautions may result in damage to the spiral cable with sensor sub-assembly.

      • When rotating the spiral cable with sensor sub-assembly, make sure to push on the interlock to release the interlock.
      • Do not turn the spiral cable with sensor sub-assembly using the airbag wire harness.
      • Do not forcibly rotate the part.
      1. While pushing on the interlock indicated in the illustration. Make sure to rotate the spiral cable with sensor sub-assembly counterclockwise slowly by hand until it stops.
        NOTE:

        If the connector is rotated clockwise from the bottom 5 times or more, the spiral cable with sensor sub-assembly may be damaged.

        HINT: 

        The interlock operates at the top and bottom of the connector.

        GTY813072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Counterclockwise
      2. If the spiral cable with sensor sub-assembly stops rotating and the connector has moved past the bottom, return the connector to the bottom as shown in the illustration.
        GTY778561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. While pushing on the interlock, rotate the spiral cable with sensor sub-assembly clockwise approximately 2.5 times to move the connector from the bottom to the top.
        NOTE:

        If the connector is rotated clockwise from the bottom 5 times or more, the spiral cable with sensor sub-assembly may be damaged.

        HINT: 

        The interlock operates at the top and bottom of the connector.

        GTY801765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Counterclockwise
      4. Check that the spiral cable with sensor sub-assembly is center position.

        OK

        The connector is at the top.

        The colored roller or the top of the flat cable U-turn can be checked from the check window.

        GTY810726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *A Colored Roller (Visible Type) *B Flat Cable (Visible Type)
        *a Check Window *b Colored Roller
        *c Top of Flat Cable U-turn - -
        NOTE:

        If the spiral cable with sensor sub-assembly cannot be centered, it is possible that the spiral cable with sensor sub-assembly is broken. Replace the spiral cable with sensor sub-assembly with a new one.

  8. INSTALL STEERING WHEEL ASSEMBLY 

    Refer to INSTALLATION [07/2020 - ]

  9. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 

    Refer to INSTALLATION [05/2023 - ]

  10. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL 

    HINT: 

    When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [05/2023 - ]

  11. PERFORM DIAGNOSTIC SYSTEM CHECK 

    Refer to DTC CHECK / CLEAR [07/2020 - ]

  12. CHECK SRS WARNING LIGHT 

    Refer to OPERATION CHECK [07/2020 - ]

  13. CUSTOMIZE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM 

    Refer to PROCEDURE - Step 23

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