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Home >> Lexus >> 2023 >> ES 350 Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Service Information (1 Of 3) >> Spiral Cable >> Installation [09/2022 - ] >> Procedure

Installation [09/2022 - ]: Procedure

  1. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Check if the spiral cable sub-assembly is centered.

      OK: 

      • The connector is positioned at the top.
      • The alignment marks are aligned correctly.
      • The flat cable can be seen in the inspection window.
      GTY796147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Inspection Window
      *b Alignment Mark
      *c Flat Cable
    2. If the spiral cable sub-assembly is not centered, center it.
      NOTE:

      Make sure to observe the following precautions, otherwise the spiral cable sub-assembly may be damaged.

      • Release the interlock before rotating the spiral cable sub-assembly.
      • Do not rotate the spiral cable sub-assembly using the airbag wire harness.
      • Do not rotate the spiral cable sub-assembly with excessive force.
      1. While pushing on the interlock shown in the illustration, rotate the spiral cable sub-assembly counterclockwise slowly by hand until it stops.
        GTY801455Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Rotation Direction
        NOTE:

        If the spiral cable sub-assembly is rotated clockwise in this step, it may be damaged and may no longer be able to be centered. Make sure to only rotate the spiral cable sub-assembly counterclockwise.

        HINT: 

        If the interlock is engaged, the spiral cable sub-assembly will lock when the connector is near at the top or bottom of the rotation of the spiral cable sub-assembly.

      2. If the connector is not positioned at the bottom of the rotation of the spiral cable sub-assembly when the spiral cable sub-assembly is turned until it stops, turn the spiral cable sub-assembly clockwise until the connector is positioned at the bottom as shown in the illustration.
        GTY819603Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. While pushing on the interlock shown in the illustration, rotate the spiral cable sub-assembly clockwise approximately 2.5 times.
        GTY814181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Rotation Direction
        NOTE:

        If the spiral cable sub-assembly is rotated clockwise 5 times or more from the point at which it stops and the connector is positioned at the bottom, the spiral cable sub-assembly may be damaged.

        HINT: 

        If the interlock is engaged, the spiral cable sub-assembly will lock when the connector is near at the top or bottom of the rotation of the spiral cable sub-assembly.

      4. Check that the spiral cable sub-assembly is centered.

        OK: 

        • The connector is positioned at the top.
        • The alignment marks are aligned correctly.
        • The flat cable can be seen in the inspection window.
        GTY796147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Window
        *b Alignment Mark
        *c Flat Cable
  2. INSTALL SPIRAL CABLE SUB-ASSEMBLY 
    1. Align the 2 pins and 2 guides, and engage the 6 claws to install the spiral cable sub-assembly to the steering sensor.
      GTY765147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Guide
      *b Pin
      *c Lock Pin
      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 engaged. 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.
      GTY766364Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY 
    NOTE:
    • Do not remove/install the spiral cable with sensor sub-assembly with the auxiliary battery connected and the engine switch (for Gasoline Model) or power switch (for HV Model) on (IG).
    • Do not rotate the spiral cable with sensor sub-assembly without the steering wheel assembly installed, with the auxiliary battery connected and the engine switch (for Gasoline Model) or power switch (for HV Model) on (IG).
    • Ensure that the steering wheel assembly is installed and aligned straight when inspecting the steering sensor.
    1. Check that the engine switch (for Gasoline Model) or power switch (for HV Model) is off.
    2. Check that the cable is disconnected from the negative (-) auxiliary battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      GTY684647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check that the front wheels are aligned facing straight ahead.
    4. Engage the claw and 2 clips to install the spiral cable with sensor sub-assembly.
    5. Install the wire harness to the spiral cable with sensor sub-assembly as shown in the illustration.
      GTY826048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    6. Connect each connector.
  4. INSTALL UPPER STEERING COLUMN COVER (for Manual Tilt and Manual Telescopic Steering Column) 

    Refer to PROCEDURE - Step 10

  5. INSTALL UPPER STEERING COLUMN COVER (for Power Tilt and Power Telescopic Steering Column) 

    Refer to PROCEDURE - Step 10

  6. INSTALL LOWER STEERING COLUMN COVER SUB-ASSEMBLY (for Manual Tilt and Manual Telescopic Steering Column) 

    Refer to PROCEDURE - Step 11

  7. INSTALL LOWER STEERING COLUMN COVER SUB-ASSEMBLY (for Power Tilt and Power Telescopic Steering Column) 

    Refer to PROCEDURE - Step 11

  8. ALIGN FRONT WHEELS FACING STRAIGHT AHEAD 
  9. INSPECT AND ADJUST SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY 
    1. Check that the engine switch (for Gasoline Model) or power switch (for HV Model) is off.
    2. Check that the cable is disconnected from the negative (-) auxiliary battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      GTY684647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check if the spiral cable with sensor sub-assembly is centered.
      GTY828609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Inspection Window
      *b Flat Cable

      OK: 

      • The connector is positioned at the top.
      • The flat cable can be seen in the inspection window.
    4. If the spiral cable with sensor sub-assembly is not centered, center it.
      NOTE:

      Make sure to observe the following precautions, otherwise the spiral cable with sensor sub-assembly may be damaged.

      • Do not rotate the spiral cable with sensor sub-assembly with the auxiliary battery connected and the engine switch (for Gasoline Model) or power switch (for HV Model) on (IG).
      • Release the interlock before rotating the spiral cable with sensor sub-assembly.
      • Do not rotate the spiral cable with sensor sub-assembly using the airbag wire harness.
      • Do not rotate the spiral cable with sensor sub-assembly with excessive force.
      1. While pushing on the interlock shown in the illustration, rotate the spiral cable with sensor sub-assembly counterclockwise slowly by hand until it stops.
        GTY836080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Rotation Direction
        NOTE:

        If the spiral cable with sensor sub-assembly is rotated clockwise in this step, it may be damaged and may no longer be able to be centered. Make sure to only rotate the spiral cable with sensor sub-assembly counterclockwise.

        HINT: 

        If the interlock is engaged, the spiral cable with sensor sub-assembly will lock when the connector is near at the top or bottom of the rotation of the spiral cable with sensor sub-assembly.

      2. If the connector is not positioned at the bottom of the rotation of the spiral cable with sensor sub-assembly when the spiral cable with sensor sub-assembly is turned until it stops, turn the spiral cable with sensor sub-assembly clockwise until the connector is positioned at the bottom as shown in the illustration.
        GTY785561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. While pushing on the interlock shown in the illustration, rotate the spiral cable with sensor sub-assembly clockwise approximately 2.5 times.
        GTY790958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Interlock
        Rotation Direction
        NOTE:

        If the spiral cable with sensor sub-assembly is rotated clockwise 5 times or more from the point at which it stops and the connector is positioned at the bottom, the spiral cable with sensor sub-assembly may be damaged.

        HINT: 

        If the interlock is engaged, the spiral cable with sensor sub-assembly will lock when the connector is near at the top or bottom of the rotation of the spiral cable with sensor sub-assembly.

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

        OK: 

        • The connector is positioned at the top.
        • The flat cable can be seen in the inspection window.
        GTY828609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Window
        *b Flat Cable
        NOTE:

        If the spiral cable with sensor sub-assembly cannot be centered, it may be damaged. Replace the spiral cable sub-assembly and steering sensor with a new one.

  10. INSTALL STEERING WHEEL ASSEMBLY 

    Refer to PROCEDURE - Step 8

  11. CHECK STEERING WHEEL CENTER POINT 
  12. INSTALL HORN BUTTON ASSEMBLY 

    See step  1

  13. INSTALL LOWER NO. 3 STEERING WHEEL COVER 

    See step  2

  14. INSTALL LOWER NO. 2 STEERING WHEEL COVER 

    See step  3

  15. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    for 2GR-FKS: Refer to PROCEDURE - Step 2

    for A25A-FXS: Refer to PROCEDURE - Step 2

    for A25A-FKS: Refer to PROCEDURE - Step 2

    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [09/2022 - ]

  16. INSPECT HORN BUTTON ASSEMBLY 
    1. Make sure that the horn sounds.

      If the horn does not sound, inspect the horn system.

      Refer to PROBLEM SYMPTOMS TABLE [06/2018 - ]

  17. PERFORM DIAGNOSTIC SYSTEM CHECK 

    for Gasoline Model: Refer to DTC CHECK / CLEAR [06/2018 - ]

    for HV Model: Refer to DTC CHECK / CLEAR [06/2018 - ]

  18. INSPECT SRS WARNING LIGHT 

    for Gasoline Model: Refer to OPERATION CHECK [09/2022 - ]

    for HV Model: Refer to OPERATION CHECK [09/2022 - ]

  19. CUSTOMIZE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM (for Power Tilt and Power Telescopic Steering Column) 

    Refer to PROCEDURE - Step 17

  20. PERFORM INITIALIZATION 

    for Parking Support Brake System Calibration: Refer to CALIBRATION [09/2022 - ]

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