DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Service Information (1 Of 2) >> Steering Pad >> Disposal [11/2023 - ] >> Procedure

Disposal [11/2023 - ]: Procedure

  1. PRECAUTION 
    WARNING:
    • An airbag or pretensioner may be activated by static electricity. To prevent this, be sure to touch a metal surface with your bare hands to discharge static electricity before performing this procedure.
    • Never dispose of a horn button assembly with an undeployed airbag.
      GTY606838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • The airbag produces an exploding sound when it is deployed, so perform the operation outdoors where it will not disturb nearby residents.
      GTY572529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • When deploying the airbag, always use the specified SST (SRS airbag deployment tool). Perform the operation in a place away from electrical noise.
    • When deploying the airbag, perform the operation at least 10 m (32.8 ft.) away from the horn button assembly.
    • The horn button assembly becomes extremely hot when the airbag is deployed, so do not touch it for at least 30 minutes after deployment.
    • Use gloves and safety glasses when handling a horn button assembly with a deployed airbag.
    • Do not apply water, etc. to a horn button assembly with a deployed airbag.
    • Always wash your hands with water after completing the operation.

    HINT: 

    When scrapping a vehicle equipped with an SRS or disposing of the horn button assembly, be sure to deploy the airbag first in accordance with the procedure described below. If any abnormality occurs with the airbag deployment, contact the Service Department of the distributor.

  2. DISPOSE OF HORN BUTTON ASSEMBLY (When Installed to Vehicle) 
    NOTE:
    • When disposing of the horn button assembly, never use the customer's vehicle to deploy the airbag.
    • Be sure to observe the following procedure when deploying the airbag.

    HINT: 

    Prepare an auxiliary battery as the power source to deploy the airbag.

    1. Check the function of SST.
      GTY446883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09082-00700 
      WARNING:

      When deploying the airbag, always use the specified SST:

      SRS airbag deployment tool

      1. Connect SST to the auxiliary battery.

        Connect the red clip of SST to the positive (+) auxiliary battery terminal and the black clip of SST to the negative (-) auxiliary battery terminal.

        GTY785204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check the function of SST.

        Press the SST activation switch and check that the LED of the SST activation switch comes on.

        GTY429875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WARNING:
        • Do not connect the yellow SST connector to the airbag.
        • If the LED comes on when the activation switch is not being pressed, SST is malfunctioning. Replace SST.
      3. Disconnect SST from the auxiliary battery.
    2. Refer to Precaution.

      Refer to PRECAUTION [11/2023 - ]

    3. Remove the lower steering column cover.

      Refer to PROCEDURE - Step 1

    4. Remove the battery service hole cover (for HV Model).

      Refer to PROCEDURE - Step 2

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.
      WARNING:

      Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      GTY684647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the yellow airbag connector from the spiral cable with sensor sub-assembly.
      GTY813821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      When disconnecting 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 [11/2023 - ]

    7. Install SST.
      WARNING:

      Check that there is no looseness in the steering wheel assembly or horn button assembly.

      GTY580339Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. After connecting the following SST to each other, connect them to the spiral cable with sensor sub-assembly.
        GTY796340Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • SST: 09082-00700 
        • SST: 09082-00780 
        NOTE:

        To avoid damaging the SST connector or wire harness, do not lock the secondary lock of the twin lock.

      2. Move SST at least 10 m (32.8 ft.) away from the front side window of the vehicle.
        GTY841191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Auxiliary Battery
        *b 10 m (32.8 ft.) or more
      3. Maintaining sufficient clearance for the SST wire harness in the front side window, close all doors and windows of the vehicle.
        NOTE:

        Take care not to damage the SST wire harness.

      4. Connect the red clip of SST to the positive (+) auxiliary battery terminal and the black clip of SST to the negative (-) auxiliary battery terminal.
    8. Deploy the airbag.
      1. Check that no one is inside the vehicle or within a 10 m (32.8 ft.) radius of the vehicle.
      2. Press the SST activation switch to deploy the airbag.
        WARNING:
        • Before deployment, make sure that no one is inside or near the vehicle.
          GTY577536Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • The horn button assembly becomes extremely hot when the airbag is deployed, so do not touch it for at least 30 minutes after deployment.
          GTY580336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • Use gloves and safety glasses when handling a horn button assembly with a deployed airbag.
          GTY606853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • Do not apply water, etc. to a horn button assembly with a deployed airbag.
          GTY580337Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • Always wash your hands with water after completing the operation.

        HINT: 

        The airbag is deployed as the LED of the SST activation switch comes on.

  3. DISPOSE OF HORN BUTTON ASSEMBLY (When not Installed to Vehicle) 
    NOTE:

    Be sure to observe the following procedure when deploying the airbag.

    HINT: 

    Prepare an auxiliary battery as the power source to deploy the airbag.

    1. Check the function of SST.
      GTY446883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09082-00700 
      WARNING:

      When deploying the airbag, always use the specified SST:

      SRS airbag deployment tool

      1. Connect SST to the auxiliary battery.

        Connect the red clip of SST to the positive (+) auxiliary battery terminal and the black clip of SST to the negative (-) auxiliary battery terminal.

        GTY448183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Auxiliary Battery
      2. Check the function of SST.

        Press the SST activation switch and check that the LED of the SST activation switch comes on.

        GTY380048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WARNING:
        • Do not connect the yellow SST connector to the airbag.
        • If the LED comes on when the activation switch is not being pressed, SST is malfunctioning. Replace SST.
      3. Disconnect SST from the auxiliary battery.
    2. Remove the horn button assembly.

      Refer to REMOVAL [11/2023 - ] 

      WARNING:
      • Before removing the horn button assembly, wait at least 60 seconds after turning the ignition switch off and disconnecting the cable from the negative (-) auxiliary battery terminal.
        GTY684647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • When storing the horn button assembly, keep the airbag deployment side facing upward.
        GTY784952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Deployment Side
    3. GTY430873Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Wire Diameter
      *b Stripped Wire Cross Sectional Area

      Using braided wire, tie down the horn button assembly to an unneeded tire and wheel set.

      Wire

      Stripped Wire Cross Sectional Area

      1.25 mm2 (0.0019 in.2 ) or more

      WARNING:

      If the wire is too thin or an alternative object is used to tie down the horn button assembly, it may snap when the airbag is deployed. Always use a wire for vehicle use with a cross sectional area of at least 1.25 mm2 (0.0019 in.2 ).

      HINT: 

      To calculate the cross sectional area of the stripped wire:

      Cross sectional area = 3.14 x (Diameter)2 / 4

      1. Connect SST to the horn button assembly.
        GTY938039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • SST: 09082-00840 
      2. Wind 3 wires around the pins at least 2 times each.
        GTY810733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 2 times or more
        WARNING:
        • Tightly wind the wires around the pins without any slack.
        • Make sure that the wires are tight. If there is slack in the wires, the horn button assembly may break loose when the airbag is deployed.
          GTY645997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Face the airbag deployment side of the horn button assembly upward on top of an unneeded tire and wheel set. Separately tie each side of the horn button assembly to the wheel through the hub nut holes. Position the SST connector so that it hangs downward through the hub hole of the wheel.
        GTY803253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Deployment Side

        Minimum Tire Size

        Width 

        185 mm (7.28 in.)

        Inner Diameter 

        360 mm (1.18 ft.)

        WARNING:
        • Make sure that the wires are tight. If there is slack in the wires, the horn button assembly may break loose when the airbag is deployed.
        • Always tie down the horn button assembly with the airbag deployment side facing upward.
          GTY842842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          Deployment Side
        NOTE:

        The wheel and tire may be damaged by the airbag deployment, so use an unneeded tire and wheel set.

    4. Install SST.
      GTY944934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 10 m (32.8 ft.) or more
      WARNING:

      Place the tire and wheel set on level ground.

      1. Connect the SST connector.
        • SST: 09082-00700 
        NOTE:

        To avoid damaging the SST connector or wire harness, do not lock the secondary lock of the twin lock. Also, secure some slack for the SST wire harness inside the wheel.

      2. Move SST at least 10 m (32.8 ft.) away from the airbag tied down to the tire and wheel set.
    5. Cover the horn button assembly (using a cardboard box).
      1. Cover the horn button assembly with a cardboard box.
        GTY820748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Weight
      2. Place weights on the cardboard box in 4 places totaling at least 190 N (19 kg, 42.7 lb).

        Minimum Cardboard Box Size

        X 

        460 mm (1.51 ft.)

        Y 

        650 mm (2.13 ft.)

        NOTE:
        • When dimension Y of the cardboard box exceeds the diameter of the wheel and tire to which the horn button assembly is tied, X should be the following size.

          X = 460 mm (1.51 ft.) + width of tire

        • If a cardboard box smaller than the specified size is used, it may be broken by the shock of the airbag deployment.
    6. Cover the horn button assembly (using tires).
      1. Place at least 3 tires without wheels onto the tire and wheel set to which the horn button assembly is tied.
        GTY786179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inner Diameter
        *b Width
        *c Tires (3 or more)
      2. Place a tire and wheel set on top.

        Minimum Tire Size

        Width 

        185 mm (7.28 in.)

        Inner Diameter 

        360 mm (1.18 ft.)

        WARNING:

        Do not use tires with wheels except on the top and bottom.

        NOTE:
        • The wheels and tires may be damaged by the airbag deployment, so use unneeded wheels and tires.
        • Do not place the SST connector under the tire because it could be damaged.
      3. Tie the tires together with 2 wires.
        GTY307039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WARNING:

        Make sure that the wires are tight. Looseness in the wires will result in the tires breaking loose when the airbag is deployed.

    7. Deploy the airbag.
      1. Connect the red clip of SST to the positive (+) auxiliary battery terminal and the black clip of SST to the negative (-) auxiliary battery terminal.
        GTY844968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Horn Button Assembly
        *a Using a Cardboard Box
        *b Using Tires
        *c Auxiliary Battery
        *d 10 m (32.8 ft.) or more
      2. Check that no one is within a 10 m (32.8 ft.) radius of the wheel to which the horn button assembly is tied.
      3. Press the SST activation switch to deploy the airbag.
        WARNING:
        GTY577538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Before deployment, make sure that no one is near the airbag.

        HINT: 

        The airbag is deployed as the LED of the SST activation switch comes on.

    8. Dispose of the horn button assembly.
      WARNING:
      • The horn button assembly becomes extremely hot when the airbag is deployed, so do not touch it for at least 30 minutes after deployment.
        GTY597117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Use gloves and safety glasses when handling a horn button assembly with a deployed airbag.
        GTY580334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Do not apply water, etc. to a horn button assembly with a deployed airbag.
        GTY580335Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Always wash your hands with water after completing the operation.
      1. Remove the horn button assembly from the tire and wheel set.
      2. Place the horn button assembly in a plastic bag, tie it tightly and dispose of it according to local regulations.
Diesel-Data.com