STEERING PAD REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the horn button assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced
Replacement Part or Procedure Necessary Procedures Effects/Inoperative when not performed Link
Disconnect cable from negative battery terminal Memorize steering angle neutral point Lane departure alert system (w/ Steering Control)

Click here

Simple intelligent parking assist system*1
Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)*1
Pre-collision system
Initialize back door lock Power door lock control system

Click here

Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)*2 Stop and start system

Click here

*1: When performing learning using the GTS.

Click here

*2: w/ Stop and start system

Tech Tips


  • Use the same procedure for RHD and LHD vehicles.

  • The following procedure is for LHD vehicles.

PROCEDURE


  1. PRECAUTION

    CAUTION:

    Be sure to read Precaution thoroughly before servicing.

    Click here

    B008KCO

    Note

    After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    CAUTION:


    • B008LDR

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

    • If an SRS part is accidentally deployed, it may cause a serious injury.

    Note

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

    Click here

  3. REMOVE HORN BUTTON ASSEMBLY

    CAUTION:

    When storing the horn button assembly, keep the airbag deployment side facing upward.

    B008KSOC01
    B008MCV Deployment Side

    1. Check that the ignition switch off.

    2. Check that the cable is disconnected from the negative (-) battery terminal.

      CAUTION:

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

      B008LDR
    3. B008MFC

      Turn the steering wheel assembly 90° to the left.

    4. B008M5JC01
      *a 55 mm (2.17 in.)
      *b 95 mm (3.74 in.)
      B008MCV Protective Tape

      Wrap protective tape around a 6 mm hexagon wrench as shown in the illustration.

      Tech Tips

      Use a 6 mm hexagon wrench with a long arm length of approximately 95 mm (3.74 in.).

    5. B008L5JC01
      *a Housing Tab
      *b Omega Spring
      B008MCV Protective Tape

      Insert the 6 mm hexagon wrench into the service hole until the protective tape is at the position shown in the illustration.

      Tech Tips

      Make sure to insert the 6 mm hexagon wrench into the service hole on the backside of the steering wheel assembly.

    6. B008KJ2C01
      *a Housing Tab
      *b Omega Spring

      Using the 6 mm hexagon wrench, push down the housing tab to disengage the hook as shown in the illustration.

      Tech Tips

      Pushing down the housing tab will push the omega spring and disengage it from the hook.

    7. B008MCL

      Turn the steering wheel assembly 180° to the right.

    8. B008M48C01
      *a Housing Tab
      *b Omega Spring
      B008MCV Protective Tape

      Insert the 6 mm hexagon wrench into the service hole until the protective tape is at the position shown in the illustration.

      Tech Tips

      Make sure to insert the 6 mm hexagon wrench into the service hole on the backside of the steering wheel assembly.

    9. B008M2FC01
      *a Housing Tab
      *b Omega Spring

      Using the 6 mm hexagon wrench, push down the housing tab to disengage the hook as shown in the illustration.

      Note

      Lightly hold the horn button assembly so that it does not fall.

      Tech Tips

      Pushing down the housing tab will push the omega spring and disengage it from the hook.

    10. B008MFYC01
      *a Spring

      Check that each hook is disengaged.

      Tech Tips

      If a hook is disengaged, the spring will be visible at the location shown in the illustration.

    11. B008LAO

      Turn the steering wheel assembly 90° to the right.

    12. B008KJJC01
      *a Housing Tab
      *b Hook

      Using a 6 mm hexagon wrench, push the housing tab to disengage the hook as shown in the illustration.

      Note

      Lightly hold the horn button assembly so that it does not fall.

      Tech Tips


      • Insert the 6 mm hexagon wrench into the service hole until it contacts the hook and then push down the housing tab while pushing it toward the rear of the vehicle.

      • Pushing down the housing tab will disengage it from the hook.

    13. Turn the steering wheel assembly 180° to the left to align the front wheels facing straight ahead.

      Note

      Do not drop the horn button assembly.

    14. Pull out the horn button assembly from the steering wheel assembly and hold the horn button assembly with one hand.

      Note

      When separating the horn button assembly, do not pull the airbag wire harness.

    15. for Single Type:


      1. B008KRDC01
        *a Airbag Connector
        *b Horn Connector
        *c Airbag Connector Lock
        *d Protective Tape
        *e Wire Harness Clamp

        Disconnect the horn connector from the horn button assembly.

      2. Using a screwdriver with its tip wrapped in protective tape, release the airbag connector lock.

      3. Disconnect the airbag connector.

      4. Disengage the wire harness clamp to remove the horn button assembly

        Note

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

    16. for Dual Type:


      1. B008LJAC01
        *a Airbag Connector
        *b Horn Connector
        *c Airbag Connector Lock
        *d Protective Tape
        *e Wire Harness Clamp

        Disconnect the horn connector from the horn button assembly.

      2. Using a screwdriver with its tip wrapped in protective tape, release the 2 airbag connector locks.

      3. Disconnect the 2 airbag connectors.

      4. Disengage the wire harness clamp to remove the horn button assembly

        Note

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