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Reassembly [07/2015 - ]: Procedure

  1. INSTALL POWER STEERING ECU WITH MOTOR ASSEMBLY (for Manual Tilt and Manual Telescopic Steering Column) 
    1. Install a new electric power steering motor shaft damper to the electric power steering column sub-assembly.
    2. Install a new electric power steering motor shaft spacer to the electric power steering column sub-assembly.
    3. Temporarily install the power steering ECU with motor assembly to the electric power steering column sub-assembly with 3 bolts.
      GTY414779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Bolt (A) is shorter than bolt (B). Make sure to install them to the correct positions.
      • When temporarily installing the 3 bolts to the power steering ECU with motor assembly, do not tighten them all the way down.
    4. Install the 2 service nuts to the steering main shaft.
      GTY471299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Service Nut

      Recommended service nut

      Thread diameter 

      12.0 mm (0.472 in.)

      Thread pitch 

      1.25 mm (0.0492 in.)

    5. Simultaneously rotate the service nut that was installed first counterclockwise and rotate the service nut that was installed second clockwise to lock them.
      NOTE:

      Do not apply excess torque to the service nuts by using a tool such as an impact wrench.

      HINT: 

      These nuts are installed to turn the steering main shaft. They should be removed after inspecting the steering main shaft rotating torque.

    6. Secure the steering column assembly in a vice using aluminum plates as shown in the illustration.
      GTY668477Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Aluminum Plate
      *2 Wooden Block
      NOTE:
      • Do not overtighten the vice, as the steering column assembly may become deformed.
      • Secure the steering column assembly so that the power steering ECU with motor assembly is directly upright.
      • Support the steering column assembly with a wooden block or similar item to ensure that it does not fall.
    7. Turn the steering main shaft once 180 degrees to the left and then 180 degrees to the right at a speed of 60 rpm, and repeat 2 to 3 times to adjust the axis of the power steering ECU with motor assembly.
      GTY316184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Tighten the 3 bolts.

      Torque: 19 N*m (189 kgf*cm, 14 ft.*lbf) 

      NOTE:

      Make sure not to move the power steering motor assembly after adjusting the axis.

    9. Measure the turning torque of the steering main shaft.
      GTY316185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Turning torque 

      Torque: 1.1 N*m (1.9 N*m (12 kgf*cm, 19 kgf*cm, 10 in.*lbf) 17 in.*lbf) 

      NOTE:

      Ensure that there is no abnormal resistance during rotation.

      If the torque is not as specified, readjust the axis of the power steering ECU with motor assembly.

    10. Remove the 2 service nuts from the steering main shaft.
    11. Connect the connector to the power steering ECU with motor assembly.
  2. INSTALL ECU WIRE SUB-ASSEMBLY (for Manual Tilt and Manual Telescopic Steering Column) 
    1. Engage the 2 wire harness clamps to install the ECU wire sub-assembly.
    2. Connect the 2 connectors to the power steering ECU with motor assembly.
  3. INSTALL POWER STEERING ECU WITH MOTOR ASSEMBLY (for Power Tilt and Power Telescopic Steering Column) 
    1. Install a new electric power steering motor shaft damper to the electric power steering column sub-assembly.
    2. Install a new electric power steering motor shaft spacer to the electric power steering column sub-assembly.
    3. Temporarily install the power steering ECU with motor assembly to the electric power steering column sub-assembly with 3 bolts.
      GTY635975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Bolt (A) is shorter than bolt (B). Make sure to install them to the correct positions.
      • When temporarily installing the 3 bolts to the power steering ECU with motor assembly, do not tighten them all the way down.
    4. Install the 2 service nuts to the steering main shaft.
      GTY471299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Service Nut

      Recommended service nut

      Thread diameter 

      12.0 mm (0.472 in.)

      Thread pitch 

      1.25 mm (0.0492 in.)

    5. Simultaneously rotate the service nut that was installed first counterclockwise and rotate the service nut that was installed second clockwise to lock them.
      NOTE:

      Do not apply excess torque to the service nuts by using a tool such as an impact wrench.

      HINT: 

      These nuts are installed to turn the steering main shaft. They should be removed after inspecting the steering main shaft rotating torque.

    6. Securely set the steering column assembly on a wooden block or similar item.
      GTY669189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Wooden Block
      NOTE:
      • Be sure to hold the steering column assembly by hand so that it will not move while servicing.
      • Make sure that the power steering motor assembly is facing upward.
    7. Turn the steering main shaft once 180 degrees to the left and then 180 degrees to the right at a speed of 60 rpm, and repeat 2 to 3 times to adjust the axis of the power steering ECU with motor assembly.
      GTY416004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Tighten the 3 bolts.

      Torque: 19 N*m (189 kgf*cm, 14 ft.*lbf) 

      NOTE:

      Make sure not to move the power steering motor assembly after adjusting the axis.

    9. Measure the turning torque of the steering main shaft.
      GTY668090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Turning torque 

      Torque: 1.1 N*m (1.9 N*m (12 kgf*cm, 19 kgf*cm, 10 in.*lbf) 17 in.*lbf) 

      NOTE:

      Ensure that there is no abnormal resistance during rotation.

      If the torque is not as specified, readjust the axis of the power steering ECU with motor assembly.

    10. Remove the 2 service nuts from the steering main shaft.
    11. Connect the connector to the power steering ECU with motor assembly.
  4. INSTALL ECU WIRE SUB-ASSEMBLY (for Power Tilt and Power Telescopic Steering Column) 
    1. Engage the 2 wire harness clamps to install the ECU wire sub-assembly.
    2. Connect the 2 connectors to the power steering ECU with motor assembly.
  5. INSTALL POWER STEERING ECU PROTECTOR 
    1. Install a new power steering ECU protector to the power steering ECU with motor assembly.
  6. INSTALL MULTIPLEX TILT AND TELESCOPIC ECU (for Power Tilt and Power Telescopic Steering Column) 
    1. Engage the claw to install the multiplex tilt and telescopic ECU to the electric power steering column sub-assembly.
  7. INSTALL STEERING LOCK ACTUATOR ASSEMBLY 

    HINT: 

    When replacing the steering lock actuator assembly, perform initialization (Refer to REGISTRATION [07/2015 - ] ).

    1. for Manual Tilt and Manual Telescopic Steering Column
      1. Secure the steering column assembly in a vise.
      2. Temporarily install the steering lock actuator assembly to the steering column assembly with 2 new tapered-head bolts.
        GTY323028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Tighten the 2 tapered-head bolts until the bolt heads break off.
    2. for Power Tilt and Power Telescopic Steering Column
      1. Temporarily install the steering lock actuator assembly to the steering column assembly with 2 new tapered-head bolts.
        GTY402384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Tighten the 2 tapered-head bolts until the bolt heads break off.
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