POWER STEERING ECU (for Power Tilt and Power Telescopic Steering Column) INSTALLATION


  1. INSTALL POWER STEERING ECU WITH MOTOR ASSEMBLY


    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. A01G7KDE01

      Temporarily install the power steering ECU with motor assembly to the electric power steering column sub-assembly with 3 bolts.

      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. A01G6PGE02
      Text in Illustration
      *1 Service Nut

      Install the 2 service nuts to the steering main shaft.

      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.

      Tech Tips

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

    6. A01G512E01
      Text in Illustration
      *1 Wooden Block

      Securely set the steering column assembly on a wooden block or similar item.

      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. A01G70N

      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.

    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. A01G5ML

      Measure the turning torque of the steering main shaft.

      Torque:
      Turning torque
      1.1 to 1.9 N*m  { 12 to 19 kgf*cm, 10 to 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. CONNECT ECU WIRE SUB-ASSEMBLY


    1. Connect the 2 connectors to the power steering ECU with motor assembly.

  3. INSTALL POWER STEERING ECU PROTECTOR


    1. Install a new power steering ECU protector to the power steering ECU with motor assembly.

  4. INSTALL STEERING LOCK ACTUATOR ASSEMBLY

    Tech Tips

    When replacing the steering lock actuator assembly, refer to Service Bulletin.


    1. A01G8Z2

      Temporarily install the steering lock actuator assembly to the steering column assembly with 2 new tapered-head bolts.

    2. Tighten the 2 tapered-head bolts until the bolt heads break off.

  5. INSTALL STEERING COLUMN ASSEMBLY

    Click here

  6. TORQUE SENSOR ZERO POINT CALIBRATION

    Click here

  7. ASSIST MAP WRITING

    Click here