POWER STEERING ECU (w/ Wireless Door Lock System) INSTALLATION

INSTALL POWER STEERING ECU WITH MOTOR ASSEMBLY (for 2AR)

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.

   

   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 motor assembly, do not tighten them all the way down.

4. Install the 2 service nuts to the steering main shaft.

   

   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 to 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. Secure the steering column assembly in a vice using aluminum plates and wooden block as shown in the illustration.

   

   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 power steering ECU assembly with motor 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.

   

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.

   

   Torque:

   Turning torque

   1.0 to 1.8 N*m  { 10 to 18 kgf*cm, 9 to 15 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.

INSTALL POWER STEERING ECU PROTECTOR (for 2AR)

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

INSTALL POWER STEERING ECU WITH MOTOR ASSEMBLY (for 2GR)

1. Install the 2 service nuts to the steering main shaft.

   

   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.)

2. Simultaneously to 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.

3. Install a new O-ring to the power steering ECU with motor assembly.

4. Apply grease to the splines of the power steering ECU with motor assembly.

   

   Note

   First wipe off the existing grease from the splines, and then apply the dedicated grease supplied with a new power steering motor assembly or electric power steering column sub-assembly.

5. Insert the power steering ECU with motor assembly into the splines of the electric power steering column sub-assembly.

   Note

   Do not damage the gears.

6. Secure the steering column assembly in a vice using aluminum plates and wooden block as shown in the illustration.

   

   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 power steering 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. Temporarily install the power steering ECU with motor assembly to the electric power steering column sub-assembly with 2 new bolts while rotating the steering main shaft at approximately 4 rpm.

   

   Note

   When temporarily installing the 2 bolts to the power steering motor assembly, do not tighten them all the way down.

8. Rotate the steering main shaft 120 to 240 degrees at approximately 4 rpm.

9. Rotate the steering main shaft 180 degrees clockwise and counterclockwise at approximately 4 rpm and repeat this operation 2 or 3 times to align the power steering ECU with motor assembly.

10. Tighten the 2 bolts.

    Torque:

    19 N*m  { 194 kgf*cm, 14 ft.*lbf }

    Note

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

11. Measure the turning torque of the steering main shaft.

    

    Torque:

    Turning torque

    1.2 to 1.7 N*m  { 12 to 17 kgf*cm, 10 to 15 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.

12. Remove the 2 service nuts from the steering main shaft.

13. Connect the 2 connectors to the power steering ECU assembly.

INSTALL POWER STEERING ECU PROTECTOR (for 2GR)

1. Engage the 2 claws to install a new power steering ECU protector to the power steering ECU with motor assembly.

INSTALL STEERING COLUMN UPPER WITH SWITCH BRACKET ASSEMBLY (w/o Smart Key System)

1. Secure the steering column assembly in a vise.

2. Temporarily install the steering column upper with switch bracket assembly to the steering column assembly with 2 new tapered-head bolts.

   

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

INSTALL STEERING LOCK ACTUATOR ASSEMBLY (w/ Smart Key System)

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.

   

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