Inspection [08/2013 - ]

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

When using a vise, do not overtighten it.

INSPECT PRELOAD (for Manual Tilt and Manual Telescopic Steering Column)

Secure the steering column assembly in a vice using aluminum plates as shown in the illustration.

Fig 1: Securing Steering Column Assembly In A Vice Using Aluminum Plates And Wooden Block

Courtesy 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.
Support the steering column assembly with a wooden block or similar item to ensure that it does not fall.

Install the 2 service nuts to the steering main shaft.

Fig 2: Identifying Steering Main Shaft Service Nuts
Courtesy 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.)
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.
Using a torque wrench, turn the main shaft and measure the preload.

Fig 3: Measuring Turning Torque Of Steering Main Shaft With Motor Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Preload

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

If the preload is not as specified, replace the power steering ECU with motor assembly or electric power steering column sub-assembly with a new one.

INSPECT PRELOAD (for Power Tilt and Power Telescopic Steering Column)
1. Securely set the steering column assembly on a wooden block or similar item.
  
  Fig 4: Securing Steering Column Assembly On Wooden Block
  Courtesy 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.
2. Install the 2 service nuts to the steering main shaft.
  
  Fig 5: Identifying Steering Main Shaft Service Nuts
  Courtesy 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.)
3. 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.
4. Using a torque wrench, turn the main shaft and measure the preload.
  
  Fig 6: Measuring Main Shaft Preload
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Preload
  
  Torque: 1.1 to 1.9 N*m (12 to 19 kgf*cm, 10 to 17 in.*lbf)
  
  If the preload is not as specified, replace the power steering ECU with motor assembly or electric power steering column sub-assembly with a new one.

INSPECT STEERING COLUMN ASSEMBLY (for Manual Tilt and Manual Telescopic Steering Column)

Check that the 2 capsules are securely installed to the steering column assembly as shown in the illustration.

Fig 7: Inspecting Steering Column Assembly Capsules

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Minimum Dimension

A	B
1 mm (0.0394 in.)	12 mm (0.473 in.)

TEXT IN ILLUSTRATION

Capsule

If the capsules are not positioned as specified, replace the electric power steering column sub-assembly with a new one.

Check the 2 capsules for deformation and damage.
If either of the capsules is deformed, loose, missing or damaged, replace the electric power steering column sub-assembly with a new one.

INSPECT TILT MOTOR (for Power Tilt and Power Telescopic Steering Column)

Apply 12 V battery voltage to the tilt motor connector.

Fig 8: Tilt Motor (For Power Tilt And Power Telescopic Steering Column) Connector End View
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Then check the steering wheel tilt operation.

Measurement Condition	Specified Condition
12 V battery positive (+) lead → Terminal 1 (TIM-) 12 V battery negative (-) lead → Terminal 2 (TIM+)	The steering wheel tilts down.
12 V battery positive (+) lead → Terminal 2 (TIM+) 12 V battery negative (-) lead → Terminal 1 (TIM-)	The steering wheel tilts up.

TEXT IN ILLUSTRATION

*a	Component without harness connected (Tilt Motor)

INSPECT TELESCOPIC MOTOR (for Power Tilt and Power Telescopic Steering Column)

Apply 12 V battery voltage to the telescopic motor connector.

Fig 9: Telescopic Motor (For Power Tilt And Power Telescopic Steering Column) Connector End View
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Then check the steering column telescopic operation.

Measurement Condition	Specified Condition
12 V battery positive (+) lead → Terminal 2 (TEM+) 12 V battery negative (-) lead → Terminal 1 (TEM-)	The steering column contracts.
12 V battery positive (+) lead → Terminal 1 (TEM-) 12 V battery negative (-) lead → Terminal 2 (TEM+)	The steering column extends.

TEXT IN ILLUSTRATION

*a	Component without harness connected (Telescopic Motor)