Steering Column (Service Information): Diagnosis Lexus ES XV60

INSPECTION [06/2012 - ]

Note. When using a vise, do not overtighten it.

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1. 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. 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. 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. 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.
2. INSPECT PRELOAD (for Power Tilt and Power Telescopic Steering Column) Securely set the steering column assembly on a wooden block or similar item. 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. 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.) 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. 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.
3. 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. Minimum Dimension A B 1 mm (0.0394 in.) 12 mm (0.473 in.) TEXT IN ILLUSTRATION *1 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.
4. INSPECT TILT MOTOR (for Power Tilt and Power Telescopic Steering Column) Apply 12 V battery voltage to the tilt motor connector. Then check the steering wheel tilt operation. OK 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)
5. INSPECT TELESCOPIC MOTOR (for Power Tilt and Power Telescopic Steering Column) Apply 12 V battery voltage to the telescopic motor connector. Then check the steering column telescopic operation. OK 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)