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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information >> CAMSHAFT TIMING CONTROL MOTOR (for Bank 1) >> Inspection [12/2017 - 10/2020] >> Procedure
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Inspection [12/2017 - 10/2020]: Procedure

  1. INSPECT CAM TIMING CONTROL MOTOR WITH EDU ASSEMBLY RH 
    NOTE:
    • Make sure the contact surface of the cam timing control motor with EDU assembly RH (the surface that contacts the No. 2 timing gear cover assembly) is free of foreign matter.
    • If the cam timing control motor with EDU assembly RH has been struck or dropped, replace it.
    • Do not disassemble the cam timing control motor with EDU assembly RH. If disassembled, replace it.
    1. Rotate the joint of the cam timing control motor with EDU assembly RH by hand and check that it rotates smoothly.
      GTY751938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Joint

      Standard Condition

      The joint rotates smoothly.

      HINT: 

      Due to the magnetic force of the cam timing control motor with EDU assembly RH the joint may feel as if it is sticking when turning it.

      If the result is not as specified, replace the cam timing control motor with EDU assembly RH.

  2. INSPECT CAMSHAFT TIMING INTAKE GEAR ASSEMBLY RH 
    NOTE:
    • If the camshaft timing gear assembly RH has been struck or dropped, replace it.
    • Do not disassemble the camshaft timing gear assembly RH. If disassembled, replace it.
    1. Rotate the camshaft timing gear assembly RH eccentric shaft by hand.
      GTY795219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Eccentric Shaft

      Standard Condition

      The shaft rotates smoothly.

      HINT: 

      • The eccentric shaft may feel difficult to rotate due to the spring inside the camshaft timing gear assembly RH.
      • If the result is not as specified, replace the camshaft timing gear assembly RH.
    2. Inspect the joint clearance.
      GTY801979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Cutout
      *b Joint
      1. Using a vernier caliper, measure the width (A) of the cutout of the camshaft timing gear assembly RH eccentric shaft.

        Standard Width

        5.98 to 6.05 mm (0.235 to 0.238 in.)

      2. Using a vernier caliper, measure the width (B) of the joint of the cam timing control motor with EDU assembly RH.

        Standard Width

        5.90 to 5.95 mm (0.232 to 0.234 in.)

      3. Calculate the clearance by subtracting the width (B) of the joint of the cam timing control motor with EDU assembly RH from the width (A) of the cutout of the camshaft timing gear assembly RH eccentric shaft.

        Standard Clearance

        0.03 to 0.15 mm (0.00118 to 0.00591 in.)

        Maximum Clearance

        0.7 mm (0.0276 in.)

        HINT: 

        If the clearance is more than the maximum, replace the camshaft timing gear assembly RH or cam timing control motor with EDU assembly RH.

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