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Inspection [12/2015 - 08/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT GENERATOR CLUTCH PULLEY 
    1. Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.
      GTY731370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Free
      *b Lock

      If the result is not as specified, replace the clutch pulley.

  2. INSPECT GENERATOR DRIVE END FRAME BEARING 
    1. Check that the bearing is not rough or worn.
      GTY146430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The bearing rotates smoothly.

      If necessary, replace the generator drive end frame bearing.

  3. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY 
    1. Using a vernier caliper, measure the length of the exposed brushes.
      GTY735482Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Length

      Standard exposed length

      9.5 to 11.5 mm (0.374 to 0.453 in.)

      Minimum exposed length

      4.5 mm (0.177 in.)

      If the exposed length is less than the minimum, replace the brush holder assembly.

  4. INSPECT GENERATOR ROTOR ASSEMBLY 
    1. Check that the generator rotor bearing is not rough or worn.
      GTY609535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If necessary, replace the generator rotor assembly.

    2. Check the generator rotor for an open circuit.
      GTY701190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.
        TEXT IN ILLUSTRATION

        *1 Slip Ring
        *2 Ohmmeter

        Standard Resistance

        Tester Connection Condition Specified Condition
        Slip ring - Slip ring 20°C (68°F) 1.5 to 1.9 Ω

        If the result is not as specified, replace the generator rotor assembly.

    3. Check the rotor for a short to ground.
      GTY251531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.
        TEXT IN ILLUSTRATION

        *1 Slip Ring
        *2 Rotor
        *3 Ohmmeter

        Standard Resistance

        Tester Connection Condition Specified Condition
        Slip ring - Rotor Always 1 MΩ or higher

        If the result is not as specified, replace the generator rotor assembly.

    4. Using a vernier caliper, measure the slip ring diameter.
      GTY182895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Diameter

      Standard diameter

      14.2 to 14.4 mm (0.559 to 0.567 in.)

      Minimum diameter

      14.0 mm (0.551 in.)

      If the diameter is less than the minimum, replace the generator rotor assembly.

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