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Charging System (Service Information): Generator: Inspection: Inspection

  1. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY 
    1. Using a vernier caliper, measure the brush length.
      Fig 1: Inspecting Generator Brush Holder Assembly
      GTY313283Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard length

      9.5 to 11.5 mm (0.374 to 0.453 in.)

      Minimum length

      4.5 mm (0.177 in.)

      TEXT IN ILLUSTRATION

      *1 Length

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

  2. INSPECT GENERATOR ROTOR ASSEMBLY 
    1. Check the rotor for an open circuit.
      Fig 2: Inspecting Generator Rotor Assembly
      GTY314381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        Slip ring - Slip ring 20°C (68°F) 2.3 to 2.7 Ω
        TEXT IN ILLUSTRATION

        *1 Slip Ring

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

    2. Check if the rotor is grounded.
      Fig 3: Checking If Rotor Is Grounded
      GTY311914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        Slip ring - Rotor core Always 10 kΩ or higher
        TEXT IN ILLUSTRATION

        *1 Slip Ring
        *2 Rotor Core

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

    3. Check the slip ring diameter.
      1. Using a vernier caliper, measure the diameter of each slip ring.
        Fig 4: Measuring Slip Ring Diameter
        GTY161813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard diameter

        14.2 to 14.8 mm (0.559 to 0.583 in.)

        Minimum diameter

        14.0 mm (0.551 in.)

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

    4. Check the bearing.
      1. Check that the bearing is not rough or worn and that it rotates smoothly.
        Fig 5: Checking Bearing For Rough Or Worn And Rotates Smoothly
        GTY194830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  3. INSPECT GENERATOR PULLEY WITH CLUTCH 
    1. Hold the center of the pulley and confirm that the outer ring turns counterclockwise and does not turn clockwise.
      Fig 6: Inspecting Generator Pulley With Clutch
      GTY310231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      Free
      Lock

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

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