Charging (2UZ-FE): Generator: Inspection

INSPECT GENERATOR ROTOR ASSEMBLY
1. Check the rotor for an open circuit.
  1. Measure the resistance between the slip rings.
    Standard resistance: 2.3 to 2.7 Ω at 20°C (68°F)
    
    If the result is not as specified, replace the rotor assembly.
    
    Fig 1: Measuring Resistance Between Slip Rings
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check if the rotor is grounded.
  1. Measure the resistance between the slip ring and rotor.
    Standard resistance: 10 k. or higher
    
    If the result is not as specified, replace the rotor assembly.
3. Check that the slip rings are not rough or scored.
  If rough or scored, replace the rotor assembly.
  
  Fig 2: Measuring Resistance Between Slip Rings And Rotor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using a vernier caliper, measure the slip ring 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 rotor assembly.
  
  Fig 3: Measuring Slip Ring Diameter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
1. Using a vernier caliper, measure the exposed brush length.
  Standard exposed length: 10.5 mm (0.413 in.)
  
  Minimum exposed length: 4.5 mm (0.177 in.)
  
  If the exposed length is less than the minimum, replace the brush holder assembly.
  
  Fig 4: Measuring Exposed Brush Length
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT GENERATOR DRIVE END FRAME BEARING
1. Check that the bearing is not rough or worn.
  If necessary, replace the bearing.
INSPECT GENERATOR ROTOR BEARING
1. Check that the bearing is not rough or worn.
  If necessary, replace the generator rotor.
  
  Fig 5: Inspecting Generator Frame Bearing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002