Charging (4GR-FSE): Generator: Inspection

1. Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.

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

Fig 1: Inspecting Clutch Pulley

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1. Using vernier calipers, measure the length of the exposed brushes.

Fig 2: Measuring Length Of Exposed Brushes Using Vernier Calipers

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Standard length: 

10.5 mm (0.413 in.) 

Minimum length: 

4.5 mm (0.177 in.) 

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

1. Check that the rotor bearing is not rough or worn. If necessary, replace the rotor bearing.
   Fig 3: Checking Rotor Bearing

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2. Check the rotor for an open circuit.
   1. Using an ohmmeter, measure the resistance between the slip rings.

   Standard resistance 

   RESISTANCE CONDITION SPECIFICATION
   
   

   Condition	Specified condition
   Approx. 20°C (68°F)	1.5 to 1.9 ohms

   Fig 4: Measuring Resistance Between Slip Rings Using Ohmmeter

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   If the resistance is not within the specified range, replace the rotor assembly.

3. Check the rotor for a short to ground.
   1. Using an ohmmeter, measure the resistance between the slip ring and rotor.

   Standard resistance 

   RESISTANCE CONDITION SPECIFICATION
   
   

   Tester condition	Specified condition
   Slip ring - Rotor	1 M ohms or higher

   Fig 5: Measuring Resistance Between Slip Ring & Rotor Using Ohmmeter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the resistance is not within the specified range, replace the rotor assembly.

4. Using vernier calipers, measure the slip ring diameter.

Fig 6: Measuring Slip Ring Diameter Using Vernier Calipers

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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.

1. Check that the drive end frame bearing is not rough or worn.

Fig 7: Inspecting Drive End Frame Bearing

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If necessary, replace the drive end frame bearing.