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Section 30 (Charging System (2AZ-FE) (Service Information)): Generator: Inspection: Inspection

WARNING: This page is about a different variant/trim than selected.

INSPECT GENERATOR CLUTCH PULLEY
1. Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.
  
  Fig 1: Checking Clutch Pulley
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the generator clutch pulley.
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
1. Using a vernier caliper, measure the length of the exposed brushes.
  
  Fig 2: Measuring Brush Length
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  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.

INSPECT GENERATOR ROTOR ASSEMBLY

Check the generator rotor for an open circuit.

Using an ohmmeter, measure the resistance between the slip rings.

Fig 3: Measuring Resistance Between Slip Rings

GTY170597

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
Slip ring - Slip ring	Approx. 20°C (68°F)	2.3 to 2.7 Ω

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

Check the rotor for a short to ground.

Using an ohmmeter, measure the resistance between one of the slip rings and the rotor.

Fig 4: Measuring Resistance Between Slip Ring And Rotor Core

GTY161815

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Condition	Condition	Specified Condition
Slip ring - Rotor core	-	1 MΩ or higher

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

Check that the generator rotor bearing is not rough or worn.

Fig 5: Checking Bearing
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If necessary, replace the generator rotor assembly.
Using a vernier caliper, measure the slip ring diameter.

Fig 6: Measuring Slip Ring Diameter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. 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 mm (0.551 in.)
  
  If the diameter is less than the minimum, replace the generator rotor assembly.

INSPECT GENERATOR DRIVE END FRAME BEARING
1. Check that the bearing is not rough or worn.
  
  Fig 7: Checking Bearing Rough Or Worn
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If necessary, replace the generator drive end frame bearing.