2AZ-FE Charging: Generator: Inspection

INSPECT GENERATOR CLUTCH PULLEY
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 generator clutch pulley.
  
  Fig 1: Checking Clutch Pulley
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
1. Using vernier calipers, measure the brush length.
  Standard length:
  
  9.5 to 11.5 mm (0.374 to 0.453 in.)
  
  Minimum length:
  
  4.5 mm (0.177 in.)
  
  If the brush length is less than the minimum, replace the generator brush holder assembly.
  
  Fig 2: Measuring Brush Length
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT GENERATOR ROTOR ASSEMBLY

Check the appearance.
1. Check that the bearing is not rough or worn.
  OK:
  
  The bearing rotates smoothly.
  
  If the result is not as specified, replace the generator rotor assembly.
  
  Fig 3: Checking Bearing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance.

Measure the resistance between the slip rings.

Standard resistance

STANDARD RESISTANCE SPECIFICATIONS

Condition	Specified condition
20°C (68°F)	2.3 to 2.7 Ω

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

Fig 4: Measuring Resistance Between Slip Rings

G04975742

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance between the slip ring and rotor core.

Standard resistance

STANDARD RESISTANCE SPECIFICATIONS

Tester connection	Specified condition
Slip ring - Rotor core	1 MΩ or higher

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

Fig 5: Measuring Resistance Between Slip Ring And Rotor Core

G04975743

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the slip ring diameter.
1. Using vernier calipers, 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.
  
  Fig 6: Measuring Slip Ring Diameter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT GENERATOR DRIVE END FRAME BEARING
1. Check that the bearing is not rough or worn.
  OK:
  
  The bearing rotates smoothly.
  
  If the bearing does not rotate smoothly, replace the bearing.
  
  Fig 7: Checking Bearing Rough Or Worn
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002