Section 108 (Charging System): Generator: Inspection

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

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 kΩ or higher
    
    If the result is not as specified, replace the rotor assembly.
  Fig 2: Measuring Resistance Between Slip Ring & Rotor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the slip rings are not rough or scored.
  If rough or scored, replace the rotor assembly.
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 Using Vernier Caliper
  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 Using Vernier Caliper
  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.
Fig 5: Checking If Bearing Is Rough Or Worm
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT GENERATOR ROTOR BEARING
1. Check that the bearing is not rough or worn. If necessary, replace the generator rotor.