Generator Inner Parts: Rotor

Measure the resistance between the slip rings using an ohmmeter.
- If not within the specification, replace the rotor.
  Specification [20 °C {68 °F}]
  
  L3: 1.6-2.0 ohm
  
  AJ: 2.4-2.9 ohm
  
  Fig 1: Measuring Resistance Between Slip Rings Using Ohmmeter
  Courtesy of MAZDA MOTORS CORP.
Verify that there is no continuity between the slip ring and core using an ohmmeter.
- If there is continuity, replace the rotor.
Fig 2: Inspecting Slip Ring Surface Condition
Courtesy of MAZDA MOTORS CORP.
Inspect the slip ring surface condition.
- If the slip ring surface is rough, use a lathe or fine sandpaper to repair it.