Volvo Penta Group 23 EDC III — Checking the rotor
Testing & diagnosis · Generator rotor
For the Volvo Penta Group 23 EDC III, from the Volvo Penta service manual.
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Procedure
- Set the multimeter for diode measurement.
- Connect the test probes to the slip rings.
- The instrument reading should be nonexistent or very weak.
- Check that the slip rings are not burned or otherwise damaged.
Tools required
- Multimeter (diode measurement) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Volvo Penta service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.