Nissan Micra Alternator Stator & Diode Check - Continuity Test Procedure

This is page EL-27 of a factory service manual covering the charging system (alternator), specifically the Stator Check and Diode Check procedures. The stator check requires unsoldering the connecting wires to separate stator and diode, with a caution to use only as much heat as needed to melt solder because excessive heat damages diodes (long nose pliers are shown used as a heat sink). Two stator tests are described: a continuity test between lead wires (no continuity means replace stator) and a ground test between lead wire and stator core (continuity means replace stator). The diode check is a continuity test with an ohmmeter, tabulated for six probe combinations: terminal plate (B) to diode terminal should show continuity while the reverse should not; (−) heat sink to diode terminal should show no continuity while the reverse shows continuity; terminal plate (L) to diode terminal shows continuity while the reverse does not. A labeled diagram identifies the (−) heat sink, diode terminal, terminal plates B and L, sub diode, and (+) heat sink. A positive diode test illustration follows; if the conduction test is N.G., the diode assembly must be replaced. Illustration reference codes SEL054D, SEL070, SEL071, SEL903A, and SEL904A appear.