Starting System & Charging System: Generator: Inspection: Diode

CAUTION: There is the possibility of damaging the diodes if a mega-tester or a similar measuring instrument is used. Never use a mega tester or equivalent for this test.

1. Check for continuity between the diode lead and terminal E or B. If continuity is not as shown in the table, replace the stator coil assembly.
   • At analog type tester

     Tester lead		Continuity
     -lead	+lead
     E	P1, P2, P3, P4, P5, P6	Yes
     B		No
     P1, P2, P3, P4, P5, P6	E	No
     	B	Yes

   • At digital type tester

Tester lead		Continuity
-lead	+lead
E	P1, P2, P3, P4, P5, P6	No
B		Yes
P1, P2, P3, P4, P5, P6	E	Yes
	B	No

Fig 1: Checking Continuity Between Diode Lead And Terminal (E/B)

Courtesy of SUBARU OF AMERICA, INC.