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Power Transistor

NOTE: The DVOM must have a diode check position and be able to measure up to 20 megohms to perform this test.
  1. Disconnect ignition coil (power transistor) connector. See Fig 1 . At power transistor, check continuity between the following terminals, noting ohmmeter test lead polarity:
    • "1" (+) and "2" (-).
    • "1" (+) and "3" (-).
    • "2" (+) and "1" (-).
    • "2" (+) and "3" (-).
    • "3" (+) and "1" (-).
    • "3" (+) and "2" (-).
  2. If there is continuity, replace power transistor. If there is no continuity, reverse DVOM test lead polarity and check continuity across terminals listed in previous step. If there is no continuity, replace power transistor. If there is continuity, power transistor is okay.
Fig 1: Identifying Power Transistor Connector Terminals
G95F31513Courtesy of NISSAN MOTOR CO., U.S.A.
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