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Home >> Mitsubishi >> 1994 >> Eclipse Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> DISTRIBUTORLESS Ignition System (Dis) 4-Cylinder >> Power Transistor
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Power Transistor

  1. To test the section of the power transistor that controls cylinders No. 1 and 4 of the ignition coil, disconnect power transistor connector. Using a 1.5-volt dry cell battery, connect negative end of battery to terminal No. 3 of power transistor and positive end to terminal No. 7. See Fig 1 .
  2. Using an analog ohmmeter, check for continuity between terminals No. 3 and 8 of power transistor. Continuity should exist. With positive end of 1.5-volt battery disconnected, there should be no continuity. Replace power transistor if it fails test.
  3. To test the section of the power transistor that controls cylinders No. 2 and 4 , connect negative end of 1.5-volt dry cell battery to terminal No. 3 of power transistor and positive end to terminal No. 2.
  4. Using an analog ohmmeter, check for continuity between terminals No. 1 and 3 of power transistor. Continuity should exist. With positive end of 1.5-volt battery disconnected, there should be no continuity. Replace power transistor if it fails test.
    Fig 1: Identifying Power Transistor Connector (DIS)
    G93B78155Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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