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Home >> Mitsubishi >> 1999 >> Eclipse GS-T, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Ignition Checks >> DISTRIBUTORLESS Ignition System (Dis - 4-Cylinder) >> Power Transistor (Eclipse Turbo & 2.4L)
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Power Transistor (Eclipse Turbo & 2.4L)

CAUTION: Power transistor test must be performed in less than 10 seconds to prevent coil from burning and power transistor from breaking.
  1. To test the section of the power transistor that controls cylinders No. 1 and 4, 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 3, 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 Terminals (Eclipse Turbo & 2.4L)
G96C09822Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.