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Ignitor Power Transistor Check

  1. Turn ignition off. Unplug ignition module 4-pin connector. Disconnect each ignition coil pack 2-pin connector.
  2. Turn ignition switch to ON position. Connect ohmmeter between terminal No. 2 of third ignition coil and ground. Using a 3-volt dry cell battery, apply 3 volts to terminal No. 2 of 4-pin connector. With 3 volts applied, ensure ohmmeter indicates momentary continuity. See Fig 2.
  3. Connect ohmmeter between terminal No. 2 of first ignition coil and ground. Apply 3 volts to terminal No. 4 of 4-pin connector. With 3 volts still applied to terminal No. 4, also apply 3 volts to terminal No. 2. Check that ohmmeter indicates momentary continuity. See Fig 2.
  4. Connect ohmmeter between terminal No. 2 of second ignition coil and ground. Apply 3 volts to terminal No. 3 of 4-pin connector. With 3 volts still applied to No. 3, also apply 3 volts to terminal No. 2. Ensure ohmmeter indicates momentary continuity. See Fig 2.
Fig 1: Ignition System Schematic (Supra Turbo)
G118584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing Ignitor (Supra Turbo)
G118585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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