Optima, Magentis (Canadian) 2.4L & Sedona
NOTE:
Power transistor is built into ignition coil.
To perform primary coil resistance check, connect negative (-) terminal of a 3 volt power supply to terminal No. 2 of power transistor. See Fig 1. Check for continuity, about .78 Ohm, between terminals No. 2 and 3. Continuity should exist when terminal No. 1 is connected to 3 volt power (+) supply. When 3 volt power supply is removed, continuity should no longer exist. If problem exists, replace power transistor/ignition coil. To test secondary resistance measure resistance between high-voltage terminals of ignition coil, see Fig 1. For resistance specification, see IGNITION COIL RESISTANCE table.