< 2.4L Engine >
This system is provided with four ignition coils with built-in ignition power transistors for each of the cylinders.
Interruption of the primary current flowing in the primary side of ignition coil generates a high voltage in the secondary side of ignition coil.
The powertrain control module (PCM) controls the four ignition power transistors to turn them alternately ON and OFF. This causes the primary currents in the ignition coils to be alternately interrupted and allowed to flow to fire the cylinders in the order 1-3-4-2.