In the TDI system, the conventional distributor is no longer used as in the ignition system. Instead, it provides an ignition coil with an independent integrated igniter for each of the cylinders. Because this system does not require the use of a distributor or high-tension cords, it can reduce energy loss in the high-voltage area and improve durability. At the same time, it minimizes electromagnetic interference because contact points are no longer used in the highvoltage area. The ignition timing control is performed through the use of the ESA.