Ignition Coils/Module

The ignition system on this vehicle features a multiple coil ignition and is known as coil near plug. The secondary ignition wires are short compared with a distributor ignition system wire. Eight ignition coils/modules are individually mounted above each cylinder on the rocker covers. The coils/modules are fired sequentially. There is an Ignition Control (IC) circuit for each ignition coil/module. The eight ignition control circuits are connected to the PCM. All ignition timing decisions are made by the PCM, which triggers each coil/module individually. The ignition coil/modules are supplied with the following circuits:
^ Ignition feed circuit
^ Ignition control circuit
^ Ground circuit
^ Reference low circuit




The ignition feed circuits are fused separately for each bank of the engine. The two fuses also supply power to the injectors for that bank of the engine. Each coil/module is serviced separately.

This system puts out very high ignition energy for plug firing. The ignition wires are shorter so less energy is lost to ignition wire resistance. Also, since the firing is sequential, each coil has seven ignition events to saturate as opposed to the three in a waste spark arrangement. Furthermore, no energy is lost to the resistance of a waste spark system.