Aurora V6-214 3.5L VIN H SFI (2001)
Ignition Control Module: Description and Operation
IGNITION COILS/MODULES
The ignition system on this engine uses an individual ignition coil for each cylinder. An ignition coil assembly consisting of 3 coils and an ignition
control module is located in the center of each cam cover. This arrangement allows the ignition coil to connect directly to the spark plug using only a
boot. This eliminates the need for secondary ignition wires. There are separate ignition modules for Bank 1 and for Bank 2. Each module controls the 3
ignition coils for that bank of cylinders. The PCM controls the ignition module operation. There are 6 Ignition Control (IC) circuits, one per cylinder,
that connect the PCM and the ignition modules. Each ignition module also has a power feed, a chassis ground circuit, and a Reference Low circuit. The
PCM causes spark to occur by pulsing the IC circuit, which signals the ignition module to trigger the ignition coil and fire the spark plug. The sequencing
and the timing are PCM controlled.
The ignition feed circuits are fused separately for each bank of the engine. The 2 fuses also supply the injectors for that bank of the engine.
This system puts out very high ignition energy for plug tiring. Because there are no ignition wires, there is no energy loss due to ignition wire resistance.
Also, since the firing is sequential, each coil has 5 events to saturate as opposed to the 2 in a waste spark arrangement. Further more, no energy is lost to
the resistance of a waste spark system.
