DISTRIBUTORLESS Ignition System: Notes

NOTE: Distributorless Ignition System (DIS) may also be referred to as Electronic Ignition (EI) system.

Distributorless Ignition System (DIS) consists of multiple coils or coil packs, Ignition Control Module (ICM), crankshaft position sensor and PCM. On Rodeo 2.2L, waste-spark ignition is used. Coil packs consist of 2 independently mounted ignition coils, each firing two cylinders at a time. On V6 engines, each cylinder has its own independent ignition coil mounted on top of the spark plug. ICM receives ignition control signals from PCM which in turn triggers corresponding ignition coils. PCM controls spark timing and ignition during crank and run modes.

Crankshaft position sensor magnetic pick-up provides a signal to PCM to identify correct firing sequence and crank signals to trigger each coil at proper time. PCM controls timing and fuel injector pulse width using crankshaft position, engine RPM, engine temperature and MAP sensor input signals.