Eclipse L4-1997cc 2.0L DOHC (1991)
Ignition Control Module: Description and Operation
Component Overview
The Ignition Timing Control System operates by the ECU controlling the ignition timing through the 2 power transistors. The ECU uses all of the engine
condition and vehicle operating condition sensors (during normal driving conditions) to compute the correct spark advance or retard. The ECU uses the
power transistors to control the ignition spark.
The power transistors function to control the ignition timing by interrupting the ignition coils primary current ground causing secondary circuit
discharge. The power transistors are solid state components.