Legacy Sedan 2WD F4-2.2L SOHC (1990)
Ignition Control Module: Description and Operation
Ignition Signal
Ignition Circuit
PURPOSE
The ignition signal is used by the ECU to control the ignitor unit. This allows ignition triggering to be accomplished with a relatively low current
signal from the ECU.
OPERATION
A signal is sent to the ignitor module whenever the engine is running. The signals are an on/off pulse, telling the ignitor when to fire the ignition
coil.