B Series Truck 2WD L4-2184cc 2.2L 2200 2-bbl (1990)
Ignition Control Module: Description and Operation
The Igniter, located near the coil on the left inner fender, is a switching device that activates the primary ignition coil circuit. The ECU determines
optimum ignition timing from various inputs and transmits a primary current "OFF" signal to the igniter to control ignition timing.
The ECU calculates input from these devices to control ignition timing:
Distributor Ne signal
Water thermosensor
Airflow sensor
Idle switch
Ignition switch ("START" position)
Test connector (for base timing adjustment)
