Location of Ignition Control Module for L-Series Wagon 4WD F4-1781cc 18L SOHC (SPFI) (1986)
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Ignition Control Module: Description and Operation
SPFI Ignition System Power Transistor
PURPOSE
Controls ignition discharge by interrupting the ignition coil primary current ground. The ignitor is a solid state component.
LOCATION
On the left strut tower.
OPERATION
The ignitor is a switching device used to interrupt the ignition coil ground connection and induce high voltage from the coil secondary windings.
A signal from the ECU controls ignitor switching, enabling the ECU to regulate ignition timing based engine operating condition information
received from various sensors.