D250 3/4 Ton Pickup 2WD V8-360 5.9L VIN 5 4-bbl (1988)
Powertrain Control Module: Description and Operation
Electronic Control Unit
The Electronic Control Unit (ECU) is a solid state monitoring and triggering unit that receives ignition signals from the distributor that cause the power
transistor to switch off and on triggering the coil to fire.