Colt Vista AWD L4-1795cc 1.8L SOHC (1992)
Power Transistor: Description and Operation
Ignition Coil/power Transistor Location
PURPOSE
The power transistor controls ignition discharge by interrupting the ignition coil primary current ground. The power transistor is a solid state
component.
LOCATION
Built into the distributor, on the rear of the cylinder head.
OPERATION
The power transistor 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 ECM controls transistor switching, enabling the ECM to regulate ignition timing based engine operating condition
information received from various sensors.
