Sundance V6-181 3.0L SOHC (1994)
Ignition Coil: Description and Operation
Coil Location And Connector Terminals
Ignition Coil Operation (Coil Construction May Vary)
PURPOSE
Steps up primary voltage of 12 Volts to a secondary voltage great enough to arc across the spark plug gap, and ignite the air fuel mixture,
(25,000-35,000 Volts).
OPERATION
The Powertrain Control Module (PCM), Controls Ignition Dwell And Timing Through The Coil Primary Ground Circuit.
Battery voltage is supplied to the coil primary circuit by the ASD relay.
When the primary windings of the coil are grounded, current flow in the windings generates an electromagnetic field. (Low primary resistance of
0.95-1.20 ohms, allows the PCM to fully charge coil in a very short period).
The electromagnetic field is concentrated by the iron core.
When the ground is removed, the concentrated field collapses, inducing high voltage in the secondary windings.
This high voltage is routed to the spark plugs via the distributor rotor, cap, and secondary ignition wires.
