Ignition Coil: Description and Operation
IGNITION COILBattery voltage is supplied to the ignition coil positive terminal from the ASD relay.
The Powertrain Control Module (PCM) opens and closes the ignition coil ground circuit for ignition coil operation.
Base ignition timing is not adjustable on any engine. By controlling the coil ground circuit, the PCM is able to set the base timing and adjust the ignition timing advance. This is done to meet changing engine operating conditions.
The ignition coil is not oil filled. The windings are embedded in an epoxy compound. This provides heat and vibration resistance that allows the ignition coil to be mounted on the engine.
IGNITION COIL-ENGINES-PCM OUTPUT
System voltage is supplied to the ignition coil positive terminal. The Powertrain Control Module (PCM) operates the ignition coil. Base (initial) ignition timing is not adjustable. The PCM adjusts ignition timing to meet changing engine operating conditions.
Ignition Coil:
The ignition coil is located near the front of the right cylinder head.
Refer to Ignition System for additional information.