Ignition Coil: Description and Operation
DESCRIPTIONThe ignition coil contains three separate ignition coils. Each coil is controlled by the Powertrain Control Module (PCM) through three coil leads.
OPERATION
Each ignition coil fires two spark plugs simultaneously in the following manner:
1. One spark plug on the compression stroke. This spark plug uses the majority of the ignition coil energy.
2. One spark plug on the exhaust stroke. This spark plug will use very little of the ignition coil stored energy.
These two spark plugs are connected in series, so the firing voltage of one spark plug will be negative with respect to ground, and the other spark plug will be positive with respect to ground.