Ignition Coil

Ignition coils are made integral with an igniter. The ignition system is of a dual-ignition-coil design, each coil causing two plugs to generate sparks simultaneously. In response to the signal from the ECM, the ignitor supplies current to an ignition coil and the ignition coil supplies high-voltage current to a pair of spark plugs (#1 and #2 or #3 and #4) simultaneously.

Fig 1: Identifying Ignition Coils And Ignition Assembly

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Ignition Coils Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.