Subaru 2002 Impreza Service Manual page 204

IGNITION COIL
Ignition
1. Ignition Coil
Ignition coils are made integral with an ignitor.
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.
r .
NF0034
(1) Ignition coil and ignitor assembly
IG-2