The Subaru WRX V5-V6 ignition coil pack operates in a wasted spark ignition mode.
Ignition 1 activates coil outputs 1 and 2.
Ignition 2 activates coil outputs 3 and 4.
Wiring Information > Output Wiring > Ignition Drives > Specific Ignition Applications > Subaru V5 V6 Coil Wiring
