Ignition Keyed Power
When the ignition switch is turned on, the ECM grounds the control circuit (coils) of the EFI main relay. This supplies battery power to the ECM. This circuit is also protected by the EFI fuse.
When the ignition switch is turned on, the ECM grounds the control circuit (coils) of the EFI main relay. This supplies battery power to the ECM. This circuit is also protected by the EFI fuse.