Toyota Matrix ECM Power Source Circuit. When the ignition switch is turned ON, battery positive voltage is applied to the coil which closes the contacts of the E.F.I. relay (Marking: E.F.I.) and supplies power to the terminal +B of the ECM. The 2003 Toyota Matrix ECM Power Source Circuit consists of: instrument panel junction block, ignition switch, EFI relay, battery and ECM. Below schematic shows the Toyota Matrix ECM Power Source Circuit and Wiring Diagram.

Toyota Matrix ECM Power Source Circuit Wiring Diagram



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