ECU Power Source Circuit [11/2022 - 09/2024]: Description
WARNING: This page is about a different variant/trim than selected.
When the engine switch is turned on (IG), battery voltage is applied to terminal MREL of the ECM through the coil of the EFI-MAIN NO. 1 relay. This causes the EFI-MAIN NO. 1 relay to close, which supplies power to terminal +B of the TCM.