ECM Power Source Circuit [09/2022 - 11/2022]: Description
WARNING: This page is about a different variant/trim than selected.
When the ignition switch is turned to ON, the battery voltage is applied to the IGSW*1 or IGP*2 terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil of the No. 1 integration relay (EFI-MAIN relay)*1 or EFI-MAIN NO. 1*2, closing the contacts of the EFI-MAIN relay*1 or EFI-MAIN NO. 1 relay*2 and supplying power to terminals +B and +B2 of the ECM.
- *1: for TMMMS Made
- *2: for TMC Made