Matrix FWD L4-2.4L (2AZ-FE) (2009)
Engine Control Module: Component Tests and General Diagnostics
2AZ-FE ENGINE CONTROL: SFI SYSTEM: ECM Power Source Circuit
ECM Power Source Circuit
DESCRIPTION
When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of
the ECM causes a current to flow to the EFI MAIN relay coil, closing the EFI MAIN relay contacts and supplying power to terminal +B of the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. INSPECT INTEGRATION RELAY (POWER SOURCE)