Solara Coupe L4-2.4L (2AZ-FE) (2007)
Engine Control Module: Component Tests and General Diagnostics
ECM Power Source Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, the battery voltage is applied to IGSW of the ECM. The output signal from the MREL terminal of
the ECM causes a current to flow to the coil, closing the contacts of the EFI relay and supplying power to either terminal +B or +B2 of the ECM.
Wiring Diagram