ECU Power Source Circuit [08/2014 - ]: Description

When the power switch is turned on (IG), current flows from the IG2D terminal of the power management control ECU to the IG2 relay. This closes the IG2 relay contact points and sends the IG2 signal to the IG2 terminal of the plugin charge control ECU assembly. The plugin charge control ECU assembly supplies the charging power to the +B1 terminal by allowing current to flow into the MREL terminal and closing the PIMR relay. However, during plug-in charging, only the PIMR relay is closed and the IG2 relay is open.