ECU Power Source Circuit [10/2014 - 10/2015]: Description
If the power switch is on (IG), the power management control ECU applies current to the MREL terminal to turn the IGCT relay on. This supplies power to the +B1 and +B2 terminals.
If the power switch is on (IG), the power management control ECU applies current to the MREL terminal to turn the IGCT relay on. This supplies power to the +B1 and +B2 terminals.