The “Electrical System Service Required” alert is generated by the or the Engine Control Unit (ECU) . It means that one or more electrical parameters have fallen outside of the manufacturer’s acceptable range.
If the alternator isn’t producing enough voltage (should be 13.5–14.8V when running) or is overcharging, the system will detect the irregularity and display the alert. electrical system service required mitsubishi
If the light illuminates while you are driving, do not panic, but take the following precautions immediately: do not panic