Test C: Engine Control Module Power & Ground Circuit Check (Engine Does Not Start): Condition

When ignition switch is turned to ON position, main relay is energized by the Engine Control Module (ECM) and supplies ECM with main power. As ECM is supplied with main power, it will turn ON the MIL. After engine starts, MIL will turn OFF if no malfunction is detected. If a malfunction is detected, MIL will remain ON until system is repaired.