A-3: Malfunction Indicator Light Inoperative & Engine Does Not Start (ECM Power & Ground Circuit Check): Condition
WARNING: This page is about a different car, the 2002 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
When ignition switch is turned to ON position, main relay turns ON (contact point closes) and main power is supplied to Engine Control Module (ECM).