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Home >> Saturn >> 2003 >> LW300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> System Test >> Malfunction Indicator Light Inoperative >> Circuit Description
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Circuit Description

Battery positive voltage is supplied directly to the Malfunction Indicator Light (MIL). The Engine Control Module (ECM) turns the MIL ON by grounding the MIL control circuit. There should be a steady MIL with the ignition ON and the engine OFF.

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